Retainers price the work, performance deals price an outcome. For most brands under $50,000 per month in profit, a retainer is the safer structure, because performance pricing needs a stable baseline and an agreed metric. Score both against six criteria before you pick, and check what each one pays for at launch.
The short version
- Retainer: fixed monthly amount, predictable, indifferent to how much of your money gets spent.
- Performance: a share of revenue or profit, aligned in growth phases and badly misaligned during rebuilds.
- The threshold that matters: we only take revenue share above $50,000 per month in profit, at 10 to 20 percent with no fixed fee.
- The metric decides everything. Share of revenue and share of profit are different products wearing the same name.
- Score, do not shop. Six weighted criteria beat a side-by-side of two monthly numbers.
Decide this before you compare quotes
Pick the structure by the job, not by the price. If the account needs a rebuild, listing work, creative, catalog repair, and a decision about which products to keep, choose a retainer. That work depresses revenue before it lifts it, and a performance deal makes your agency financially allergic to doing it.
If the account is stable, the listings are sound, and the job is to scale what already converts, performance pricing can work and can be the cheaper option for you.
The reason to settle this first is that the two structures are not comparable on price. One is an hourly commitment wearing a monthly wrapper, the other is a claim on your upside. Comparing $1,500 a month against 12 percent of revenue tells you nothing until you know which job you are buying.
The scorecard
Weight these to your own situation, score each model out of 5, and multiply.
| Criterion | Weight | Retainer scores well when | Performance scores well when |
|---|---|---|---|
| Predictability of cost | 20% | Cash is tight and forecasting matters | Never, by definition |
| Alignment during a rebuild | 20% | Foundations need fixing first | The foundations are already sound |
| Alignment during growth | 15% | The agency is disciplined without incentive | Volume is the only lever left |
| Attribution clarity | 15% | Nothing to dispute, the fee is the fee | The metric is profit and both sides see it |
| Cost at scale | 15% | Revenue is large relative to a fixed fee | Revenue is modest and a fixed fee bites |
| Exit friction | 15% | Notice is short and nothing trails you | The share ends cleanly at termination |
Two criteria decide most cases. Predictability matters more than people admit when a brand is under $1 million in revenue, and exit friction matters more than anyone checks. A performance deal with a tail clause, where the agency keeps earning on sales after the relationship ends, is the single most expensive thing you can sign without noticing.
The question that separates the two structures
Ask any candidate for two ACoS numbers: the one they target at launch and the one they target at maturity. The target changes by product stage, and it has to. At launch you are buying rank and review velocity, so ACoS runs high on purpose. At maturity you are defending a position and harvesting demand, so it should be materially lower.
An agency that gives one number for both is not managing to a stage, and neither structure protects you from that. Under a retainer you pay for a policy that ignores your product lifecycle. Under a performance deal you pay a share of revenue that was bought with your own margin.
This is where I place my own credibility. About 50 operators at Flapen do this work in-house, and the stage targets are set per product at onboarding, not per account. If a candidate cannot describe how their target moves between launch and maturity, the pricing conversation is premature.
Where a hybrid fits
A reduced retainer plus a share above a documented threshold is often the honest middle. It needs three things in writing: the baseline the share applies above, the metric, and the end date of the share after termination. The metric is profit, not revenue. Without all three, the hybrid is a retainer with an open-ended surcharge.
Our own version of this is deliberately narrow. Below $50,000 a month in profit, we charge a flat fee only, from $800 for one product to $2,400 for five, with all 50-plus services included at every tier, no commission and no onboarding fee. Above that line, revenue share at 10 to 20 percent replaces the fee rather than sitting on top of it.
What most agencies will not tell you
Performance pricing sounds like risk transfer and usually is not. The agency's downside is a month of unpaid work, while yours is a year of ad spend, inventory, and rank you cannot get back. The risk was never symmetrical, and the pricing rarely reflects that.
The other thing: on a percentage-of-revenue deal, the fastest way to raise the agency's income is to cut your price. Volume goes up, revenue goes up, their share goes up, and your margin goes down. If you sign one, put the share on profit or accept that you have paid someone to discount your catalog.
Related answers
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- Fixed fee vs rev share for Amazon agencies
- Month-to-month vs annual Amazon contracts
- Contract terms to negotiate with Amazon agencies
- Amazon agency pricing and economics: the complete guide
Every tier and term we offer is published rather than quoted privately, at Flapen.
