Enter one sale. Commission comes off the item price; payment processing is charged on the whole order, including the buyer's shipping and tax.
Use this to set a starting bid or a buy-it-now floor. The break-even price is where profit hits $0 after every fee.
Starting an auction below break-even means a $1 opening bid that ends there loses money. Use the floor as your minimum.
Before you buy a lot, work backward from what each item will sell for to the most you can pay and still hit your margin.
Assumes every item sells at the expected price. If you usually sell 80% of a lot, lower the item count to match.
Paste or upload a CSV with columns item, cost, price and optional category (general, electronics, coins) and shipping. Every row is checked against your target margin. Free shows the summary for the whole list and details for the first 10 items.
| Item | Cost | Price | Fees | Profit | Margin | Max cost | Verdict |
|---|
Three questions every Whatnot seller asks: what do I keep, what's the lowest price I can take, and how much can I pay for a lot. Large text, captions on, no sign-up.
Defaults are Whatnot's published US rates as reported in 2026: 8% commission on the item price (5% electronics, 4% coins and money) plus 2.9% + $0.30 payment processing on the full order. Check your Seller Hub statement and change any rate here if yours differs. Your changes are saved in this browser.
The three calculators stay free. Pro is for sellers who source in bulk and want to check a full supplier list before they pay for it.