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Contact
Found a bug, spotted an outdated fee, or want a new calculator? Email jsafridi840@gmail.com.
For Amazon PPC or e-commerce consulting, use the same address or message Jansher on Upwork.
Home / Contact
Found a bug, spotted an outdated fee, or want a new calculator? Email jsafridi840@gmail.com.
For Amazon PPC or e-commerce consulting, use the same address or message Jansher on Upwork.
Built for online sellers and US workers. No sign-up, nothing leaves your browser.
Free, no sign-upEvery calculator is free to use, with no account.
Private by designYour numbers are worked out in your browser and never sent to us.
Sources you can checkRates come from official fee pages and IRS guidance, linked on each page.
Kept up to dateFees and tax figures checked November 2026.