Amazon FBA Profit Margin Example for a New SKU

A new Amazon SKU should be tested with a conservative unit model before inventory is ordered. Start with the expected selling price, product cost, inbound shipping, referral fee, FBA fulfillment fee, and a small allowance for storage or other per-unit costs.

Then add ad spend and expected return loss. Many sellers skip these lines during product research, which makes the opportunity look stronger than it really is.

If a product sells for $29.99, has $8.00 product cost, $1.20 inbound shipping, $4.50 referral fee, $5.20 FBA fee, and $3.00 ad cost, the estimated profit is $8.09 before extra overhead.

That is about 27% net margin. If return loss adds $1.50 per order, margin drops to about 22%. Small cost assumptions matter.

Test the model at lower selling prices, higher ad costs, and higher return rates. If profit disappears with only a small change, the product needs a better supplier cost, stronger pricing power, or a different launch plan.

Use the calculator to compare best-case, expected-case, and downside-case scenarios before committing cash.