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PolicyEngine
2025

Year in Review

A year of democratising policy analysis. From new tools and partnerships to major policy events, we made economic policy accessible to everyone.

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By The Numbers

United Kingdom Impact

1,010
Local Areas

650 constituencies + 360 local authorities modelled

38
Reports & Trainings

New UK content published in 2025

9
Budget Provisions

Modelled in our Autumn Budget 2025 dashboard

Key Achievements

2025 highlights

Major Launch

Autumn Budget 2025 dashboard

Interactive dashboard exploring how all nine budget provisions interact. Compare impacts by income decile, constituency, and year through 2030-31.

Autumn Budget 2025 dashboard
Explore the dashboard
Major Event

PolicyEngine 2.0 Launch

Exclusive showcase at Central Hall Westminster featuring live demos, constituency-level policy impacts, AI-powered analysis tools, and panels on the future of economic policy modelling.

PolicyEngine 2.0 Launch
Event recap
New Tool

GiveCalc UK

Free calculator showing how Gift Aid affects your taxes - see your tax relief, marginal savings rate, and true cost of giving.

Try it
Major Launch

Local areas dashboard

View income, taxes, benefits, and more across all 650 constituencies and 360 local authorities.

Explore your area
New Tool

Public services spending dashboard

Explore how public spending on healthcare, education, transport and other services varies by income level.

View dashboard
Political Analysis

Reform UK manifesto

Analysis of Nigel Farage's four tax-benefit reforms and their £75 billion fiscal impact.

View analysis
Research

Carbon Tax & Dividend

Analysis showing 71% of UK residents would gain income under carbon pricing with equal dividends.

Read analysis
Research

VAT threshold analysis

Using synthetic firm microdata to analyse how VAT threshold changes affect revenues and businesses.

Explore
Research

April 2025 Tax Changes

Analysis of employer NI increase, CGT reforms, private school VAT, and fuel duty changes taking effect.

Read analysis
Training

Video Training Series

11 training sessions covering PolicyEngine basics, advanced features, and policy analysis techniques.

Watch on YouTube
Funding

Nuffield Foundation grant

Awarded £250,000 to expand and localise UK tax-benefit microsimulation capabilities.

Learn more
Documentation

UK Benefits Guide

Comprehensive documentation of all benefits modelled in PolicyEngine UK, including means-tested and non-means-tested programs.

Read guide
Documentation

UK Taxes Guide

Complete documentation of tax components modelled in PolicyEngine UK, including direct taxes, indirect taxes, and proposed taxes.

Read guide
Technology

AI Household Explainer

New feature using large language models to help users understand how taxes and benefits affect their household.

Learn more
Technology

Multi-Agent AI Workflows

Testing Claude Code multi-agent systems for policy research, informing our open-source plugin development.

Read more

Deep Dive

Autumn Budget 2025 Provisions

Our interactive dashboard models all nine major provisions. Click each to read our detailed analysis.

1

Two-Child Limit Removal

Government will remove the two-child benefit cap from April 2026, reducing child poverty by 18%

2

Fuel Duty Freeze

Five-month freeze with staggered reversal of the 5p cut through March 2027

3

Rail Fares Freeze

Regulated rail fares frozen to support commuters

4

Income Tax Threshold Freeze

Personal Allowance and Basic Rate threshold frozen through April 2031

5

Salary Sacrifice Cap

New limits on tax-advantaged salary sacrifice arrangements

6

High Value Council Tax Surcharge

New surcharge on properties over £2 million raising £400 million annually

7

Combined Impacts

How all reforms interact - constituency-level breakdowns and income decile impacts

Explore the full interactive dashboard

Recognition

Citations & Media

PolicyEngine research featured in major outlets and cited by policymakers

Media Coverage

Reform UK Coverage

Farage manifesto cost analysis

PolicyEngine estimates showed £75 billion cost of tax-benefit reforms

Government Citations

HM Treasury

Exploring PolicyEngine

UK government finance ministry considers PE as supplement to existing models

Research & Milestones

UK Timeline

December 2024

Nuffield Foundation grant

Awarded £250,000 to expand and localise UK tax-benefit microsimulation capabilities.

December 2024

AI Household Explainer

Launched AI-powered feature helping users understand how policies affect their household.

February 2025

API Improvements

Major architecture evolution supporting UK and US models.

April 2025

UK Taxes Documentation

Published comprehensive guide to all tax components modelled in PolicyEngine UK.

April 2025

April Tax Changes Take Effect

Analysis of employer NI increase, CGT reforms, private school VAT, and fuel duty changes.

May 2025

UK Benefits Documentation

Published comprehensive guide to all benefits modelled in PolicyEngine UK.

May 2025

Reform UK analysis

Comprehensive cost analysis showing £75 billion fiscal impact of Farage's manifesto proposals.

October 2025

Carbon tax & dividend study

Analysis showing 71% of UK residents gain income under carbon pricing with equal dividends.

October 2025

VAT threshold analysis

Synthetic firm microdata analysis of how VAT threshold changes affect revenues.

October 2025

Multi-Agent AI Research

Testing Claude Code multi-agent systems for automated policy analysis workflows.

November 2025

PolicyEngine 2.0 Launch

Major event at Central Hall Westminster with live demos and expert panels.

November 2025

OBR Forecast Integration

Updated predictions incorporating new OBR forecasts on household income, poverty, and inequality.

December 2025

Autumn Budget dashboard

Interactive tool for exploring budget provision impacts through 2030-31.

December 2025

Local areas dashboard

View income, taxes, benefits, and more across all 650 constituencies and 360 local authorities.

December 2025

GiveCalc UK Launch

Free calculator showing how Gift Aid affects taxes and the true cost of giving.

December 2025

Public services spending dashboard

New tool exploring how public spending on healthcare, education, and other services varies by income.

Open Source

Software Development

Building transparent, open-source tools for policy analysis

80
Repositories
26
Contributors
3,846
Pull Requests
1,964
Code Reviews
View GitHub WrappedSee individual contributor stats→Claude Code PluginAI-powered policy development tools→

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