For agencies · part of audit servicesSelling a tracking audit to a client you already have
It is the easiest audit to sell and the hardest one to raise, and the obstacle is not the price.
The obstacle is that you may have built the tracking. Proposing to audit it can sound like either an admission or an upsell, and most people would rather not find out which, so the conversation never happens and the setup quietly rots. Which is a shame, because an existing client is the cheapest audit you will ever deliver: no pitch, no onboarding, no three weeks waiting for access, and you already know the site.
Four openings that are not accusations
The trick is to attach the audit to an event rather than to a suspicion. Each of these gives an honest reason to look now, and none of them require anybody to have done anything wrong.
1. Something on the platform changed
Google changed consent requirements again, or the CMP was updated, or a theme release went out. Any of these is a reason to check rather than an accusation that something is broken.
This is the cleanest opening because the trigger is external. Nobody is implying anybody made a mistake, and platform changes genuinely do break tracking, so the premise is honest rather than a device.
2. The spend is about to go up
Before we put another thirty thousand through this channel, it is worth confirming the conversion data the bidding will optimise against is correct.
The strongest commercial framing available, because the audit fee is trivially small against the budget it protects, and the client can see that without being told. Use it whenever a budget increase is being discussed.
3. Two systems disagree
Your Ads conversions and your GA4 conversions do not agree, and before we explain the difference we should establish which parts of it are expected.
Half of that gap is always by design and half of it may not be, and an honest answer requires a look at the setup. It is the most common reason anybody goes looking for an audit in the first place. See what causes that gap.
4. Annual planning
Before we set next year's targets on these numbers, we should check the numbers.
Low drama, easy to schedule, and it naturally becomes a yearly fixture rather than a one-off. The least urgent of the four and the easiest to repeat.
Scoping it so it stays an audit
Fixed fee, named deliverable, written boundary
Say in the proposal what the audit covers, what it produces, and explicitly that fixing anything it finds is separate work quoted afterwards. Without that sentence the audit becomes the first unpaid hour of an unscoped project, which is how agencies end up resenting their own best service.
Price it below a cold engagement
The relationship is already paid for: no pitch, no onboarding, no access wrangling, and you know the site. Charging the same as a cold project is hard to justify and easy for the client to notice. Discount it honestly and say why.
Agree who receives it before you start
An audit delivered to the person who commissioned the tracking is a different conversation from one delivered to their finance director. Know which you are writing before you write it, because it changes the tone of everything.
Timebox it
A day, two at most, for a standard setup. Audits expand to fill whatever time they are given, and an audit that takes three weeks has stopped being an audit and become a project nobody approved.
When the findings are yours
Sooner or later an audit of your own work finds your own mistake. How that is handled decides whether audits become a recurring part of the relationship or a thing you quietly stop offering.
Say it first, before the client reads it. Separate plainly what you inherited from what happened on your watch, fix your own at no charge, and quote for the rest. A client who watches you find and own your own error will trust the next audit more than the one before it. A client who finds it themselves in your document will wonder what else is in there.
Make the second one automatic
Close the handover by agreeing when you will look again. Annually is the sensible baseline, plus any replatform, consent change or significant new channel. Put the date in the document rather than in your own notes, so the client is expecting it and you are not selling from scratch twelve months later.
The re-audit is faster and cheaper than the first, because you know the setup and most of it has not moved, which makes it the highest-margin recurring work available in a retainer. Price it at roughly half and it will still be worth more per hour than the original.
Tracking Auditor is what makes the economics work on a client you already have: the detection takes two minutes, the Doc and Sheet come out under your branding, and you spend your time on the judgement and the conversation. £79 an audit, no subscription.
Run a free audit →FAQs
How do I sell an analytics audit to an existing client?
Attach it to an event rather than raising it cold: a platform or consent change, a budget increase, a disagreement between two reporting systems, or annual planning. Each gives an honest reason to look now, and none of them imply anybody made a mistake, which is the real obstacle rather than the price.
Isn't proposing an audit admitting the tracking might be broken?
Only if you frame it as suspicion. Tracking degrades on its own: platform changes, theme releases, new tags added by other teams, consent requirements that moved. Presenting a periodic check as maintenance rather than investigation is accurate, not spin, and it is the framing that makes the second and third audit sellable too.
What if the audit finds problems I caused?
Say so first, before anyone finds it in the document, and separate what you inherited from what happened on your watch. Fix your own free and charge for the rest. Clients forgive mistakes that are owned quickly and rarely forgive the discovery that you knew and did not say.
What should I charge an existing client for an audit?
Less than a cold engagement, because the relationship, the onboarding and the site knowledge are already paid for. The observable UK day rate is roughly £450 to £1,000, and a standard audit is one to two days of work, so build from there and discount visibly rather than quietly.
How often should a client's tracking be audited?
Annually as a baseline, and additionally whenever the site is replatformed, the consent setup changes, or a significant new channel starts. The annual version is faster and cheaper than the first one, because you already know the setup, which makes it the easiest recurring work in the relationship.