What changed borrowing since
Change in public sector net borrowing, £ billion. Above zero adds to borrowing; below zero reduces it.
Three big stories
AI project Built by Claude, an AI model, and checked by a person. How it was built →
The fiscal rules
- What it says
- How it's measured
- Why it matters
How this Budget changed it
Who gains and who loses
Borrowing
Public sector net borrowing, % of GDP
Debt
Public sector net debt, % of GDP
Tax take
National Accounts taxes, % of GDP
The economy
The OBR's forecast for growth, prices, jobs and living standards.
Topics
Explore by topic
What the Budget means for the areas people care about: the measures, the money and the bigger picture.
Topic Draft
The measures
What it means
Where it lands
Further reading
Policy scorecard
Every measure, costed
All the policy decisions on the Treasury's scorecard, with what each one raises or costs per year. Filter by topic or type, or search for something specific.
Budget for me
What's in it for you?
Pick whatever describes you, as many as you like. We'll show the Budget measures that change money or services for people like you, biggest first.
About you
These are measures that apply to groups like yours, not a personal calculation: how much you gain or lose depends on your circumstances. Bars show each measure's effect on the public finances. Groups are our labels, checked by hand.
Places
Where it lands
Find your constituency to see how exposed it is to Budget measures, and how public money is spread across the UK. These maps show who is affected and where money is spent. They don't estimate the Budget's impact on each area.
About
Budget Explorer turns the official Budget documents into something you can explore on the day. It is built from the published data, not from our own modelling.
Built with AI
This is an AI project. Budget Explorer was built by Claude, Anthropic's AI model, working in Claude Code from plain-English instructions. Claude wrote the code that reads the Treasury's and the OBR's spreadsheets and PDFs, built the charts, maps and site, drew the illustrations, researched the themes for Budget 2026, drafted the written copy, suggested which topics and groups each measure affects, and checked the numbers in the copy against the source tables. AI can make mistakes, so for expert analysis read the IFS and the Resolution Foundation, linked throughout.
Sources
- Office for Budget Responsibility: (charts and tables, detailed forecast tables).
- HM Treasury: : the policy decisions scorecard and Impact on households; Country and Regional Analysis 2025.
- DWP: Universal Credit households affected by the two-child limit, by constituency (April 2025).
- Ministry of Defence: Regional expenditure with industry 2025/26.
- Devolution: area status and mayors from our sister site Devolution Explorer; constituencies matched to areas using the ONS LSOA-to-constituency (July 2024) and district-to-county (April 2023) lookups. Where a constituency spans more than one area, each is shown with its share.
- Maps: constituency hex layout by Open Innovations; postcode lookup by postcodes.io. Constituencies use the July 2024 boundaries; regions are ITL1.
Inspiration and further reading
The format is inspired by the post-Budget analysis of the Institute for Fiscal Studies and the Resolution Foundation. Read them for the expert view. This site is independent and isn't affiliated with or endorsed by either organisation.
How to read the numbers
- Measure costings are the Treasury's, certified by the OBR, in £ million rounded to the nearest £5m. "Raises" means the measure improves the public finances (higher tax or lower spending); "costs" means the opposite.
- Each measure is labelled "tax" or "spending" according to its largest effect, which is how the Treasury classifies it.
- Topic and "For you" labels are ours. Claude suggested them and a person checked each one.
- Headroom is the margin against the government's fiscal rules in the target year, as estimated by the OBR.
Feedback and suggestions
Spotted a mistake, or have an idea for the site? Tell us here.