Fee sources & change log

Every number in our calculators comes from the platform’s own published fee page. Here is the list and when we last checked it.

PlatformOfficial sourceChecked
eBayhttps://www.ebay.com/help/selling/fees-credits-invoices/selling-fees?id=48222026-10-16
Etsyhttps://www.etsy.com/legal/fees/
https://www.etsy.com/sell
https://www.etsy.com/legal/etsy-payments/
https://help.etsy.com/hc/en-us/articles/360000338367-How-Etsy-s-Offsite-Ads-Work
https://help.etsy.com/hc/en-us/articles/1500011073202-What-is-a-Regulatory-Operating-Fee		2026-10-16
Poshmarkhttps://poshmark.com/posh_guide/get_started_on_poshmark
https://blog.poshmark.com/		2026-10-16
Mercarihttps://www.mercari.com/us/help_center/article/169/
https://www.mercari.com/us/help_center/article/2517/		2026-10-16

Change log

  • October 16, 2026: Launch. Verified eBay (13.6% most categories, 13.25% trading cards, $0.30/$0.40 per order), Etsy (6.5% / 3% + $0.25 / $0.20 / Offsite Ads 15% or 12%), Poshmark ($2.95 under $15, 20%), Mercari (10% selling fee).

Spotted a fee change? Tell us and we’ll update within 48 hours. The raw data is in fees.json.