Tracking audit: How often should you have Analytics and Tag Manager checked?

A full tracking audit makes sense once a year, a quick check once a quarter. On top of that, you should check after every major change: a new consent banner, a relaunch, a new form, a new shop system or a change of agency. Tracking rarely breaks with an error message. Usually data simply goes missing without anyone noticing, and budgets are steered on the wrong basis for weeks.

What a tracking audit checks

1. Consent: Do tags only fire after consent, and does Consent Mode work correctly?
2. Conversions: Are forms, calls, purchases and appointment bookings counted exactly once?
3. Reconciliation: Do enquiries in GA4, Google Ads and the CRM roughly match?
4. Tag Manager: Are there old, duplicate or unknown tags?
5. Campaign attribution: Do UTM parameters and click IDs arrive, or does a lot end up under “Direct” and “(not set)”?
6. Access: Who has admin rights, and do the accounts belong to your company?
7. Data protection: Does the privacy policy match what is actually collected?

Reasons for an immediate check

• Conversions in Google Ads suddenly drop, even though the phone rings just as often.
• The number of users in GA4 collapses or doubles.
• A new cookie plugin or a new version of it was installed.
• The website got a new theme, new forms or a new checkout.
• Google Ads shows warnings about Consent Mode or conversions.

What an audit costs and what it saves

Depending on scope, an audit takes a few hours to a few days. Compare that with this: just one month of double-counted conversions can distort automated bidding strategies so much that a large share of the budget flows into the wrong campaigns.

Ongoing monitoring instead of a one-off check

Better than an annual audit is automated monitoring: alerts when conversions fall below a threshold, and a monthly reconciliation with the CRM. That way, errors are spotted within days, not months.

Related reading: Enhanced conversions: When are they worth it, and what do you need? and Offline conversions: How do closed deals from the CRM get back into Google Ads?

FAQ

Can I run a tracking audit myself?

You can do a first check yourself. Preview mode in Google Tag Manager shows which tags fire on a test enquiry, DebugView in GA4 shows the incoming events, and Google Ads reports the status of every conversion action under Goals. Consent behaviour, data protection and reconciliation with the CRM usually require experience with typical failure patterns.

What access is needed for a tracking audit?

At minimum, read access to GA4, Google Tag Manager and Google Ads, plus access to the consent tool or its settings. For reconciliation, an export of enquiries or deals from the CRM for the same period is helpful. Edit rights are not needed for the audit itself, only for implementing fixes.

What do you get at the end of a tracking audit?

The result is a prioritised list of findings: what is counted incorrectly, what is missing and what needs fixing from a legal point of view. It is also worth documenting which tags, events and conversions exist and what they are for. That documentation makes later checks and changes much easier.

When to hand this over

• Nobody in the company knows what is set up in Tag Manager.
• The figures in GA4, Google Ads and the CRM differ widely.
• The agency that set up the tracking is no longer responsible for it.

We audit tracking and consent and set up ongoing monitoring. Learn more about strategy & analysis or book a free initial consultation.