What the fulfillment fee covers
One per-unit fee bundles everything Amazon does to get the order to the customer: picking it from the shelf, packing it, shipping it, handling customer service, and processing any return. Because it is flat per unit, it hits low-priced products hardest — a $3.42 fee is 23% of a $15 item but only 7% of a $50 one.
Free calculatorAmazon FBA profit calculatorApplies the right fulfillment fee for your size tier alongside referral and storage fees.Size tiers and the fee table
Amazon sorts every product into a size tier based on its packaged dimensions and weight, then charges a fee for that tier. The tiers run from small standard up through large standard to several oversize bands.
| Size tier | Approx. fee per unit |
|---|---|
| Small standard (≤ 4 oz) | $3.42 |
| Small standard (4–8 oz) | $3.54 |
| Small standard (8–12 oz) | $3.78 |
| Large standard | $4–$7+ (by weight) |
| Oversize | $9–$50+ (by size/weight) |
Tip
The jump between tiers is a step, not a slope. Shaving a fraction of an inch or an ounce off your packaging to cross into a smaller tier can cut the fee on every unit you ever ship.
The saving adds up fast. Dropping from large standard (~$5) to small standard (~$3.42) trims about $1.60 a unit — roughly $1,600 across 1,000 units sold, straight to your margin.
Price bands: cheaper items pay a little less
Since 2024, Amazon also nudges the fulfillment fee by price band. A small-standard item priced under $10 pays slightly less (around $2.49) than the same item priced $10–$50 (around $3.42). It is a modest difference, but it matters for low-ticket, high-volume products where every cent of margin counts.