Research and analysis
Read PolicyEngine's research on recent and proposed policy reforms, as well as technical and general updates from the organisation.
82 results
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.
April 1, 2025
New Ways to Give to PolicyEngine
Exploring state tax credits for charitable giving.
March 26, 2025
Analysis of Michigan HB 4170
We project the bill, which would reduce Michigan’s tax rate from 4.25% to 4.05%, would cost $644 million in 2025.
March 7, 2025
New York Governor Hochul's Tax Proposals
PolicyEngine analyzed several individual income tax policies included in Governor Kathy Hochul's FY2026 budget.
March 5, 2025
The Family Income Supplemental Credit (FISC) Act
Representative Jared Golden’s Child Tax Credit reform would cost $193 billion in 2026 while reducing poverty and inequality.
February 26, 2025
Kentucky Cuts Income Tax Rate
Analysis of lowering Kentucky's 4% income tax rate to 3.5%.
February 18, 2025
The Proposed New York City Child Tax Credit
Analysis of Senate Bill S2238, introduced by Senator Andrew Gounardes.
February 5, 2025
How We're Improving our API in 2025
PolicyEngine's API target architecture for 2025.
January 21, 2025
The New York Working Families Tax Credit
A comprehensive analysis of the proposal from New York State Senator Andrew Gounardes.
January 17, 2025
Analysis of the Family First Act
We project that Representative Blake Moore's Child Tax Credit bill would raise revenue and reduce poverty.
December 29, 2024
PolicyEngine US in 2024: A year in review
From state-level modeling to AI-powered analysis, we expanded the frontier of policy research through technology.
December 27, 2024
PolicyEngine US Launches Behavioral Responses
We've expanded our modeling framework to capture how policy changes affect labor supply.
December 26, 2024
New AI Feature Helps People Understand Their Taxes and Benefits
We’re applying large language models to clarify complex policy rules.
December 18, 2024
NEO Philanthropy Awards $200,000 Grant to PolicyEngine
Economic Mobility & Opportunity Fund supports expanding access to policy analysis tools.
December 10, 2024
Louisiana Transitions to a Flat Tax
Analysis of the individual tax changes signed into law by Governor Jeff Landry.
December 3, 2024
Introducing GiveCalc
Calculate the true cost of charitable giving.
November 19, 2024
Federal Tax Inflation Adjustments for Tax Year 2025
PolicyEngine has updated all relevant federal tax parameters based on the latest IRS announcements.
November 3, 2024
How Would Each Presidential Candidate’s Economic Plans Affect Your Household?
PolicyEngine has created a personalized calculator for the 2024 presidential election’s tax proposals.
October 31, 2024
Donald Trump's Economic Agenda
PolicyEngine projects three provisions of Donald Trump’s tax plan would cost $5.4 trillion over the next ten years.
October 28, 2024
Extending the Tax Cuts and Jobs Act
PolicyEngine projects extending the TCJA individual tax provisions would cost $3.9 trillion over a ten-year budget window.
October 24, 2024
Kamala Harris’s Earned Income Tax Credit Expansion Proposal
PolicyEngine projects that restoring the American Rescue Plan policy would cost $144 billion (static) or $201 billion (dynamic) over a decade, while lowering poverty by 1.6% in 2025.
October 7, 2024
Exempting Social Security Benefits from Income Taxation
PolicyEngine projects that former President Donald Trump’s proposal would cost $1.4 trillion over the budget window.
September 29, 2024
How the Oregon Rebate May Affect Poverty Rates
Our model finds the ballot measure could reduce poverty by between 22% and 35%, without macroeconomic effects.
August 22, 2024
How the Rent Relief Act of 2019 Varies with Income and Location
We show the impact on different households of the tax credit bill introduced by then-Senator Kamala Harris.
August 21, 2024
Individual Income Tax Provisions in Minnesota Bill HF1938 (2023)
The reform signed by Governor Tim Walz expanded credits for low-income families, reduced taxes for middle-income retirees, and raised taxes for high-income filers.
August 17, 2024
Kamala Harris’s Child Tax Credit Proposal
We analyze the Democratic nominee’s proposal to expand the 2021 expansion, giving $6,000 to parents of newborns.
August 13, 2024
PolicyEngine at the 117th Annual Conference on Taxation
Exploring AI applications and enhanced data for tax policy analysis.
