Fees and net profit

Every profit number in Underpriced AI is after fees. Here is where those fees come from and how to adjust them.

The rates we apply

When you record a sale and pick a platform, the fee is calculated for you:

• eBay: 13.25 percent final value fee
• Poshmark: 20 percent commission
• Mercari: 10 percent selling fee
• Facebook Marketplace: 5 percent selling fee
• Other platforms: enter the fee manually

These are estimates used for planning. For items you listed to eBay through Underpriced AI, eBay auto-sync replaces the estimate with the real marketplace fees from the actual order, along with the sale price and shipping charges.

See take-home before you buy

Every scan result includes the "Should I Buy It?" calculator:

1. Scroll to the "Should I Buy It?" section on a scan result.
2. Enter what you would pay for the item.
3. Enter your estimated shipping cost.
4. Read the net profit and ROI for eBay, Poshmark and Mercari side by side.

That is a buy or pass decision you can make standing in the aisle. Each scan also shows estimated take-home after fees on each platform, which is useful when two marketplaces price an item similarly but charge very differently.

See net profit after the sale

On each item page you get a breakdown of costs, fees and net profit once you have recorded the purchase price and the sale. ROI is calculated as (Profit / Total Cost) x 100.

Things to remember

Fees are only part of the gap between price and profit. Outbound shipping, inbound shipping if the item was mailed to you, and your purchase price all come off the top, so record them.

A 20 percent commission changes which platform is worth the effort. Check the fee breakdown next to the sold comps before you choose where to list, especially on lower priced items where a flat shipping cost eats most of the margin.

On the Business plan, the Analytics dashboard rolls all of this up into revenue, profit and category performance reports.