diff --git a/changelog.d/md-ssp.added.md b/changelog.d/md-ssp.added.md
new file mode 100644
index 00000000000..34373543d7e
--- /dev/null
+++ b/changelog.d/md-ssp.added.md
@@ -0,0 +1 @@
+Add Maryland Public Assistance to Adults (state SSP).
diff --git a/policyengine_us/parameters/gov/household/household_state_benefits.yaml b/policyengine_us/parameters/gov/household/household_state_benefits.yaml
index b74241a36b5..b376eeff0df 100644
--- a/policyengine_us/parameters/gov/household/household_state_benefits.yaml
+++ b/policyengine_us/parameters/gov/household/household_state_benefits.yaml
@@ -14,6 +14,8 @@ values:
     - me_ssp
     # Massachusetts benefits
     - ma_state_supplement
+    # Maryland benefits
+    - md_paa
     # Michigan benefits
     - mi_ssp
     # Colorado benefits
@@ -81,6 +83,8 @@ values:
     - me_ssp
     # Massachusetts benefits
     - ma_state_supplement
+    # Maryland benefits
+    - md_paa
     # Michigan benefits
     - mi_ssp
     # Colorado benefits
diff --git a/policyengine_us/parameters/gov/states/md/dhs/fia/paa/personal_needs_allowance.yaml b/policyengine_us/parameters/gov/states/md/dhs/fia/paa/personal_needs_allowance.yaml
new file mode 100644
index 00000000000..f97760640e9
--- /dev/null
+++ b/policyengine_us/parameters/gov/states/md/dhs/fia/paa/personal_needs_allowance.yaml
@@ -0,0 +1,25 @@
+description: Maryland provides this amount as the personal needs allowance under the Public Assistance to Adults program.
+
+values:
+  2009-01-01: 82
+  2022-01-01: 84
+  2022-07-01: 93
+  2023-07-01: 98
+  2024-07-01: 102
+  2025-07-01: 106
+
+metadata:
+  unit: currency-USD
+  period: month
+  label: Maryland PAA personal needs allowance
+  reference:
+    - title: COMAR 07.03.07.04(A)(1) Need Requirements
+      href: https://regs.maryland.gov/us/md/exec/comar/07.03.07.04
+    - title: Maryland DHS-FIA Action Transmittal 22-09, FFY22 COLA Mass Mod
+      href: https://dhs.maryland.gov/documents/FIA/Action%20Transmittals-AT%20-%20Information%20Memo-IM/AT-IM2022/22-09%20AT-%20COLA%20Mass%20Mod%20FFY22.pdf
+    - title: Maryland DHS-FIA Action Transmittal 22-28, Increase in Personal Needs Allowance
+      href: https://dhs.maryland.gov/documents/FIA/Action%20Transmittals-AT%20-%20Information%20Memo-IM/AT-IM2022/22-28%20AT%20-%20INCREASE%20IN%20PERSONAL%20NEEDS%20ALLOWANCE.pdf
+    - title: Maryland DHS-FIA Information Memo 24-05, June 2023 Mass Modification
+      href: https://dhs.maryland.gov/documents/FIA/Action%20Transmittals-AT%20-%20Information%20Memo-IM/AT-IM2024/24-05%20IM%20-%20JUNE%202023%20MASS%20MODIFICATION.pdf
+    - title: Maryland DHS-FIA Information Memo 26-04, 2025 PNA Increase
+      href: https://dhs.maryland.gov/documents/FIA/Action%20Transmittals-AT%20-%20Information%20Memo-IM/AT-IM2026/26-04%20IM%202025%20PNA%20Increase.pdf#page=2
diff --git a/policyengine_us/parameters/gov/states/md/dhs/fia/paa/provider_rate.yaml b/policyengine_us/parameters/gov/states/md/dhs/fia/paa/provider_rate.yaml
new file mode 100644
index 00000000000..8ca82130603
--- /dev/null
+++ b/policyengine_us/parameters/gov/states/md/dhs/fia/paa/provider_rate.yaml
@@ -0,0 +1,44 @@
+description: Maryland provides this amount as the monthly provider rate by living arrangement under the Public Assistance to Adults program.
+
+metadata:
+  unit: currency-USD
+  period: month
+  label: Maryland PAA provider rate
+  breakdown:
+    - md_paa_living_arrangement
+  reference:
+    - title: COMAR 07.03.07.04(B)(2), (C)(2), and (D) Need Requirements
+      href: https://regs.maryland.gov/us/md/exec/comar/07.03.07.04
+    - title: COMAR 07.03.07.09A Amount of Grant
+      href: https://regs.maryland.gov/us/md/exec/comar/07.03.07.09
+    - title: Maryland DHS-FIA Action Transmittal 18-11, 2018 COLA Increase
+      href: https://dhs.maryland.gov/documents/FIA/Action%20Transmittals-AT%20-%20Information%20Memo-IM/AT-IM2018/18-11%20AT%20COLA%20Increase%202018.doc
+    - title: Maryland DHS-FIA Action Transmittal 23-02, FFY23 COLA Mass Mod (PAA rates remain the same)
+      href: https://dhs.maryland.gov/documents/FIA/Action%20Transmittals-AT%20-%20Information%20Memo-IM/AT-IM2023/23-02%20AT%20-%20COLA%20Mass%20Mod%20FFY23.pdf#page=3
+
+# 2009-01-01 values from COMAR 07.03.07.04(B)(2) (CARE Home Levels A-D) and
+# (C)(2) (Licensed Assisted Living). 2018-01-01 values first documented in
+# AT 18-11 and unchanged through every subsequent COLA Mass Mod (AT 19-08,
+# 20-10, 21-18, 22-09, 23-02 — all say "PAA Rates remain the same").
+# REHAB_RESIDENCE provider_rate is $0 because PAA Manual §900.3 / AT 23-02
+# treat MDH Rehabilitative Residence as PNA-only (the $54/day cost is paid
+# directly by MHA, not by PAA). Do not "fix" REHAB to 54 * 30.
+CARE_HOME_LEVEL_A:
+  2009-01-01: 740
+  2018-01-01: 776
+CARE_HOME_LEVEL_B:
+  2009-01-01: 849
+  2018-01-01: 875
+CARE_HOME_LEVEL_C:
+  2009-01-01: 1_137
+  2018-01-01: 1_173
+CARE_HOME_LEVEL_D:
+  2009-01-01: 1_340
+  2018-01-01: 1_376
+ASSISTED_LIVING:
+  2009-01-01: 858
+  2018-01-01: 894
+REHAB_RESIDENCE:
+  2009-01-01: 0
+NONE:
+  2009-01-01: 0
diff --git a/policyengine_us/programs.yaml b/policyengine_us/programs.yaml
index 76b5377b5f3..684acd42f3b 100644
--- a/policyengine_us/programs.yaml
+++ b/policyengine_us/programs.yaml
@@ -701,6 +701,12 @@ programs:
         name: Massachusetts SSP
         full_name: Massachusetts State Supplementary Payment
         variable: ma_state_supplement
+      - state: MD
+        status: complete
+        name: Maryland PAA
+        full_name: Maryland Public Assistance to Adults
+        variable: md_paa
+        parameter_prefix: gov.states.md.dhs.fia.paa
       - state: MI
         status: complete
         name: Michigan SSP
diff --git a/policyengine_us/tests/policy/baseline/gov/states/md/dhs/fia/paa/integration.yaml b/policyengine_us/tests/policy/baseline/gov/states/md/dhs/fia/paa/integration.yaml
new file mode 100644
index 00000000000..00452d06534
--- /dev/null
+++ b/policyengine_us/tests/policy/baseline/gov/states/md/dhs/fia/paa/integration.yaml
@@ -0,0 +1,558 @@
+# Integration tests for Maryland Public Assistance to Adults (PAA).
+# Verifies the prospective SSI cascade method: PAA equals combined need minus
+# SSI countable income and imputed federal SSI. Period 2026-01: federal
+# individual FBR = $994, couple FBR = $1,491, medical-facility rate = $30,
+# PNA = $106.
+
+- name: Case 1, single SSI in CARE_HOME_LEVEL_B — federal SSI exceeds combined need.
+  period: 2026-01
+  absolute_error_margin: 0.01
+  input:
+    people:
+      person1:
+        age: 70
+        is_blind: false
+        is_disabled: false
+        immigration_status: CITIZEN
+        ssi_countable_resources: 1_000
+        employment_income: 0
+        md_paa_living_arrangement: CARE_HOME_LEVEL_B
+    marital_units:
+      marital_unit:
+        members: [person1]
+    tax_units:
+      tax_unit:
+        members: [person1]
+    spm_units:
+      spm_unit:
+        members: [person1]
+    households:
+      household:
+        members: [person1]
+        state_code: MD
+  output:
+    is_ssi_eligible: [true]
+    ssi: [994]
+    md_paa_eligible: [true]
+    # combined_need = 875 + 106 = 981. imputed SSI = 994.
+    # PAA = max(981 - 994, 0) = 0.
+    md_paa_provider_rate: [875]
+    md_paa_personal_needs_allowance: [106]
+    md_paa_total_cost_of_care: [981]
+    md_paa: [0]
+
+- name: Case 2, SSI recipient with $200/mo earned income in CARE_HOME_LEVEL_C.
