Tax-Calculator
Federal income and payroll tax microsimulation from the Policy Simulation Library.
What it does
A microsimulation model for static, conventional analysis of US federal individual income and payroll taxes, applied to population samples to simulate tax scenarios and policy changes. A Python package (pip install taxcalc, Python 3.12 to 3.14) with an API and CLI, documented at PSLmodels.github.io/Tax-Calculator. The project is seeking contributors and maintainers; CC0-1.0.
Where it fits on the map
- Company tax department › Employment & Payroll TaxEmployment & payroll taxespartly covered
Named as a project to start with: The US microsimulation covers payroll taxes as part of federal tax; nothing on the list runs a payroll.
- Company tax department › Tax Policy & Stakeholder EngagementTax policy & stakeholder engagementpartly covered
- Tax authority › Policy, Legislation & Revenue AnalysisReform costing & microsimulationcovered
Named as a project to start with: Both are maintained microsimulations with documentation and tests; OpenFisca France does the same for France.
In the processes
- Legislative changeStep 2 · Model the impact
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Of the same kind, for a shared jurisdiction or tax area. Not a ranking.
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Maintain this project?
Link to this page from your README, so readers find the facts, the notes and where it fits. The badge is a small SVG served from this site.
[](https://tax-oss.com/projects/taxcalc/)