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PolicyEngine/policyengine-us

The PolicyEngine US Python package contains a rules engine of the US tax-benefit system, and microdata generation for microsimulation analysis.

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What it does

PolicyEngine US is an open-source tool that models how US federal and state tax and benefit programs work, letting you calculate how policy changes would affect people's taxes, benefits, and income. It can run those calculations across large population datasets to estimate the broader economic impact of policy changes on things like poverty and inequality.

Why it matters

Builders creating financial planning tools, benefits eligibility apps, or policy analysis platforms can plug into this instead of building complex tax-benefit logic from scratch — backed by 137 contributors keeping it current. With growing interest in tools that help people understand government benefits and tax impacts, this is a rare open-source foundation that would otherwise take years to build.

43Hot

Gaining traction — heating up

Stars
142
Forks
207
Contributors
137
Language
Python

Score updated Apr 10, 2026

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