Ask five Amazon PPC agencies what they charge and you will get five different structures before you get a number. That is not evasion; the structures genuinely differ, and each one changes what the agency is paid to do. Understanding the models is more useful than any single price, because the model tells you how the agency's incentives line up with yours.
The four pricing models
Flat monthly retainer
A fixed fee for a defined scope: a number of campaigns or products, a review cadence, a reporting schedule. Simple to budget. The agency's incentive is to keep the account stable with the fewest hours, which is fine if the scope is right and a problem if your account needs more attention than the scope allows. Retainers usually come in tiers by account size.
Percentage of ad spend
The agency takes a percentage of what you spend on ads each month. Common, and easy for agencies to scale. The incentive is clear: the agency earns more when you spend more. That can be fine when growth is the goal and there is an ACoS or profit target in the agreement to keep spend honest. It can be a quiet problem when the account would be better served by spending less. At meaningful spend levels, this model gets expensive fast, since the fee grows with your budget while the work does not grow at the same rate.
Performance-based
The fee is tied to results: a share of ad-attributed sales, a bonus for hitting an ACoS target, or a reduced base with upside. Attractive in theory. In practice, attribution on Amazon is loose enough that performance fees need careful definitions, and agencies offering them tend to be selective about which accounts they take, since they are betting on the account. Read the definitions before the headline rate.
Hybrid
A base retainer plus a percentage, or a retainer plus performance bonus. The most common structure at mid-size agencies. The base covers the agency's fixed cost of attention; the variable part aligns some of the fee with your growth. Judge the base and the variable separately.
What sits outside the quoted fee
Ad spend is always separate, and the fee is on top. Beyond that, the common add-ons:
Setup or restructuring fees. A one-time charge to rebuild the account before management starts. Often justified if the account is a mess; worth questioning if the account is already structured.
Software pass-through. Some agencies run a platform and bill its cost to you, sometimes marked up. Ask whether the tool fee is included and whether you keep access to it.
Additional marketplaces or ad types. A retainer quoted for Sponsored Products in one marketplace may not cover Sponsored Brands, Sponsored Display, or a second country.
Your own time. Reviewing reports, approving changes, answering questions. A good agency minimizes this; a weak one turns you into the project manager.
Get the all-in monthly figure at your current spend and at the spend you expect in a year. The second number is where percentage models separate from flat ones.
What you are buying, and what it costs another way
A management retainer bundles several kinds of work, and the honest way to evaluate the price is to ask what each part costs on its own. This breakdown of what a management service does goes through them; the short version:
Structure and strategy. Deciding how the account should be built and what it should be trying to do. This needs a person with experience, and paying for it makes sense. As a one-time project or a quarterly session, it costs a fraction of a continuous retainer.
Daily execution. Bids, budgets, schedules, negatives. This is most of the hours in a retainer, and it is work that rule-based software does every day for a flat fee that is usually far below the labor it replaces.
Reporting. The console does most of this. A narrative for stakeholders takes some time but not a retainer.
When you line them up, a full-service retainer often costs more than buying the strategy from a consultant and running the execution on software, and the execution is usually better because it happens daily instead of weekly. That does not make retainers wrong; it makes the comparison worth doing before signing.
Questions to ask about any quote
What is the all-in figure at my spend, including software and any add-ons?
If my spend doubles, what does the fee become?
What does the agency do between weekly reviews? Specifically, how are overnight hours, event ramps, and budget caps handled on the days nobody is looking?
What is the notice period, and what do I keep when I leave?
Is there an ACoS, profit, or growth target in the agreement, and what happens if it is missed?
The agencies worth hiring answer these without hesitation. What sets the best agencies apart covers the rest of the evaluation.
When the price is worth it
A retainer earns its cost when the account needs sustained expert attention: a restructure that will take months, a multi-product launch, a team that genuinely has no time and a budget that makes the fee small by comparison. It also earns its cost when the agency is clearly running software for the execution and spending its hours on things that need judgment.
It stops earning its cost when the account is stable and the fee is mostly paying for a weekly bid review and a monthly chart. That is the point where most sellers are better off with software for the daily work and a consultant on call.
Frequently asked questions
What is a typical Amazon PPC agency fee?
There is no single typical fee, because agencies price by retainer, by percentage of spend, by performance, or by a mix, and the figures vary widely with account size and agency type. The useful question is what each model costs at your current spend and at the spend you expect in a year, since percentage models grow with your budget and flat models do not.
Is percentage-of-spend pricing bad?
Not inherently, but it means the agency earns more when you spend more, which is not the same as when you spend well. It works best when there is a clear ACoS or profit target in the agreement so the incentive to raise spend is balanced by accountability for results.
What costs are not included in an agency fee?
Ad spend itself is always separate. Beyond that, watch for setup or restructuring fees, software fees passed through, charges for additional marketplaces, and the cost of your own time in reviewing reports and approving changes. Ask for the all-in monthly figure at your spend level.
Off Hours is priced flat, not as a share of your spend, and covers the daily execution that fills most of an agency retainer. Start a free 14-day trial.