diff --git a/api.planx.uk/modules/send/s3/index.test.ts b/api.planx.uk/modules/send/s3/index.test.ts
index 9db576188e..352c8c07ef 100644
--- a/api.planx.uk/modules/send/s3/index.test.ts
+++ b/api.planx.uk/modules/send/s3/index.test.ts
@@ -53,6 +53,14 @@ describe(`uploading an application to S3`, () => {
         slug: "unsupported-team",
       },
     });
+
+    queryMock.mockQuery({
+      name: "CreateS3Application",
+      matchOnVariables: false,
+      data: {
+        insertS3Application: { id: 1 },
+      },
+    });
   });
 
   it("requires auth", async () => {
diff --git a/api.planx.uk/modules/send/s3/index.ts b/api.planx.uk/modules/send/s3/index.ts
index f301729334..39aed61780 100644
--- a/api.planx.uk/modules/send/s3/index.ts
+++ b/api.planx.uk/modules/send/s3/index.ts
@@ -1,16 +1,19 @@
+import axios from "axios";
 import type { NextFunction, Request, Response } from "express";
+import { gql } from "graphql-request";
 import { $api } from "../../../client";
+import { Passport } from "../../../types";
 import { uploadPrivateFile } from "../../file/service/uploadFile";
 import { markSessionAsSubmitted } from "../../saveAndReturn/service/utils";
-import axios from "axios";
 import { isApplicationTypeSupported } from "../utils/helpers";
-import { Passport } from "../../../types";
 
-export async function sendToS3(
-  req: Request,
-  res: Response,
-  next: NextFunction,
-) {
+interface CreateS3Application {
+  insertS3Application: {
+    id: string;
+  };
+}
+
+const sendToS3 = async (req: Request, res: Response, next: NextFunction) => {
   // `/upload-submission/:localAuthority` is only called via Hasura's scheduled event webhook, so body is wrapped in a "payload" key
   const { payload } = req.body;
   const localAuthority = req.params.localAuthority;
@@ -58,8 +61,7 @@ export async function sendToS3(
     );
 
     // Send a notification with the file URL to the Power Automate webook
-    let webhookResponseStatus: number | undefined;
-    await axios({
+    const webhookRequest = {
       method: "POST",
       url: powerAutomateWebhookURL,
       adapter: "http",
@@ -73,10 +75,49 @@ export async function sendToS3(
         file: fileUrl,
         payload: doValidation ? "Validated ODP Schema" : "Discretionary",
       },
-    })
-      .then((res) => {
-        // TODO Create & update audit table entry here
+    };
+    let webhookResponseStatus: number | undefined;
+    await axios(webhookRequest)
+      .then(async (res) => {
         webhookResponseStatus = res.status;
+
+        // Mark session as submitted so that reminder and expiry emails are not triggered
+        markSessionAsSubmitted(sessionId);
+
+        // Create an audit entry
+        const applicationId = await $api.client.request<CreateS3Application>(
+          gql`
+            mutation CreateS3Application(
+              $session_id: String!
+              $team_slug: String!
+              $webhook_request: jsonb!
+              $webhook_response: jsonb = {}
+            ) {
+              insertS3Application: insert_s3_applications_one(
+                object: {
+                  session_id: $session_id
+                  team_slug: $team_slug
+                  webhook_request: $webhook_request
+                  webhook_response: $webhook_response
+                }
+              ) {
+                id
+              }
+            }
+          `,
+          {
+            session_id: sessionId,
+            team_slug: localAuthority,
+            webhook_request: webhookRequest,
+            webhook_response: res,
+          },
+        );
+
+        return {
+          application: {
+            ...applicationId.insertS3Application,
+          },
+        };
       })
       .catch((error) => {
         throw new Error(
@@ -84,9 +125,6 @@ export async function sendToS3(
         );
       });
 
-    // Mark session as submitted so that reminder and expiry emails are not triggered
-    markSessionAsSubmitted(sessionId);
-
     return res.status(200).send({
       message: `Successfully uploaded submission to S3: ${fileUrl}`,
       payload: doValidation ? "Validated ODP Schema" : "Discretionary",
@@ -100,4 +138,6 @@ export async function sendToS3(
       }`,
     });
   }
-}
+};
+
+export { sendToS3 };
diff --git a/hasura.planx.uk/metadata/tables.yaml b/hasura.planx.uk/metadata/tables.yaml
index 49a7278c64..a20b9f2d82 100644
--- a/hasura.planx.uk/metadata/tables.yaml
+++ b/hasura.planx.uk/metadata/tables.yaml
@@ -1414,6 +1414,46 @@
     - role: api
       permission:
         filter: {}
+- table:
+    name: s3_applications
+    schema: public
+  insert_permissions:
+    - role: api
+      permission:
+        check: {}
+        columns:
+          - id
+          - webhook_request
+          - webhook_response
+          - session_id
+          - team_slug
+          - created_at
+      comment: ""
+  select_permissions:
+    - role: api
+      permission:
+        columns:
+          - id
+          - webhook_request
+          - webhook_response
+          - session_id
+          - team_slug
+          - created_at
+        filter: {}
+      comment: ""
+  update_permissions:
+    - role: api
+      permission:
+        columns:
+          - id
+          - webhook_request
+          - webhook_response
+          - session_id
+          - team_slug
+          - created_at
+        filter: {}
+        check: null
+      comment: ""
 - table:
     name: sessions
     schema: public
diff --git a/hasura.planx.uk/migrations/1720597665798_create_table_s3_applications/down.sql b/hasura.planx.uk/migrations/1720597665798_create_table_s3_applications/down.sql
new file mode 100644
index 0000000000..d2db0a6dcf
--- /dev/null
+++ b/hasura.planx.uk/migrations/1720597665798_create_table_s3_applications/down.sql
@@ -0,0 +1 @@
+DROP TABLE "public.s3_applications" CASCADE;
diff --git a/hasura.planx.uk/migrations/1720597665798_create_table_s3_applications/up.sql b/hasura.planx.uk/migrations/1720597665798_create_table_s3_applications/up.sql
new file mode 100644
index 0000000000..b5995aeb1c
--- /dev/null
+++ b/hasura.planx.uk/migrations/1720597665798_create_table_s3_applications/up.sql
@@ -0,0 +1,11 @@
+CREATE TABLE "public"."s3_applications" (
+    "id" serial NOT NULL, 
+    "session_id" text NOT NULL,
+    "team_slug" text NOT NULL,
+    "webhook_request" JSONB NOT NULL,
+    "webhook_response" JSONB NOT NULL,
+    "created_at" timestamptz NOT NULL DEFAULT now(),
+    PRIMARY KEY ("id")
+);
+
+COMMENT ON TABLE "public"."s3_applications" IS 'Stores a receipt of applications submitted using the Upload to AWS S3 method with notifications via Power Automate webhook';