Amazon FBA Profit Calculator
Adjust the inputs below. Results update as you type.
How it works
FBA margin depends on more than list price. Start from your landed product cost, then subtract referral fees, FBA fulfillment fees, storage, returns allowances, and any PPC or coupon spend. Referral fees vary by category; fulfillment fees scale with size and weight tiers that Amazon updates periodically—verify current Seller Central fee schedules before locking a launch price. Compare break-even units against expected sell-through so ads do not erase contribution margin. Pair this page with ROI and sales-tax tools when you expand into more ASINs or marketplaces.
Input guidance
- Confirm date/time/unit settings before comparing outputs.
- If a task has optional fields, run both with and without them to understand impact.
- Save scenario variants when making practical decisions.
The formula
Profit per unit = selling price − (product cost + inbound shipping + referral fee + FBA fee + storage + ads + return-loss reserve). Referral fee = price × category percent; return reserve ≈ return rate × (cost + FBA fee).
Worked example
A $29.99 item with $6 cost, $1.50 inbound, 15% referral (~$4.50), $5.50 FBA, $0.40 storage, $2 ads, and a small return reserve might net about $9–10 per unit before scaling volume.
More examples to test
- Quick-pass example: run default assumptions for a first estimate.
- Refined example: update one assumption at a time to isolate impact.
How to interpret results
Use outputs as operational estimates and pair them with local constraints, business rules, or provider requirements.
When this can be inaccurate
Utilities can miss local policy details, special-case rules, and environment-specific constraints.
Change history
- June 2026: Quality-reviewed for publication with formula checks and explanatory copy updates.
Site-wide corrections also appear on the corrections log.
Find productivity tools for everyday workflows
General recommendation, not professional advice.
Frequently asked questions
Why model returns separately?+
Returns still cost you product and often fulfillment fees. A return-rate reserve keeps the unit economics honest before you scale ads.
Do FBA fees stay fixed?+
No. Fulfillment and storage fees change with size tier, weight, and Amazon’s schedule updates — verify Seller Central before you commit to a launch price.
What does ROI mean here?+
ROI compares profit per unit to cash tied up in product plus inbound shipping, showing how efficiently each unit of inventory capital returns.
Why are outputs slightly different from another tool?+
Different tools can use different rounding rules, default assumptions, and treatment of edge cases.
How can I improve estimate reliability?+
Use verified inputs from real records and re-run calculations after major assumption changes.