Free Tool

Marketplace Profit Calculator

Sale price minus cost of goods still isn't your profit — fees eat the rest. See what you actually keep after Amazon, Etsy, eBay, or Shopify take their cut.

Marketplace

Sale price ($)

Cost of goods ($)

FBA fulfillment + storage fee ($)Look up your exact size tier in Seller Central's FBA Revenue Calculator.

Ad spend / misc per unit ($)

Marketplace / referral fee (%)

Units sold

Payment processing (%)

Payment processing, fixed ($)

Listing / closing fee, per order ($)

Fee rates prefill with typical Amazon (FBA) defaults — edit any field to match your own category and account. Rates change; always confirm current fees with the marketplace before pricing decisions.

RESULT — PER UNITLIVE

Net Profit

$8.04

Margin

32.2%

Total Fees

$10.45

ROI on COGS

124%

Referral / marketplace fee$3.75

Payment processing$0.00

Listing / closing fee$0.00

Fulfillment / shipping$5.20

Ad spend / misc$1.50

Break-even price$15.53

Total profit (1 units)$8.04

Why This Matters

The fees that quietly eat your margin.

Every marketplace charges some mix of a referral/final-value fee, payment processing, and a per-order or fulfillment cost. Stack them together and a product that looks profitable on paper can be a loser at checkout.

Referral / final value fee

A percentage of the sale price the marketplace keeps for the sale itself — around 15% on Amazon, 6.5% on Etsy, 13.25% on eBay, depending on category.

Payment processing

A smaller percentage plus a flat fee for moving the money — built into the platform fee on Amazon and eBay, billed separately on Etsy and Shopify/Stripe.

Fulfillment & fixed costs

What it costs to pack and ship the order — an FBA fee, your own postage, or a flat listing/closing fee — plus any ad spend you attribute to the sale.

Want this tracked automatically?

This calculator checks one sale at a time. The FBA Margin & Fee Tracker (in development) watches every SKU in your account and flags margin erosion before it costs you real money.