Free tool

What do you actually keep per sale?

The sticker price isn't the profit. See your real net margin after marketplace fees, cost, shipping, and ads — on Amazon, eBay, Shopify, or Etsy.

Net profit / sale

$10.50

Net margin

35.0%
Sale price$30.00
Amazon fees−$4.50
Item cost−$10.00
Shipping you pay−$5.00
Ad spend / sale−$0.00

Fee basis: 15% referral fee (typical; 8–15% by category, FBA/fulfillment fees not included).

This uses standard published rates — your exact fees vary by category, plan, and fulfillment method. Kesper computes the real figure from your actual orders: net margin per SKU after every platform's fees, ad spend, and returns, updated daily. Every number cited to its source; nothing invented.

Know your real margin on every SKU.

Kesper's NEXUS and SCROOGE track net margin per product across every channel you sell on — so you stop selling the ones that quietly lose money. $49/month flat, 7-day free trial, no card.

Start your 7-day trialHow Kesper does it