+  period: 2026-01
+  absolute_error_margin: 0.01
+  input:
+    people:
+      person1:
+        age: 70
+        is_blind: false
+        is_disabled: false
+        immigration_status: CITIZEN
+        ssi_countable_resources: 500
+        employment_income: 2_400  # $200/mo
+        md_paa_living_arrangement: CARE_HOME_LEVEL_C
+    marital_units:
+      marital_unit:
+        members: [person1]
+    tax_units:
+      tax_unit:
+        members: [person1]
+    spm_units:
+      spm_unit:
+        members: [person1]
+    households:
+      household:
+        members: [person1]
+        state_code: MD
+  output:
+    # Federal countable = max(0, 200 - 65 - 20) * 0.5 = 57.50.
+    # SSI = 994 - 57.50 = 936.50.
+    is_ssi_eligible: [true]
+    ssi: [936.50]
+    md_paa_eligible: [true]
+    # combined_need = 1173 + 106 = 1279. imputed SSI = 936.50.
+    # countable = 57.50. PAA = 1279 - 936.50 - 57.50 = 285.
+    md_paa_total_cost_of_care: [1_279]
+    md_paa: [285]
+
+- name: Case 3, SSI recipient with $400/mo OASI in ASSISTED_LIVING.
+  period: 2026-01
+  absolute_error_margin: 0.01
+  input:
+    people:
+      person1:
+        age: 70
+        is_blind: false
+        is_disabled: false
+        immigration_status: CITIZEN
+        ssi_countable_resources: 800
+        social_security: 4_800  # $400/mo OASI
+        employment_income: 0
+        md_paa_living_arrangement: ASSISTED_LIVING
+    marital_units:
+      marital_unit:
+        members: [person1]
+    tax_units:
+      tax_unit:
+        members: [person1]
+    spm_units:
+      spm_unit:
+        members: [person1]
+    households:
+      household:
+        members: [person1]
+        state_code: MD
+  output:
+    # Federal countable unearned = 400 - 20 = 380. SSI = 994 - 380 = 614.
+    is_ssi_eligible: [true]
+    ssi: [614]
+    md_paa_eligible: [true]
+    # combined = 894 + 106 = 1000. imputed SSI = 614.
+    # countable = 380. PAA = 1000 - 614 - 380 = 6.
+    md_paa_total_cost_of_care: [1_000]
+    md_paa: [6]
+
+- name: Case 4, REHAB_RESIDENCE recipient — state fills gap from $30 medical SSI to PNA.
+  period: 2026-01
+  absolute_error_margin: 0.01
+  input:
+    people:
+      person1:
+        age: 70
+        is_blind: false
+        is_disabled: false
+        immigration_status: CITIZEN
+        ssi_countable_resources: 500
+        employment_income: 0
+        md_paa_living_arrangement: REHAB_RESIDENCE
+        # MDH rehab is a Title XIX medical treatment facility for SSI;
+        # federal SSI is capped at $30/mo. md_paa_eligible requires both.
+        ssi_lives_in_medical_treatment_facility: true
+        ssi_medicaid_pays_majority_of_care: true
+    marital_units:
+      marital_unit:
+        members: [person1]
+    tax_units:
+      tax_unit:
+        members: [person1]
+    spm_units:
+      spm_unit:
+        members: [person1]
+    households:
+      household:
+        members: [person1]
+        state_code: MD
+  output:
+    is_ssi_eligible: [true]
+    # Federal SSI = $30/mo medical-facility rate (annualized $360).
+    ssi: [30]
+    md_paa_eligible: [true]
+    # combined = 0 + 106 = 106. imputed SSI = $30.
+    # countable = 0. PAA = 76.
+    md_paa_provider_rate: [0]
+    md_paa_personal_needs_allowance: [106]
+    md_paa: [76]
+
+- name: Case 5, married couple both SSI-eligible in CARE_HOME_LEVEL_A.
+  period: 2026-01
+  absolute_error_margin: 0.01
+  input:
+    people:
+      person1:
+        age: 70
+        is_blind: false
+        is_disabled: false
+        immigration_status: CITIZEN
+        ssi_countable_resources: 1_000
+        employment_income: 0
+        md_paa_living_arrangement: CARE_HOME_LEVEL_A
+      person2:
+        age: 68
+        is_blind: false
+        is_disabled: false
+        immigration_status: CITIZEN
+        ssi_countable_resources: 1_000
+        employment_income: 0
+        md_paa_living_arrangement: CARE_HOME_LEVEL_A
+    marital_units:
+      marital_unit:
+        members: [person1, person2]
+    tax_units:
+      tax_unit:
+        members: [person1, person2]
+    spm_units:
+      spm_unit:
+        members: [person1, person2]
+    households:
+      household:
+        members: [person1, person2]
+        state_code: MD
+  output:
+    # Imputed federal SSI uses couple_FBR/2 = $1,491 / 2 = $745.50 per
+    # spouse. Combined need per person = 776 + 106 = 882, so Maryland fills
+    # the $136.50 gap for each spouse.
+    ssi_amount_if_eligible: [745.50, 745.50]
+    ssi_countable_income: [0, 0]
+    md_paa_imputed_federal_ssi: [745.50, 745.50]
+    md_paa_eligible: [true, true]
+    md_paa: [136.50, 136.50]
+
+- name: Case 6, person not in PAA facility (NONE) is ineligible.
+  period: 2026-01
+  absolute_error_margin: 0.01
+  input:
+    people:
+      person1:
+        age: 70
+        is_blind: false
+        is_disabled: false
+        immigration_status: CITIZEN
+        ssi_countable_resources: 500
+        employment_income: 0
+        md_paa_living_arrangement: NONE
+    marital_units:
+      marital_unit:
+        members: [person1]
+    tax_units:
+      tax_unit:
+        members: [person1]
+    spm_units:
+      spm_unit:
+        members: [person1]
+    households:
+      household:
+        members: [person1]
+        state_code: MD
+  output:
+    is_ssi_eligible: [true]
+    ssi: [994]
+    md_paa_eligible: [false]
+    md_paa: [0]
+
+- name: Case 7, applicant with only earned income (no SSA receipt) is ineligible.
+  period: 2026-01
+  absolute_error_margin: 0.01
+  input:
+    people:
+      person1:
+        age: 70
+        is_blind: false
+        is_disabled: false
+        immigration_status: CITIZEN
+        ssi_countable_resources: 500
+        ssi: 0
+        social_security: 0
+        social_security_disability: 0
+        employment_income: 36_000  # $3,000/mo
+        md_paa_living_arrangement: CARE_HOME_LEVEL_B
+    marital_units:
+      marital_unit:
+        members: [person1]
+    tax_units:
+      tax_unit:
+        members: [person1]
+    spm_units:
+      spm_unit:
+        members: [person1]
+    households:
+      household:
+        members: [person1]
+        state_code: MD
+  output:
+    # No federal cash benefit (SSI / SSDI / OASI) → PAA-ineligible per
+    # COMAR 07.03.07.03(A)(2).
+    md_paa_eligible: [false]
+    md_paa: [0]
+
+- name: Case 8, SSDI recipient with $1,000/mo SSDI in CARE_HOME_LEVEL_C.
+  period: 2026-01
+  absolute_error_margin: 0.01
+  input:
+    people:
+      person1:
+        age: 60
+        is_blind: false
+        is_disabled: true
+        immigration_status: CITIZEN
+        ssi: 0  # Force off; SSDI alone gates eligibility.
+        ssi_countable_resources: 500
+        social_security_disability: 12_000  # $1,000/mo
+        employment_income: 0
+        md_paa_living_arrangement: CARE_HOME_LEVEL_C
+    marital_units:
+      marital_unit:
+        members: [person1]
+    tax_units:
+      tax_unit:
+        members: [person1]
+    spm_units:
+      spm_unit:
+        members: [person1]
+    households:
+      household:
+        members: [person1]
+        state_code: MD
+  output:
+    md_paa_eligible: [true]
+    # combined = 1173 + 106 = 1279. countable = 1000 - 20 = 980.
+    # Imputed SSI = max(994 - 980, 0) = 14. PAA = 1279 - 980 - 14 = 285.
+    md_paa: [285]
+
+- name: Case 9, asymmetric married couple — only one spouse PAA-eligible.
+  period: 2026-01
+  absolute_error_margin: 0.01
+  input:
+    people:
+      person1:
+        age: 70
+        is_blind: false
+        is_disabled: false
+        immigration_status: CITIZEN
+        ssi: 9_600  # gates eligibility
+        ssi_countable_resources: 1_000
+        employment_income: 0
+        md_paa_living_arrangement: CARE_HOME_LEVEL_C
+      person2:
+        age: 60
+        is_blind: false
+        is_disabled: false
+        immigration_status: CITIZEN
+        ssi: 0
+        ssi_countable_resources: 0
+        employment_income: 0
+        md_paa_living_arrangement: NONE
+    marital_units:
+      marital_unit:
+        members: [person1, person2]
+    tax_units:
+      tax_unit:
+        members: [person1, person2]
+    spm_units:
+      spm_unit:
+        members: [person1, person2]
+    households:
+      household:
+        members: [person1, person2]
+        state_code: MD
+  output:
+    # person2 not in PAA facility → ineligible. person1 eligible via SSI.
+    # person1 cascade: combined = 1173 + 106 = 1279. ssi_amount_if_eligible
+    # for an aged spouse paired with a non-ABD spouse falls back to the
+    # individual FBR ($994). Own SSI receipt is excluded from
+    # ssi_countable_income by design, so countable = 0 and imputed SSI =
+    # 994. PAA = 1279 - 994 = 285. Locked intermediates below
+    # guard against regressions in either assumption. Note:
+    # ssi_amount_if_eligible returns the maximum federal SSI amount a
+    # person *would* receive if categorically eligible; it does not gate
+    # on receipt, so person2 also returns $994.
