Suspicion Isn’t Evidence

Most owners who contact me already suspect something. They’ve read the reports, looked at the bank statement, and felt the gap between the two.

Suspicion isn’t the problem. The problem is that it gives you nothing to act on. You can’t take a feeling into a meeting and expect anything to change. The agency will tell you the market is competitive, that results take time, that the trend is positive. All of it might even be true. You’ve got no way to test it.

What you need is a record: what was done, what wasn’t, and what it cost. That record is what a marketing audit produces, and everything else follows from having it.

This guide covers what to check, in what order, what the answers mean, and how to decide between fixing the relationship and ending it. It assumes you spend at least £3,000 a month with an outside agency and you’ve started wondering where it goes.

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A Note on Tone, If You’ve Read the Rest of This Site

You may have downloaded my ebook, or read the posts on hidden fees and contract traps, and found them considerably harder on agencies than this page is. That’s deliberate, and both things are true at once.

The practices I write about elsewhere are real. I watched them from the inside for twelve years and I don’t soften them, because owners who don’t know those patterns exist can’t spot them.

But knowing the patterns and diagnosing your own account are separate jobs. Finding that your agency has been coasting isn’t the same as finding it’s beyond saving, and those two findings need completely different responses. Most owners who audit properly discover the first, then act as though they’ve found the second. That mistake costs more than the original problem.

So the rest of the site tells you what to look for. This guide tells you what to do once you’ve found it.

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Work Out What the Uncertainty Is Costing

Before the method, the arithmetic. Most owners delay a marketing audit because it feels like an admission, or like work. Both of those cost money while you decide.

Take your monthly figure. At £5,000 a month you spend £60,000 a year, and here’s roughly where it leaks:

• An undisclosed fifteen per cent markup: £9,000 a year
• One quarter of nobody optimising anything: a fifth of that quarter’s performance, so roughly £3,000
• Budget run flat through your seasonal peak: unquantifiable, and never itemised

None of these appear on an invoice. Every one of them appears in the platform data.

That’s the actual case for auditing. Not that your agency is dishonest, because usually it isn’t, but that nobody’s checking, and unchecked accounts drift in one direction only.

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The Four Questions a Marketing Audit Answers

Everything worth checking falls under one of four questions. Work through them in this order. Each answer makes the next one easier to read.

1. Where did the money go?

Reconcile three numbers:

• What you paid the agency
• What the platforms recorded as spend
• What the agency reported

In a clean relationship these agree, and the difference between the first two is the disclosed management fee.

The arithmetic takes ten minutes and almost nobody does it. Say you pay £5,750 a month. The agency reports £5,000 of media spend and a £750 management fee. You log into Google Ads and Meta, add up what the platforms actually charged you, and get £4,100. That £900 is the entire conversation, and you can’t open it until those three numbers sit side by side on one page.

What the answer means. A gap isn’t proof of anything on its own. It might be a currency conversion, a billing period that doesn’t align, or a platform credit. Ask for the explanation before you accuse anyone of anything, then note how long it takes to arrive. An agency that can explain a £900 difference in an hour has nothing to hide. One that needs a fortnight is building an answer rather than retrieving one.

For background on how these gaps form, read how agency pricing is structured and what markups typically look like.

2. Has anyone been working on it?

Every advertising platform keeps a change history. It records what was altered, when, and by which account. It can’t be edited after the fact, which makes it the only document in this process nobody can present selectively.

Read the shape of the activity, not the volume. Forty changes in one afternoon, three days before your quarterly review, isn’t management. It’s preparation for a meeting. An actively managed account shows small adjustments most weeks, larger ones when something breaks, and a visible record of things tried and abandoned.

What the answer means. Long gaps are the most common finding I see and the most fixable. They usually point to an overloaded account manager rather than a dishonest agency, and that distinction decides your next move. An overloaded manager responds to a written standard. A dishonest agency responds to leaving.

Read the signs of campaigns left on autopilot, then test your contact against the six questions any active manager can answer. One account I reviewed had run untouched for twelve years, which is what £170,000 of unchecked spend looks like.

