Fees verified 2026-04-28 Source-cited fees Open methodology →

Amazon FBA Profit Margin Calculator

Instantly calculate your Amazon FBA referral fees, fulfillment costs, storage fees, and net profit. Updated for Amazon's 2026 fee structure.

Quick-start scenarios

Revenue

Your Costs

Platform & advanced settings
Gross Revenue
$20.00
Total Fees
$3.00
Net Profit
$7.00
Margin
35.0%
Strong margin

Revenue Breakdown

Profit
35.0%
Fees
15.0%
COGS
25.0%
Shipping
15.0%
Ad Spend
10.0%

Fee Detail

Referral Fee$3.00
Total Fees$3.00

How Amazon FBA Fees Work

Amazon FBA sellers face one of the most complex fee structures in ecommerce. Between referral fees, FBA fulfillment costs, storage charges, and advertising spend, your true profit can be very different from what your sales dashboard shows.

Amazon's fee structure starts with a referral fee — typically 15% of the sale price — applied to every transaction. Then FBA adds fulfillment fees based on product size and weight, which can range from about $3 to over $10 per item. On top of that, inventory storage fees are charged monthly based on cubic footage, with rates nearly tripling during the Q4 holiday season.

Our Amazon FBA Profit Margin Calculator helps you untangle all these costs. Enter your selling price, cost of goods, FBA fulfillment fee, monthly storage estimate, and ad spend to get an instant profit breakdown. Use the pre-loaded scenarios to compare standard-size versus large items, and see exactly how each fee category impacts your bottom line.

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Frequently Asked Questions

What are Amazon's referral fees?+
Amazon charges a referral fee on each item sold, typically 15% of the total sale price (including shipping and gift wrap). The exact percentage varies by category — most categories range from 8% to 45%, with 15% being the most common for general merchandise. There is also a minimum referral fee of $0.30 per item.
How are FBA fulfillment fees calculated?+
FBA fulfillment fees are based on the product's size tier and shipping weight. Standard-size items start around $3.22 for small items under 4 oz, going up to approximately $6.85+ for large standard items over 3 lb. Oversize items incur significantly higher fees. This calculator lets you input your specific per-item fulfillment fee.
How much are Amazon FBA storage fees?+
Monthly storage fees range from $0.56 to $3.34 per cubic foot depending on the time of year and product size. From October through December, storage fees are significantly higher. Long-term storage fees apply to inventory stored for more than 365 days. Enter your estimated monthly storage cost in this calculator.

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Compare across platforms

Same product, different platforms — and very different take-home. See how this scenario stacks up on the other marketplaces, or read the side-by-side fee table.

Etsy → Shopify → Dropshipping → Side-by-side table