PolicyEngine US

PolicyEngine US is a microsimulation model of the United States state and federal tax and benefit system. It is a Python package for analyzing how taxes and benefits affect people, households, and the wider population, and for estimating the effects of policy reforms.

The package contains a rules engine for the US tax-benefit system along with microdata generation for microsimulation analysis. With it you can compute a household's taxes and benefits or model how a proposed change would alter outcomes across the country.

It installs from PyPI with pip as policyengine-us and runs locally on your own machine. The same model also powers the interactive calculator and reform tools at policyengine.org/us.