Performance marketing agency cost is deliberately vague across the industry, and the vagueness benefits the agency. So here is what the models actually are, what each one costs you, and how to tell whether a number you have been quoted is reasonable.
The three models
Flat monthly retainer. A fixed fee regardless of spend. Set by how much work the account needs — channels running, markets, feed complexity, how much creative direction you want. This is what most competent agencies charge and what we charge.
Percentage of ad spend. Usually somewhere between 10% and 20%. Simple to quote and structurally dishonest: your agency earns more when you spend more, so the advice to cut a failing channel costs them money. When the right call is "reduce budget", a percentage model makes that advice expensive to give.
Performance or commission. Paid per lead or as a share of revenue. Sounds aligned and rarely is. It pushes an agency toward whatever converts fastest — remarketing, branded search, demand you already had — and toward claiming credit for sales that would have happened anyway.
Ask any agency quoting a percentage what happens when the honest recommendation is to spend less. The answer tells you everything.
What moves performance marketing agency cost up
- Channels. One platform is meaningfully cheaper to run than three.
- Markets and languages. Each one is a separate account structure, separate creative and separate reporting.
- Catalogue size. A feed with five products and one with eight thousand are different jobs.
- Tracking state. An account with clean measurement costs less to run than one that needs rebuilding first.
- Creative. Direction and copy are usually included. Production — shoots, motion, heavy editing — usually is not, and this is the most common hidden cost.
- Regulated categories. Finance, health and anything needing compliance review on every asset takes more time.
The ratio that matters more than the fee
Compare the fee to your ad spend. A fee that is a large fraction of the budget means most of your money is buying management rather than customers. Below a certain spend level, no agency arrangement makes sense at any fee — you are better off learning it yourself or waiting.
Our own floor comes from that arithmetic rather than from a round number, and we say so on the first call rather than after it. Below that an account cannot gather enough conversion data to optimise against, which the learning phase calculator will show you in about thirty seconds.
What should never be charged
Setup fees, onboarding fees, charges for an extra report or call, exit fees, and anything to hand back accounts you already own. If any of these appear in a proposal, ask why.
How to judge a quote
Ask for the scope in writing — what is included, what is extra. Ask what happens if you want to stop. Ask who specifically works on the account and how many other accounts they carry. A good agency answers all three without hesitating; the number itself is the least informative part of the conversation.
For Google specifically, what Google Ads management costs goes through the same three structures in more detail, including what tends to be excluded from a low quote.
We publish how we charge on our pricing page rather than making you ask, and we quote after a free audit rather than before, because the honest number depends on what the account actually needs.
Questions people ask
How much does a performance marketing agency cost?
It depends on the work rather than on your revenue: how many channels run, how many markets, catalogue size, and whether the tracking needs rebuilding first. What matters more than the headline figure is the ratio of fee to media spend — if management costs a large fraction of the budget, most of your money is buying attention rather than customers.
Is a percentage of ad spend normal?
Common, yes. Sensible, not really. It pays the agency more when you spend more, which makes "reduce this budget" an expensive sentence for them to say. Ask any agency quoting a percentage what happens on the day the honest recommendation is to spend less.
Should I pay a setup fee?
Only if it buys work the retainer clearly does not, itemised. A setup fee that simply describes the first month of normal account work is the first month billed twice.
What is usually not included?
Creative production — shoots, motion, heavy editing — landing page builds, new market launches, and tracking rebuilds. Direction and copy are normally in; production normally is not, and that is where most surprise invoices come from.