About SaleMargin Lab
Compare US eBay and Etsy fee scenarios, find a target price and review a batch of items. Your numbers stay in your browser.
A method you can inspect
Buyer sales tax is included when calculating the relevant payment or final-value fee base, but excluded from your revenue. The tax percentage is your scenario input, not a location-based tax determination. Postage charged to the buyer is revenue; postage you pay is a separate cost. The result is contribution profit before unallocated overhead and income tax.
The individual site operator is based in Ontario, Canada. This site provides practical browser tools and original worked examples. It is not affiliated with the reference organizations linked in the guides, and does not claim professional certification.
Useful first, lightweight by design
There is no account to create. Tool calculations run on your device, and your entries are not uploaded to a calculation service. The pages use locally hosted fonts and simple diagrams. Printable outputs leave out navigation and advertising.
What to check
US domestic USD estimates. Fees checked 6 October 2026. Not affiliated with eBay or Etsy; actual charges and demand can differ.
Corrections and feedback
Each tool explains its assumptions alongside the result. If something does not match a worked example, use the contact form with the page name and a non-sensitive description of the problem. Check important dimensions and quantities independently before using them.
How the site is supported
Advertising may help support these free tools when enabled. Ad placements are labelled and separated from tool controls. Advertisements are not endorsements and do not appear on the printable output. Optional analytics, when enabled, measures visits only after your choice; it does not include your tool entries.