Few numbers influence your everyday finances as quietly, or as powerfully, as your credit rating. It is the reason a mortgage application is waved through or declined, the reason one borrower is offered a competitive rate while another is quoted double digits, and even the reason a mobile phone contract is approved in minutes or rejected outright. Most people only think about their score once it starts working against them, so it is worth understanding what sits behind the number well before you need it.
What Is a Credit Rating?
A credit rating — often called a credit score — is a number that tells lenders how likely you are to repay borrowed money. It is built from your financial history and is used by banks, building societies, credit card companies and other lenders to decide not only whether to lend to you, but at what interest rate. A useful way to think about it is as a financial report card: the higher your score, the more likely lenders are to see you as low risk, and the better the deals, rates and choice that come with that.
The Three Credit Reference Agencies
In the UK, three main companies hold the credit information that drives your score: Experian, Equifax and TransUnion. Each produces its own score from the data it holds, and, crucially, your three scores are rarely identical. Each agency can hold slightly different information about you, and a lender may check one, two or all three before making a decision.
| Agency | Score range | ”Good” threshold | Notes |
|---|---|---|---|
| Experian | 0–999 | 721 or above | The largest credit reference agency in the UK; used by most major lenders |
| Equifax | 0–1,000 | 670 or above | One of the oldest credit reference agencies globally; used by many banks and credit card providers |
| TransUnion | 0–710 | 604 or above | Previously known as Callcredit; used by some lenders, particularly for car finance |
The thresholds above are the ones each agency publishes, but do not treat them as universal constants. Lenders respond to the underlying data rather than a headline number, so what matters most is the direction your score moves over time.
What Shapes Your Score
Credit reference agencies weigh several factors, and while the exact weighting varies between them, the broad picture is consistent. Payment history is by far the largest single element, typically accounting for around 35%. Lenders want to see a track record of paying bills on time: late payments stay on your file for six years, a single missed payment can drop your score noticeably, and even paying a day or two late can be recorded against you.
Credit utilisation — the percentage of your available credit that you are actually using — is the next biggest factor at roughly 30%. If you have a £10,000 credit limit and have used £3,000, your utilisation is 30%. Experts broadly recommend keeping it below that level, and below 10% is better still.
The length of your credit history contributes around 15%. The longer your record of responsible borrowing, the easier lenders find it to assess you, which is why closing old accounts can backfire by shortening your history. New credit applications make up about 10%: every application leaves a “hard search” on your file, hard searches stay for two years, and too many applications in a short period can lower your score by 50–100 points. Finally, your credit mix counts for roughly 10%. Managing a credit card, a mortgage and a car loan responsibly is viewed favourably, though this factor has a relatively small impact.
Factors That Sit Outside the Formula
Several other details never feature in the headline score but do shape lender decisions. Being on the electoral roll at your current address adds credibility and is one of the quickest wins available. County Court Judgments (CCJs) are severe negative marks that stay on your file for six years, as do bankruptcy and Individual Voluntary Arrangements. And financial associations matter: if you share a joint account or mortgage with someone whose credit is poor, their history can count against you.
How to Check Your Score for Free
You have a legal right to see your credit report, and in the UK checking it costs nothing. Experian offers a free account showing your score and report — its Premium service, at £14.99/month, adds extra features — at experian.co.uk. ClearScore gives you your Equifax score and full report, plus tips to improve, completely free, at clearscore.com. Credit Karma does the same for your TransUnion score at creditkarma.co.uk, also free. And MSE Credit Club at mse.com/creditclub shows you your Experian report and score alongside credit match tools.
Because each of these services uses a different agency, checking more than one gives you the fullest picture — and since lenders may check any of the three, it is worth seeing yourself as they see you.
How to Improve Your Credit Score
Improving a credit score is not instant, but consistent good habits make a real difference over time. The most effective habit is also the dullest: pay every bill on time. Setting up direct debits for credit cards, loan repayments and household bills removes the risk of a one-day-late slip, which can still be recorded.
Keep utilisation low by clearing credit card balances in full wherever possible, and if you cannot pay in full, pay more than the minimum. Requesting a higher credit limit can improve your utilisation ratio, but only if you resist spending the extra headroom.
Space your credit applications out, ideally by at least three months, and use eligibility checkers before applying for a card or loan. These run a “soft search” that leaves no visible mark on your file, while a real application leaves a hard search. Joining the electoral roll at gov.uk/register-to-vote takes about five minutes, is free, and is one of the quickest ways to boost your score because it helps lenders verify who you are and where you live.
Keep old accounts open even if you no longer use them — the longer your history, the better — unless they carry high fees or tempt you to overspend. If you are new to the UK or to credit and have a “thin” file, a credit-builder card can help. These have low limits and higher interest rates, but used for small purchases and cleared in full each month, they build the track record lenders want to see.
Finally, read your report rather than just glancing at the score. Common errors include accounts that do not belong to you, incorrect addresses or personal details, debts that have been settled but still show as outstanding, and fraudulent accounts opened in your name. If you find a mistake, contact the credit reference agency to dispute it — it must investigate within 28 days.
Credit Score Myths Worth Ignoring
A handful of misconceptions about credit scores keep circulating, and they are worth dismissing one by one. Checking your own score does not affect it — it is a soft search, and you can check as often as you like. Closing old accounts does not automatically help; it can shorten your credit history and raise your utilisation ratio, which can actually lower your score. You do not have one single score — each of the three agencies calculates its own, and lenders may use any of them or a combination.
Being refused credit does not ruin your score: the refusal itself is invisible, although the hard search that came with the application stays on your file for two years and can influence future applications. Paying off a debt does not remove it either — settled debts stay on your file for six years from the date they were registered, though a settled account looks far better than an outstanding one. And your salary does not feature in your credit report at all; lenders may ask about it when you apply, but it sits outside the score.
How Long Negative Marks Stay on Your File
| Negative Mark | How Long It Stays |
|---|---|
| Missed payments | 6 years |
| County Court Judgments | 6 years |
| Bankruptcy | 6 years |
| Individual Voluntary Arrangements | 6 years |
| Hard credit searches | 2 years |
| Debt relief orders | 6 years |
After six years, most negative marks are removed from your file automatically.
The Steady Route to a Better Score
For most people, improving a credit rating is not about clever tricks but about patience and consistency. Check your report for free, correct anything that is wrong, and keep the fundamentals steady: pay on time, use a modest slice of your available credit, and avoid frantic bursts of applications. Lenders reward dull reliability, and over a year or two that reliability reliably shows up in your score.