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Amazon FBA profit calculator

See what each sale really earns after product cost, Amazon fees, other costs and advertising.

Net profit per unit-
Net margin-
ROI on product cost-
Monthly net profit-

How it is calculated

  • Amazon fees = price x referral % + FBA fee + storage
  • Net profit = price - product cost - freight - Amazon fees - other costs - ad spend
  • Margin = net profit / price x 100
  • ROI = net profit / (product cost + freight) x 100

Most sellers know their gross margin but not their net margin after advertising and returns. This calculator puts every cost on one line so you can see which lever moves profit most: price, product cost, fees or ad spend.

Fees here are entered by you, not estimated, because Amazon fees vary by category, size tier, price and season (including the 2026 holiday peak fulfillment fee). Pull exact numbers from Seller Central for each ASIN.

Questions about the amazon profit calculator

What is a good profit margin on Amazon?

There is no single number; it depends on category, price and growth goals. Many sellers aim to keep a healthy net margin after advertising, but the useful test is whether the product still makes money at your current ACoS.

How do I lower Amazon fees?

Check size tier and dimensions (a small packaging change can move tiers), keep inventory healthy to avoid storage surcharges, and review referral categories. Our FBA fees guide covers each fee.

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