How to calculate Amazon FBA profit
Profitability on Amazon comes down to one equation. Your net profit per unit is your selling price minus four things: the cost of the product itself, Amazon's referral fee, the FBA fulfillment fee, and your other per-unit costs (inbound shipping, storage, returns and advertising). This calculator runs that equation for you and also returns the two ratios sellers actually use to make decisions — profit margin and return on investment (ROI).
The formula
Net profit = Selling price − Product cost − Referral fee − FBA fulfillment fee − Other costs. From there, profit margin = net profit ÷ selling price, and ROI = net profit ÷ product cost. Experienced FBA sellers typically look for a margin above 15–20% and an ROI above 50–100% before committing to a product, because that cushion absorbs PPC, returns and fee changes.
How to use this calculator
- Enter your selling price and the landed product cost (manufacturing plus freight to your door or to Amazon).
- Pick your category so the correct referral fee percentage is applied.
- Choose the size tier and weight — the tool estimates the FBA fulfillment fee, which you can override with the exact figure from Amazon's calculator.
- Add inbound shipping and other per-unit costs, then read your profit, margin and ROI on the right.
Amazon FBA fees explained (2026)
Referral fee
Amazon charges a referral fee on every sale — essentially a commission for selling on the marketplace. Referral percentages were frozen for both 2025 and 2026. Most categories are 15%, consumer electronics and computers are 8%, and a few specialty categories run higher (Amazon device accessories reach 45%). There is also a per-item minimum referral fee of about $0.30.
FBA fulfillment fee
This is what Amazon charges to pick, pack and ship each unit. It is driven by the product's size tier and shipping weight. As a rough guide for standard-size items in 2026:
| Example product | Tier | Approx. fulfillment fee |
|---|---|---|
| Up to 4 oz | Small standard | ~$2.50 |
| ~15 oz | Small standard | ~$3.21 |
| 1.5 lb | Large standard | ~$5.13 |
| 2 lb | Large standard | ~$5.37 |
| 3 lb | Large standard | ~$6.04 |
Effective January 15, 2026 Amazon revised fulfillment fees using a three-band pricing structure (under $10, $10–$50, over $50). Items priced $10–$50 rose about $0.08/unit on average and items over $50 about $0.31/unit. Always confirm the exact fee for your ASIN in Amazon's official Revenue Calculator before sourcing.
Costs this tool folds into "other"
Monthly storage fees, long-term storage surcharges, FBA prep, returns processing and your advertising (PPC) spend per unit all eat into real profit. New sellers routinely forget these and overestimate margin. Put a realistic per-unit figure in the "other costs" field — even $0.50–$1.00 changes the picture.
What is a good FBA profit margin?
As a working rule, a margin below 10% is risky once advertising and returns are included, 15–25% is a healthy target for private label, and above 25% is strong. ROI matters just as much because it tells you how hard your cash is working: many sellers won't source a product under ~50% ROI because slow-moving inventory and ad costs erode it quickly.
Frequently asked questions
Is this the same as Amazon's own FBA calculator?
This is an independent estimator built to be fast and to teach the math. For the exact fulfillment fee on a specific ASIN, cross-check with Amazon's official Revenue Calculator in Seller Central — then paste that number into the FBA fee field here to get an exact profit figure.
What referral fee should I use?
Most categories are 15%. Use 8% for consumer electronics and computers. The dropdown covers the common cases, and you can enter a custom percentage for anything else. Remember the ~$0.30 per-item minimum on low-priced goods.
Does this include monthly storage and PPC?
Not automatically — those vary hugely by product and season. Add them as a per-unit figure in the "other costs" field so your margin reflects true, all-in profitability.
How accurate is the fulfillment fee estimate?
It approximates Amazon's standard-size tiers from your weight input and is good for quick screening. For oversize/bulky items, look up the fee and enter it manually. Fees change at least annually, so verify before committing inventory.
How do I improve a thin margin?
Levers include lowering landed cost (negotiate/MOQ/freight), reducing weight or dimensions to drop a size tier, raising price if the listing supports it, and cutting ad waste. Dropping from large to small standard size alone can save $2+ per unit.
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Disclaimer: estimates only, for planning purposes. Amazon fees change and vary by product, season and program. Verify current fees in Amazon Seller Central before making sourcing decisions. Some links on this page are affiliate links.