Who runs this

About StubMath

Ethan Chen

I'm an independent developer. StubMath is a one-person project: I write the formulas, the test suite, and the pages. My code lives at github.com/CodeForgeX.

Why this site exists

Most free payroll calculators give you a number and ask you to trust it. The page that ranks #1 for a big paycheck query took over two minutes to load its calculator when I timed it; others hide the formula, skip state rules silently, or quietly get the FICA order of operations wrong.

This site takes the opposite bet: show the work. Every calculator publishes its formula, ships with test cases anyone can read, and cites the regulation it leans on. If that makes the site smaller — fewer tools, none of them a 50-state tax engine — that's the trade.

What I will and won't claim

• I am not a CPA, EA, or tax attorney, and nothing here is tax or legal advice.
• Every tool on this site is pure arithmetic whose correctness is proven by the public test suite — that's the admission rule, and it's why there's no state withholding calculator here.
• If a page ever needs professional review, it will be commissioned and named — no borrowed credentials, no invented reviewers.

Found an error?

Open an issue on GitHub. A confirmed error becomes a failing test case first, then a fix, then a changelog entry — in that order, so the same mistake can't come back.