A UK credit score is a lender's estimate of how reliably you repay borrowing. It's built from your credit history by agencies (Experian, Equifax, TransUnion), and you improve it mainly by paying on time, using little of your available credit, and keeping accounts in good standing.
What affects your score
- Payment history — paying on time is the biggest factor.
- Credit utilisation — using a small share of your available credit (under ~30%) helps.
- Length of history — older, well-managed accounts help.
- Recent applications — many applications in a short time can lower it.
- Electoral roll — being registered to vote helps lenders verify you.
How to improve it
Pay every bill on time, keep balances low, register on the electoral roll, avoid multiple applications at once, and check your report for errors. Improvements show over months, not days.
Why it matters
A stronger score means easier approval and lower interest on mortgages, loans, and cards — which can save thousands over a lifetime.