diff --git a/backend/categorisation/categorisation_trigger_request.py b/backend/categorisation/categorisation_trigger_request.py
new file mode 100644
index 00000000..9ef1d106
--- /dev/null
+++ b/backend/categorisation/categorisation_trigger_request.py
@@ -0,0 +1,5 @@
+from pydantic import BaseModel
+
+
+class CategorisationTriggerRequest(BaseModel):
+    portfolio_id: int