Who builds this
PaycheckBase is a product of PMX Tech Studio, an independent software studio registered in India. The studio builds and runs its own software rather than only client work, and PaycheckBase is one of those products — which is the reason it can afford to withhold a jurisdiction until its figures check out instead of shipping to a deadline.
That is also the honest limit to state up front: this is a software studio, not an accountancy practice. Nobody here is a CPA or an enrolled agent, and nothing on this site is advice. What the studio offers instead is verifiability — every figure traced to the agency that publishes it, every gap disclosed on the page where it applies, and an editorial policy you can hold it to. A tax figure you can check beats one you are asked to trust.
The test of that is what happens when it goes wrong, so the corrections log is public: what each figure said, what it says now, and how the mistake surfaced.
Questions, corrections and anything that looks wrong go to contact@paycheckbase.com.
Our product principle
A polished result is not enough. Users should be able to see which tax year is modeled, which rules are included, which rules are not included, and where the source data came from.
How coverage grows
Coverage spans 50 of the 51 United States income-tax jurisdictions — the fifty states plus the District of Columbia. A jurisdiction is published only after its rates, deductions, payroll assessments, effective dates, and official sources have been checked against that jurisdiction’s own published guidance for the modeled tax year.
The remaining jurisdiction is held back on purpose rather than quietly approximated. Where the calculator cannot yet model a rule correctly — a recapture provision, a credit structure, a local rate that has not been confirmed — the jurisdiction stays unpublished, because a confident wrong number is worse than an absent one.
What comes next
The 401(k) scenario tool, state comparisons, and the 1099 estimator have shipped. An AI advisor was on the roadmap and was dropped: a rules engine that runs in your browser answers the same questions without sending your figures anywhere, and without the risk of a model inventing a tax figure. Trust, calculation quality, privacy, accessibility, and performance remain the launch gates for each phase.
Try the calculator or review the calculation methodology.