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One-time prices, no subscription.

The Profit Calculator is free with your email. The Profit Tracker and Pro are bought once and kept, with no subscription. Each edition is the same Google Sheet with more tabs. Launch prices run from November 23 to December 7, 2026.

ProfitStamp Profit Calculator

Free with your email

Price-check an item across five marketplaces before you list it. Free with your email.

  • Know where an item nets the most before you list it
  • Fees, payout, profit, margin and breakeven for five marketplaces from one set of inputs (Profit Calculator)
  • Every fee dated, with its official source (Platform Fee Settings)
  • Start Here, Setup and Help tabs
Get the Calculator free

ProfitStamp Pro

$44 one-time; $39 from November 23 to December 7, 2026

Everything in the Profit Tracker plus Accountant Export and deeper analytics. The live-show module will arrive as a free update once verified.

  • Everything in the Profit Tracker
  • Your year's totals on one printable page (Accountant Export)
  • How long stock has been sitting, and how much money is tied up in it (inventory aging bands)
  • The live-show module when it ships, at no extra cost
Buy Pro Get the launch price by email
The Profit Tracker's Dashboard: net profit for the year with margin and revenue, the month-by-month bars, the KPI row, and revenue and net profit per marketplace
The Profit Tracker's Dashboard on the sample year.

What's in each edition

Feature Profit Calculator Profit Tracker Pro
Dated fee table with official sources Included Included
Profit Calculator for five marketplaces Included Included
Start Here, Setup and Help tabs Included Included
Inventory, sourcing lots, sales and expenses Not included Included
Dashboard, Monthly Summary and Platform Summary Not included Included
Fee Changelog and Version Notes Not included Included
Accountant Export Not included Included
Inventory aging bands Not included Included
Live-show module (free update once verified) Not included Planned
Fee-change notices and fixes for 6 months Included Included
Email support Included Included
7-day money-back guarantee Not included Included

Get the launch price by email.

One email on November 23, when the launch prices start, and the free Profit Calculator as soon as you confirm. After that, the exact values to enter when a marketplace changes a fee. We confirm your address first, and you can unsubscribe any time.

Which edition are you looking at? Optional.

The terms

Launch window

The Profit Tracker is $24 and Pro is $39 from November 23 to December 7, 2026 (14 days). Before and after that, the regular prices apply: $29 and $44. The Profit Calculator is free. There are no countdowns and no fake "was" prices.

Guarantee

A 7-day money-back guarantee on the Profit Tracker and Pro, no questions asked, paid back through the store you bought from. We guarantee the file works as described, not any business result.

Upgrading later

Calculator to Tracker: buy the Tracker; the Calculator is in it. Tracker to Pro: Pro is a separate copy at its own price today; once the live-show module ships, Tracker buyers get a coupon for about half the gap. An upgrade is a fresh copy of the bigger edition; your Sales and Inventory rows paste across.

Updates

Fees verified as of October 31, 2026. Fee-change notices and fixes are included for 6 months: from purchase for the Tracker and Pro, through the store you bought from, and from signup for the free Calculator, by email. The next edition, v2.0, is a separate product; v1.x Tracker and Pro buyers get 30% off it.

Prices in USD. Google Sheets only; not tested in Excel. Not affiliated with, endorsed by, or sponsored by eBay, Poshmark, Mercari, Depop, Etsy, or Whatnot.