+    ssi_amount_if_eligible: [994, 994]
+    ssi_countable_income: [0, 0]
+    md_paa_imputed_federal_ssi: [994, 0]
+    md_paa_eligible: [true, false]
+    md_paa_provider_rate: [1_173, 0]
+    md_paa_personal_needs_allowance: [106, 0]
+    md_paa: [285, 0]
+
+- name: Case 10, married couple with asymmetric living arrangements (CARE Home A vs C).
+  period: 2026-01
+  absolute_error_margin: 0.01
+  input:
+    people:
+      person1:
+        age: 70
+        is_blind: false
+        is_disabled: false
+        immigration_status: CITIZEN
+        ssi_countable_resources: 1_000
+        employment_income: 0
+        md_paa_living_arrangement: CARE_HOME_LEVEL_A
+      person2:
+        age: 68
+        is_blind: false
+        is_disabled: false
+        immigration_status: CITIZEN
+        ssi_countable_resources: 1_000
+        employment_income: 0
+        md_paa_living_arrangement: CARE_HOME_LEVEL_C
+    marital_units:
+      marital_unit:
+        members: [person1, person2]
+    tax_units:
+      tax_unit:
+        members: [person1, person2]
+    spm_units:
+      spm_unit:
+        members: [person1, person2]
+    households:
+      household:
+        members: [person1, person2]
+        state_code: MD
+  output:
+    # Imputed federal SSI uses couple_FBR/2 = $745.50 per spouse.
+    # Per-person cascade:
+    #   person1 (CARE_HOME_LEVEL_A): combined = 776 + 106 = 882;
+    #     PAA = 882 - 745.50 = 136.50.
+    #   person2 (CARE_HOME_LEVEL_C): combined = 1173 + 106 = 1279;
+    #     PAA = 1279 - 745.50 = 533.50.
+    # Verifies per-person evaluation produces different PAA amounts within
+    # one marital unit.
+    ssi_amount_if_eligible: [745.50, 745.50]
+    ssi_countable_income: [0, 0]
+    md_paa_imputed_federal_ssi: [745.50, 745.50]
+    md_paa_eligible: [true, true]
+    md_paa: [136.50, 533.50]
+
+- name: Case 11, OASI recipient who is not aged/blind/disabled is PAA-ineligible.
+  period: 2026-01
+  absolute_error_margin: 0.01
+  input:
+    people:
+      person1:
+        age: 50  # Not aged, not blind, not disabled.
+        is_blind: false
+        is_disabled: false
+        immigration_status: CITIZEN
+        ssi: 0
+        social_security: 12_000  # $1,000/mo OASI (e.g., survivor benefits)
+        social_security_disability: 0
+        ssi_countable_resources: 500
+        employment_income: 0
+        md_paa_living_arrangement: CARE_HOME_LEVEL_B
+    marital_units:
+      marital_unit:
+        members: [person1]
+    tax_units:
+      tax_unit:
+        members: [person1]
+    spm_units:
+      spm_unit:
+        members: [person1]
+    households:
+      household:
+        members: [person1]
+        state_code: MD
+  output:
+    # COMAR 07.03.07.03(A)(2): OASI receipt qualifies a person ONLY if
+    # they also meet aged/blind/disabled. A 50-year-old surviving spouse
+    # is not categorically qualifying, so PAA must reject — exercises
+    # the `(social_security > 0) & is_categorically_qualifying` branch
+    # of md_paa_eligible separately from Case 7's no-federal-benefit case.
+    md_paa_eligible: [false]
+    md_paa: [0]
+
+- name: Case 12, aged OASI recipient with $1,000/mo OASI in CARE_HOME_LEVEL_C — positive PAA via OASI pathway.
+  period: 2026-01
+  absolute_error_margin: 0.01
+  input:
+    people:
+      person1:
+        age: 70  # Categorically aged → OASI receipt qualifies for PAA.
+        is_blind: false
+        is_disabled: false
+        immigration_status: CITIZEN
+        ssi: 0
+        social_security: 12_000  # $1,000/mo OASI
+        social_security_disability: 0
+        ssi_countable_resources: 500
+        employment_income: 0
+        md_paa_living_arrangement: CARE_HOME_LEVEL_C
+    marital_units:
+      marital_unit:
+        members: [person1]
+    tax_units:
+      tax_unit:
+        members: [person1]
+    spm_units:
+      spm_unit:
+        members: [person1]
+    households:
+      household:
+        members: [person1]
+        state_code: MD
+  output:
+    md_paa_eligible: [true]
+    # combined = 1173 + 106 = 1279. countable = 1000 - 20 = 980.
+    # Imputed SSI = max(994 - 980, 0) = 14. PAA = 1279 - 980 - 14 = 285.
+    md_paa: [285]
+
+- name: Case 13, married couple both SSI-eligible in CARE_HOME_LEVEL_C — symmetric positive output.
+  period: 2026-01
+  absolute_error_margin: 0.01
+  input:
+    people:
+      person1:
+        age: 70
+        is_blind: false
+        is_disabled: false
+        immigration_status: CITIZEN
+        ssi_countable_resources: 1_000
+        employment_income: 0
+        md_paa_living_arrangement: CARE_HOME_LEVEL_C
+      person2:
+        age: 68
+        is_blind: false
+        is_disabled: false
+        immigration_status: CITIZEN
+        ssi_countable_resources: 1_000
+        employment_income: 0
+        md_paa_living_arrangement: CARE_HOME_LEVEL_C
+    marital_units:
+      marital_unit:
+        members: [person1, person2]
+    tax_units:
+      tax_unit:
+        members: [person1, person2]
+    spm_units:
+      spm_unit:
+        members: [person1, person2]
+    households:
+      household:
+        members: [person1, person2]
+        state_code: MD
+  output:
+    # Imputed federal SSI uses couple_FBR/2 = $745.50 per spouse.
+    # combined per spouse = 1173 + 106 = 1279, so PAA = 533.50 each.
+    # Both spouses receive a positive PAA — verifies the symmetric path.
+    md_paa_eligible: [true, true]
+    md_paa_imputed_federal_ssi: [745.50, 745.50]
+    md_paa: [533.50, 533.50]
+
+- name: Case 14, pending §300.5 applicant with no income in CARE_HOME_LEVEL_C — positive PAA.
+  period: 2026-01
+  absolute_error_margin: 0.01
+  input:
+    people:
+      person1:
+        age: 70  # Categorically aged.
+        is_blind: false
+        is_disabled: false
+        immigration_status: CITIZEN
+        ssi: 0
+        social_security: 0
+        social_security_disability: 0
+        ssi_countable_resources: 1_000
+        employment_income: 0
+        md_paa_living_arrangement: CARE_HOME_LEVEL_C
+        md_paa_pending_federal_benefit: true
+    marital_units:
+      marital_unit:
+        members: [person1]
+    tax_units:
+      tax_unit:
+        members: [person1]
+    spm_units:
+      spm_unit:
+        members: [person1]
+    households:
+      household:
+        members: [person1]
+        state_code: MD
+  output:
+    # Pending pathway gates eligibility; cascade then runs normally.
+    # combined = 1173 + 106 = 1279. imputed SSI = 994.
+    # countable = 0. PAA = 285.
+    md_paa_eligible: [true]
+    md_paa: [285]
diff --git a/policyengine_us/tests/policy/baseline/gov/states/md/dhs/fia/paa/md_paa.yaml b/policyengine_us/tests/policy/baseline/gov/states/md/dhs/fia/paa/md_paa.yaml
new file mode 100644
index 00000000000..6cc5fa1df87
--- /dev/null
+++ b/policyengine_us/tests/policy/baseline/gov/states/md/dhs/fia/paa/md_paa.yaml
@@ -0,0 +1,191 @@
+# Tests for md_paa main benefit variable.
+# Formula (prospective SSI cascade):
+#   paa = max(combined_need - ssi_countable_income - imputed_federal_ssi, 0)
+# REHAB residents impute the $30 federal SSI medical-facility rate.
+# 2026 federal SSI individual FBR = $994; PNA = $106.
+
+- name: Case 1, CARE_HOME_LEVEL_B with only SSI — federal SSI exceeds combined need.
+  period: 2026-01
+  absolute_error_margin: 0.01
+  input:
+    people:
+      person1:
+        age: 70
+        ssi: 9_600  # gates eligibility
+        ssi_earned_income: 0
+        ssi_unearned_income: 0
+        ssi_countable_resources: 1_000
+        md_paa_living_arrangement: CARE_HOME_LEVEL_B
+    households:
+      household:
+        members: [person1]
+        state_code: MD
+  output:
+    # combined_need = 875 + 106 = 981. imputed SSI = 994. PAA = 0.
+    md_paa: 0
+
+- name: Case 2, REHAB_RESIDENCE with only SSI receives state-funded gap to PNA.
+  period: 2026-01
+  absolute_error_margin: 0.01
+  input:
+    people:
+      person1:
+        age: 70
+        ssi: 9_600
+        ssi_earned_income: 0
+        ssi_unearned_income: 0
+        ssi_countable_resources: 1_000
+        md_paa_living_arrangement: REHAB_RESIDENCE
+        # MDH rehab residents are SSI medical-treatment-facility recipients
+        # (federal SSI capped at $30/mo). md_paa_eligible requires both flags.
+        ssi_lives_in_medical_treatment_facility: true
+        ssi_medicaid_pays_majority_of_care: true
+    households:
+      household:
+        members: [person1]
+        state_code: MD
+  output:
+    # combined_need = 0 + 106 = 106. imputed SSI = $30. PAA = 76.
