Last week, @govdanmckee.bsky.social signed the Rhode Island Fiscal Year 2027 budget, which includes a new refundable Child Tax Credit. Beginning in 2027, taxpayers can claim $330 for each child under the age of 19. Using our RI CTC calculator, we analyzed the impact of this program.

The Bureau of Economic Analysis — the federal agency behind GDP — used PolicyEngine to calculate the taxes in its latest Distribution of Personal Income statistics. The first BEA release built on our open-source model. www.bea.gov/data/special...

Can a language model compute a household’s taxes and benefits from the prompt alone — no tools? We tested 13 frontier models against PolicyEngine on 100 representative US households. New benchmark: PolicyBench. policybench.org

Earn a dollar more, take home less. Benefit cliffs happen when a household loses more in benefits than it gains in earnings. CliffWatch shows where, when, and how — across earnings levels and US states. Live demo Fri May 29, 1pm ET → us06web.zoom.us/meeting/regi...

Join us Thursday at 10am ET for a @pslmodels.org Demo Day on our TAXSIM emulator. Speakers: Dan Feenberg, creator of TAXSIM at @nber.org @pavelmakarchuk.bsky.social, chief of staff at PolicyEngine and creator of our open-source TAXSIM emulator Register here: us06web.zoom.us/meeting/regi...

PolicyEngine at the Code for America Summit this week. Thu 2pm — @daphnehansell.bsky.social on Coverage Compass: how life events change health coverage. Fri 2pm — @maxghenis.bsky.social moderating a panel with three orgs using PolicyEngine to calculate eligibility and amounts. Say hi in Chicago.

New UHERO analysis uses PolicyEngine to simulate Hawaii's childcare credit bills — first the direct household effect of the expanded CDCC, then the integrated CDCC, EITC, SNAP, WIC, and state income tax impact when a second earner enters the workforce in response.

The first analysis from our AI and economics research initiative answers the question: What happens if income shifts from labor to capital? A 10% shift raises the top 1%'s market income share from 25.7% to 29.3%. After taxes and transfers: 21.4% to 24.4%. Policy absorbs 19% of the increase.

NEW INTERACTIVE: Rep. Kristen McDonald Rivet has released the Working Parents Tax Relief Act (WPTRA), which increases the maximum EITC benefit by $5,500 for each child under 4 in a tax unit.

The Living Wage Institute has adopted PolicyEngine for the tax calculations behind their living wage data. Read how our model is improving the accuracy of their household tax estimates — from iterative income solving to local tax coverage. www.livingwage.institute/post/how-we-...

How much would California's billionaire wealth tax actually raise? It depends on your assumptions about avoidance, departures, and income tax loss. We built an interactive calculator that lets you explore the tradeoffs — with presets calibrated to existing papers.

Introducing the PE-84. The world's first graphing microsimulator. Pre-order now: policyengine.org/pe84

The Joint Economic Committee just released an Immigration Fiscal Impact Calculator powered by PolicyEngine's tax and SNAP calculations. Try it here: www.jec.senate.gov/public/index...

We updated the State Legislative Tracker: You can now track tax bills across all 50 states, see each bill's legislative stage, follow real-time activity, and jump to full PolicyEngine analysis. Try it at policyengine.org/us/state-legislative-tracker

With our new calculator for the Temporary Assistance for Needy Families (TANF) cash assistance program, you can estimate TANF eligibility and benefit amounts for any household across all 50 states and DC.

NEW: Rhode Island HB8338 would create a $660 Child Tax Credit for children under 19, while eliminating the dependent exemption for qualifying children. We estimate that in 2027 it would: • Cost $107 million • Benefit 43% of Rhode Island residents • Lower child poverty by 4.4%

The Common Sense Institute's new affordability report calculates state and federal income tax using PolicyEngine as part of its cross-state analysis of household costs.

@prospect.org draws on PolicyEngine analysis in a new piece on competing tax-cut proposals, citing our estimates of poverty effects, distributional impacts, and fiscal cost. prospect.org/2026/03/16/d...

A treat to join the MyFriendBen team's AI design session at Gary Community Ventures in Denver this week. Their open source multi-benefit screener, powered by the @us.policyengine.org API, has already helped over 65,000 families across five states identify benefits they might be eligible for.

In a new report, the Committee for a Responsible Federal Budget cites PolicyEngine modeling as part of its surtax analysis. We estimate that a 1% surtax on AGI between $100K and $1M, plus a 2% surtax above $1M, would raise about $900 billion over a decade. www.crfb.org/papers/break...

NEW ANALYSIS: @booker.senate.gov's Keep Your Pay Act - higher standard deduction, expanded CTC & EITC, higher top tax rates. Static model finds: - $5.2T 10-year cost - 73% of households gain, 1.6% lose in 2026 - Poverty falls 10% in 2026 We also provide a personalized calculator.

We've partnered with @nber.org to build the next chapter of TAXSIM — an open-source, drop-in replacement powered by PolicyEngine's microsimulation engine. Works with CLI, Python, R, Stata, SAS, and Julia. Try it here: policyengine.org/us/taxsim

We just launched a plugin that brings PolicyEngine to Claude. Describe any tax or benefit reform in plain English. Claude runs a full microsimulation using our open-source model — 4,000+ variables, 65,000+ parameters, all 50 states. No code required. policyengine.org/us/claude-pl...

