How Much Do You Actually Keep After Platform Fees?
Selling online isn't as simple as price minus cost. Amazon and Shopify both take a cut before the money ever reaches your bank account, and once you add shipping, packaging, and payment processing on top, what's actually left can be a lot thinner than it looks on paper. Amazon's referral fee usually runs 8% to 15% of the item price depending on category, while Shopify charges a monthly plan plus roughly 2.9% + $0.30 per transaction through Shopify Payments. When you're competing on price or running a promotion, not knowing your true breakeven point can mean losing money on every sale without realizing it. This calculator takes your price, cost, fee rate, shipping, and other costs and instantly shows your real per-unit margin, margin rate, and the lowest price you can charge without losing money.
If you sell on both Amazon and Shopify, running the same product through this calculator with each platform's fee structure makes it easy to see which channel actually pays you more per sale, not just which one moves more units. Prices set during a flash sale or seasonal promotion are especially worth double-checking here before you commit, since a few seconds of math can prevent weeks of selling at a loss.
How It's Calculated
| Item | Formula |
|---|---|
| Platform Fee | Price ร Fee Rate |
| Real Margin | Price โ Fee โ (Cost + Shipping + Other Costs) |
| Breakeven Price | (Cost + Shipping + Other Costs) รท (1 โ Fee Rate) |
Frequently Asked Questions
Amazon charges a referral fee that typically runs 8% to 15% of the item price depending on category, plus extra fulfillment fees if you use FBA. Check your exact category rate in Seller Central before entering it here.
Shopify charges a monthly subscription plus a payment processing fee of about 2.9% + $0.30 per transaction with Shopify Payments. Enter the processing rate as your fee percentage and add the flat $0.30 under other costs.
It's the lowest price at which your cost, shipping, and fees are fully covered with zero profit left over. Selling below this price means you lose money on every unit, no matter how many you sell.
โป Actual fee rates and payout terms vary by platform policy. This is an estimate for reference only.