Margin & Mailers

Research and tools for resellers

Reseller profit calculator: Whatnot & eBay

See what you keep after platform fees, payment processing, shipping and costs. All math runs in your browser; nothing is sent anywhere.

Your sale

Supplies, promo, gas, etc.

Some fees are charged on tax too.

Fee rates Verify current rates · defaults as of 2026-10-28

US standard 8%. Lower volume tiers (down to 3%) and some categories differ. Shipping and tax are excluded.

On item + shipping + tax.

Official: Whatnot seller fees

Results

Buyer pays (item + shipping + tax)–
Platform fees–
Payment processing–
Net payout (includes shipping the buyer paid)–
Your costs (item + label + other)–
Profit–
Margin (profit ÷ sale price + shipping charged)–

Net payout = item price + shipping charged to the buyer − platform fees − processing. It can be higher than the item price when the buyer pays shipping; your label cost is subtracted in Profit. Sales tax is passed to the state and is not counted as income.