Amazon FBA Profit Calculator
The number that decides an FBA product's fate is profit per unit after every fee. Enter your sale price, referral rate, FBA fulfillment fee and landed costs — you get total platform fees, per-unit profit, margin and ROI on your product cost immediately. Every rate is editable, so when Amazon changes fees you can re-run the math in seconds.
How FBA profit is calculated
Referral fee is a percentage of the sale price (most categories 8–15%). FBA fulfillment fee depends on size tier and weight — check the current fee schedule in Seller Central and paste your number here.
Inbound cost is what you pay to get one unit into an Amazon warehouse (freight ÷ units per shipment). 'Other costs' is where per-unit PPC ad spend, packaging and prep belong.
ROI is calculated on product cost only (a common seller shortcut). A margin below 15% or ROI below 50% leaves very little room for PPC and returns at scale.
Frequently asked questions
What is a good profit margin for FBA?
Most experienced sellers want 20–30% net margin after all fees and PPC. Below 15% the business is fragile; above 40% usually invites competition.
Does this include monthly storage fees?
Storage is charged by cubic foot per month and is hard to split per unit — add an estimate to 'Other costs' (roughly $0.05–0.15 per small unit per month).
Where do I find my exact FBA fee?
Seller Central → Revenue Calculator, or the FBA features page for your marketplace. The default here ($5.50) is a typical small-standard size tier; apparel and oversize cost more.
Related tools
- Fee structure: Amazon Seller Central fee schedule (US, 2026). Rates editable — defaults are category-typical, not official for every product.
Last updated: 2026-09-08