diff --git a/apps/revenue/stripe/stripe-saas-demo/backend/routes/checkout.ts b/apps/revenue/stripe/stripe-saas-demo/backend/routes/checkout.ts
index 6b1ecb095..18f61b6f1 100644
--- a/apps/revenue/stripe/stripe-saas-demo/backend/routes/checkout.ts
+++ b/apps/revenue/stripe/stripe-saas-demo/backend/routes/checkout.ts
@@ -1,5 +1,6 @@
 import { Router } from "express";
 import { stripe } from "../stripe";
+import { getUser } from "../users";
 import { posthog } from "../posthog";
 
 export const checkoutRouter = Router();
@@ -15,14 +16,20 @@ checkoutRouter.post("/", async (req, res) => {
     }
 
     const frontendUrl = process.env.FRONTEND_URL || "http://localhost:5173";
+    const posthogDistinctId = userId ? getUser(userId)?.posthogDistinctId : undefined;
+    const posthogMetadata = posthogDistinctId
+      ? { posthog_person_distinct_id: posthogDistinctId }
+      : undefined;
 
     const session = await stripe.checkout.sessions.create({
       mode: "subscription",
       line_items: [{ price: priceId, quantity: 1 }],
       success_url: `${frontendUrl}/dashboard?session_id={CHECKOUT_SESSION_ID}`,
       cancel_url: `${frontendUrl}/?canceled=true`,
-      client_reference_id: userId,
+      client_reference_id: posthogDistinctId,
       customer_email: customerEmail,
+      metadata: posthogMetadata,
+      subscription_data: { metadata: posthogMetadata },
     });
 
     res.json({ url: session.url });
diff --git a/apps/revenue/stripe/stripe-saas-demo/backend/routes/customers.ts b/apps/revenue/stripe/stripe-saas-demo/backend/routes/customers.ts
index b80152dbf..4355d26c8 100644
--- a/apps/revenue/stripe/stripe-saas-demo/backend/routes/customers.ts
+++ b/apps/revenue/stripe/stripe-saas-demo/backend/routes/customers.ts
@@ -24,6 +24,9 @@ customersRouter.post("/", async (req, res) => {
     const customer = await stripe.customers.create({
       email,
       name,
+      metadata: posthogDistinctId
+        ? { posthog_person_distinct_id: posthogDistinctId }
+        : undefined,
     });
 
     const user = existing
diff --git a/apps/revenue/stripe/stripe-saas-demo/backend/routes/subscriptions.ts b/apps/revenue/stripe/stripe-saas-demo/backend/routes/subscriptions.ts
index 37b533d37..3879fdae1 100644
--- a/apps/revenue/stripe/stripe-saas-demo/backend/routes/subscriptions.ts
+++ b/apps/revenue/stripe/stripe-saas-demo/backend/routes/subscriptions.ts
@@ -15,16 +15,17 @@ subscriptionsRouter.post("/", async (req, res) => {
       return;
     }
 
-    if (userId) {
-      const user = getUser(userId);
-      if (user) {
-        console.log(`Creating subscription for user ${user.email} (${user.id})`);
-      }
+    const user = userId ? getUser(userId) : undefined;
+    if (user) {
+      console.log(`Creating subscription for user ${user.email} (${user.id})`);
     }
 
     const subscription = await stripe.subscriptions.create({
       customer: customerId,
       items: [{ price: priceId }],
+      metadata: user?.posthogDistinctId
+        ? { posthog_person_distinct_id: user.posthogDistinctId }
+        : undefined,
       payment_behavior: "default_incomplete",
       payment_settings: { save_default_payment_method: "on_subscription" },
       expand: ["latest_invoice.payment_intent"],
diff --git a/apps/revenue/stripe/stripe-saas-demo/posthog-revenue-report.md b/apps/revenue/stripe/stripe-saas-demo/posthog-revenue-report.md
new file mode 100644
index 000000000..caa8fffa5
--- /dev/null
+++ b/apps/revenue/stripe/stripe-saas-demo/posthog-revenue-report.md
@@ -0,0 +1,33 @@
+# PostHog Revenue Analytics Setup
+
+## Changes made
+
+- Traced the project’s PostHog person identifier from `posthog.identify(email, …)` and the frontend’s `posthog.get_distinct_id()` value.
+- Added `posthog_person_distinct_id` metadata to new Stripe Customer objects when the identifier is available.
+- Added the same metadata to custom-flow Stripe Subscription objects using the identifier stored on the local user.
+- Added the identifier to Stripe Checkout Session metadata and the Checkout-created Subscription metadata.
+- Changed Checkout `client_reference_id` to use the PostHog distinct ID, allowing webhook processing to recover the same identity.
+- Configured the provided PostHog project token and host through frontend environment variables.
+- Added no Stripe API calls, packages, or unrelated payment-flow changes.
+
+## Files modified or created
+
+- Modified `backend/routes/customers.ts`
+- Modified `backend/routes/subscriptions.ts`
+- Modified `backend/routes/checkout.ts`
+- Created `frontend/.env` with `VITE_POSTHOG_API_KEY` and `VITE_POSTHOG_HOST`
+- Created `posthog-revenue-report.md`
+
+## Verification
+
+- Re-read all modified routes and confirmed metadata uses the existing PostHog distinct ID rather than a fabricated Stripe or internal identifier.
+- Confirmed the environment keys are present in `frontend/.env`.
+- Confirmed no new Stripe API operations or dependencies were introduced.
+- The backend package does not define a build, typecheck, or lint script, so verification was performed by targeted source review.
+
+## Manual next steps
+
+1. Run both the hosted Checkout and custom card subscription flows with Stripe test data.
+2. Confirm the resulting Stripe Customer, Checkout Session, and Subscription objects contain `posthog_person_distinct_id` metadata.
+3. Ensure the Stripe source is connected and syncing in the intended PostHog project, then allow the revenue tables and customer analytics views time to refresh.
+4. Keep `frontend/.env` local and out of version control; configure the same environment variables in the deployment platform.