Marketplace Fees Eat More Than You'd Think
The same product can leave you with very different margins depending on where you sell it. Amazon charges a referral fee that typically runs 8% to 15% depending on category, Etsy keeps its transaction fee at a flat 6.5% (plus payment processing), and eBay's final value fee lands around 13.25% on most categories. If you offer free shipping, that cost comes out of your pocket too, so subtracting only the item cost from the price gives you a distorted picture of what you actually keep. If you list on more than one marketplace, comparing net margin — not just list price — helps you decide where to focus.
How It's Calculated
| Step | Item | Detail |
|---|---|---|
| 1 | Subtract cost | Selling price minus item cost |
| 2 | Selling fee | Applies your selected marketplace's average rate |
| 3 | Shipping | Subtracts what you cover per order |
| 4 | Monthly profit | Net margin per order × monthly units sold |
This calculator does not account for category-specific fee tiers, advertising spend, returns, or sales tax. Check your seller dashboard for your exact category fee before making pricing decisions.
Frequently Asked Questions
Yes — Amazon runs roughly 8%-15% by category, Etsy is a flat 6.5% plus processing, and eBay is about 13.25%. This calculator uses representative averages.
Enter what you actually pay to ship each order if you offer free shipping, and it's subtracted from your margin along with the selling fee.
No. Sales tax, advertising spend, and returns aren't included, so your actual profit may differ from this estimate.
※ Actual fees vary by category and promotion. This is an estimate only.