A website redesign can leave your Google Ads campaigns running while the conversions they depend on stop being recorded. If real enquiries or purchases are still arriving but Google Ads shows a sudden drop after launch, investigate measurement before paying for another redesign or changing your advertising strategy.
The first job is to establish whether customers stopped converting, whether the website stopped delivering enquiries, or whether the new site simply stopped reporting successful actions. Those are different failures with different costs.
For initial professional scoping in 2026, I would allow roughly $300–$900 for a contained measurement audit and isolated repair, $1,000–$3,500 for multi-page lead tracking restoration, and $3,500–$9,000+ for complex ecommerce, CRM, consent and cross-domain recovery. These are my illustrative project allowances, not surveyed market averages or fixed quotations. A single missing tag may take much less work; a broken checkout plus duplicated purchase reporting can take substantially more.
First, compare actual leads with reported conversions
Before changing tags, compare the same dates on both sides of the redesign:
| Evidence | What to check |
|---|---|
| Google Ads | Clicks, conversion actions, reporting dates and recent changes |
| Website | Live form submissions, calls, bookings and completed purchases |
| Inbox, CRM or order system | Whether real customers arrived and were recorded |
| GA4 and Tag Manager | Whether successful actions emit the intended events |
| Launch history | Domain changes, new thank-you pages, new forms, scripts, consent banner or GTM container |
If the CRM still has qualified leads but Ads shows zero, start with measurement. If both the CRM and Ads have dropped, test the customer journey and ad targeting as well. A dashboard discrepancy alone cannot prove that sales were lost.
This is different from a landing page that genuinely attracts clicks but no enquiries. My Google Ads landing-page conversion diagnosis addresses that wider problem; this guide is about restoring tracking after a technical website change.
What usually breaks during a redesign?
The new pages no longer load the correct tag. A developer may replace the website’s HTML layout, omit the old Google Tag Manager container, or deploy a new container without the production triggers. Google’s Tag Diagnostics identifies problems including missing tags, untagged landing pages and missing conversion linkers.
The conversion trigger still points to the old journey. Perhaps the old form redirected to /thank-you, but the new form displays an inline success message. A URL-based conversion rule can no longer see that action. A button click is not an acceptable substitute for a successfully delivered enquiry.
The event fires, but the wrong account receives it. The redesign may introduce a different GA4 property, Ads conversion ID, label or GTM container. Check the destination of the event rather than assuming that a green preview indicator means Google Ads is receiving the right signal.
The site counts the same conversion twice. A CMS plugin, hard-coded tag and GTM tag can overlap. Likewise, an imported GA4 key event and a native Ads conversion action can represent the same lead. Review which actions are primary for bidding and which are secondary observations; Google’s conversion measurement guidance distinguishes these roles.
Consent or redirects changed. A new consent banner can prevent or alter measurement, while a redirect can drop an ad-click identifier. Neither is a reason to bypass consent. Google’s consent-mode implementation guidance explains default and updated consent states, including ad_storage and ad_user_data.
A repair sequence that produces evidence
1. Preserve the old configuration
Export or document the current Tag Manager container and its published version, Google Ads conversion actions, linked GA4 property, form endpoints and relevant account access. Keep a record of the redesign release and affected URLs. Do not delete historical conversion actions or replace the GA4 property merely to make the dashboard look clean.
If a previous developer managed the tags, confirm that the business controls the accounts. The same principle applies to the domain, hosting and source-code ownership.
2. Test one real business outcome
Use a safe test enquiry or transaction. Confirm that the form reached its server, the message reached the business or the order was recorded, and a success state appeared only after the action actually succeeded.
For lead generation, Google’s recommended GA4 events include generate_lead. The event should represent a genuine generated lead, not simply opening a form or pressing Submit while validation fails.
If the form claims success but nobody receives the message, fix the form-delivery failure before claiming tracking is repaired.
3. Follow the event through every layer
Use Tag Manager preview and Tag Assistant to inspect the published container, tag triggers and firing order. Then use GA4 DebugView to check whether the intended event and parameters arrive in Analytics.
Finally, check the relevant Google Ads conversion action, linked data source and diagnostics. A tag firing in the browser is one checkpoint, not proof of a correctly attributed Ads conversion. Reporting and attribution can have delays; distinguish a test signal from a final campaign report.
4. Check consent, redirects and duplicate signals
Test the journey on mobile and desktop, with appropriate consent choices, across any form or checkout domain transitions. Confirm that legitimate redirects preserve the click information needed for attribution where permitted. If the business uses both GA4-imported and native Ads conversion actions, ensure the bidding setup does not treat the same enquiry as two independent primary successes.
For ecommerce, use a unique transaction or order reference and verify the purchase against the order system. A thank-you page refresh should not manufacture a second purchase.
5. Validate the repaired journey and hand it over
A useful acceptance report should show a test matrix: successful and failed forms, duplicate submission, mobile flow, consent behavior, redirect path, GTM preview, GA4 event receipt, Ads diagnostics and CRM/order reconciliation. It should name the business owner of every account, the deployed container version and the rollback procedure.
Do not accept “tracking installed” as the deliverable. Accept a verified chain from completed customer action to the correct measurement destination.
What does conversion-tracking repair cost?
| Repair scope | My 2026 planning allowance | Typical work |
|---|---|---|
| Isolated missing tag or broken trigger | $300–$900 | Audit, correct one implementation and test |
| Multi-page lead-generation website | $1,000–$3,500 | Several forms, calls, GTM/GA4/Ads mapping and handoff |
| Ecommerce, CRM or cross-domain recovery | $3,500–$9,000+ | Revenue values, consent, multiple systems, deduplication and reconciliation |
| Ongoing measurement monitoring | Separately scoped | Periodic checks, release regression tests and reporting |
These figures are a scoping framework, not a claim about average market prices. Ask a developer to quote diagnosis separately from implementation. A business with one broken form should not buy a new analytics architecture; a company spending heavily on ads across multiple conversion journeys should not accept a fix demonstrated only on a homepage.
The bigger commercial risk is making advertising decisions using unreliable data. Under-counting can make effective campaigns look unprofitable. Over-counting can make poor campaigns look successful. Neither outcome is solved by adding more pixels.
Repair the tracking, redesign the journey, or rebuild the website?
Repair tracking when customers can still complete the intended action, the site is maintainable and the fault is limited to tags, events, consent wiring, account links or attribution.
Repair the customer journey when submissions fail, bookings do not persist or purchases are not reliably recorded. That is a product or backend defect, not merely an analytics problem.
Consider rebuilding only when the underlying platform repeatedly prevents reliable integrations, secure account ownership or maintainable releases. A redesign that omitted GTM is not, by itself, evidence that the website needs another rebuild. My website repair versus redesign guide helps separate those decisions.
If you are planning another launch, put measurement into the website handover checklist so the same failure is not repeated.
What to send a developer before requesting a quote
Provide the website URL, approximate redesign date, which conversion actions dropped, whether real leads or orders still arrive, the platform used, and which accounts the business controls. Grant appropriately scoped access rather than sending passwords or private API keys. A useful first engagement is a short diagnosis that identifies the failed link and the minimum safe repair.
If Google Ads conversions stopped after your redesign, contact me with the site and the symptoms. I can assess whether the problem is measurement, the enquiry flow or the underlying website, and scope a repair without selling you an unnecessary rebuild. For wider implementation work, see my web design and website repair services.
