Seller Fee & Profit Calculator — Pro | 14 marketplaces, offline HTML file

What's inside

14 channels: Etsy, eBay, Amazon, Shopify, Poshmark, Depop, Mercari, Whatnot, TikTok Shop, Facebook Marketplace, Gumroad, Whop, Stripe and custom.
Single item: gross, total fees, effective fee rate, your costs, profit, margin, return on cost.
Break-even price — the lowest price that is not a loss.
Target-margin price — what to charge to keep the share you want.
Comparison table across every channel, sorted by what you keep.
Batch mode: paste lines of inventory and price it all at once.
Editable fee table that remembers your real rates.
CSV export and print-to-PDF.

Get it

$9 one time · no subscription

You get the HTML file itself, immediately after paying. Save it, open it in any browser, use it on your own devices for as long as you like.

Buy on Gumroad — $9 Buy with card — $9 Buy on Whop — $9 + local tax

Three checkouts, all $9 for the same file. Gumroad and Whop show any sales tax your location requires before you pay; the card checkout charges $9. Instant download on all three. If something does not work, reply to your receipt email and I will fix it.

Why this exists

Fees stack. A transaction percentage here, a payment-processing percentage there, a per-order cent charge, a listing fee, a monthly plan. On a $12 item the fixed fees can swallow the whole margin, and you only find out at payout. This tool adds every layer up before you list, shows the effective fee rate you are really paying, and then solves the formula backwards so you know the price you actually need.

An honest example

Comparison table from the calculator: a $40 item with $5 shipping, $12 cost, $4 postage and $1 packaging leaves $25.09 on Shopify, $23.27 on Etsy, $21.74 on eBay, $21.25 on Amazon and $19.00 on Poshmark, against break-even prices of $14.16 to $16.25. — Example output for a $40 sale price, $5 shipping charged to the buyer, $12 item cost, $4 postage and $1 packaging. Shopify counts its $39 plan over 30 monthly orders. Fee defaults are typical US planning figures; every rate is editable to match your own payout report.

Same item, same price — about a $6 spread between the best and worst of those five channels. That spread is the whole reason to check before you list, not after the payout lands.

Honest limits

Fee defaults are typical US starting points, not promises. Platforms change them and vary them by category, country and seller level. The table is editable for that reason; confirm with your platform.
It is a planning tool, not tax or accounting advice. Income tax, VAT/GST, returns, ad spend and currency conversion are only included if you enter them as costs or as an extra percentage.
It does not predict sales or earnings. It tells you the arithmetic of a price, nothing more.
Single-purchaser licence: use it yourself and in your own business. Please do not resell or redistribute the file.

Try the free version first — it uses the same maths on five marketplaces: free calculator.