How to Read Your Reseller Profit
This calculator tells you whether an item is actually worth flipping. Too many resellers price by "what feels right" and lose money to fees, shipping, and payment processing they forgot to account for. Here is the exact breakdown:
- Gross profit — Selling price minus your buy cost only. This is the number most sellers wrongly celebrate.
- Platform fees — The marketplace's cut (final value fee + per-order fee). eBay takes 13.25% + $0.30; Poshmark takes $2.95 under $15 or 20% at/above $15; Mercari takes 10% + payment fee; Depop takes 10%; Amazon FBA takes far more. This calculator auto-objects the rate and fixed fee when you pick a platform.
- Shipping — If you offer free shipping, this comes entirely out of your pocket.
- Other costs — Packaging, labels, tape, and sales tax on your gross.
Breakeven price is the lowest price you can sell for without losing money. Price below it and you are working for free (or paying to sell).
What is a Good ROI for Reselling?
Experienced flippers aim for a minimum 100% ROI on inventory they have to buy, and 30–50%+ on items they source. If your ROI is under 40%, the item is only worth it if it sells fast (low holding time) or you are clearing dead stock. Use the breakeven number as your negotiating floor with buyers.