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 estimated for you, and you can type over it:

• eBay: follows the Country on your account. For US sellers, a 13.6 percent final value fee in most categories. UK and German private sellers pay no eBay selling fee on domestic sales, so none is added. UK business sellers get 12.9 percent in most categories plus the 0.35 percent regulatory fee and 30p or 40p per order, before VAT. Other countries, and business sellers outside the UK, use the US rate as an estimate. If you sell in the UK or Germany, set "I sell on eBay as" in Settings.
• Poshmark: 20 percent, or a flat $2.95 under $15 (US rate)
• Mercari: 10 percent (US rate)
• OfferUp 12.9 percent, Depop 3.3 percent plus $0.45, Etsy 6.5 percent plus payment processing (US rates), and an estimate for Whatnot
• Facebook Marketplace, local and other sales: no fee is added when you mark the item sold, so enter one if you paid it, for example Facebook's fee on a shipped order

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 each marketplace that operates in your country, side by side: eBay, Poshmark, Mercari, Facebook and Etsy for US sellers, or eBay, Vinted and Etsy in the UK and EU.

That is a buy or pass decision you can make standing in the aisle. Each scan also shows "You keep (after fees)", your take-home after the marketplace's selling fee, 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 recent sales before you choose where to list, especially on lower priced items where a flat shipping cost eats most of the margin.

On Pro Plus and above, the Analytics dashboard rolls all of this up into revenue, profit and category performance reports.