3. Does the reporting match the platform?

Take the last three monthly reports and check each headline figure against the platform it came from. You’re not looking for fraud. You’re looking for selection.

Here’s the test that catches it. Write down which metric led each of the three reports. If the lead metric changes month to month, and each time it happens to be the one that improved, you’re reading a document built backwards from the result. Nothing in it is false. The sequencing is doing the lying.

What the answer means. Selective reporting is the easiest problem on this list to solve and the one owners tolerate longest. You fix it by specifying the report format yourself, which costs nothing and takes one email. If the agency resists being told which three numbers to lead with, that resistance is the finding.

Compare what you were shown against the metrics that actually move a business and learn how to read the commentary. Reports can improve for eighteen months while the money goes nowhere, which is how one company lost £75,000.

4. What does the contract let you do?

Findings are only as useful as your ability to act on them. Before you raise anything, know three dates and one fact:

• When your term ends
• When the cancellation window opens
• When it closes
• Whose name the advertising accounts are in

What the answer means. An owner who knows their cancellation date negotiates from a different position than one who doesn’t, and agencies can tell which one they’re speaking to within about a minute. If your window closes in five weeks, raise findings this week. If it closed a fortnight ago, you’ve got eleven months to build the case properly, and rushing now achieves nothing.

Check the clauses that matter, the renewal mechanics, and who actually owns your data.

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Run the Audit in This Order

Sequence matters more than thoroughness. Do these four things in this order and the rest follows.

1. Get access before you ask questions. Request admin access to every advertising and analytics platform first, framed as routine governance rather than suspicion. Say you’re tidying up supplier records. Asking afterwards turns a two-day admin task into a three-week negotiation.
2. Export before you discuss. Download performance history, audience definitions and conversion tracking setup while relations are normal. Data you already hold can’t be withdrawn. That isn’t paranoia, it’s the same logic as keeping your own copies of your accounts.
3. Read the change logs before the reports. The logs tell you what happened. The reports tell you what the agency chose to say about it. Read them in that order and the gaps announce themselves. Read them the other way round and you’ll spend the whole exercise trying to disprove a narrative.
4. Put the findings in writing. Specifics, dates, figures, no adjectives. A written record changes what happens next, because a refusal to answer in writing is itself an answer, and one you can use.

Work through the full checklist if you want the itemised version.

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What You’ll Probably Find

An audit produces one of three outcomes. Most owners walk in expecting the third. In my experience the first two turn up far more often.

The work’s happening and the reporting is poor. Change logs healthy, spend reconciles, campaigns managed by someone competent. You’ve simply never been shown any of it in a form you can read. This is the cheapest outcome available to you, and it’s more common than the industry’s reputation suggests. Fix the report format and the relationship recovers inside a month.

The work’s thin but the relationship is salvageable. Activity low, results flat, and nobody’s ever held the agency to anything specific. This is the most common finding by a distance. It’s also where owners most often make the expensive mistake, because thin work feels like betrayal and betrayal makes people leave. Thin work is usually capacity, not malice, and capacity responds to a written standard.

The relationship can’t be repaired. Access refused, figures that don’t reconcile with an explanation that keeps changing, or an agency disputing evidence taken from its own platform logs. That last one is decisive. An agency arguing with its own change history has told you everything. At that point the question becomes how to leave without losing what you’ve built.

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The Cost of Leaving Against the Cost of Staying

Switching isn’t free and nobody quotes you the price. Work it out before you decide, because most owners run this comparison with a number on one side and a feeling on the other.

• The notice period. Sixty or ninety days is common and some contracts run to a hundred and eighty. At £5,000 a month that’s £10,000 to £30,000 in fees for work you’ve already stopped valuing.
• The learning period. A new agency needs roughly a quarter before it’s making decisions from your data rather than its assumptions. Budget for three months of reduced performance, and be sceptical of anyone who promises otherwise in a pitch.
• What doesn’t transfer. Conversion history, audience seed lists, and the record of what’s already been tested and failed. The new agency will repeat some of those failed tests on your budget, because it has no way of knowing they were run.

Set that total against the cost of staying, which is whatever the audit found, multiplied by twelve.