+    md_paa: 76
+
+- name: Case 3, ineligible (NONE living arrangement).
+  period: 2026-01
+  absolute_error_margin: 0.01
+  input:
+    people:
+      person1:
+        age: 70
+        ssi: 9_600
+        ssi_countable_resources: 1_000
+        md_paa_living_arrangement: NONE
+    households:
+      household:
+        members: [person1]
+        state_code: MD
+  output:
+    md_paa: 0
+
+- name: Case 4, CARE_HOME_LEVEL_C SSI-only — state fills gap above federal.
+  period: 2026-01
+  absolute_error_margin: 0.01
+  input:
+    people:
+      person1:
+        age: 70
+        ssi: 9_600
+        ssi_earned_income: 0
+        ssi_unearned_income: 0
+        ssi_countable_resources: 1_000
+        md_paa_living_arrangement: CARE_HOME_LEVEL_C
+    households:
+      household:
+        members: [person1]
+        state_code: MD
+  output:
+    # combined_need = 1173 + 106 = 1279. imputed SSI = 994. PAA = 285.
+    md_paa: 285
+
+- name: Case 5, negative earned income does not inflate benefit.
+  period: 2026-01
+  absolute_error_margin: 0.01
+  input:
+    people:
+      person1:
+        age: 70
+        ssi: 9_600
+        # Self-employment loss should not reduce countable income below zero.
+        self_employment_income: -60_000_000
+        ssi_countable_resources: 1_000
+        md_paa_living_arrangement: CARE_HOME_LEVEL_C
+    households:
+      household:
+        members: [person1]
+        state_code: MD
+  output:
+    # ssi_countable_income floors at 0 by design.
+    # imputed SSI = 994. PAA = 1279 - 994 = 285.
+    md_paa: 285
+
+- name: Case 6, out-of-state recipient is ineligible.
+  period: 2026-01
+  absolute_error_margin: 0.01
+  input:
+    people:
+      person1:
+        age: 70
+        ssi: 9_600
+        ssi_countable_resources: 1_000
+        md_paa_living_arrangement: CARE_HOME_LEVEL_B
+    households:
+      household:
+        members: [person1]
+        state_code: MA
+  output:
+    md_paa: 0
+
+- name: Case 7, high-income REHAB recipient — income exhausts federal then state.
+  period: 2026-01
+  absolute_error_margin: 0.01
+  input:
+    people:
+      person1:
+        age: 70
+        ssi: 9_600
+        # $2,500/mo non-SSI unearned * 12 = $30,000/yr.
+        social_security: 30_000
+        ssi_countable_resources: 1_000
+        md_paa_living_arrangement: REHAB_RESIDENCE
+        ssi_lives_in_medical_treatment_facility: true
+        ssi_medicaid_pays_majority_of_care: true
+    households:
+      household:
+        members: [person1]
+        state_code: MD
+  output:
+    # combined = 106. countable = 2500 - 20 = 2480.
+    # imputed SSI = 0 because countable income exceeds the $30 medical rate.
+    # PAA = max(106 - 2480, 0) = 0.
+    md_paa: 0
+
+- name: Case 8, CARE_HOME_LEVEL_D recipient gets the largest state supplement.
+  period: 2026-01
+  absolute_error_margin: 0.01
+  input:
+    people:
+      person1:
+        age: 70
+        ssi: 9_600
+        ssi_countable_resources: 1_000
+        md_paa_living_arrangement: CARE_HOME_LEVEL_D
+    households:
+      household:
+        members: [person1]
+        state_code: MD
+  output:
+    # combined_need = 1376 + 106 = 1482. imputed SSI = 994. PAA = 488.
+    md_paa: 488
+
+# Partial-erosion case: countable income exceeds the imputed medical-facility
+# SSI amount but does not fully exhaust the PNA.
+- name: Case 9, REHAB recipient with $80/mo unearned — partial state erosion.
+  period: 2026-01
+  absolute_error_margin: 0.01
+  input:
+    people:
+      person1:
+        age: 70
+        ssi: 9_600  # gates eligibility
+        social_security: 960  # $80/mo unearned (in addition to medical SSI)
+        ssi_countable_resources: 1_000
+        md_paa_living_arrangement: REHAB_RESIDENCE
+        ssi_lives_in_medical_treatment_facility: true
+        ssi_medicaid_pays_majority_of_care: true
+    households:
+      household:
+        members: [person1]
+        state_code: MD
+  output:
+    # countable monthly = 80 - 20 (general exclusion) = 60.
+    # imputed SSI = max(30 - 60, 0) = 0.
+    # PAA = max(106 - 60, 0) = 46. Partial reduction (not zero).
+    md_paa: 46
diff --git a/policyengine_us/tests/policy/baseline/gov/states/md/dhs/fia/paa/md_paa_eligible.yaml b/policyengine_us/tests/policy/baseline/gov/states/md/dhs/fia/paa/md_paa_eligible.yaml
new file mode 100644
index 00000000000..e07bb4dfb20
--- /dev/null
+++ b/policyengine_us/tests/policy/baseline/gov/states/md/dhs/fia/paa/md_paa_eligible.yaml
@@ -0,0 +1,370 @@
+# Tests for md_paa_eligible variable.
+# Eligibility requires:
+#   - state_code = MD (defined_for filter)
+#   - ssi > 0 OR social_security_disability > 0 OR (oasi > 0 AND aged/blind/
+#     disabled) OR pending §300.5 application (federal cash benefit per
+#     COMAR 07.03.07.03(A)(2))
+#   - ssi_countable_resources <= $2,000 (parity with federal SSI per
+#     PAA Manual §500)
+#   - md_paa_living_arrangement != NONE (PAA Manual §300.3, §300.4)
+#   - REHAB ⇄ ssi_lives_in_medical_treatment_facility consistency
+
+- name: Case 1, SSI recipient in CARE_HOME_LEVEL_B in Maryland is eligible.
+  period: 2025-01
+  input:
+    people:
+      person1:
+        age: 70
+        ssi: 9_600  # $800/mo SSI as input (YEAR-defined)
+        ssi_countable_resources: 1_000
+        md_paa_living_arrangement: CARE_HOME_LEVEL_B
+    households:
+      household:
+        members: [person1]
+        state_code: MD
+  output:
+    md_paa_eligible: true
+
+- name: Case 2, no living arrangement (NONE) is ineligible.
+  period: 2025-01
+  input:
+    people:
+      person1:
+        age: 70
+        ssi: 9_600
+        ssi_countable_resources: 1_000
+        md_paa_living_arrangement: NONE
+    households:
+      household:
+        members: [person1]
+        state_code: MD
+  output:
+    md_paa_eligible: false
+
+- name: Case 3, no SSI or SSDI receipt is ineligible.
+  period: 2025-01
+  input:
+    people:
+      person1:
+        age: 70
+        ssi: 0
+        social_security_disability: 0
+        ssi_countable_resources: 1_000
+        md_paa_living_arrangement: CARE_HOME_LEVEL_B
+    households:
+      household:
+        members: [person1]
+        state_code: MD
+  output:
+    md_paa_eligible: false
+
+- name: Case 4, out-of-state resident is ineligible.
+  period: 2025-01
+  input:
+    people:
+      person1:
+        age: 70
+        ssi: 9_600
+        ssi_countable_resources: 1_000
+        md_paa_living_arrangement: CARE_HOME_LEVEL_B
+    households:
+      household:
+        members: [person1]
+        state_code: MA
+  output:
+    md_paa_eligible: false
+
+# Per COMAR 07.03.07.03(A)(2), applicants who receive SSDI (without SSI)
+# on the basis of disability are also PAA-eligible.
+- name: Case 5, SSDI-only recipient is eligible.
+  period: 2025-01
+  input:
+    people:
+      person1:
+        age: 60
+        ssi: 0
+        social_security_disability: 12_000  # $1,000/mo SSDI
+        ssi_countable_resources: 500
+        md_paa_living_arrangement: CARE_HOME_LEVEL_B
+    households:
+      household:
+        members: [person1]
+        state_code: MD
+  output:
+    md_paa_eligible: true
+
+# Per PAA Manual §500, the $2,000 SSI resource limit applies. Verify
+# the resource gate is enforced independently of SSI receipt.
+- name: Case 6, resources above $2,000 limit are ineligible.
+  period: 2025-01
+  input:
+    people:
+      person1:
+        age: 70
+        ssi: 9_600
+        ssi_countable_resources: 3_000
+        md_paa_living_arrangement: CARE_HOME_LEVEL_B
+    households:
+      household:
+        members: [person1]
+        state_code: MD
+  output:
+    md_paa_eligible: false
+
+# A person with only earned income (no SSI, SSDI, or OASI receipt) cannot
+# qualify for PAA, even if otherwise in a PAA facility — PAA requires
+# receipt of a federal cash benefit on the basis of age/blindness/
+# disability per COMAR 07.03.07.03(A)(2).
+- name: Case 7, no federal cash benefit receipt is PAA-ineligible.
+  period: 2025-01
+  input:
+    people:
+      person1:
+        age: 70
+        is_blind: false
+        is_disabled: false
+        immigration_status: CITIZEN
+        ssi: 0
+        social_security: 0
+        social_security_disability: 0
+        employment_income: 36_000  # $3,000/mo earned income
+        ssi_countable_resources: 500
+        md_paa_living_arrangement: CARE_HOME_LEVEL_B
+    marital_units:
+      marital_unit:
+        members: [person1]
+    tax_units:
+      tax_unit:
+        members: [person1]
+    spm_units:
+      spm_unit:
+        members: [person1]
+    households:
+      household:
+        members: [person1]
+        state_code: MD
+  output:
+    md_paa_eligible: false
+
+# Per PAA Manual §300.5 / COMAR 07.03.07.03, applicants in protected living
+# arrangements remain eligible while a federal cash benefit application is
+# pending or while a no-fault denial is being appealed, provided they meet
+# the categorical aged/blind/disabled requirement.
