Profit Margin Calculator for Sellers
Free profit margin calculator for marketplace sellers: selling price, product cost, marketplace fee %, fixed fees, shipping, ads, discounts, return rate and monthly volume → net profit per order, margin, ROI, break-even price, the price for a target margin, and monthly profit.
Results
How it is calculated
Net profit = discounted price − percentage fees − fixed fees − product cost − shipping − ads. Fees and ads are applied to the discounted price, which is what the marketplace charges on. Margin = net profit ÷ discounted price; ROI = net profit ÷ (product cost + shipping).
Break-even price = (fixed fees + product cost + shipping) ÷ (1 − fee% − ad%). Target price = the same with the target margin added to the percentages, rounded up to the cent; with a discount it is grossed up to the list price. Expected profit = (1 − return rate) × net profit − return rate × loss per return, where the loss per return is what a returned order costs you beyond the lost sale (shipping both ways, non-refunded fees, unsellable stock) — the [return rate calculator](/en/return-rate-calculator) builds that number.
Key points
- Net profit per order = price − discount − percentage fees − fixed fees − product cost − shipping − ads. Margin is net profit ÷ price.
- Because fees and ads are percentages of the price, the price for a target margin is fixed costs ÷ (1 − fee% − ad% − margin%), not cost × a multiplier.
- Presets load typical fee structures: Amazon 15% (+ FBA fee as a fixed amount), Etsy 9.5% + $0.45, eBay 13.6% + $0.40, Shopify 2.9% + $0.30.
- Returns turn a per-order profit into an expected profit: at a 5% return rate losing $10 per return, an $8.78 profit becomes $7.84.
- The monthly view multiplies by volume and shows how much of revenue goes to fees, ads and returns.
Worked example
Amazon preset (15% + $3.91 FBA), product cost $9, shipping/inbound $0.80, 10% ads, 5% returns losing $10 each, 300 orders/month.
| Price | Net profit | Margin | Expected (after returns) | Monthly profit |
|---|---|---|---|---|
| $24.99 | $5.03 | 20.1% | $4.28 | $1,283.55 |
| $29.99 | $8.78 | 29.3% | $7.84 | $2,352.30 |
| $34.99 | $12.53 | 35.8% | $11.40 | $3,421.05 |
| $39.99 | $16.28 | 40.7% | $14.97 | $4,489.80 |
The table uses default assumptions. Enter your own numbers in the calculator above.
Rates as of2026-09-20Last automated check2026-10-01Marketplace fee pages and related news are checked automatically every day; changes are reflected here.
Wrong result or a rate that changed? Report a bug in this tool · Report a rate change
Results are estimates for reference only. Actual fees depend on each marketplace's current policies, promotions, your account status and product attributes. Verify in your seller account before making decisions.
Frequently asked questions
What is a good profit margin for an online seller?
After fees and shipping but before advertising, 25–35% is a common target for marketplace products; after advertising and returns 10–20% is typical. Below 10% one fee change or a price cut can erase the profit. The right number depends on volume and capital: a 12% margin at 1,000 units a month beats 30% at 20.
Margin or markup?
Margin is profit ÷ selling price; markup is profit ÷ cost. A 25% margin equals a 33% markup on total cost. This calculator reports margin, which is what marketplaces, lenders and fee tables use.
How is the target price calculated?
It solves price × (1 − fee% − ad% − target margin%) = fixed costs, then rounds up to the cent. If you apply a discount, the target is shown as the list price needed so that the discounted price still hits the margin.
Why enter the FBA fee as a fixed amount?
Amazon's fulfillment fee depends on size and weight, not price (within a price band), so it behaves like a fixed cost. Get the exact figure from the Amazon FBA calculator and paste it here, or use the preset's typical value.
Related tools
Free Amazon FBA profit calculator with the 2026 US fee tables: referral fee by category, FBA fulfillment fee by size tier and weight, monthly storage, the 3.5% surcharge, PPC and inbound cost. See net profit, margin, ROI and break-even price — no login, no ASIN required.Break-even ACoS & ROAS Calculator
Free break-even ACoS calculator for Amazon PPC and other marketplace ads: enter price, cost and fees to get break-even ACoS and ROAS, a target ACoS for the margin you want to keep, the maximum cost per click from your conversion rate, and TACoS.Return Rate Profit Calculator
Free calculator for the true cost of returns: return rate, return postage, resellable share, fees the platform keeps on a refund and ads already spent → expected profit per order after returns, break-even return rate, and the price that absorbs your return rate.