Sometimes leaving wins that comparison outright. When it does, leave without hesitating. But run the comparison first, with both sides in pounds, because the alternative is making a five-figure decision on how a meeting made you feel.

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Turn Findings Into a Specification

A list of complaints changes nothing. It invites a debate about interpretation, and the agency wins that debate because it has the specialist knowledge and you have a business to run.

A specification changes behaviour, because it swaps judgement for a checkable standard. It moves the argument from whether the work is good enough to whether the number was hit.

A workable specification names four things:

• The metrics that define success, and the figure each must reach
• The activity you expect each month, stated as evidence rather than effort
• Who reviews the account, how senior they are, and how often
• The date you check all of it

The difference in practice looks like this. Weak: “improve lead quality.” Workable: “cost per qualified lead under £120 by month three, counted in the CRM rather than the ad platform, reported on the first working day of each month.” The second can’t be argued with. It can only be met or missed, and both of those outcomes are useful to you.

How to present it. Not as an ultimatum. Send it as the standard you’re adopting for all suppliers, ask whether anything in it is unreasonable, and invite them to propose alternative figures. An agency that engages with the numbers is one worth keeping. An agency that objects to the existence of numbers has answered a different question.

Good agencies welcome this. It tells them exactly what winning looks like, which most clients never manage to articulate, and it protects them from a client whose definition of success moves every quarter.

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Want the Specification Written for You?

I audit the account, then write the standard your agency works to. You keep both documents whether or not we work together again.

Request Your Free Assessment →

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Why One Audit Isn’t Enough

A marketing audit is a photograph. It tells you what was true in the month you looked.

Accounts drift, and they drift for ordinary reasons. Staff change. The person who tightened everything up after your conversation moves agency six months later and the standard goes with them. Attention migrates to whoever complained most recently. Nobody decides to neglect your account. It just stops being the loudest thing in the room.

Ongoing oversight solves a different problem from a one-off audit. The audit establishes what’s true. Oversight keeps it true. In practice that means someone reading the change logs monthly, reconciling spend against platform data, and telling you when the standard slips, while it’s still a conversation rather than a quarter of lost performance.

This is also the honest reason agencies improve under supervision, and it isn’t the reason people assume. It’s not that they were cheating and got caught. It’s that attention follows accountability. An account that gets checked gets worked on, and an account manager who knows a third party reads the logs each month allocates their limited hours accordingly. You’re not buying suspicion. You’re buying priority.

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When You Don’t Need Me

You can do the first three questions yourself. Platform access, a spreadsheet and an afternoon get you most of the way, and if your spend is under £3,000 a month that’s exactly what I’d do in your position.

Bring someone independent in when one of three things is true:

• You don’t know what normal looks like, so a gap or a quiet fortnight means nothing to you either way
• The numbers are large enough that being wrong is expensive in both directions, since firing a competent agency costs as much as keeping a poor one
• You need the finding to carry weight in a room, because an owner’s opinion is arguable and a third-party report is a document

If none of those apply, use the checklist and keep your money.

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Where I Fit

I ran an agency for twelve years. I know which questions produce answers and which produce a promise to check with the team, because I’ve sat on the other side of that table and given both kinds of reply.

I don’t sell marketing services. That’s the whole point. An agency reviewing another agency’s work has an obvious interest in the verdict, and the verdict is almost always that you should switch to them. I’ve got one job, which is telling you what’s actually happening in your account, and I’m equally content if the answer turns out to be that your agency is doing fine.

Keeping the agency you already have is a legitimate outcome of this process, and often the cheapest one. The point isn’t to talk you out of leaving. It’s to make staying or leaving a decision rather than a default.

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Start With the Assessment

Free, written, and yours to keep regardless of what you do next.

What you receive:

• Spend reconciled against platform records
• What’s been worked on, and when, from the change logs
• A written specification your agency can work to
• Contract terms worth renegotiating at your next window

What I need from you: three to six months of performance data, your current contract and reports, view-only platform access, and a sentence on what you’re trying to grow.

Best suited to UK businesses spending £3,000 or more each month with an external agency.

Request Your Free Assessment →