+- name: Case 8, pending SSI applicant who is aged is PAA-eligible.
+  period: 2025-01
+  input:
+    people:
+      person1:
+        age: 70  # Categorically aged.
+        is_blind: false
+        is_disabled: false
+        immigration_status: CITIZEN
+        ssi: 0
+        social_security: 0
+        social_security_disability: 0
+        ssi_countable_resources: 500
+        md_paa_living_arrangement: CARE_HOME_LEVEL_B
+        md_paa_pending_federal_benefit: true
+    households:
+      household:
+        members: [person1]
+        state_code: MD
+  output:
+    md_paa_eligible: true
+
+- name: Case 9, pending applicant not categorically aged/blind/disabled is ineligible.
+  period: 2025-01
+  input:
+    people:
+      person1:
+        age: 40  # Not aged, not blind, not disabled.
+        is_blind: false
+        is_disabled: false
+        immigration_status: CITIZEN
+        ssi: 0
+        social_security: 0
+        social_security_disability: 0
+        ssi_countable_resources: 500
+        md_paa_living_arrangement: CARE_HOME_LEVEL_B
+        md_paa_pending_federal_benefit: true
+    households:
+      household:
+        members: [person1]
+        state_code: MD
+  output:
+    md_paa_eligible: false
+
+# Resource limit boundary: PAA Manual §500 caps at $2,000 (federal SSI
+# individual limit). Confirm the boundary applies inclusively at $2,000
+# and excludes $2,001 — guards against off-by-one regressions if the
+# parameter or comparison operator ever changes.
+- name: Case 10, resources exactly at $2,000 limit are eligible.
+  period: 2025-01
+  input:
+    people:
+      person1:
+        age: 70
+        ssi: 9_600
+        ssi_countable_resources: 2_000
+        md_paa_living_arrangement: CARE_HOME_LEVEL_B
+    households:
+      household:
+        members: [person1]
+        state_code: MD
+  output:
+    md_paa_eligible: true
+
+- name: Case 11, resources at $2,001 (one dollar over limit) are ineligible.
+  period: 2025-01
+  input:
+    people:
+      person1:
+        age: 70
+        ssi: 9_600
+        ssi_countable_resources: 2_001
+        md_paa_living_arrangement: CARE_HOME_LEVEL_B
+    households:
+      household:
+        members: [person1]
+        state_code: MD
+  output:
+    md_paa_eligible: false
+
+# §300.5 pending pathway: confirms all three categorical gates (aged,
+# blind, disabled) admit a pending applicant. Case 8 covers aged; these
+# cover the other two so a regression in one branch isn't masked.
+- name: Case 12, pending applicant who is blind is PAA-eligible.
+  period: 2025-01
+  input:
+    people:
+      person1:
+        age: 50  # Not aged.
+        is_blind: true  # Categorically qualifying via blindness.
+        is_disabled: false
+        immigration_status: CITIZEN
+        ssi: 0
+        social_security: 0
+        social_security_disability: 0
+        ssi_countable_resources: 500
+        md_paa_living_arrangement: CARE_HOME_LEVEL_B
+        md_paa_pending_federal_benefit: true
+    households:
+      household:
+        members: [person1]
+        state_code: MD
+  output:
+    md_paa_eligible: true
+
+- name: Case 13, pending applicant who is disabled is PAA-eligible.
+  period: 2025-01
+  input:
+    people:
+      person1:
+        age: 50  # Not aged.
+        is_blind: false
+        is_disabled: true  # Categorically qualifying via disability.
+        immigration_status: CITIZEN
+        ssi: 0
+        social_security: 0
+        social_security_disability: 0
+        ssi_countable_resources: 500
+        md_paa_living_arrangement: CARE_HOME_LEVEL_B
+        md_paa_pending_federal_benefit: true
+    households:
+      household:
+        members: [person1]
+        state_code: MD
+  output:
+    md_paa_eligible: true
+
+# Per COMAR 07.03.07.03(A)(2), OASI receipt qualifies a person ONLY if
+# they are also aged/blind/disabled. A 50-year-old surviving spouse
+# drawing Social Security survivor benefits is not categorically
+# qualifying and must be rejected, even though `social_security > 0`.
+- name: Case 14, OASI recipient who is not aged/blind/disabled is ineligible.
+  period: 2025-01
+  input:
+    people:
+      person1:
+        age: 50  # Not aged.
+        is_blind: false
+        is_disabled: false
+        immigration_status: CITIZEN
+        ssi: 0
+        social_security: 12_000  # $1,000/mo OASI (e.g., survivor benefits)
+        social_security_disability: 0
+        ssi_countable_resources: 500
+        md_paa_living_arrangement: CARE_HOME_LEVEL_B
+    households:
+      household:
+        members: [person1]
+        state_code: MD
+  output:
+    md_paa_eligible: false
+
+# Confirm the $2,000 resource gate still applies on the §300.5 pending
+# pathway — eligibility short-circuits regardless of which qualification
+# route the applicant uses.
+- name: Case 15, pending applicant with resources above $2,000 limit is ineligible.
+  period: 2025-01
+  input:
+    people:
+      person1:
+        age: 70  # Categorically aged.
+        is_blind: false
+        is_disabled: false
+        immigration_status: CITIZEN
+        ssi: 0
+        social_security: 0
+        social_security_disability: 0
+        ssi_countable_resources: 5_000  # Over the $2,000 SSI limit.
+        md_paa_living_arrangement: CARE_HOME_LEVEL_B
+        md_paa_pending_federal_benefit: true
+    households:
+      household:
+        members: [person1]
+        state_code: MD
+  output:
+    md_paa_eligible: false
+
+# Bidirectional REHAB / SSI medical-facility consistency gate: REHAB
+# without the SSI flags set is ineligible (federal SSI would not be
+# capped at $30/mo upstream, producing a wrong cascade).
+- name: Case 16, REHAB recipient without SSI medical-facility flags is ineligible.
+  period: 2026-01
+  input:
+    people:
+      person1:
+        age: 70
+        ssi: 9_600
+        ssi_countable_resources: 1_000
+        md_paa_living_arrangement: REHAB_RESIDENCE
+        # ssi_lives_in_medical_treatment_facility intentionally NOT set.
+        # ssi_medicaid_pays_majority_of_care intentionally NOT set.
+    households:
+      household:
+        members: [person1]
+        state_code: MD
+  output:
+    md_paa_eligible: false
+
+# Bidirectional gate (other direction): CARE Home recipient with the
+# SSI medical-facility flag accidentally set is ineligible — federal
+# SSI would be capped at $30/mo upstream, producing a wrong cascade.
+- name: Case 17, CARE Home recipient with SSI medical-facility flag set is ineligible.
+  period: 2026-01
+  input:
+    people:
+      person1:
+        age: 70
+        ssi: 9_600
+        ssi_countable_resources: 1_000
+        md_paa_living_arrangement: CARE_HOME_LEVEL_C
+        ssi_lives_in_medical_treatment_facility: true
+        ssi_medicaid_pays_majority_of_care: true
+    households:
+      household:
+        members: [person1]
+        state_code: MD
+  output:
+    md_paa_eligible: false
diff --git a/policyengine_us/tests/policy/baseline/gov/states/md/dhs/fia/paa/md_paa_imputed_federal_ssi.yaml b/policyengine_us/tests/policy/baseline/gov/states/md/dhs/fia/paa/md_paa_imputed_federal_ssi.yaml
new file mode 100644
index 00000000000..9d85205b49d
--- /dev/null
+++ b/policyengine_us/tests/policy/baseline/gov/states/md/dhs/fia/paa/md_paa_imputed_federal_ssi.yaml
@@ -0,0 +1,89 @@
+# Tests for md_paa_imputed_federal_ssi.
+# Formula: max(uncapped_ssi, 0), gated by Maryland PAA eligibility.
+
+- name: Case 1, SSI-eligible CARE Home applicant with no income imputes full individual SSI.
+  period: 2026-01
+  absolute_error_margin: 0.01
+  input:
+    people:
+      person1:
+        age: 70
+        is_blind: false
+        is_disabled: false
+        immigration_status: CITIZEN
+        ssi_countable_resources: 1_000
+        md_paa_living_arrangement: CARE_HOME_LEVEL_C
+    households:
+      household:
+        members: [person1]
+        state_code: MD
+  output:
+    ssi_countable_income: 0
+    md_paa_imputed_federal_ssi: 994
+
+- name: Case 2, OASI income reduces imputed federal SSI dollar-for-dollar after disregard.
+  period: 2026-01
+  absolute_error_margin: 0.01
+  input:
+    people:
+      person1:
+        age: 70
+        is_blind: false
+        is_disabled: false
+        immigration_status: CITIZEN
+        ssi: 0
+        social_security: 12_000
+        social_security_disability: 0
+        ssi_countable_resources: 1_000
+        md_paa_living_arrangement: CARE_HOME_LEVEL_C
+    households:
+      household:
+        members: [person1]
+        state_code: MD
+  output:
+    # $1,000/mo OASI - $20 general exclusion = $980 countable.
+    # Imputed federal SSI = max(994 - 980, 0) = 14.
