Credit Score UK: How Credit Scores Work and How to Improve Yours

Credit Scores in the UK: How They Work and How to Build a Better One

Your credit score feels like a single verdict on how trustworthy you are with money. In the UK it is nothing of the sort. There are three main credit reference agencies, each with its own score, and the lender deciding whether to approve you usually ignores all three and runs its own calculation instead. What really matters is the information underneath: your credit report.

This guide explains how credit scores in the UK work, what goes on your report, what helps and what hurts, and how to build or repair a credit file. It ends with a 90-day plan you can start today, without paying for anything.

A person holding a bank card in one hand while typing on a laptop — Photo by rupixen on Unsplash

What a credit score is and who uses it

A credit score is a number that sums up how risky you might look to a lender, based on the information in your credit report. The scores you can see through free apps and websites are produced by the credit reference agencies as a guide for you. Lenders, landlords, mobile phone networks and energy suppliers look at your report as well, but most of them combine it with what you tell them on the application and their own data to produce an internal score that you never see.

That is why one lender can turn you down while another accepts you on the same day. Neither of them has used the number on your phone. They have each applied their own rules to the same information.

Credit reference agencies: Experian, Equifax, TransUnion

Three agencies hold most consumer credit information in the UK: Experian, Equifax and TransUnion. Lenders choose which of them to report to and which to search, so your file can look slightly different at each one.

Agency	Score range	Your free copy
Experian	0 to 999	Statutory credit report, free on request
Equifax	0 to 1,000	Statutory credit report, free on request
TransUnion	0 to 710	Statutory credit report, free on request

Score ranges as published by each agency at the time of writing (October 2026). Lenders do not use these numbers directly.

The Information Commissioner’s Office explains that you have the right to a copy of the information each agency holds about you, free of charge, and that the agency normally has one month to respond. Most people now see their file through each agency’s free online service or a partner app.

What is on your credit report

Your credit report is a record of how you have managed credit and certain bills. It typically includes:

Credit cards, loans, mortgages, car finance and buy now pay later agreements reported by the provider, with your monthly payment history.
Current accounts, overdrafts, mobile phone contracts and some utility accounts.
Whether you are on the electoral register at your address.
Public records such as county court judgments, bankruptcies and individual voluntary arrangements.
Searches made by lenders when you apply for credit.
Financial associations: people you hold joint credit with.

It does not include your salary, your savings, your criminal record or, contrary to a common belief, a “blacklist”. Income-contingent student loans are not normally reported either.

Why your score differs between agencies

Each agency uses its own scale and its own formula, and not every lender reports to all three. If your credit card company reports to Experian and Equifax but not TransUnion, a missed payment on that card will show at two agencies and not the third. A score that looks excellent at one agency and merely fair at another is normal and is not, by itself, a sign that something is wrong.

What matters is consistency in the underlying details. If an account appears at one agency with a missed payment and at another without one, that is worth investigating.

What helps: electoral roll, payment history, utilisation

The things that help are mostly unglamorous.

Registering to vote at your current address lets lenders confirm who you are and where you live, and it is one of the quickest wins for anyone who has moved recently. Paying every bill on time, every month, is the single biggest factor in most scoring models, because a long record of on-time payments is exactly what a lender wants to see.

Utilisation is the share of your available credit that you are actually using. Someone with a £2,000 card limit who regularly carries a £1,800 balance looks more stretched than someone who carries £300, even if both pay on time. A common rule of thumb is to keep balances below about 30% of your limits, and paying the card off in full each month is better still. Older accounts help too, so think twice before closing your oldest card.

What hurts: missed payments, defaults, CCJs and many applications

A single late payment can show on your file, and a pattern of them does far more damage. If an account falls far enough behind, the lender may register a default, which stays on your report for six years from the date of default even after you pay the debt.

County court judgments follow a similar rule. According to GOV.UK, records of judgments are kept for six years unless you pay the full amount within a month. Bankruptcies and individual voluntary arrangements also stay on your file for years.