August 11, 2024
Analysis of JD Vance’s Suggested $5,000 Child Tax Credit Expansion
Impacts of the vice presidential nominee’s reform depend largely on its uncertain refundability.
July 22, 2024
Kamala Harris's LIFT Act Middle Class Tax Credit
A comprehensive analysis of the Vice President's 2018 proposal.
July 12, 2024
PolicyEngine Powers Niskanen Center's Analysis
Three new reports from the Niskanen Center think tank demonstrate PolicyEngine's tax and benefit reform model.
April 15, 2024
PolicyEngine launches state income tax modeling nationwide
Free, open-source platform now covers all 50 states and D.C., just in time for tax season.
March 27, 2024
Individual income tax provisions of President Biden's 2025 Budget
PolicyEngine projects the impact of expanding tax credits and raising taxes on high-income filers.
March 25, 2024
Child Tax Credit Provisions of the Tax Relief for American Workers and Families Act
How the Wyden-Smith bipartisan tax package would affect families through 2025.
March 25, 2024
Beta-launch: PolicyEngine's enhanced microdata for policy analysis
By integrating and calibrating multiple datasets, PolicyEngine makes world-class tax-benefit microsimulation modeling available to anyone.
January 11, 2024
Preliminary analysis of the Wyden-Smith Child Tax Credit expansion
PolicyEngine estimates the impact of the reported compromise to expand the Child Tax Credit's refundable component.
August 2, 2023
Dive Into New Mexico's Income Tax Analysis on PolicyEngine
Expanding our tax calculator and reform simulator capabilities to the Land of Enchantment.
July 14, 2023
Scott Winship's individualized Earned Income Tax Credit proposal
An analysis and note on the value of open-source models.
June 19, 2023
Unveiling poverty impacts by race and ethnicity
A new feature from PolicyEngine reveals how customizable tax and benefit reforms affect poverty rates for Black, White, Hispanic, and other Americans.
June 8, 2023
Analysis of the Working Families Tax Cut Act
How the proposal to increase the standard deduction would affect households and society.
June 8, 2023
Analysis of Guaranteed Income for the 21st Century
The proposal from the New School and the Economic Security Project would lower poverty and inequality while expanding cliffs.
May 2, 2023
How PolicyEngine shaped the outcome of the $1 million bet James Medlock won today
Our free tax calculator helped determine Balaji Srinivasan's $500,000 payments to Medlock and GiveDirectly.
April 26, 2023
Digital Public Goods Alliance recognizes PolicyEngine as a Digital Public Good
The UN-endorsed initiative highlights PolicyEngine's open source approach to supporting the Sustainable Development Goals.
April 23, 2023
Kansas's Flat Tax Proposal — SB169
We review how the bill works and model its impact with PolicyEngine US.
April 17, 2023
Introducing Utah State Income Tax Analysis on PolicyEngine
Expanding our tax calculator and reform simulator capabilities to the Beehive State.
April 16, 2023
Analysis of the DC Financial Support for Families with Children Amendment Act
Evaluating Councilmember Zachary Parker's second Child Tax Credit proposal of 2023.
April 8, 2023
PolicyEngine adds New York Family Assistance (TANF) to US model
Enhancing analysis of public policy impacts on needy families.
April 7, 2023
Introducing California income tax analysis on PolicyEngine
Expanding our tax calculator and reform simulator capabilities to the most populous state.
April 3, 2023
Revolutionizing policy analysis with AI
Discover PolicyEngine's new GPT-4 integration and audience modes.
April 3, 2023
Announcing the addition of Kansas income tax to PolicyEngine
We've expanded our tax calculator and customizable reform simulator to the Sunflower State.
April 2, 2023
The District Child Tax Credit proposal
Analysis of DC Councilmember Zachary Parker's new legislation.
March 27, 2023
Restoring the American Rescue Plan's Earned Income Tax Credit Expansion
We review how the expansion works and model its impact with PolicyEngine US.
March 24, 2023
FiscalSim and PolicyEngine: Emphasizing collaboration and open-source acknowledgment
The Center for Growth and Opportunity launches FiscalSim, a US policy-computing web app drawing heavily from PolicyEngine's work.
March 23, 2023
How much should James Medlock donate to GiveDirectly?
