Profit Margin Calculator
Enter a sale price, marketplace, item cost, and shipping costs to calculate net profit, net payout, marketplace fees, and the profit margin left after the sale clears.
$21.80
after eBay fees and costs
43.6%
profit divided by buyer-paid revenue
$7.20
14.4% effective fee rate
$42.80
before item and shipping costs
Tie margin checks to current fee data
Margin calculations are only useful when the fee model is current. Use the Fee Index for same-input marketplace rows, Fee Changes for recent policy updates, and Seller Reports for dated summaries before comparing margins across selling channels.
After the source check, run the exact sale price, item cost, shipping, and platform inputs here to see whether the margin is durable enough to repeat.
Turn this result into a listing decision
Use the tool result as a starting point, then test payout, break-even price, shipping, and marketplace fit before you publish the listing.
How to use margin
Profit margin shows how much of the buyer-paid revenue remains after fees and direct costs. A high dollar profit with a weak margin can still be risky if the item takes storage space, return risk, or repeated markdowns.
Use margin before sourcing repeat inventory. If a listing only works with perfect pricing and perfect shipping, the buy cost probably needs to be lower.
Related tools
Check the break-even floor before accepting offers, then compare payout across marketplaces when the same item could sell in more than one place.