Applications matter too. When you apply for credit, the lender usually runs a hard search, which other lenders can see. A handful of applications in a short period can suggest you are under financial pressure. Eligibility checkers that use a soft search let you see your chances first without leaving a visible mark.

Building credit from nothing

A thin file can be as much of a problem as a bad one, because lenders have nothing to judge you on. That often affects young adults, people who have recently moved to the UK, and anyone who has always paid for everything in cash. Our article on how millions of British women once found themselves without a financial history shows how long the effects of an empty file can last.

Practical first steps:

Register to vote at your current address.
Make sure a current account and your mobile phone contract are in your own name.
Consider a credit builder card, use it for one small regular purchase, and clear it in full by direct debit every month.
Check whether your rent payments can be added to your credit file; some agencies accept rent data through approved services.
Leave six months or more between applications while the history builds.

Improving a damaged credit file

If your file already has problems, time and consistency are the main cure. Older negative entries carry less weight as newer, positive history builds up on top of them, and defaults and judgments drop off entirely after six years.

In the meantime, bring any accounts that are behind up to date if you can, and talk to the lender before a missed payment becomes a default. If debts are unmanageable, free debt advice charities can help you agree an affordable plan. Our piece on why the advice your parents gave you can quietly hold back your credit score covers some of the habits that do more harm than people expect.

Myths: checking your own score, partners, student loans

Checking your own credit score or report does not harm it. It is recorded as a soft search, which lenders cannot see.

Living with someone, or being married to them, does not link your credit files. A financial association is only created when you take out joint credit, such as a joint loan, mortgage or current account with an overdraft. If that relationship ends, you can ask the agencies to separate your files.

Income-contingent student loans are not normally reported to the credit reference agencies. They can still affect a mortgage application, because the repayments reduce your take-home pay, but they do not sit on your report like a credit card. We explain how student loan balances really work in a separate guide.

Earning more does not raise your score directly either, because your salary is not on your credit report. It only matters to the lender that asks you about it.

Correcting errors on your report

Mistakes do happen: an account you never opened, a payment wrongly marked as late, or someone else’s details mixed with yours. Start by raising it with the agency that shows the error, which will usually check it with the lender that supplied the information. The ICO points out that the problem often lies with the original lender, so contact them as well. While a dispute is under way, you can add a short notice of correction to your file to explain your side.

If the agency and the lender will not fix an obvious inaccuracy, you can complain to the Information Commissioner’s Office about the handling of your data. Disputes about whether a lender treated you fairly go to the Financial Ombudsman Service instead.

Checklist: a 90-day credit health plan

Days 1 to 7: get your free report from all three agencies and check every account, address and name.
Days 1 to 7: register to vote at your current address if you have not already.
Days 8 to 30: dispute any errors with the agency and the lender, and keep copies of everything.
Days 8 to 30: set up direct debits for at least the minimum payment on every card and loan.
Days 31 to 60: bring card balances down towards 30% of their limits, starting with the card closest to its limit.
Days 31 to 90: avoid new credit applications unless you need them, and use eligibility checkers first.
Day 90: check all three reports again and note what has changed.

FAQ

What is a good credit score in the UK?

There is no single answer, because each agency uses a different scale. Treat the score as a guide to the direction you are heading in, and focus on the report behind it.

How long does it take to improve a credit score?

Some changes, such as joining the electoral register or correcting an error, can show within weeks. Building a strong payment history takes months, and serious problems such as defaults stay on your file for six years.

Does paying off a default remove it?

No. The default stays on your report for six years from the date it was registered, but it will be marked as satisfied once you pay it, which looks better to lenders than an unpaid default.

Can I get credit with a bad credit score?

Often yes, but usually at higher interest rates or with lower limits. Use eligibility checkers before applying, and be wary of any lender that promises approval regardless of your history.

Is it worth paying for a credit report subscription?

Not usually. You are entitled to your statutory credit report free of charge from each agency, and all three offer free ways to view your file online.