diff --git a/enterprise_subsidy/apps/subsidy/signals.py b/enterprise_subsidy/apps/subsidy/signals.py
index 28eff8b1..22bad383 100644
--- a/enterprise_subsidy/apps/subsidy/signals.py
+++ b/enterprise_subsidy/apps/subsidy/signals.py
@@ -4,8 +4,9 @@
 from django.db.models.signals import pre_save
 from django.dispatch import receiver
 from openedx_ledger.api import create_ledger
+from openedx_ledger.models import SalesContractReferenceProvider
 
-from .models import Subsidy
+from .models import Subsidy, SubsidyReferenceChoices
 
 
 @receiver(pre_save, sender=Subsidy)
@@ -21,6 +22,16 @@ def subsidy_pre_save(sender, instance, *args, **kwargs):  # pylint: disable=unus
     if instance.ledger or not instance._state.adding:
         return
 
+    # In order to call create_ledger() later, we first need to get or create a SalesContractReferenceProvider. In order
+    # to avoid manual intervention, we mirror the SubsidyReferenceChoices selection into the
+    # SalesContractReferenceProvider table as needed. The normal steady-state is to always just re-use (get) an existing
+    # provider.
+    subsidy_reference_choices = dict((slug, name) for slug, name in SubsidyReferenceChoices.CHOICES)
+    sales_contract_reference_provider, _ = SalesContractReferenceProvider.objects.get_or_create(
+        slug=instance.reference_type,
+        defaults={"name": subsidy_reference_choices[instance.reference_type]},
+    )
+
     # create_ledger() saves the ledger instance.
     # If a transaction for the starting_balance is created,
     # that transaction record is also saved during
@@ -29,4 +40,6 @@ def subsidy_pre_save(sender, instance, *args, **kwargs):  # pylint: disable=unus
         unit=instance.unit,
         subsidy_uuid=instance.uuid,
         initial_deposit=instance.starting_balance,
+        sales_contract_reference_id=instance.reference_id,
+        sales_contract_reference_provider=sales_contract_reference_provider,
     )
diff --git a/requirements/base.txt b/requirements/base.txt
index becb2a09..b018e8a2 100644
--- a/requirements/base.txt
+++ b/requirements/base.txt
@@ -199,7 +199,7 @@ openedx-events==9.11.0
     #   -r requirements/base.in
     #   edx-event-bus-kafka
     #   openedx-ledger
-openedx-ledger==1.5.1
+openedx-ledger==1.5.3
     # via -r requirements/base.in
 packaging==24.1
     # via drf-yasg
diff --git a/requirements/dev.txt b/requirements/dev.txt
index 5ad9845f..0dbfb796 100644
--- a/requirements/dev.txt
+++ b/requirements/dev.txt
@@ -379,7 +379,7 @@ openedx-events==9.11.0
     #   -r requirements/validation.txt
     #   edx-event-bus-kafka
     #   openedx-ledger
-openedx-ledger==1.5.1
+openedx-ledger==1.5.3
     # via -r requirements/validation.txt
 packaging==24.1
     # via
diff --git a/requirements/doc.txt b/requirements/doc.txt
index 77635198..9b1a88a6 100644
--- a/requirements/doc.txt
+++ b/requirements/doc.txt
@@ -358,7 +358,7 @@ openedx-events==9.11.0
     #   -r requirements/test.txt
     #   edx-event-bus-kafka
     #   openedx-ledger
-openedx-ledger==1.5.1
+openedx-ledger==1.5.3
     # via -r requirements/test.txt
 packaging==24.1
     # via
diff --git a/requirements/production.txt b/requirements/production.txt
index 7acddc68..0095298e 100644
--- a/requirements/production.txt
+++ b/requirements/production.txt
@@ -244,7 +244,7 @@ openedx-events==9.11.0
     #   -r requirements/base.txt
     #   edx-event-bus-kafka
     #   openedx-ledger
-openedx-ledger==1.5.1
+openedx-ledger==1.5.3
     # via -r requirements/base.txt
 packaging==24.1
     # via
diff --git a/requirements/quality.txt b/requirements/quality.txt
index ef033acf..b58ff340 100644
--- a/requirements/quality.txt
+++ b/requirements/quality.txt
@@ -339,7 +339,7 @@ openedx-events==9.11.0
     #   -r requirements/test.txt
     #   edx-event-bus-kafka
     #   openedx-ledger
-openedx-ledger==1.5.1
+openedx-ledger==1.5.3
     # via -r requirements/test.txt
 packaging==24.1
     # via
diff --git a/requirements/test.txt b/requirements/test.txt
index 90af0832..d7b472b9 100644
--- a/requirements/test.txt
+++ b/requirements/test.txt
@@ -287,7 +287,7 @@ openedx-events==9.11.0
     #   -r requirements/base.txt
     #   edx-event-bus-kafka
     #   openedx-ledger
-openedx-ledger==1.5.1
+openedx-ledger==1.5.3
     # via -r requirements/base.txt
 packaging==24.1
     # via
diff --git a/requirements/validation.txt b/requirements/validation.txt
index b83dc1f8..99ce8c3f 100644
--- a/requirements/validation.txt
+++ b/requirements/validation.txt
@@ -435,7 +435,7 @@ openedx-events==9.11.0
     #   -r requirements/test.txt
     #   edx-event-bus-kafka
     #   openedx-ledger
-openedx-ledger==1.5.1
+openedx-ledger==1.5.3
     # via
     #   -r requirements/quality.txt
     #   -r requirements/test.txt