+    ssi_countable_income: 980
+    md_paa_imputed_federal_ssi: 14
+
+- name: Case 3, income above the federal SSI amount imputes no federal SSI.
+  period: 2026-01
+  absolute_error_margin: 0.01
+  input:
+    people:
+      person1:
+        age: 60
+        is_blind: false
+        is_disabled: true
+        immigration_status: CITIZEN
+        ssi: 0
+        social_security_disability: 30_000
+        ssi_countable_resources: 1_000
+        md_paa_living_arrangement: CARE_HOME_LEVEL_C
+    households:
+      household:
+        members: [person1]
+        state_code: MD
+  output:
+    md_paa_eligible: true
+    md_paa_imputed_federal_ssi: 0
+
+- name: Case 4, ineligible applicant has no imputed federal SSI.
+  period: 2026-01
+  absolute_error_margin: 0.01
+  input:
+    people:
+      person1:
+        age: 70
+        is_blind: false
+        is_disabled: false
+        immigration_status: CITIZEN
+        ssi_countable_resources: 1_000
+        md_paa_living_arrangement: NONE
+    households:
+      household:
+        members: [person1]
+        state_code: MD
+  output:
+    md_paa_eligible: false
+    md_paa_imputed_federal_ssi: 0
diff --git a/policyengine_us/tests/policy/baseline/gov/states/md/dhs/fia/paa/md_paa_personal_needs_allowance.yaml b/policyengine_us/tests/policy/baseline/gov/states/md/dhs/fia/paa/md_paa_personal_needs_allowance.yaml
new file mode 100644
index 00000000000..2e9346bef14
--- /dev/null
+++ b/policyengine_us/tests/policy/baseline/gov/states/md/dhs/fia/paa/md_paa_personal_needs_allowance.yaml
@@ -0,0 +1,111 @@
+# Tests for md_paa_personal_needs_allowance variable.
+# Tests parameter values across the timeline (test runner only supports
+# January or whole-year periods, so mid-year transitions are checked via
+# year-over-year January tests):
+# 2009-01-01: $82  (COMAR 07.03.07.04(A)(1); forward-fills until 2022-01-01)
+# 2022-01-01: $84  (AT 22-09 FFY22 COLA Mass Mod)
+# 2022-07-01: $93  (AT 22-28)
+# 2023-07-01: $98  (IM 24-05 June 2023 Mass Modification; appears in 2024-01)
+# 2024-07-01: $102 (originating transmittal not located; value corroborated
+#                   by IM 26-04 saying "$102 → $106"; appears in 2025-01)
+# 2025-07-01: $106 (IM 26-04 page 2; appears in 2026-01)
+
+- name: Case 1, 2011 January PNA is $82 (codified in COMAR 07.03.07.04(A)(1)).
+  period: 2011-01
+  absolute_error_margin: 0.01
+  input:
+    people:
+      person1:
+        ssi: 9_600
+        ssi_countable_resources: 1_000
+        md_paa_living_arrangement: CARE_HOME_LEVEL_B
+    households:
+      household:
+        members: [person1]
+        state_code: MD
+  output:
+    md_paa_personal_needs_allowance: 82
+
+- name: Case 2, 2022 January PNA is $84 (AT 22-09 FFY22 COLA Mass Mod).
+  period: 2022-01
+  absolute_error_margin: 0.01
+  input:
+    people:
+      person1:
+        ssi: 9_600
+        ssi_countable_resources: 1_000
+        md_paa_living_arrangement: CARE_HOME_LEVEL_B
+    households:
+      household:
+        members: [person1]
+        state_code: MD
+  output:
+    # AT 22-09 raised PNA from $82 to $84 effective 2022-01-01,
+    # then AT 22-28 raised it to $93 on 2022-07-01.
+    md_paa_personal_needs_allowance: 84
+
+- name: Case 3, 2023 PNA reflects $93 (post AT 22-28).
+  period: 2023-01
+  absolute_error_margin: 0.01
+  input:
+    people:
+      person1:
+        ssi: 9_600  # gates md_paa_eligible
+        ssi_countable_resources: 1_000
+        md_paa_living_arrangement: CARE_HOME_LEVEL_B
+    households:
+      household:
+        members: [person1]
+        state_code: MD
+  output:
+    md_paa_personal_needs_allowance: 93
+
+- name: Case 4, 2024 January PNA reflects $98 (effective 2023-07-01 per Information Memo 24-05).
+  period: 2024-01
+  absolute_error_margin: 0.01
+  input:
+    people:
+      person1:
+        ssi: 9_600
+        ssi_countable_resources: 1_000
+        md_paa_living_arrangement: CARE_HOME_LEVEL_B
+    households:
+      household:
+        members: [person1]
+        state_code: MD
+  output:
+    md_paa_personal_needs_allowance: 98
+
+- name: Case 5, 2025 January PNA reflects $102 (effective 2024-07-01 placeholder).
+  period: 2025-01
+  absolute_error_margin: 0.01
+  input:
+    people:
+      person1:
+        ssi: 9_600
+        ssi_countable_resources: 1_000
+        md_paa_living_arrangement: CARE_HOME_LEVEL_B
+    households:
+      household:
+        members: [person1]
+        state_code: MD
+  output:
+    # Parameter sets $102 effective 2024-07-01; the originating transmittal
+    # has not been located, so the date is a placeholder.
+    md_paa_personal_needs_allowance: 102
+
+- name: Case 6, 2026 January PNA reflects $106 (post IM 26-04).
+  period: 2026-01
+  absolute_error_margin: 0.01
+  input:
+    people:
+      person1:
+        ssi: 9_600
+        ssi_countable_resources: 1_000
+        md_paa_living_arrangement: CARE_HOME_LEVEL_B
+    households:
+      household:
+        members: [person1]
+        state_code: MD
+  output:
+    md_paa_personal_needs_allowance: 106
diff --git a/policyengine_us/tests/policy/baseline/gov/states/md/dhs/fia/paa/md_paa_provider_rate.yaml b/policyengine_us/tests/policy/baseline/gov/states/md/dhs/fia/paa/md_paa_provider_rate.yaml
new file mode 100644
index 00000000000..9697f753e14
--- /dev/null
+++ b/policyengine_us/tests/policy/baseline/gov/states/md/dhs/fia/paa/md_paa_provider_rate.yaml
@@ -0,0 +1,178 @@
+# Tests for md_paa_provider_rate variable.
+# Rate is determined by md_paa_living_arrangement enum.
+# Each tier has at least one test (per testing-patterns: every dimension value).
+# Current rates effective 2018-01-01 onwards (per AT 18-11; unchanged through
+# every subsequent COLA Mass Mod including AT 23-02).
+
+- name: Case 1, CARE_HOME_LEVEL_A.
+  period: 2025-01
+  absolute_error_margin: 0.01
+  input:
+    people:
+      person1:
+        ssi: 9_600  # gates md_paa_eligible (defined_for on this variable)
+        md_paa_living_arrangement: CARE_HOME_LEVEL_A
+    households:
+      household:
+        members: [person1]
+        state_code: MD
+  output:
+    md_paa_provider_rate: 776
+
+- name: Case 2, CARE_HOME_LEVEL_B.
+  period: 2025-01
+  absolute_error_margin: 0.01
+  input:
+    people:
+      person1:
+        ssi: 9_600  # gates md_paa_eligible (defined_for on this variable)
+        md_paa_living_arrangement: CARE_HOME_LEVEL_B
+    households:
+      household:
+        members: [person1]
+        state_code: MD
+  output:
+    md_paa_provider_rate: 875
+
+- name: Case 3, CARE_HOME_LEVEL_C.
+  period: 2025-01
+  absolute_error_margin: 0.01
+  input:
+    people:
+      person1:
+        ssi: 9_600  # gates md_paa_eligible (defined_for on this variable)
+        md_paa_living_arrangement: CARE_HOME_LEVEL_C
+    households:
+      household:
+        members: [person1]
+        state_code: MD
+  output:
+    md_paa_provider_rate: 1_173
+
+- name: Case 4, CARE_HOME_LEVEL_D.
+  period: 2025-01
+  absolute_error_margin: 0.01
+  input:
+    people:
+      person1:
+        ssi: 9_600  # gates md_paa_eligible (defined_for on this variable)
+        md_paa_living_arrangement: CARE_HOME_LEVEL_D
+    households:
+      household:
+        members: [person1]
+        state_code: MD
+  output:
+    md_paa_provider_rate: 1_376
+
+- name: Case 5, ASSISTED_LIVING.
+  period: 2025-01
+  absolute_error_margin: 0.01
+  input:
+    people:
+      person1:
+        ssi: 9_600  # gates md_paa_eligible (defined_for on this variable)
+        md_paa_living_arrangement: ASSISTED_LIVING
+    households:
+      household:
+        members: [person1]
+        state_code: MD
+  output:
+    md_paa_provider_rate: 894
+
+- name: Case 6, REHAB_RESIDENCE provider rate is zero.
+  period: 2025-01
+  absolute_error_margin: 0.01
+  input:
+    people:
+      person1:
+        ssi: 9_600  # gates md_paa_eligible (defined_for on this variable)
+        md_paa_living_arrangement: REHAB_RESIDENCE
+    households:
+      household:
+        members: [person1]
+        state_code: MD
+  output:
+    # Per PAA Manual §400 and §900.3, MDH pays the provider directly for
+    # Rehabilitative Residence cases, so PAA's provider rate is zero. PAA
+    # contributes only the personal needs allowance.
+    md_paa_provider_rate: 0
+
+- name: Case 7, NONE living arrangement returns zero.
