Reseller Profit Calculator
Know your exact profit before you buy. Accurate fee calculations for eBay, Mercari, Poshmark & Facebook Marketplace.
What you paid (or will pay) for the item
What you plan to list it for
Your cost to ship (buyer-paid shipping? Enter 0)
Your Estimated Profit
Enter your numbers and hit calculate to see your profit breakdown.
eBay Fee Structure
13.25% final value fee on total sale price
$0.30 per-order payment processing fee
Fees may vary by category. Most categories are 13.25%.
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Join A Co — It's Free to StartHow to Calculate Reselling Profit
Knowing your exact profit before you buy an item is the #1 rule of successful reselling. Platform fees can eat into your margins fast — eBay charges 13.25% on most categories, Poshmark takes 20% on sales over $15, and even Facebook Marketplace now charges 5%.
This free calculator does the math for you. Enter the price you'll pay for an item, what you expect to sell it for, your shipping costs, and the platform — and get an instant breakdown of your net profit, ROI percentage, and profit margin.
Pro tip: aim for at least 50% ROI after all fees to account for returns, unsold inventory, and your time. The best flippers use tools like A Co to find deals where the math already works.