diff --git a/Civi/Paymentprocessingcore/DTO/RecurringContributionDTO.php b/Civi/Paymentprocessingcore/DTO/RecurringContributionDTO.php
index a02f716..909fc7d 100644
--- a/Civi/Paymentprocessingcore/DTO/RecurringContributionDTO.php
+++ b/Civi/Paymentprocessingcore/DTO/RecurringContributionDTO.php
@@ -55,6 +55,11 @@ class RecurringContributionDTO {
    */
   private int $frequencyInterval;
 
+  /**
+   * @var int|null
+   */
+  private ?int $paymentInstrumentId;
+
   /**
    * Private constructor — use fromApiResult() factory method.
    *
@@ -76,6 +81,8 @@ class RecurringContributionDTO {
    *   Frequency unit (day, week, month, year).
    * @param int $frequencyInterval
    *   Frequency interval.
+   * @param int|null $paymentInstrumentId
+   *   Payment instrument ID or NULL.
    */
   private function __construct(
     int $id,
@@ -86,7 +93,8 @@ private function __construct(
     ?int $campaignId,
     string $nextSchedContributionDate,
     string $frequencyUnit,
-    int $frequencyInterval
+    int $frequencyInterval,
+    ?int $paymentInstrumentId
   ) {
     $this->id = $id;
     $this->contactId = $contactId;
@@ -97,6 +105,7 @@ private function __construct(
     $this->nextSchedContributionDate = $nextSchedContributionDate;
     $this->frequencyUnit = $frequencyUnit;
     $this->frequencyInterval = $frequencyInterval;
+    $this->paymentInstrumentId = $paymentInstrumentId;
   }
 
   /**
@@ -148,6 +157,10 @@ public static function fromApiResult(array $record): self {
       ? (int) $record['campaign_id']
       : NULL;
 
+    $paymentInstrumentId = isset($record['payment_instrument_id']) && is_numeric($record['payment_instrument_id'])
+      ? (int) $record['payment_instrument_id']
+      : NULL;
+
     return new self(
       (int) $id,
       (int) $contactId,
@@ -157,7 +170,8 @@ public static function fromApiResult(array $record): self {
       $campaignId,
       (string) $nextSchedDate,
       (string) $frequencyUnit,
-      (int) $frequencyInterval
+      (int) $frequencyInterval,
+      $paymentInstrumentId
     );
   }
 
@@ -224,4 +238,11 @@ public function getFrequencyInterval(): int {
     return $this->frequencyInterval;
   }
 
+  /**
+   * Get the payment instrument ID, or NULL if not set.
+   */
+  public function getPaymentInstrumentId(): ?int {
+    return $this->paymentInstrumentId;
+  }
+
 }
diff --git a/Civi/Paymentprocessingcore/Service/InstalmentGenerationService.php b/Civi/Paymentprocessingcore/Service/InstalmentGenerationService.php
index 5c49bed..60793fa 100644
--- a/Civi/Paymentprocessingcore/Service/InstalmentGenerationService.php
+++ b/Civi/Paymentprocessingcore/Service/InstalmentGenerationService.php
@@ -149,7 +149,8 @@ public function getDueRecurringContributions(string $processorType, int $batchSi
         'amount',
         'currency',
         'financial_type_id',
-        'campaign_id'
+        'campaign_id',
+        'payment_instrument_id'
       )
       ->addJoin(
         'PaymentProcessor AS pp',
@@ -258,6 +259,10 @@ public function createInstalment(RecurringContributionDTO $recur, string $receiv
       $createAction->addValue('campaign_id', $recur->getCampaignId());
     }
 
+    if ($recur->getPaymentInstrumentId() !== NULL) {
+      $createAction->addValue('payment_instrument_id', $recur->getPaymentInstrumentId());
+    }
+
     $result = $createAction->execute()->first();
 
     if (!is_array($result)) {
diff --git a/tests/phpunit/Civi/Paymentprocessingcore/DTO/RecurringContributionDTOTest.php b/tests/phpunit/Civi/Paymentprocessingcore/DTO/RecurringContributionDTOTest.php
index f9e2273..f0675dc 100644
--- a/tests/phpunit/Civi/Paymentprocessingcore/DTO/RecurringContributionDTOTest.php
+++ b/tests/phpunit/Civi/Paymentprocessingcore/DTO/RecurringContributionDTOTest.php
@@ -23,6 +23,7 @@ public function testFromApiResultWithValidData(): void {
       'next_sched_contribution_date' => '2025-07-15',
       'frequency_unit:name' => 'week',
       'frequency_interval' => 2,
+      'payment_instrument_id' => 4,
     ];
 
