diff --git a/enterprise_access/apps/subsidy_access_policy/admin/__init__.py b/enterprise_access/apps/subsidy_access_policy/admin/__init__.py
index 1d688c76..a8eeebe2 100644
--- a/enterprise_access/apps/subsidy_access_policy/admin/__init__.py
+++ b/enterprise_access/apps/subsidy_access_policy/admin/__init__.py
@@ -26,7 +26,7 @@
     SubsidyAccessPolicySetLateRedemptionView
 )
 
-from .forms import ForcedPolicyRedemptionForm
+from .forms import ForcedPolicyRedemptionForm, SubsidyAccessPolicyForm
 
 logger = logging.getLogger(__name__)
 
@@ -199,6 +199,8 @@ class PerLearnerEnrollmentCreditAccessPolicy(DjangoQLSearchMixin, BaseSubsidyAcc
     """
     Admin configuration for PerLearnerEnrollmentCreditAccessPolicy.
     """
+    form = SubsidyAccessPolicyForm
+
     list_display = BaseSubsidyAccessPolicyMixin.list_display + (
         'per_learner_enrollment_limit',
     )
@@ -250,6 +252,8 @@ class PerLearnerSpendCreditAccessPolicy(DjangoQLSearchMixin, BaseSubsidyAccessPo
     """
     Admin configuration for PerLearnerSpendCreditAccessPolicy.
     """
+    form = SubsidyAccessPolicyForm
+
     list_display = BaseSubsidyAccessPolicyMixin.list_display + (
         'per_learner_spend_limit_dollars',
     )
@@ -313,6 +317,8 @@ class LearnerContentAssignmentAccessPolicy(DjangoQLSearchMixin, BaseSubsidyAcces
     """
     Admin configuration for AssignedLearnerCreditAccessPolicy.
     """
+    form = SubsidyAccessPolicyForm
+
     search_fields = (
         'uuid',
         'display_name',
diff --git a/enterprise_access/apps/subsidy_access_policy/admin/forms.py b/enterprise_access/apps/subsidy_access_policy/admin/forms.py
index b202adf5..5236f4c0 100644
--- a/enterprise_access/apps/subsidy_access_policy/admin/forms.py
+++ b/enterprise_access/apps/subsidy_access_policy/admin/forms.py
@@ -1,11 +1,15 @@
 """
 Forms to be used for subsidy_access_policy django admin.
 """
+import requests
 from django import forms
 from django.conf import settings
+from django.core.exceptions import ValidationError
 from django.utils.translation import gettext as _
 
-from ..models import ForcedPolicyRedemption
+from enterprise_access.apps.subsidy_access_policy.utils import get_versioned_subsidy_client
+
+from ..models import ForcedPolicyRedemption, SubsidyAccessPolicy
 
