PolicyEngine TAXSIM

What it does

Runs a CSV of households in the TAXSIM-35 input format through PolicyEngine's US federal and state tax calculator and returns TAXSIM-style outputs (income tax, FICA, credits, AMT), plus a compare command. A Python command-line tool installed with uv; native TAXSIM runs need the TAXSIM-35 executable. Years before 2021 route to TAXSIM35; the README lists known state differences.

Where it fits on the map

• Tax authority › Policy, Legislation & Revenue Analysis › Reform costing & microsimulationcovered

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Of the same kind, for a shared jurisdiction or tax area. Not a ranking.

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