     $dto = RecurringContributionDTO::fromApiResult($record);
@@ -36,6 +37,7 @@ public function testFromApiResultWithValidData(): void {
     $this->assertSame('2025-07-15', $dto->getNextSchedContributionDate());
     $this->assertSame('week', $dto->getFrequencyUnit());
     $this->assertSame(2, $dto->getFrequencyInterval());
+    $this->assertSame(4, $dto->getPaymentInstrumentId());
   }
 
   /**
@@ -104,6 +106,45 @@ public function testFromApiResultThrowsOnMissingDate(): void {
     ]);
   }
 
+  /**
+   * Tests that null payment_instrument_id returns null.
+   */
+  public function testFromApiResultWithNullPaymentInstrumentId(): void {
+    $record = [
+      'id' => 1,
+      'contact_id' => 2,
+      'amount' => 10.00,
+      'currency' => 'USD',
+      'financial_type_id' => 1,
+      'payment_instrument_id' => NULL,
+      'next_sched_contribution_date' => '2025-07-15',
+      'frequency_unit:name' => 'month',
+      'frequency_interval' => 1,
+    ];
+
+    $dto = RecurringContributionDTO::fromApiResult($record);
+
+    $this->assertNull($dto->getPaymentInstrumentId());
+  }
+
+  /**
+   * Tests that missing payment_instrument_id returns null.
+   */
+  public function testFromApiResultWithMissingPaymentInstrumentId(): void {
+    $record = [
+      'id' => 1,
+      'contact_id' => 2,
+      'amount' => 10.00,
+      'currency' => 'USD',
+      'financial_type_id' => 1,
+      'next_sched_contribution_date' => '2025-07-15',
+    ];
+
+    $dto = RecurringContributionDTO::fromApiResult($record);
+
+    $this->assertNull($dto->getPaymentInstrumentId());
+  }
+
   /**
    * Tests that missing contact_id throws InvalidArgumentException.
    */
diff --git a/tests/phpunit/Civi/Paymentprocessingcore/Service/InstalmentGenerationServiceTest.php b/tests/phpunit/Civi/Paymentprocessingcore/Service/InstalmentGenerationServiceTest.php
index 9a88430..8065d17 100644
--- a/tests/phpunit/Civi/Paymentprocessingcore/Service/InstalmentGenerationServiceTest.php
+++ b/tests/phpunit/Civi/Paymentprocessingcore/Service/InstalmentGenerationServiceTest.php
@@ -584,6 +584,45 @@ public function testCreateInstalmentCopiesCampaignId(): void {
     $this->assertEquals($campaignId, (int) $result);
   }
 
+  /**
+   * Tests createInstalment copies payment_instrument_id when present.
+   */
+  public function testCreateInstalmentCopiesPaymentInstrumentId(): void {
+    $processorId = $this->createPaymentProcessor();
+    $contactId = $this->createContact();
+
+    // Look up EFT payment instrument (non-default, avoids false positives).
+    $eftInstrument = \Civi\Api4\OptionValue::get(FALSE)
+      ->addSelect('value')
+      ->addWhere('option_group_id:name', '=', 'payment_instrument')
+      ->addWhere('name', '=', 'EFT')
+      ->execute()
+      ->first();
+
+    $this->assertNotNull($eftInstrument);
+    $paymentInstrumentId = (int) $eftInstrument['value'];
+
+    $recurId = $this->createRecurringContribution($contactId, $processorId);
+    $recur = RecurringContributionDTO::fromApiResult([
+      'id' => $recurId,
+      'contact_id' => $contactId,
+      'amount' => 50.00,
+      'currency' => 'GBP',
+      'financial_type_id' => 1,
+      'payment_instrument_id' => $paymentInstrumentId,
+      'next_sched_contribution_date' => date('Y-m-d'),
+    ]);
+
+    $contributionId = $this->service->createInstalment($recur, date('Y-m-d'));
+
+    $result = \CRM_Core_DAO::singleValueQuery(
+      'SELECT payment_instrument_id FROM civicrm_contribution WHERE id = %1',
+      [1 => [$contributionId, 'Integer']]
+    );
+
+    $this->assertEquals($paymentInstrumentId, (int) $result);
+  }
+
   /**
    * Tests createInstalment sets is_pay_later to 0.
    */
@@ -721,7 +760,7 @@ public function testInjectableReferenceDateControlsDueContributions(): void {
    */
   private function getRecurRecord(int $recurId): RecurringContributionDTO {
     $recur = \Civi\Api4\ContributionRecur::get(FALSE)
-      ->addSelect('id', 'contact_id', 'amount', 'currency', 'financial_type_id', 'campaign_id', 'next_sched_contribution_date')
+      ->addSelect('id', 'contact_id', 'amount', 'currency', 'financial_type_id', 'campaign_id', 'payment_instrument_id', 'next_sched_contribution_date')
       ->addWhere('id', '=', $recurId)
       ->execute()
       ->first();