Amazon FBA Profit Calculator
Enter your price and costs to see your true net profit, margin, and ROI per unit after Amazon's referral and FBA fees. No sign-up.
Defaults reflect a typical private-label item (Large Standard, 12 to 16 oz). Override any field with your own numbers. Amazon referral percentages verified June 2026.
How the Amazon FBA profit calculator works
Your real profit on Amazon is what is left after three layers of cost: your product, the Amazon fees, and the bits sellers forget. We net them all out per unit.
The formula
Amazon referral fee is your price times the category percentage, with a $0.30 minimum. We add the FBA fulfillment fee and per-unit storage to get total Amazon fees. Then: Net profit = price minus COGS minus inbound shipping minus Amazon fees minus misc. Margin is net divided by price. ROI is net divided by the cash you tie up per unit (product plus inbound).
What a good result looks like
For private label, a net margin of 20% or more and an ROI of 50% or more is a typical green light. Below that, your pricing, sourcing, or fees usually need work before you scale ad spend. Once you know your margin, run it through the break-even ACOS calculator to see how much you can spend on ads.
Frequently asked questions
How are Amazon FBA fees calculated?
Two main fees: a referral fee (a category percentage of the sale price, usually 15%, with a $0.30 minimum) and an FBA fulfillment fee based on the item's size and weight. Long-term and monthly storage are billed separately per cubic foot, which this tool amortizes per unit.
What is a good profit margin on Amazon FBA?
For private-label products, a net margin of 20% to 30% after all fees is considered healthy. Thin-margin items can still work at high volume, but they leave little room for ad spend and returns.
What is the difference between margin and ROI?
Margin is profit as a percentage of the sale price. ROI is profit as a percentage of the cash you invest per unit (product plus inbound shipping). A product can have a modest margin but a strong ROI if your unit cost is low.
Does this include PPC ad costs?
Not directly. This shows profit before advertising so you know your true unit economics. Use the break-even ACOS calculator to layer in how much ad spend your margin can support.
Want us to fix what the numbers reveal?
Book a free 30-minute audit. We pull your account live, find your three biggest leaks, and hand you a 90-day plan to keep.
Get my free auditThis calculator is for planning and estimates only. Amazon referral and FBA fees change at least annually (figures verified June 2026); confirm your exact fees in Seller Central before making decisions.