PolicyEngine

Free, open-source tax and benefit analysis. Model policy reforms across the UK.

compute:

Enter PolicyEngine

Trusted by researchers and policy organisations

National Institute of Economic and Social Research

Explore our latest research and tools

Spring Statement 2026 analysis

New OBR forecast and its effects on UK living standards

Two-child limit reintroduction

Budgetary, distributional, poverty, and inequality impacts across the UK

Salary sacrifice cap analysis tool

Revenue and distributional impacts of capping pension salary sacrifice

Student loan deductions calculator

Repayments, marginal tax rates, and lifetime costs for UK graduates

Want custom analysis? Contact us

Expert policy analysis

View all research →

Sep 11, 2026

Marriage calculator

Compare a couple's taxes and benefits when living together against living in separate households, modelled with PolicyEngine UK.

Open →

Sep 3, 2026

Free childcare hours and a 75% subsidy

Estimate the cost and household impact of 15 free childcare hours from 9 months plus a 75% subsidy replacing Tax-Free Childcare, modelled with PolicyEngine UK.

Open →

Aug 4, 2026

Who bears the AI shock? Distributional and fiscal incidence in the UK

PolicyEngine traces AI employment, wage and capital shocks through the UK tax-benefit system, estimating the budgetary and distributional impacts across incidence scenarios.

Read →

Jul 23, 2026

£2 bus fare cap analysis

Estimate the cost and household impact of capping single bus fares at £2 in England outside London for calendar 2027, modelled with PolicyEngine UK.

Open →

Jul 21, 2026

Temporary VAT cut on domestic electricity

Estimate the fiscal cost and distributional impact of cutting VAT on domestic electricity from 5% to 0% for six months from October 2026, modelled with PolicyEngine UK.

Open →