+  period: 2025-01
+  absolute_error_margin: 0.01
+  input:
+    people:
+      person1:
+        md_paa_living_arrangement: NONE
+    households:
+      household:
+        members: [person1]
+        state_code: MD
+  output:
+    md_paa_provider_rate: 0
+
+# Pre-2018 dates use the COMAR 07.03.07.04(B)(2)/(C)(2) "Effective
+# January 1, 2009" schedule. Values forward-fill from 2009 until the
+# 2018 update first documented in AT 18-11.
+- name: Case 8, pre-2018 period uses COMAR 2009 CARE_HOME_LEVEL_C rate.
+  period: 2010-01
+  absolute_error_margin: 0.01
+  input:
+    people:
+      person1:
+        ssi: 9_600  # gates md_paa_eligible (defined_for on this variable)
+        md_paa_living_arrangement: CARE_HOME_LEVEL_C
+    households:
+      household:
+        members: [person1]
+        state_code: MD
+  output:
+    md_paa_provider_rate: 1_137
+
+- name: Case 9, pre-2018 period uses COMAR 2009 ASSISTED_LIVING rate.
+  period: 2010-01
+  absolute_error_margin: 0.01
+  input:
+    people:
+      person1:
+        ssi: 9_600  # gates md_paa_eligible (defined_for on this variable)
+        md_paa_living_arrangement: ASSISTED_LIVING
+    households:
+      household:
+        members: [person1]
+        state_code: MD
+  output:
+    md_paa_provider_rate: 858
+
+# Pre/post 2018-01-01 transition: the test runner only supports January
+# (or whole-year) periods, so the rate jump first documented in AT 18-11
+# is verified by pairing 2010-01 (Cases 8 and 9 above) with 2018-01 below.
+- name: Case 10, 2018-01 CARE_HOME_LEVEL_C jumps to $1,173 (AT 18-11 effective).
+  period: 2018-01
+  absolute_error_margin: 0.01
+  input:
+    people:
+      person1:
+        ssi: 9_600  # gates md_paa_eligible (defined_for on this variable)
+        md_paa_living_arrangement: CARE_HOME_LEVEL_C
+    households:
+      household:
+        members: [person1]
+        state_code: MD
+  output:
+    md_paa_provider_rate: 1_173
+
+- name: Case 11, 2018-01 ASSISTED_LIVING jumps to $894 (AT 18-11 effective).
+  period: 2018-01
+  absolute_error_margin: 0.01
+  input:
+    people:
+      person1:
+        ssi: 9_600  # gates md_paa_eligible (defined_for on this variable)
+        md_paa_living_arrangement: ASSISTED_LIVING
+    households:
+      household:
+        members: [person1]
+        state_code: MD
+  output:
+    md_paa_provider_rate: 894
diff --git a/policyengine_us/variables/gov/states/md/dhs/fia/paa/md_paa.py b/policyengine_us/variables/gov/states/md/dhs/fia/paa/md_paa.py
new file mode 100644
index 00000000000..5497c7d6c46
--- /dev/null
+++ b/policyengine_us/variables/gov/states/md/dhs/fia/paa/md_paa.py
@@ -0,0 +1,33 @@
+from policyengine_us.model_api import *
+
+
+class md_paa(Variable):
+    value_type = float
+    entity = Person
+    label = "Maryland Public Assistance to Adults"
+    unit = USD
+    definition_period = MONTH
+    defined_for = "md_paa_eligible"
+    reference = (
+        "https://regs.maryland.gov/us/md/exec/comar/07.03.07.09",
+        "https://regs.maryland.gov/us/md/exec/comar/07.03.07.04",
+        "https://dhs.maryland.gov/documents/FIA/Manuals/Public%20Assistance%20to%20Adults%20%28PAA%29%20Manual/PAA%20900%20Calculation%20of%20Benefits%20rev%2011.22.docx",
+        "https://www.ssa.gov/policy/docs/progdesc/ssi_st_asst/2011/md.html",
+    )
+
+    def formula(person, period, parameters):
+        # Model PAA as a prospective SSI state-supplement cascade: the
+        # applicant applies for federal SSI, federal SSI is imputed under
+        # federal rules, and Maryland pays the remaining gap to PAA needs.
+        # COMAR 07.03.07.08 defines PAA countable income; we approximate it
+        # with ssi_countable_income because PAA historically mirrors SSI's
+        # $20 unearned / $65 earned exclusions. PAA-specific income details
+        # (lump sums, parent contributions, irregular-income carve-outs)
+        # are not tracked at the moment.
+        combined_need = person("md_paa_total_cost_of_care", period)
+        available_resources = add(
+            person,
+            period,
+            ["ssi_countable_income", "md_paa_imputed_federal_ssi"],
+        )
+        return max_(combined_need - available_resources, 0)
diff --git a/policyengine_us/variables/gov/states/md/dhs/fia/paa/md_paa_eligible.py b/policyengine_us/variables/gov/states/md/dhs/fia/paa/md_paa_eligible.py
new file mode 100644
index 00000000000..67b2dd8ac95
--- /dev/null
+++ b/policyengine_us/variables/gov/states/md/dhs/fia/paa/md_paa_eligible.py
@@ -0,0 +1,93 @@
+from policyengine_us.model_api import *
+
+
+class md_paa_eligible(Variable):
+    value_type = bool
+    entity = Person
+    label = "Maryland PAA eligible"
+    definition_period = MONTH
+    defined_for = StateCode.MD
+    reference = (
+        "https://dhs.maryland.gov/documents/FIA/Manuals/Public%20Assistance%20to%20Adults%20%28PAA%29%20Manual/PAA%20300%20Technical%20Eligibility%20rev%2011.22.docx",
+        "https://regs.maryland.gov/us/md/exec/comar/07.03.07.03",
+    )
+
+    def formula(person, period, parameters):
+        # COMAR 07.03.07.03(A)(2): applicants must be aged, blind, or
+        # disabled and receive SSI, SSDI, or other federal cash benefit
+        # on the basis of those criteria. SSI and SSDI receipt already
+        # implies categorical qualification, so the aged/blind/disabled
+        # gate only applies to the broader OASI / survivor and the
+        # §300.5 / COMAR 07.03.07.03(G)(1) pending-application pathway,
+        # which under COMAR additionally requires DHS to verify ABD
+        # status before granting interim PAA — narrower than §300.5
+        # standing alone. COMAR 07.03.07.03(A)(3) ("would-be SSI-eligible
+        # except for income") is captured through the same
+        # md_paa_pending_federal_benefit input — we don't auto-detect
+        # income-denied SSI applicants at the moment, so the caller must
+        # set the flag manually.
+        receives_ssi = person("ssi", period) > 0
+        ssdi = person("social_security_disability", period)
+        receives_ssdi = ssdi > 0
+        is_categorically_qualifying = person(
+            "is_ssi_aged_blind_disabled", period.this_year
+        )
+        # `social_security` is the OASDI sum (retirement + survivors +
+        # disability + dependents). Subtract SSDI so the OASI branch only
+        # fires for non-SSDI Social Security receipt — SSDI already covers
+        # itself via `receives_ssdi`.
+        non_ssdi_oasi = person("social_security", period) - ssdi
+        receives_other_oasdi_qualifying = (
+            non_ssdi_oasi > 0
+        ) & is_categorically_qualifying
+        pending_federal_benefit = (
+            person("md_paa_pending_federal_benefit", period)
+            & is_categorically_qualifying
+        )
+        receives_federal_cash = (
+            receives_ssi
+            | receives_ssdi
+            | receives_other_oasdi_qualifying
+            | pending_federal_benefit
+        )
+        # PAA Manual §500: $2,000 resource limit. Each person's resources
+        # are evaluated against the individual limit independently — the
+        # couple limit ($3,000) is not used because PAA scopes eligibility
+        # per recipient (one assistance unit per person), not per couple.
+        # PAA's resource base also includes real property, money on hand,
+        # trusts, and transfer-of-asset penalties — those refinements are
+        # not tracked at the moment, so we approximate via
+        # ssi_countable_resources.
+        ssi_resource_limit = parameters(
+            period
+        ).gov.ssa.ssi.eligibility.resources.limit.individual
+        ssi_resources = person("ssi_countable_resources", period.this_year)
+        resource_eligible = ssi_resources <= ssi_resource_limit
+        living_arrangement = person("md_paa_living_arrangement", period)
+        in_facility = living_arrangement != living_arrangement.possible_values.NONE
+        # MDH Rehabilitative Residence is a Title XIX medical-treatment-
+        # facility setting per PAA Manual §900.3, so federal SSI is capped
+        # at $30/mo per 42 USC § 1382(e)(1)(A). The caller must set
+        # `ssi_lives_in_medical_treatment_facility` and
+        # `ssi_medicaid_pays_majority_of_care` upstream so federal SSI is
+        # computed correctly.
+        is_rehab = (
+            living_arrangement == living_arrangement.possible_values.REHAB_RESIDENCE
+        )
+        federal_la = person("ssi_federal_living_arrangement", period.this_year)
+        is_medical_facility = (
+            federal_la == federal_la.possible_values.MEDICAL_TREATMENT_FACILITY
+        )
+        # Bidirectional: REHAB iff SSI medical-facility. A CARE Home recipient
+        # with the SSI medical-facility flag set would have federal SSI capped
+        # at $30/mo and produce a wrong PAA cascade; conversely, REHAB without
+        # the flag set would skip the cap. Either inconsistency makes the
+        # person ineligible so the inputs are surfaced rather than silently
+        # producing the wrong amount.