 
 class LateRedemptionDaysFromNowChoices:
@@ -92,3 +96,30 @@ class ForcedPolicyRedemptionForm(forms.ModelForm):
     class Meta:
         model = ForcedPolicyRedemption
         fields = '__all__'
+
+
+class SubsidyAccessPolicyForm(forms.ModelForm):
+    """
+    Admin form for the SubsidyAccessPolicy model.
+    """
+    def clean_subsidy_uuid(self):
+        """
+        Validate that the subsidy exists and is assigned to the same enterprise customer as the budget.
+        """
+        # 1. check if the subsidy_uuid actually exists
+        # 2. subsidy is assigned to the same enterprise customer as the budget
+        # if any of these checks fail, raise a ValidationError
+        client = get_versioned_subsidy_client(version=1)
+        try:
+            subsidy = client.retrieve_subsidy(self.cleaned_data["subsidy_uuid"])
+        except requests.exceptions.HTTPError as exc:
+            raise ValidationError("Subsidy does not exist") from exc
+
+        if str(subsidy["enterprise_customer_uuid"]) != str(self.cleaned_data["enterprise_customer_uuid"]):
+            raise ValidationError("Subsidy is not assigned to the same enterprise customer as the budget")
+
+        return self.cleaned_data["subsidy_uuid"]
+
+    class Meta:
+        model = SubsidyAccessPolicy
+        fields = '__all__'
diff --git a/enterprise_access/apps/subsidy_access_policy/tests/test_forms.py b/enterprise_access/apps/subsidy_access_policy/tests/test_forms.py
new file mode 100644
index 00000000..82c22c05
--- /dev/null
+++ b/enterprise_access/apps/subsidy_access_policy/tests/test_forms.py
@@ -0,0 +1,77 @@
+"""
+Unittests for forms.
+"""
+import uuid
+from unittest import mock
+
+import requests
+from django.test import TestCase
+
+from enterprise_access.apps.subsidy_access_policy.admin.forms import SubsidyAccessPolicyForm
+from enterprise_access.apps.subsidy_access_policy.constants import AccessMethods
+
+
+class TestSubsidyAccessPolicyForm(TestCase):
+    """
+    Tests for SubsidyAccessPolicyForm.
+    """
+    def setUp(self):
+        super().setUp()
+        self.enterprise_customer_uuid = uuid.uuid4()
+        self.subsidy_uuid = uuid.uuid4()
+        self.catalog_uuid = uuid.uuid4()
+        self.form_data = {
+            'enterprise_customer_uuid': self.enterprise_customer_uuid,
+            'subsidy_uuid': self.subsidy_uuid,
+            'catalog_uuid': self.catalog_uuid,
+            'access_method': AccessMethods.DIRECT,
+        }
+
+    @mock.patch('enterprise_access.apps.subsidy_access_policy.admin.forms.get_versioned_subsidy_client')
+    def test_clean_subsidy_uuid_success(self, mock_get_client):
+        """
+        Test successful validation when subsidy exists and belongs to enterprise customer.
+        """
+        mock_client = mock.MagicMock()
+        mock_client.retrieve_subsidy.return_value = {
+            'enterprise_customer_uuid': self.enterprise_customer_uuid
+        }
+        mock_get_client.return_value = mock_client
+
+        form = SubsidyAccessPolicyForm(data=self.form_data)
+        self.assertTrue(form.is_valid())
+        self.assertEqual(form.cleaned_data['subsidy_uuid'], self.subsidy_uuid)
+
+    @mock.patch('enterprise_access.apps.subsidy_access_policy.admin.forms.get_versioned_subsidy_client')
+    def test_clean_subsidy_uuid_not_found(self, mock_get_client):
+        """
+        Verify that a validation error is raised when the subsidy does not exist.
+        """
+        mock_client = mock.MagicMock()
+        mock_client.retrieve_subsidy.side_effect = requests.exceptions.HTTPError()
+        mock_get_client.return_value = mock_client
+
+        form = SubsidyAccessPolicyForm(data=self.form_data)
+        self.assertFalse(form.is_valid())
+        self.assertIn('subsidy_uuid', form.errors)
+        self.assertEqual(form.errors['subsidy_uuid'], ['Subsidy does not exist'])
+
+    @mock.patch('enterprise_access.apps.subsidy_access_policy.admin.forms.get_versioned_subsidy_client')
+    def test_clean_subsidy_uuid_wrong_enterprise(self, mock_get_client):
+        """
+        Verify that a validation error is raised when the subsidy belongs to a different enterprise customer.
+        """
+        different_enterprise_uuid = uuid.uuid4()
+        mock_client = mock.MagicMock()
+        mock_client.retrieve_subsidy.return_value = {
+            'enterprise_customer_uuid': different_enterprise_uuid
+        }
+        mock_get_client.return_value = mock_client
+
+        form = SubsidyAccessPolicyForm(data=self.form_data)
+        self.assertFalse(form.is_valid())
+        self.assertIn('subsidy_uuid', form.errors)
+        self.assertEqual(
+            form.errors['subsidy_uuid'],
+            ['Subsidy is not assigned to the same enterprise customer as the budget']
+        )