NEW: Governor Dan McKee's office used PolicyEngine's Rhode Island Child Tax Credit Calculator to design the CTC proposal in his FY2027 budget. Here's how the tool came together and what the Governor's proposal would do 🧵

Sens. Hassan (D-NH) and Young (R-IN) introduced the Stronger Start for Working Families Act—removing the $2,500 earnings threshold for the refundable Child Tax Credit. PolicyEngine analysis: - Costs $14.6B over 10 years - Benefit 5.9% of Americans www.policyengine.org/us/research/...

Utah SB60 would cut the state income tax rate from 4.5% to 4.45%, reducing revenues by $84 million in 2026. Who benefits? 53% of Utahns, with higher earners saving more in absolute terms. Our analysis breaks down winners by income decile: policyengine.org/us/research/utah-sb60-income-tax-reduction

2025 was our biggest year yet. 62 jurisdictions modeled 100K+ people discovering benefits 50+ research reports From OBBBA to state and local models to premium tax credit simulations—here's everything we built. Explore our 2025 in full: policyengine.org/us/2025-year...

Last day to make tax-deductible donations in 2025. GiveCalc by @policyengine.org shows exactly how much your charitable giving saves on federal and state taxes—before midnight tonight.

We've signed an MOU with @atlantafed.org to integrate their Policy Rules Database into our validation infrastructure. Combined with @nber.org TAXSIM, we now have three-way validation—and our TAXSIM work has already improved both models. Read more: policyengine.org/us/research/...

This Giving Tuesday, know what your donation actually costs. GiveCalc calculates your federal + state tax savings on charitable donations — all 50 states (plus DC and NYC), 2024-2026 tax years, HR1 changes included.

Wishing everyone a warm Thanksgiving filled with good food and good company 🧡

In a new article for @jacobinmag.bsky.social, @dtrim99.bsky.social uses PolicyEngine to calculate the impact of @reprashida.govpeeps.us's "Economic Dignity for All Agenda" on poverty, inequality, and the budget. jacobin.com/2025/11/tlai...

In a new article for People's Policy Project, @dtrim99.bsky.social used PolicyEngine to estimate the impact of @reprashida.govpeeps.us's Economic Dignity for All Agenda, finding the cash assistance package would (in 2026): * Reduce poverty by 42% * Lower the Gini index by 8.1% * Cost $685 billion

PolicyEngine is at @natltax.bsky.social in Boston! ✅ This morning: Calibrating Survey and Admin Data to Enable Local Tax Microsimulation — presented by Ben Ogorek 📅 Tomorrow (Fri 8:30 AM, Westin Copley Adams Rm): Simulating Reforms to Taxation of Social Security Benefits — join us!

BREAKING: PolicyEngine's microsimulation model projects a surge in candy consumption in the coming hours. Happy Halloween! 🎃

Missed our webinar introducing the ACA calculator? Catch the recording and see how extending enhanced subsidies would affect different household types across the country: youtu.be/ni0DI4cHECI

California's proposed billionaire tax creates marginal rates of 50-60% on wealth between $1.0-$1.1 billion due to its phase-in structure. We analyzed the math behind Initiative 25-0024: policyengine.org/us/research/...

Join us this evening at our new office! luma.com/lnrzph2h

We used Claude Code to choose our DC office. Built an interactive comparison tool → analyzed 8 coworking spaces → picked @opengovhub.bsky.social. Now we're surrounded by 40+ civic tech and policy organizations in the heart of DC 🧵

The Prenatal-to-3 Policy Impact Center just launched their new Policy Impact Calculator, which uses @us.policyengine.org for federal and state tax modeling. Great example of research infrastructure enabling better policy decisions for young children and families. pn3policy.org/policy-impac...

Our new ACA calculator shows how extending the enhanced premium tax credits would affect households. An extreme case: A 64-year-old in Fairbanks, AK would gain $655 in 2026 if they earn $61k, but gain $26,861 if they earn $62k. Try it here: policyengine.org/us/aca-calc

🤝 Big news: PolicyEngine and @nber.org have signed an MOU to ensure researchers worldwide continue accessing critical tax microsimulation tools. We're building an open-source TAXSIM emulator, combining NBER's 50+ years of tax expertise with modern open-source infrastructure.

🎉 PolicyEngine has been awarded a $300,000 Phase I POSE grant from NSF (Award No. 2518372) to expand our open-source platform, build sustainable governance, and grow our contributor community! https://policyengine.org/us/research/nsf-pose-phase-1-grant

How do energy policies like carbon taxes, LIHEAP, or EV credits impact households? We recap PolicyEngine's open-source tools for analyzing these effects in the US & UK. Learn more in our latest post, featuring insights from the Open Sustainability Policy Summit: policyengine.org/us/research/...

Happy Tax Day Everyone! Last year I turned 25 and started a new job in August. Because of my age and earnings in 2024, I qualified for the Earned Income Tax Credit! Using @us.policyengine.org, I can calculate my federal EITC and state EITC, as well as my taxes and net income.

A fun new tool from @maxghenis.bsky.social : a calculator for charitable contributions, including both state and federal effects and interactions with other deductions. Lots of other good bells and whistles. @nicduquette.bsky.social should be into this. policyengine.org/us/research/...

The OECD's new report highlights how governments are translating regulations into executable code to make public services more consistent, transparent and efficient. This is exactly why we're building PolicyEngine! Read more: www.oecd.org/en/publicati...

Free, open-source policy analysis tools are essential for evidence-based policymaking. Grateful for NEO Philanthropy's support in expanding access to sophisticated microsimulation modeling.

Want a job doing #RukesAsCode?

Great to see @pn3policy.bsky.social continuing to expand the breadth and depth of their Policy Impact Calculator here at APPAM! Among their many sources are tax calculations from @policyengineus.bsky.social.