The short answer: published 2026 pricing guides put flat monthly retainers for Amazon agencies anywhere from about $1,500 for basic management to $25,000 or more for enterprise teams, and percentage-of-ad-spend fees at roughly 10 to 20% of monthly spend. Where your brand lands depends less on revenue than on catalog size, ad spend, the scope you hand over, and the contract terms around the fee.
We run an Amazon agency and sell our own products on Amazon, so we've been on both sides of these proposals. This guide explains how the models work and, more usefully, what each one quietly rewards.
The four common pricing models
Almost every Amazon agency quote is built from one of these, or a mix:
| Model | How it's calculated | Published 2026 range | What it rewards |
|---|---|---|---|
| Flat retainer | Fixed monthly fee for a defined scope | About $1,500 to $15,000 a month for most brands; $15,000 to $25,000+ for enterprise | Efficiency. Also, sometimes, doing the minimum. |
| Percent of ad spend | A share of what you spend on Amazon Ads each month | About 10 to 20% of spend, often with a monthly minimum | More spend, whether or not it's profitable |
| Percent of revenue | A share of total Amazon sales | About 3 to 10% of revenue | Top-line growth, whatever it costs in margin |
| Hybrid | A base retainer plus a percentage or performance bonus | Varies widely | Depends entirely on how the variable part is defined |
Ranges are from agency-published pricing guides by SupplyKick and GrowithAmazon (see sources). They're agency self-reports, not audited market data, so treat them as a starting point.
What each model rewards
The rate matters less than the behavior it encourages. Every fee structure answers a quiet question: what does the agency earn more for doing?
Percent of ad spend
This is the most common model for PPC-focused agencies, and it scales naturally with the amount of work. Its weakness is obvious once you say it out loud: the agency earns more when you spend more, even when the extra spend doesn't earn its keep. Plenty of agencies on this model manage responsibly. You just want the contract and the reporting to make profitability visible, so nobody has to rely on good intentions.
Percent of revenue
Revenue share sounds aligned, since the agency only does well when you do. But revenue isn't profit. An agency paid on sales can push growth through discounting or heavy advertising and look like a hero on a dashboard while your margin shrinks. If you go this route, ask how they'll protect margin and make TACoS part of the scorecard.
Flat retainer
A fixed fee removes the incentive to inflate spend and makes budgeting simple. The risk runs the other way: with no variable upside, some agencies settle into doing exactly what the scope requires and nothing more. A detailed written scope protects you here.
Hybrid
A base plus a variable component can balance the two, if the variable part is tied to something you actually care about. A bonus for hitting a profit or TACoS target is a very different deal from a percentage of all sales above a threshold.
How a sliding scale changes the math
Percent-of-spend fees can be structured as a flat rate or as a sliding scale where the rate drops as spend rises. Here's the difference using made-up rates, purely to show the shape:
| Monthly ad spend | Flat 15% | Sliding: 15% to $50K, 10% above |
|---|---|---|
| $20,000 | $3,000 | $3,000 |
| $50,000 | $7,500 | $7,500 |
| $100,000 | $15,000 | $12,500 |
| $200,000 | $30,000 | $22,500 |
Illustrative rates only. They are not our rate card or anyone else's.
At low spend the two are identical. As a profitable account scales, the sliding version stops charging you full rate on every new dollar. That's why our own PPC fee works this way: our fee shouldn't punish you for scaling an account that's working.
A sanity check: fees as a share of revenue
However the fee is structured, add it all up and divide by your monthly Amazon revenue. SupplyKick's 2026 guide suggests total agency fees usually land around 2 to 5% of revenue, and argues that anything above 5% is hard to justify for most brands. That's a useful gut check, though a brand in launch mode will run higher because the revenue isn't there yet.
Costs that don't show up in the headline rate
Two quotes with the same monthly fee can be thousands apart once you add the extras. The ones to ask about:
- Setup or onboarding fees. Published ranges run roughly $1,000 to $5,000, sometimes waived for a 12-month commitment.
- Creative. Photography, A+ Content, Brand Store pages and video are often billed separately. Ask exactly how many pieces a month are included.
- Minimum ad spend. Many PPC-focused agencies require $5,000 to $20,000 a month in spend before they'll take an account.
- Tool costs. Some agencies pass through software subscriptions. Others absorb them.
- Extra marketplaces. Each additional marketplace commonly adds a meaningful percentage to the base retainer.
The contract terms that matter more than the rate
A slightly higher fee with fair terms is usually a better deal than a cheap fee you can't get out of. Before you sign, check:
- Term length and exit. Six- and twelve-month terms are common, and published guides describe early-exit penalties of one to three months of retainer. Ours is a three-month commitment.
- Auto-renewal notice. Some contracts renew automatically unless you cancel 60 to 90 days ahead. Put the date in your calendar the day you sign.
- Who does the work. The fee buys a team. Ask who exactly, and whether the people in the sales meeting will be on your account.
- What's in writing. A list of deliverables and quantities, not "full-service management."
We cover the rest of what to ask in how to evaluate an Amazon agency before signing a contract.
How to compare quotes side by side
- Price each quote at your current spend and at the spend you're aiming for in 12 months. Percent-of-spend models diverge sharply as you scale.
- Add every extra. Setup, creative, tools and any marketplaces you sell on.
- Line up the scope. Count deliverables: A+ pieces, store pages, new listings, reporting frequency, meetings.
- Read the exit terms. Notice period, penalties, auto-renewal.
- Ask what they're measured on. If nobody mentions margin or TACoS, the fee model will decide the strategy for you.
How we price, for transparency
West M Products charges a monthly retainer tiered by catalog size, with the full scope of services included at every tier, plus PPC management as a percentage of ad spend on a sliding scale. We set final pricing after a discovery call and an account review, because we want to see your catalog, spend and account first. Engagements are a three-month commitment. See what every tier includes.
Sources
- SupplyKick, Amazon Agency Pricing: What Agencies Charge in 2026 (updated September 2026).
- GrowithAmazon, Flat Fee vs. Percentage of Ad Spend: How Amazon PPC Agencies Price Their Services in 2026.