Short answer: Performance marketing agencies charge in five main ways: a percentage of ad spend, a flat monthly retainer, a hybrid of base fee plus a smaller percentage, a performance fee tied to revenue, leads or margin, and one-off setup or project fees. Most also set a monthly minimum. Each model rewards something different, so the right one depends on your spend level and what you can measure.
Key takeaways
- Percentage of spend is the most common model. In our experience it typically sits somewhere around 10 to 20 percent, often with a monthly minimum, and the percentage tends to fall as spend rises.
- A flat retainer is predictable but gets expensive relative to spend at low budgets and cheap at high budgets.
- Hybrid models (base fee plus a smaller percentage) are common once spend grows, because they cover fixed work and scale with complexity.
- Performance fees on revenue, leads or margin sound fair but only work when tracking is reliable and both sides agree on what counts.
- Every model has an incentive problem. Pick the one whose weakness you can monitor.
- Creative, landing pages and tracking setup are often billed separately. Ask what is in the fee before comparing quotes.
Two quotes for "managing your Google and Meta ads" can differ by a factor of three and still both be fair, because they are built on different fee models and cover different work. Comparing them on the headline number alone is the most common mistake we see.
This post explains how each model is calculated, with the same two example budgets so you can compare like for like, what each model quietly rewards, and how to tell which one fits your spend. The figures are examples to show the mechanics, not price lists. Market rates vary by country, channel mix and how much work sits behind the account.
What are the main fee models, and how is each calculated?
There are five building blocks, and most agency quotes are one of them or a combination. Below, each is shown at two example monthly ad budgets: €10,000 (a smaller account) and €60,000 (a larger one).
Percentage of ad spend
The agency charges a fixed share of what you spend on ads each month. The calculation is simple: monthly spend multiplied by the percentage. In our experience the percentage commonly sits somewhere around 10 to 20 percent, with smaller accounts towards the upper end and larger accounts towards the lower end, often on a sliding scale.
Most agencies pair this with a minimum monthly fee, because a small account still needs strategy, reporting and tracking checks. If the percentage works out below the minimum, you pay the minimum.
€10,000 spend
15 percent is €1,500, which is below the minimum, so the fee is €2,500. That is effectively 25 percent of spend.
€60,000 spend
15 percent is €9,000. On a sliding scale (say 15 percent on the first €20,000 and 10 percent above), it would be €3,000 plus €4,000, so €7,000.
Flat monthly retainer
A fixed fee each month, agreed in advance for a defined scope: channels, number of campaigns, reporting cadence, meetings. The fee does not move with spend, although it is usually reviewed if scope changes.
€10,000 spend
Fee is €4,000, which is 40 percent of spend. Heavy for the budget.
€60,000 spend
Fee is €4,000, which is under 7 percent of spend. Cheap, but ask whether €4,000 buys enough hours for an account this size.
Hybrid: base fee plus percentage
A fixed base covers the work that exists at any budget (strategy, reporting, tracking, meetings), and a smaller percentage of spend covers the extra work that comes with scale (more campaigns, more creative to test, more markets).
€10,000 spend
€2,000 plus €800 is €2,800, or 28 percent of spend.
€60,000 spend
€2,000 plus €4,800 is €6,800, or about 11 percent of spend.
Performance-based: revenue, leads or margin
The agency is paid on outcomes. The common versions are a percentage of attributed revenue, a fixed amount per qualified lead, or a share of contribution margin (revenue minus product costs, shipping, fees and ad spend). Pure performance deals are rare. Most agencies combine a reduced base fee with a performance element, because they carry real cost before results arrive.
€10,000 spend
At a return of 4 times spend, attributed revenue is €40,000. The fee is €3,200.
€60,000 spend
Return usually drops as you scale. At 3 times spend, attributed revenue is €180,000 and the fee is €14,400, even though efficiency fell.
A lead-based version works the same way: at €60 per qualified lead, 50 leads cost €3,000 in fees and 200 leads cost €12,000. The whole model depends on how "qualified" is defined.
Setup and project fees
A one-off fee at the start, or for a defined piece of work. Typical items are an account audit, a rebuild of campaign structure, conversion tracking and analytics setup, product feed work, or a landing page. Some agencies waive setup fees in exchange for a longer minimum term; others fold the work into the first months of the retainer. Neither is wrong, but you should know which you are getting.
How do the models compare at the same spend?
Put side by side, the same budgets produce very different fees. Using the examples above:
| Model (example terms) | Fee at €10,000 spend | Fee at €60,000 spend |
|---|---|---|
| 15 percent of spend, €2,500 minimum | €2,500 (25%) | €9,000 (15%) |
| Sliding scale, 15% then 10% above €20,000 | €2,500 (minimum applies) | €7,000 (about 12%) |
| Flat retainer, €4,000 | €4,000 (40%) | €4,000 (about 7%) |
| Hybrid, €2,000 plus 8% | €2,800 (28%) | €6,800 (about 11%) |
| 8% of attributed revenue | €3,200 (at 4x return) | €14,400 (at 3x return) |
Two things stand out. First, at low spend almost every model costs a large share of the budget, because the fixed work does not shrink with the budget. That is why minimums exist. Second, at high spend the models diverge sharply, so the choice of model matters more than the headline rate.
