PolicyEngine

What it does

Free, open-source tax and benefit analysis: a browser app for modelling policy reforms across the US (all 50 states) and the UK, backed by an API and Python packages. The page says it is used by researchers, governments and benefit platforms and names no account or cost. The landing page shows no licence and no disclaimer; the code is linked on GitHub.

Where it fits on the map

• Company tax department › Tax Policy & Stakeholder Engagement › Tax policy & stakeholder engagementpartly covered
• Tax authority › Policy, Legislation & Revenue Analysis › Reform costing & microsimulationcovered

Similar projects

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

• accounting-harnessDeterministic accounting and audit harness with an ASC 740 module for the current and deferred provision.
• Cost-of-Capital-CalculatorCalculates the cost of capital and effective tax rates on new investment.
• DGFiP calculette-irThe M-language rules of the DGFiP engine that computes French income tax and the real-estate wealth tax (IFI).
• EUROMODThe EU tax-benefit microsimulation model, maintained by the Joint Research Centre.
• GETTSIMThe German Taxes and Transfers Simulator: a microsimulation model of German taxes and benefits.
• IRS Fact GraphKnowledge-graph rules engine that models the US Internal Revenue Code, the calculation core of Direct File.

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