diff --git a/mpt_api_client/resources/billing/custom_ledger_upload.py b/mpt_api_client/resources/billing/custom_ledger_upload.py
new file mode 100644
index 0000000..2c445b3
--- /dev/null
+++ b/mpt_api_client/resources/billing/custom_ledger_upload.py
@@ -0,0 +1,31 @@
+from mpt_api_client.http import AsyncService, Service
+from mpt_api_client.http.mixins import AsyncFileOperationsMixin, FileOperationsMixin
+from mpt_api_client.models import Model
+
+
+class CustomLedgerUpload(Model):
+    """Custom Ledger Upload resource."""
+
+
+class CustomLedgerUploadServiceConfig:
+    """Custom Ledger Upload service configuration."""
+
+    _endpoint = "/public/v1/billing/custom-ledgers/{custom_ledger_id}/upload"
+    _model_class = CustomLedgerUpload
+    _collection_key = "data"
+
+
+class CustomLedgerUploadService(
+    FileOperationsMixin[CustomLedgerUpload],
+    Service[CustomLedgerUpload],
+    CustomLedgerUploadServiceConfig,
+):
+    """Custom Ledger Upload service."""
+
+
+class AsyncCustomLedgerUploadService(
+    AsyncFileOperationsMixin[CustomLedgerUpload],
+    AsyncService[CustomLedgerUpload],
+    CustomLedgerUploadServiceConfig,
+):
+    """Async Custom Ledger Upload service."""
diff --git a/mpt_api_client/resources/billing/custom_ledgers.py b/mpt_api_client/resources/billing/custom_ledgers.py
index cd504bb..c24ffbe 100644
--- a/mpt_api_client/resources/billing/custom_ledgers.py
+++ b/mpt_api_client/resources/billing/custom_ledgers.py
@@ -12,6 +12,10 @@
     AsyncCustomLedgerChargesService,
     CustomLedgerChargesService,
 )
+from mpt_api_client.resources.billing.custom_ledger_upload import (
+    AsyncCustomLedgerUploadService,
+    CustomLedgerUploadService,
+)
 from mpt_api_client.resources.billing.mixins import AcceptableMixin, AsyncAcceptableMixin
 
 
@@ -44,6 +48,13 @@ def charges(self, custom_ledger_id: str) -> CustomLedgerChargesService:
             endpoint_params={"custom_ledger_id": custom_ledger_id},
         )
 
+    def upload(self, custom_ledger_id: str) -> CustomLedgerUploadService:
+        """Get the Custom Ledger Upload service."""
+        return CustomLedgerUploadService(
+            http_client=self.http_client,
+            endpoint_params={"custom_ledger_id": custom_ledger_id},
+        )
+
 
 class AsyncCustomLedgersService(
     AsyncCreateMixin[CustomLedger],
@@ -61,3 +72,10 @@ def charges(self, custom_ledger_id: str) -> AsyncCustomLedgerChargesService:
             http_client=self.http_client,
             endpoint_params={"custom_ledger_id": custom_ledger_id},
         )
+
+    def upload(self, custom_ledger_id: str) -> AsyncCustomLedgerUploadService:
+        """Get the Async Custom Ledger Upload service."""
+        return AsyncCustomLedgerUploadService(
+            http_client=self.http_client,
+            endpoint_params={"custom_ledger_id": custom_ledger_id},
+        )
diff --git a/tests/resources/billing/test_custom_ledger_upload.py b/tests/resources/billing/test_custom_ledger_upload.py
new file mode 100644
index 0000000..d2fb805
--- /dev/null
+++ b/tests/resources/billing/test_custom_ledger_upload.py
@@ -0,0 +1,42 @@
+import pytest
+
+from mpt_api_client.resources.billing.custom_ledger_upload import (
+    AsyncCustomLedgerUploadService,
+    CustomLedgerUploadService,
+)
+
+
+@pytest.fixture
+def custom_ledger_upload_service(http_client):
+    return CustomLedgerUploadService(
+        http_client=http_client, endpoint_params={"custom_ledger_id": "LDG-0000-0001"}
+    )
+
+
+@pytest.fixture
+def async_custom_ledger_upload_service(http_client):
+    return AsyncCustomLedgerUploadService(
+        http_client=http_client, endpoint_params={"custom_ledger_id": "LDG-0000-0001"}
+    )
+
+
+def test_endpoint(custom_ledger_upload_service):
+    assert custom_ledger_upload_service.endpoint == (
+        "/public/v1/billing/custom-ledgers/LDG-0000-0001/upload"
+    )
+
+
+def test_async_endpoint(async_custom_ledger_upload_service):
+    assert async_custom_ledger_upload_service.endpoint == (
+        "/public/v1/billing/custom-ledgers/LDG-0000-0001/upload"
+    )
+
+
+@pytest.mark.parametrize("method", ["create"])
+def test_mixins_present(custom_ledger_upload_service, method):
+    assert hasattr(custom_ledger_upload_service, method)
+
+
+@pytest.mark.parametrize("method", ["create"])
+def test_async_mixins_present(async_custom_ledger_upload_service, method):
+    assert hasattr(async_custom_ledger_upload_service, method)
diff --git a/tests/resources/billing/test_custom_ledgers.py b/tests/resources/billing/test_custom_ledgers.py
index 8348058..9913979 100644
--- a/tests/resources/billing/test_custom_ledgers.py
+++ b/tests/resources/billing/test_custom_ledgers.py
@@ -4,6 +4,10 @@
     AsyncCustomLedgerChargesService,
     CustomLedgerChargesService,
 )
+from mpt_api_client.resources.billing.custom_ledger_upload import (
+    AsyncCustomLedgerUploadService,
+    CustomLedgerUploadService,
+)
 from mpt_api_client.resources.billing.custom_ledgers import (
     AsyncCustomLedgersService,
     CustomLedgersService,
@@ -34,6 +38,7 @@ def test_async_mixins_present(async_custom_ledgers_service, method):
     ("service_method", "expected_service_class"),
     [
         ("charges", CustomLedgerChargesService),
+        ("upload", CustomLedgerUploadService),
     ],
 )
 def test_property_services(custom_ledgers_service, service_method, expected_service_class):
@@ -47,6 +52,7 @@ def test_property_services(custom_ledgers_service, service_method, expected_serv
     ("service_method", "expected_service_class"),
     [
         ("charges", AsyncCustomLedgerChargesService),
+        ("upload", AsyncCustomLedgerUploadService),
     ],
 )
 def test_async_property_services(