Two lines: the management fee and everything Amazon and your suppliers charge. Our fee runs $800 a month for one product to $2,400 for five, all services included. Ad spend, storage, referral fees, and inventory sit on top, and those are the lines that actually move. Build it in that order.
The short version
- The fee is fixed and knowable. Everything else scales with units, and units are what you are actually managing.
- Tiers follow products. $800 one product, $1,150 two, $1,500 three, $1,950 four, $2,400 five, scoped on a call at six or more.
- Month one is two months of fee. The first invoice covers your first and last month upfront.
- Your own time is a cost line. Around two hours a month after onboarding, four to six hours a week during a launch.
- Build a stop rule at the same time as the budget, because the most expensive monthly cost is a product you keep funding after it has answered you.
Build the number in five steps
- Count the products you actually intend to fund. Not the ASINs you own, the ones you will put budget and attention behind. Do not price the tier until this list is final.
- Take the tier fee for that count. This is the only line you can predict twelve months out. Add a second month of it to your month one cash plan.
- Add Amazon's per-unit fees at your current run rate. Referral, fulfillment and storage, pulled from your own reports. Do not proceed on estimates when the real numbers are one export away.
- Add ad spend. No hard minimum applies, though below about $1,000 a month there is not enough data to optimize meaningfully. Decide this figure per product, not per account.
- Amortise inventory replenishment across the months it covers. A single purchase order landing in one month distorts every ratio you are about to calculate.
Only now compare the total against gross profit. Comparing the fee alone against revenue is how sellers convince themselves a losing product is fine.
The full monthly picture
| Line | Who charges it | How it behaves |
|---|---|---|
| Management fee | Your agency | Fixed, tiered by product count |
| Referral and fulfillment fees | Amazon | Per unit, rises with volume |
| Storage | Amazon | Rises sharply in peak months |
| Advertising | Amazon | Whatever you set, and the easiest line to lose control of |
| Inventory and freight | Your supplier and freight forwarder | Lumpy, long cash cycle |
| Creative and sourcing | Inside our fee, brokered at some agencies | Check which before comparing quotes |
| Your own hours | You | About two a month once running, four to six a week during a launch |
Decide now when to stop paying it
The highest monthly cost in this business is not a fee. It is the product you keep funding after the market has already told you the answer.
I have paid for that lesson. Early on I poured money into a failing product for three months, convinced that the next round of advertising would turn it around. It did not. The money was gone, and worse, the three months were gone. Every kill criterion we use now came out of that period.
Set them before you need them. Rating trend, return rate, conversion rate and customer acquisition cost trajectory, each measured over a defined window agreed in advance. When the window closes, you scale, fix or kill, and the decision is made against numbers you wrote down while you were calm rather than while you were invested.
Ask any agency you are considering what would make them tell you to stop. An agency paid monthly has an obvious incentive not to have an answer. Ours is written into how we run accounts, and it is the single most useful thing you can put in a management agreement.
What most agencies will not tell you about monthly costs
The fee is the smallest controllable number in your monthly stack and it absorbs most of the negotiation energy. Meanwhile the advertising line, which is usually several times larger and entirely discretionary, gets approved without the same scrutiny. If you want to reduce monthly cost, that is where the money is.
The second omission is subtler. Monthly cost is usually quoted per account when it should be understood per product. A $2,400 tier across five products where two are dead is not a $2,400 problem, it is a portfolio problem, and no fee negotiation will fix it. Cut the dead products, drop a tier, and the monthly number solves itself.
Related answers
- How to estimate Amazon brand management budget
- Retainer tiers for sellers under $1m revenue
- Amazon seller brand management fees explained
- Amazon agency vs in-house team pros and cons
- Amazon agency pricing and economics: the complete guide
Every tier and everything included in it is published at Flapen.
