NEW REPORT: We project the Ways and Means Committee's SALT cap ($30K, phasing down to $10K at high incomes) would: - Raise $937B over 2026-35 - Reduce net income for 5.2% of US residents - Lower the Gini index of income inequality by 0.4% Full report in next post:

🔍 NEW REPORT: Replacing the reconciliation bill's $30k->$10k SALT cap with the SALT Caucus's $62K cap ($124k for joint filers) would cost $497B over 10 years, while benefiting 3.7% of residents.

Utahns, join us in 30 minutes to learn about our simulation of recent changes to the tax rate, child credit, and Social Security credit! Link in next post.

On April 28th, Governor Greg Gianforte signed House Bill 337, which reduces the state’s top income rate from 5.9% to 5.4% by 2027. The bill also increases the threshold for the lower income bracket and expands the state’s EITC match to 20% of the federal credit.

NEW ANALYSIS: We examined the Manager's Amendment to H.R.1, which modifies SALT deductions, AMT provisions, and itemized deduction limitations. Compared to the pre-amendment version, we found this would reduce revenue by $22 billion from 2026-35. 🧵

New coverage from The The Independent features our research. Link in thread:

New analysis: The 2025 American Family Act would expand the Child Tax Credit to $4,320 for children under 6 and $3,600 for children 6-17, with a $2,400 baby bonus for newborns. Our microsimulation shows the policy would cost $2.5 trillion over 10 years and cut child poverty 25%.

On SALT: Thanks to PolicyEngine US we can see that families (married w/ at least 1 kid) making $250k or $500k living in NY, NJ, and CA and in the 90th percentile (!) for itemized deductions pay lower taxes under either House or Senate OBBB but with a $30k SALT cap. Link below:

New: Arnold Ventures used PolicyEngine to compare taxes between TCJA expiration and House & Senate reconciliation bills, with $30k SALT cap. Married filers with one child, income of $250k/$500k, and 90th percentile deductions pay less tax under reconciliation bills in CA/NY/NJ.

Congratulations to Nava Public Benefit Corporation Labs on receiving the $1.5M Google.org grant! This will enable expanded AI capabilities with our partner Imagine LA. Our API calculates benefit amounts for Imagine LA's Benefit Navigator, and we're excited to be part of this growing community helping

🆕 We've launched the OBBBA Household Explorer—an interactive tool showing how the reconciliation bill affects individual households across America. Explore 40,000+ representative households from our microsimulation-grade dataset:

We're estimating the effect of PolicyEngine US's nonpartisan evidence on legislators' beliefs & voting behavior--and building state legislative district breakdowns of our results. Here's a mockup (the automated demo is...draft): policyengine.github.io/state-legislat…

🎥 NEW: See how the One Big Beautiful Bill Act affects 20,000+ representative American households with our interactive tool. Every dot is a realistic household from our model. Explore by income, state, family type, and specific provisions like the child tax credit and SALT cap.

🎉 @thepolicyengine has been awarded a $300,000 Phase I POSE grant from U.S. National Science Foundation (Award No. 2518372) to expand our open-source platform, build sustainable governance, and grow our contributor community. We're grateful for NSF's support in democratizing policy analysis!

🤝 Big news: PolicyEngine and NBER 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.

How would changing the VAT threshold from £90k affect revenues? Our new firm microsimulation model shows: • £70k threshold: +£642m revenue • £100k threshold: -£371m revenue • £120k threshold: -£1.1bn revenue All estimates for 2026-27.

📍 London | 25th September | Central Hall Westminster PolicyEngine 2.0 and the future of public policy analysis Join us for live demos, breakthrough research presentations, and networking with leaders shaping evidence-based policymaking. 12:00-18:00, lunch & reception included

Enjoyed my conversation with @SVICPodcast about how PolicyEngine uses Claude Code to democratize economic policy analysis. Watch here: youtu.be/4apWdJR9-iY?si…

Economic policy drinks tomorrow in London 🍺 Thursday 6-8pm at The Sherlock Holmes (Northumberland St, near Embankment) Light bites + first round on PolicyEngine. Come meet economists & policy analysts working on UK tax/benefits/public finance. luma.com/oz1qt2ec

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