We built a mini-app with the policyengine-us Python package to crunch the implications of a Twitter bet.
March 17, 2023
Automate policy analysis with PolicyEngine's new ChatGPT integration
Score an economic impact in a few clicks. Write a report in one more.
March 15, 2023
Oregon's nonrefundable exemption credit: a closer look
PolicyEngine computes the program's impact on Oregon and individual households.
March 8, 2023
Breaking down poverty impacts by sex
PolicyEngine estimates the impact of customizable policy reforms on poverty — overall, by age, and now by sex.
March 3, 2023
Massachusetts Governor Maura Healey's FY 2024 Budget Recommendation
PolicyEngine estimates the distributional impact of two provisions and the household impact of four provisions.
February 15, 2023
OpenFisca wins Edge of Government's Innovation Award
The success of Rules as Code and its impact on citizens.
February 10, 2023
Restoration of the American Rescue Plan Act's expanded Child Tax Credit
PolicyEngine computes how the 2021 policy would affect Americans and America in 2023.
February 9, 2023
The Child Tax Credit in 2023
We review how the program works and compute its impact with PolicyEngine US.
February 2, 2023
How would reforms affect cliffs?
We've added a new feature to the US version of PolicyEngine that lets you see how your reforms affect cliffs.
January 12, 2023
The New PolicyEngine
We're exiting beta with the most accessible tax and benefit model ever built.
January 12, 2023
From idea to impact: scoring a policy reform on the new PolicyEngine US
A walkthrough of the new app on a US tax-benefit reform.
December 30, 2022
PolicyEngine's 2022 year in review
A year of launches, analysis, and building for the future.
December 28, 2022
Enhancing the Current Population Survey for policy analysis
We've used modern data science techniques to make PolicyEngine the UK's most accurate microsimulation model. In 2023, we'll do the same in the US.
December 23, 2022
Updating PolicyEngine to reflect SNAP reform in the omnibus bill
A step-by-step guide to syncing our code with the latest legislation.
November 29, 2022
How charitable contributions affect Americans' taxes
PolicyEngine estimates the tax impact of your donations for free.
November 22, 2022
Maryland's standard deduction
PolicyEngine computes the program's impact on Maryland and individual households.
November 10, 2022
From OpenFisca to PolicyEngine
OpenFisca has catapulted our progress, and now we've forked it into our own microsimulation framework.
November 4, 2022
Oregon's Nonrefundable Exemption Credit
PolicyEngine computes the program's impact on Oregon and individual households.
October 28, 2022
Estimating your Supplemental Security Income benefits in PolicyEngine
Enter your household information, and our free web app will estimate your SSI — plus other taxes and benefits.
October 24, 2022
Computing your Oregon Earned Income Tax Credit in PolicyEngine
We walk you through it step by step.
October 21, 2022
PolicyEngine launches in New York state
New Yorkers can now estimate their state income taxes alongside federal taxes and benefits — and change the rules, too.
September 27, 2022
How to simulate basic and guaranteed income policies in PolicyEngine US
From universal basic income to age-dependent means-tested payments, we've got you covered.
August 10, 2022
PolicyEngine launches in Washington state
Washingtonians can now compute the impacts of the Working Families Tax Credit and federal reforms.
August 5, 2022
Electric vehicle tax credits under current law and the Inflation Reduction Act
Use PolicyEngine US to analyze provisions of the potential reconciliation bill.
July 1, 2022
The new PolicyEngine US Population Impact page
You design the policy. We compute the poverty, inequality, and budgetary impacts.
June 9, 2022
PolicyEngine at the BIG Conference and the Beeck Center’s Rules as Code Demo Day
Register for the BIG Conference June 23–25 and the Rules as Code Demo Day June 28
April 29, 2022
How developers can explore the PolicyEngine API
The UK API explorer and US API explorer describe variables and policy parameters in our models.
March 31, 2022
PolicyEngine arrives stateside
Today, we're beta-launching PolicyEngine US and several other new features.
December 29, 2021
PolicyEngine's 2021 year in review
PolicyEngine's inaugural year was a substantial one for public policy.
October 15, 2021
Make Everyone a Policymaker
Today we're (re)launching PolicyEngine to give the public unprecedented insight into the tax and benefit system.
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