Federal Trade Commission, Consumer Advice · reviewed 2026-10-10
What this source supports: When reselling items online, price after fees, shipping, and condition, and compare your net to trade-in.
Source limit: Marketplace fees change; check the current fee schedule on the platform you use.
These sources support the statements above. They do not show that every person needs this guide. They do not show a specific result.
Limits
This guide subtracts the costs you enter. It does not read a platform's fee schedule or handle taxes.
Marketplace fees change; check the current fee schedule on the platform you use.
Use current instructions from the responsible organization. This guide is a planning aid, not an official decision or a substitute for qualified advice.
Common questions
What does the App compute?
Turn a sale price, fees, shipping, and supplies into net proceeds and the true cost share.
What does the App not do?
This App subtracts the costs you enter. It does not read a platform fee schedule, calculate tax, or confirm a payout date.
Where do the numbers come from?
You enter every number yourself. The sources support the method and the limits. They do not produce a result for your specific case. Keep the original documents next to the sheet you build.
Before you start
Open the linked source page and keep it beside you.
Gather the values the App asks for:
Sale price in dollars.
Platform fee in percent.
Shipping and packaging in dollars.
Item and preparation cost in dollars.
Set aside ten quiet minutes; rushed numbers are the main error this guide prevents.
Free Companion App
The App computes the worked example with your own numbers, in your browser.
APP 1
Online Sale Net Proceeds Check
Turn a sale price, fees, shipping, and supplies into net proceeds and the true cost share.
This guide is edited for clarity and checked against the sources it links. It is not a substitute for official instructions or qualified advice. A linked source does not show that every person needs this guide.