Amazon True Profit: The Fees Most Sellers Forget to Count

Ask a seller how a product is doing and you will usually hear a revenue number. Revenue is the easy part. What you keep after Amazon takes its cut is the number that decides whether the product is worth selling, and it is almost always lower than people think.

The fees that quietly eat your margin

Each fee on its own looks small. Stacked together on a thin-margin product, they decide whether you make money.

• Referral fee: a percentage of every sale, set by category.
• FBA fulfillment: per-unit pick, pack and ship.
• Storage: monthly, and painful for slow movers and oversized items.
• Returns and refunds: the lost item, the refunded fee, and the processing cost.
• Advertising: ad spend that should be attributed back to the SKU it sold.

Why per-SKU beats a blended number

A blended margin across your whole catalog hides your problems. The winners subsidize the losers, and the average looks fine while specific products quietly bleed. The real decisions (what to promote, what to reprice, what to drop) happen at the SKU level, so that is where the profit number has to live.

How to calculate true profit per SKU

• Start with net revenue per unit after the referral fee.
• Subtract FBA fulfillment and a fair share of monthly storage.
• Subtract the real cost of returns and refunds for that SKU.
• Subtract product cost and inbound shipping.
• Attribute ad spend back to the SKU it drove.

You cannot fix a margin you cannot see. Count every fee, do it per SKU, and the products worth your attention sort themselves out.