How Amazon PPC agencies price, and what tooling should cost.

Every Amazon PPC agency sells the same thing, which is hours of attention on a seller's ad account, and almost every agency prices it differently. That matters twice. Once for the seller, who is comparing proposals that cannot be compared line by line. And once for the agency, whose own tooling bill is usually priced on a model that quietly works against its margin.

This post covers both halves: the four ways agencies charge, what each one rewards, and what the software underneath should cost an agency running ten, twenty or forty clients.

The four ways Amazon PPC agencies charge

1. A flat monthly retainer

A fixed fee per client per month, usually tied to a scope: number of campaigns, marketplaces, or hours. It is the easiest model to budget on both sides, and the only one where the agency is paid the same whether the client spends more or less on ads.

Its weakness is scope creep. A client who launches in three new marketplaces mid-contract is more work for the same fee, so retainers tend to come with a review clause.

2. A percentage of ad spend

The agency takes a share of what the client spends on Amazon ads each month. It scales with the account without renegotiation, which is why it is common. It also means the agency is paid more when the client spends more, not when the client earns more. Those two numbers often move in opposite directions, and we have written about why that conflict matters.

3. A minimum plus a percentage

The hybrid: a floor that covers the agency's cost of serving a small account, and a percentage above it. It protects the agency on small books and keeps the percentage incentive on large ones.

4. Performance-based fees

A fee tied to an outcome, such as a share of sales growth or a bonus for hitting a target ACoS. It sounds aligned. In practice the hard part is the baseline: seasonality, a new listing or a price change moves sales without any help from the ads, and both sides end up arguing about attribution instead of the account.

What the agency's own software costs

Whatever the agency charges, it pays for bid management software, and most of that software is priced the second way: as a share of the client's ad spend. As checked against the vendors' own pricing pages (2026-09-04 and 2026-09-30):

• Teikametrics: $179 a month ($149 on annual), plus 3% of ad spend above $10,000 a month.
• Perpetua: $695 a month, plus a percentage of spend above $10,000 that the pricing page does not state.
• Helium 10 Ads: 2% of all ad spend on managed profiles, on top of the Diamond plan.
• Pacvue publishes no prices at all; it is quote-only.

For an agency, a percentage-priced tool is a cost that grows with every client's budget. A client who doubles their spend in Q4 doubles the agency's tooling bill for that client, while the agency's own retainer usually stays where it was.

Working the margin

Take an agency with 20 clients, each spending €15,000 a month on ads, and charging each client a retainer of €1,500. Fees from clients: €30,000 a month.

• A tool at 3% of spend costs 20 × €15,000 × 3% = €9,000 a month. The agency keeps €21,000.
• Mirox on the Growth tier costs €2,430 a month for 20 clients, or €121.50 per client on average. The agency keeps €27,570.

The gap widens as client budgets grow, because one side of the comparison grows with spend and the other does not. It narrows for very small accounts: at low spend, a percentage of almost nothing is cheap. That is the honest shape of the comparison, and the margin calculator on our agency page lets you put in your own numbers.

How Mirox prices agencies

Per connected client account, per month, on one invoice. The rate is graduated: on Growth, the first five clients are €149 each, clients six to fifteen €119, sixteen to forty €99, and every client after that €79. Each band is charged at its own rate, so the average falls as the book grows rather than jumping at a threshold. The minimum is 5 clients, which puts the smallest Growth invoice at €745 a month.

Two things are deliberately missing: a percentage of ad spend, and a separate price for white label. Your client's login carries your brand on every tier, white-label reports come with Growth and Scale, and the white-label page lists exactly what is branded and what still names us.

What to ask any tool before you sign

• Does the price change when my clients spend more? If yes, by how much at Q4 budgets?
• Is the per-client price a band rate or the average I will actually pay?
• Is there a minimum, and what happens to my invoice if I lose a client?
• Can my client see the tool's prices, or its name, in what I give them?
• When a client leaves, can I export their full history?

If you run Amazon PPC for clients and want to see the full price table, Mirox for agencies has it, with no form in the way.