---
title: Lost traffic source with PMS hosted checkout
description: "After switching to a PMS hosted checkout, your Google Ads conversions may still be counted but show no traffic source. **Why this happens.** This is…"
url: "https://homerunner.io/docs/google-ads-conversion-tracking-stopped-working-after-switching-to-a-pms-hosted-c/"
updated: "2026-10-26"
category: PMS connections and sync
---

# Lost traffic source with PMS hosted checkout

After switching to a PMS hosted checkout, your Google Ads conversions may still be counted but show no traffic source.

**Why this happens.** This is expected GA4 behavior. When guests leave your domain to complete their booking on the PMS checkout domain, GA4 treats this as a new session and drops the original traffic source.

**How to fix it.** Set up cross-domain measurement in GA4:

1. In GA4, go to **Admin**, then **Data Streams**.
2. Select your web stream.
3. Open **Configure tag settings**, then **Configure your domains**.
4. Add the PMS checkout domain alongside your own site domain.

After configuring, confirm that the purchase event still fires on the PMS confirmation page with a transaction ID. Then re-verify your Google Ads conversion actions, since attribution windows only apply from when the fix goes live.