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Computing Public Policy for Everyone

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Expert policy analysis

Idaho’s New Individual Income Tax Changes cover image
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April 1, 2025

Idaho’s New Individual Income Tax Changes

The lower top marginal rate and larger grocery tax credit will cost the state $225 million in 2025.

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February 26, 2025

Kentucky Cuts Income Tax Rate

Analysis of lowering Kentucky's 4% income tax rate to 3.5%.

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April 1, 2025

New Ways to Give to PolicyEngine

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March 26, 2025

Analysis of Michigan HB 4170

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March 7, 2025

New York Governor Hochul's Tax Proposals

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March 5, 2025

The Family Income Supplemental Credit (FISC) Act

The Proposed New York City Child Tax Credit cover image
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February 18, 2025

The Proposed New York City Child Tax Credit

Analysis of Senate Bill S2238, introduced by Senator Andrew Gounardes.

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January 21, 2025

The New York Working Families Tax Credit

A comprehensive analysis of the proposal from New York State Senator Andrew Gounardes.

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Compute any public policy reform

With PolicyEngine

Design custom policy reforms

PolicyEngine's country models contains hundreds of customisable policy parameters and can handle structural reforms.

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See how reforms affect households

Evaluate the impact of changes to policy rules on households or entire economics within seconds, and iterate quickly over policy ideas.

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Advanced analysis with our Python packages

Dive deeper into policy impact analysis using PolicyEngine's open-source Python packages. Customize your simulations and perform advanced reforms for thorough insights, all on your own computer.

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PolicyEngine is bringing applied science and rationality to governance. We have the ability to design sustainable, effective systems if we just use all the wonderful data we have at our disposal.

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End Poverty Make Trillions

Darryl Finkton Jr.

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Transparency

We're fully open source

All PolicyEngine models, code, and data are open source and available in their latest form on GitHub, with code, documentation and validation from over fifty open-source contributors. This is our real-time, unfiltered development.

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Our models are tested extensively

PolicyEngine's software undergoes thousands of automated tests every day to ensure our simulations produce accurate results.

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PolicyEngine's API computes policy impacts

Instantly compute taxes and benefits for any household under current or reformed policy rules, using the PolicyEngine REST API, reproducing any result in the web app.

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Screenshot of PolicyEngine's API documentation
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