PolicyEngine UK

We just launched a plugin that brings PolicyEngine to @claudeai. Describe any tax or benefit reform in plain English. Claude runs a full microsimulation using our open-source model — 700+ variables, 1,200+ parameters, NI to UC. No code required. policyengine.org/uk/claude-plug…

Can the government solve the student loan crisis in England and Wales? 💷 And does the system work better in Scotland? 🏴󠁧󠁢󠁳󠁣󠁴󠁿 Watch our analysis featuring new modelling from @PolicyEngineUK and let us know what you think should be done👇 #Peston

Happy Valentine's Day! We just launched PolicyEngine's marriage calculator. Find out if saying "I do" means a bonus or penalty for your household — from the marriage allowance to Universal Credit. Try it: policyengine.org/uk/marriage

Join our webinar today at 1:30PM ET to learn more! us06web.zoom.us/meeting/regist…

Our new dashboard analyses the Scottish Budget 2026-27: 📊 £64m cost in 2026-27 → £196m revenue by 2030-31 📈 Threshold uplifts, SCP expansion, rate freezes 🏠 Household calculator to see your impact Explore: policyengine.org/uk/scottish-bu…

1/3 Excited to share this! For the past 6 months I've been working with the powerhouse No 10 Data Science team @10DowningStreet to push the speed and accuracy boundaries of tax-benefit policy analysis with @ThePolicyEngine 's open source technology.

Read Nikhil's article: fellows.ai.gov.uk/articles/nikhi… And more on our blog: policyengine.org/uk/research/po…

PolicyEngine is now powering rapid policy analysis at 10 Downing Street. Our co-founder and CTO @nikhil_woodruff spent 6 months with the 10DS data science team as an Innovation Fellow, adapting our open-source microsimulation model for government use.

2025 was a landmark year for PolicyEngine UK. 1,010 local areas modelled 38 reports & trainings published 9 Autumn Budget provisions analysed From the Local Areas Dashboard to GiveCalc UK—here's what we accomplished. Explore our interactive year in review: policyengine.org/uk/2025-year-i…

Our complete analysis of the UK Autumn Budget 2025 is now live. New interactive dashboard lets you explore how all 9 provisions interact—by income decile, constituency, and year through 2030-31. Explore: policyengine.org/uk/autumn-budg…

Free at givecalc.org (By the way, PolicyEngine is a registered charity)

Launching GiveCalc for UK taxpayers 🇬🇧 Calculate your Gift Aid tax relief in seconds. Enter your income and donation — see exactly how much you save. ✓ Higher rate relief (40%/45%) ✓ Scottish income tax rates ✓ Personal Allowance taper effects

The UK's first rail fare freeze in 30 years will cost £145m in 2026-27, rising to £775m cumulative by 2030-31. Read our new report for more on the revenue and distributional implications: policyengine.org/uk/research/ra…

See our full analysis for more: policyengine.org/uk/research/uk…

Revenue and distributional impacts vary by behavioural assumptions. Interactive charts let you explore all scenarios.

NEW: How will the £2,000 cap on salary sacrifice pension contributions affect UK workers? We modelled four behavioural scenarios to show how revenue and distributional impacts vary.

The new high value council tax surcharge will raise £400m/year from £2m+ properties. Top 10 constituencies = 35% of revenue. Cities of London & Westminster alone: 10%. Explore our latest Autumn Budget analysis and interactive: policyengine.org/uk/research/hi…

The OBR revised up its inflation and earnings forecasts in the November 2025 Autumn Budget. We compare the projections and explain what changed for PolicyEngine users. policyengine.org/uk/research/ob…