+        facility_consistent = is_rehab == is_medical_facility
+        return (
+            receives_federal_cash
+            & resource_eligible
+            & in_facility
+            & facility_consistent
+        )
diff --git a/policyengine_us/variables/gov/states/md/dhs/fia/paa/md_paa_imputed_federal_ssi.py b/policyengine_us/variables/gov/states/md/dhs/fia/paa/md_paa_imputed_federal_ssi.py
new file mode 100644
index 00000000000..dac5d85a381
--- /dev/null
+++ b/policyengine_us/variables/gov/states/md/dhs/fia/paa/md_paa_imputed_federal_ssi.py
@@ -0,0 +1,17 @@
+from policyengine_us.model_api import *
+
+
+class md_paa_imputed_federal_ssi(Variable):
+    value_type = float
+    entity = Person
+    label = "Maryland PAA imputed federal SSI"
+    unit = USD
+    definition_period = MONTH
+    defined_for = "md_paa_eligible"
+    reference = (
+        "https://regs.maryland.gov/us/md/exec/comar/07.03.07.03",
+        "https://www.law.cornell.edu/uscode/text/42/1382#e_1_A",
+    )
+
+    def formula(person, period, parameters):
+        return max_(person("uncapped_ssi", period), 0)
diff --git a/policyengine_us/variables/gov/states/md/dhs/fia/paa/md_paa_living_arrangement.py b/policyengine_us/variables/gov/states/md/dhs/fia/paa/md_paa_living_arrangement.py
new file mode 100644
index 00000000000..cf70d2748e9
--- /dev/null
+++ b/policyengine_us/variables/gov/states/md/dhs/fia/paa/md_paa_living_arrangement.py
@@ -0,0 +1,29 @@
+from policyengine_us.model_api import *
+
+
+class MDPAALivingArrangement(Enum):
+    # CARE Home is the current term per PAA Manual §300.7.B; AT 23-02
+    # page 3 still uses the legacy "Project Home Level *" wording.
+    CARE_HOME_LEVEL_A = "CARE Home Level A"
+    CARE_HOME_LEVEL_B = "CARE Home Level B"
+    CARE_HOME_LEVEL_C = "CARE Home Level C"
+    CARE_HOME_LEVEL_D = "CARE Home Level D"
+    ASSISTED_LIVING = "Licensed Assisted Living"
+    REHAB_RESIDENCE = "MDH Rehabilitative Residence"
+    NONE = "None"
+
+
+class md_paa_living_arrangement(Variable):
+    value_type = Enum
+    entity = Person
+    label = "Maryland PAA living arrangement"
+    definition_period = MONTH
+    defined_for = StateCode.MD
+    possible_values = MDPAALivingArrangement
+    default_value = MDPAALivingArrangement.NONE
+    reference = (
+        "https://regs.maryland.gov/us/md/exec/comar/07.03.07.04",
+        "https://dhs.maryland.gov/documents/FIA/Manuals/Public%20Assistance%20to%20Adults%20%28PAA%29%20Manual/PAA%20300%20Technical%20Eligibility%20rev%2011.22.docx",
+        "https://dhs.maryland.gov/documents/FIA/Manuals/Public%20Assistance%20to%20Adults%20%28PAA%29%20Manual/PAA%20900%20Calculation%20of%20Benefits%20rev%2011.22.docx",
+        "https://dhs.maryland.gov/documents/FIA/Action%20Transmittals-AT%20-%20Information%20Memo-IM/AT-IM2023/23-02%20AT%20-%20COLA%20Mass%20Mod%20FFY23.pdf#page=3",
+    )
diff --git a/policyengine_us/variables/gov/states/md/dhs/fia/paa/md_paa_pending_federal_benefit.py b/policyengine_us/variables/gov/states/md/dhs/fia/paa/md_paa_pending_federal_benefit.py
new file mode 100644
index 00000000000..8492f7fa052
--- /dev/null
+++ b/policyengine_us/variables/gov/states/md/dhs/fia/paa/md_paa_pending_federal_benefit.py
@@ -0,0 +1,14 @@
+from policyengine_us.model_api import *
+
+
+class md_paa_pending_federal_benefit(Variable):
+    value_type = bool
+    entity = Person
+    label = "Maryland PAA pending federal cash benefit applicant"
+    definition_period = MONTH
+    defined_for = StateCode.MD
+    default_value = False
+    reference = (
+        "https://regs.maryland.gov/us/md/exec/comar/07.03.07.03",
+        "https://dhs.maryland.gov/documents/FIA/Manuals/Public%20Assistance%20to%20Adults%20%28PAA%29%20Manual/PAA%20300%20Technical%20Eligibility%20rev%2011.22.docx",
+    )
diff --git a/policyengine_us/variables/gov/states/md/dhs/fia/paa/md_paa_personal_needs_allowance.py b/policyengine_us/variables/gov/states/md/dhs/fia/paa/md_paa_personal_needs_allowance.py
new file mode 100644
index 00000000000..b484221b307
--- /dev/null
+++ b/policyengine_us/variables/gov/states/md/dhs/fia/paa/md_paa_personal_needs_allowance.py
@@ -0,0 +1,17 @@
+from policyengine_us.model_api import *
+
+
+class md_paa_personal_needs_allowance(Variable):
+    value_type = float
+    entity = Person
+    label = "Maryland PAA personal needs allowance"
+    unit = USD
+    definition_period = MONTH
+    defined_for = "md_paa_eligible"
+    reference = (
+        "https://regs.maryland.gov/us/md/exec/comar/07.03.07.04",
+        "https://dhs.maryland.gov/documents/FIA/Action%20Transmittals-AT%20-%20Information%20Memo-IM/AT-IM2023/23-02%20AT%20-%20COLA%20Mass%20Mod%20FFY23.pdf#page=3",
+        "https://dhs.maryland.gov/documents/FIA/Action%20Transmittals-AT%20-%20Information%20Memo-IM/AT-IM2026/26-04%20IM%202025%20PNA%20Increase.pdf#page=2",
+        "https://dhs.maryland.gov/documents/FIA/Manuals/Public%20Assistance%20to%20Adults%20%28PAA%29%20Manual/PAA%20900%20Calculation%20of%20Benefits%20rev%2011.22.docx",
+    )
+    adds = ["gov.states.md.dhs.fia.paa.personal_needs_allowance"]
diff --git a/policyengine_us/variables/gov/states/md/dhs/fia/paa/md_paa_provider_rate.py b/policyengine_us/variables/gov/states/md/dhs/fia/paa/md_paa_provider_rate.py
new file mode 100644
index 00000000000..60d882805e1
--- /dev/null
+++ b/policyengine_us/variables/gov/states/md/dhs/fia/paa/md_paa_provider_rate.py
@@ -0,0 +1,21 @@
+from policyengine_us.model_api import *
+
+
+class md_paa_provider_rate(Variable):
+    value_type = float
+    entity = Person
+    label = "Maryland PAA provider rate"
+    unit = USD
+    definition_period = MONTH
+    defined_for = "md_paa_eligible"
+    reference = (
+        "https://regs.maryland.gov/us/md/exec/comar/07.03.07.04",
+        "https://regs.maryland.gov/us/md/exec/comar/07.03.07.09",
+        "https://dhs.maryland.gov/documents/FIA/Action%20Transmittals-AT%20-%20Information%20Memo-IM/AT-IM2023/23-02%20AT%20-%20COLA%20Mass%20Mod%20FFY23.pdf#page=3",
+    )
+
+    def formula(person, period, parameters):
+        living_arrangement = person("md_paa_living_arrangement", period)
+        return parameters(period).gov.states.md.dhs.fia.paa.provider_rate[
+            living_arrangement
+        ]
diff --git a/policyengine_us/variables/gov/states/md/dhs/fia/paa/md_paa_total_cost_of_care.py b/policyengine_us/variables/gov/states/md/dhs/fia/paa/md_paa_total_cost_of_care.py
new file mode 100644
index 00000000000..c6a49939237
--- /dev/null
+++ b/policyengine_us/variables/gov/states/md/dhs/fia/paa/md_paa_total_cost_of_care.py
@@ -0,0 +1,15 @@
+from policyengine_us.model_api import *
+
+
+class md_paa_total_cost_of_care(Variable):
+    value_type = float
+    entity = Person
+    label = "Maryland PAA total cost of care"
+    unit = USD
+    definition_period = MONTH
+    defined_for = "md_paa_eligible"
+    reference = (
+        "https://regs.maryland.gov/us/md/exec/comar/07.03.07.09",
+        "https://dhs.maryland.gov/documents/FIA/Manuals/Public%20Assistance%20to%20Adults%20%28PAA%29%20Manual/PAA%20900%20Calculation%20of%20Benefits%20rev%2011.22.docx",
+    )
+    adds = ["md_paa_provider_rate", "md_paa_personal_needs_allowance"]
diff --git a/policyengine_us/variables/household/income/spm_unit/spm_unit_benefits.py b/policyengine_us/variables/household/income/spm_unit/spm_unit_benefits.py
index 4c7705cf267..1c46467f44e 100644
--- a/policyengine_us/variables/household/income/spm_unit/spm_unit_benefits.py
+++ b/policyengine_us/variables/household/income/spm_unit/spm_unit_benefits.py
@@ -26,6 +26,7 @@ def formula(spm_unit, period, parameters):
             "hi_oss",
             "la_oss",  # Louisiana benefits
             "ma_state_supplement",  # Massachusetts benefits
+            "md_paa",  # Maryland benefits
             "wa_ssp",  # Washington benefits
             "mi_ssp",  # Michigan benefits
             "me_ssp",  # Maine benefits