The useful number to compare is not the rate but the total cost of media plus fees against what that budget can return. If your ads need to return a certain amount just to break even, the fee is part of that hurdle. Our post on whether Google Ads are worth it walks through break-even maths if you want to check whether the numbers work at your margin.
Performance marketing services with a fee model you can read
We explain upfront what is included, what is not, and how the fee moves if your spend changes, so you can compare us fairly with anyone else.
See our performance marketing servicesWhat does each model reward, and where does the incentive break?
Every fee model pays the agency for something. The problem is that the thing it pays for is never exactly your profit. Knowing the gap tells you what to watch.
No model removes the conflict entirely. The practical question is which weakness you can see in your own data. If you track blended revenue and new customer acquisition cost each month, a percentage model is easy to police. If you have no reliable revenue data, a revenue share will turn into arguments about attribution.
If conversion tracking is broken or double-counting, a performance fee pays the agency for numbers that are not real. Fix and agree the measurement before you sign anything that pays on outcomes.
What is usually included in the fee, and what is billed extra?
The management fee usually covers the running of the ad accounts. Work that produces new assets is often billed separately. The split varies by agency, so treat the lists below as typical, not universal.
| Usually included in the monthly fee | Often billed extra or as a project |
|---|---|
| Campaign build and ongoing management within agreed channels | Creative production: new videos, photo shoots, designed ad sets beyond light edits |
| Bid, budget and audience changes | Landing page design and build |
| Keyword, search term and placement reviews | Initial tracking and analytics setup or a full rebuild |
| Ad copy and testing of existing creative | Product feed rebuilds and feed tools |
| Regular reporting and review calls | Adding a new channel or market |
| Basic monitoring of conversion tracking | Third-party tool subscriptions |
Two points catch people out. First, creative is the biggest lever on paid social, so a quote that excludes it may be cheaper on paper and more expensive in practice, once you pay a separate studio. Second, "tracking included" often means checking that existing tracking still fires, not building server-side tracking or fixing a broken setup.
When you compare quotes, ask each agency to answer the same short list:
Which fee model fits your spend level?
As a rule of thumb, the right model follows your budget and the quality of your data. The bands below are loose and depend on market and channel mix.
Smaller budgets, roughly up to €10,000 a month
You will usually pay a minimum fee or a flat retainer, and it will be a high share of spend. That is normal, not a sign of overcharging. The decision here is less about the model and more about whether the budget is big enough to justify outside management at all. If the fee would be more than a third of your spend, a narrower scope (one channel done well) usually beats two channels done thinly.
Mid-sized budgets, roughly €10,000 to €50,000 a month
Percentage of spend on a sliding scale, or a hybrid, tends to fit best. The work genuinely grows with spend, and the fee becomes a reasonable share of the budget. This is also where it pays to agree targets that any budget increase must hold, so the spend incentive stays in check.
Larger budgets, roughly above €50,000 a month
Straight percentages start to produce fees that outgrow the extra work. Expect to negotiate a lower tiered rate, a hybrid with a capped percentage, or a retainer sized to the team on the account. If your revenue and margin data are clean, a performance element on margin or new customer revenue can align things well, usually on top of a base fee rather than instead of one.
"At €30,000 monthly spend, the fee is €2,000 plus 8 percent, so €4,400. That covers Google search, shopping and Meta in Germany and Austria, four new static ads and two videos a month, and a monthly review. Tracking setup is a one-off €3,000. If spend doubles, the fee is €6,800."
"We charge 12 percent of spend, everything included." Included where, for which channels, and what happens to creative and tracking is left open.
The same logic applies whether the work is search or social. A PPC management services quote and a Meta ads services quote may use different models because the work behind them differs: search accounts lean on structure and bidding, Meta accounts lean on creative volume. If you are hiring a performance marketing agency to run both, ask for the fee split by channel so you can see where the money goes.
The fee model is one input into the hiring decision, not the whole of it. For the wider question of fit, see our guide on how to choose the right marketing agency.
Frequently asked questions
It should be calculated on actual spend as shown in the ad platforms for that month. Some agencies invoice on planned budget in advance and reconcile later. Either works, as long as the contract says which and how differences are settled.
Because a lot of the work is fixed: strategy, tracking checks, reporting and calls take similar time at €5,000 or €20,000 of spend. Without a minimum, small accounts would be run at a loss or given too little attention. A minimum is normal; what matters is whether it is proportionate to the scope.
Usually, yes. Doubling spend rarely doubles the work, so a sliding scale or a cap is reasonable to ask for. Agree the tiers at the start so the conversation does not happen in the middle of a scaling push.
They are when they pay for real work you would otherwise lack, such as fixing conversion tracking or rebuilding a messy account. Ask for a written list of deliverables. A setup fee with no defined output is just a higher first invoice.
It can be, if a lead is defined tightly (for example a booked call that meets agreed criteria) and checked against your CRM. Paying on raw form fills tends to reward cheap, low-intent volume that your sales team then has to filter out.
What to do next
Before you compare quotes, work out the fee each model would produce at your current spend and at double it, and what is excluded. That turns a confusing set of proposals into a like for like comparison.
- Write down your current monthly spend, target cost per acquisition or return, and how reliable your conversion data is.
- Ask every agency for the fee at your budget and at twice your budget, plus a list of what is billed extra.
- Choose the model whose incentive problem you can actually monitor with the data you have.
If you would like a second opinion on your account before deciding, we offer a free written audit within 48 hours.