E-commerce profit calculator
Understand marketplace fees, product costs and your real profit margin.
Your numbersUSD · US assumptions
Adjust fee assumptions
US example: $0.20 listing + $0.25 processing, plus 6.5% transaction and 3% processing. Offsite ads and regional regulatory fees entered separately. View fee source ↗
YOUR ESTIMATED NET PROFITLive
$24.80
49.6% profit margin
You keep Fees & costs
Total customer payment$50.00
Listing fee−$0.20
Referral / transaction fee−$3.25
Payment processing−$1.75
Regulatory fee−$0.00
Ads / affiliate cost−$0.00
Product cost−$15.00
Shipping / fulfillment−$5.00
Net profit$24.80
Room to reinvest. Stress-test advertising and returns before scaling.
Break-even price$22.60
Return on cost124.0%
03 / LOOK PAST THE HEADLINESmall percentages.
Small percentages.
Real money.
Platform fees cost more than the headline percentage. A fixed 30¢ is 3% of a $10 payment, but just 0.03% of a $1,000 invoice. Your transaction size matters.
Marketplace fees often include shipping in the fee base. Collecting $5 for delivery doesn’t mean you have $5 left to pay the carrier.
How we calculateTHE REVERSE-INVOICE FORMULA
Gross invoice =
(Target net + fixed fees)
÷ (1 − percentage rate)
(Target net + fixed fees)
÷ (1 − percentage rate)
To keep $1,000 at 2.9% + $0.30, invoice $1,030.17. Simply adding 2.9% won’t cover the fee on the extra amount.
Minimum fees and cent rounding are handled by the calculator.