CoverMapWhat “improving your credit score” really means
The number in your credit app is a guide, not what lenders use. Experian says lenders “calculate their own score for you when you apply”, using credit reference agency data, your application and their own records. So the real aim is a cleaner, fuller credit report. The score usually follows.
Each agency has its own scale and bands – our guide to how credit scores work in the UK explains them. Experian moved to a 0–1,250 scale from November 2025 and TransUnion is moving to 0–999 between September 2026 and June 2027. If your number jumped or dropped recently, the new scale may be the reason, not anything you did. TransUnion says lender decisions aren’t affected by its switch.
Step 1: Check all three credit reports for free
Experian, Equifax and TransUnion each hold their own file on you, so an error or a missing account may show on one and not the others. You can see all three without paying, according to MoneySavingExpert:
- Experian: the free Experian account gives your full report and score; Experian says the score is updated every 30 days.
- Equifax: ClearScore shows your Equifax score and report free every month.
- TransUnion: MSE Credit Club uses TransUnion data.
You also have a legal right to a free statutory report from any agency, says the ICO, though TransUnion notes it doesn’t include a score. Checking your own file is a soft search. MoneyHelper says you can check “as often as you like, and it won’t affect your score.”
Step 2: Register on the electoral roll
Experian says electoral roll data “helps lenders confirm your name and address”, and that your score “will increase as a result”. It normally appears on your report within 30 days. If you register during the annual canvass (August to November), it shows by 1 December. Register at your permanent address. Experian says lenders don’t like lots of different addresses over short periods. If you aren’t eligible to vote, you can add a note to your report explaining why.
Step 3: Fix mistakes on your report
Look for accounts you don’t recognise, wrong addresses, or payments shown as late that you made on time. Then:
- Raise a dispute with the agency that shows the error, or with the lender that supplied the data, says the ICO.
- Wait for the lender to respond. Equifax says the lender has 21 days, and a note is added to your file showing the information is under dispute.
- Escalate to the ICO if an agency won’t correct information you believe is wrong.
Disputes are for wrong information. Accurate entries stay, even if they’re negative.
Add a notice of correction
If an entry is accurate but needs context – say, missed payments while you were ill or out of work – you can add a notice of correction. Experian says it must be no longer than 200 words, and lenders “should take it into account”. It won’t raise your score, and it may slow down decisions because a lender has to read it.
Step 4: Cut financial links to an ex
A financial association links your file to someone else’s, so their record can be considered when you apply. Experian says associations are created by a joint bank account, a joint credit application or a joint CCJ. They are not created by marriage, a civil partnership, living together or sharing a surname.
Once joint accounts are closed, the ICO says you can write to the agencies to ask for a disassociation. MoneySavingExpert suggests doing it with all three. Experian asks for proof the link has ended. With a shared mortgage, removal may still be possible if you’ve lived apart for more than six months and other joint finances are closed.
Step 5: Keep your credit utilisation low
Credit utilisation is how much of your available credit you’re using. Experian’s advice is to “try to keep your credit utilisation below 25%”. On a card with a £2,000 limit, that means keeping the balance under £500. ClearScore says paying off cards can improve your score because utilisation falls.
Lenders also look at the bigger picture. MoneySavingExpert says they consider your debt ratio – non-mortgage debt compared with income. Under 20% is excellent and over 60% is a problem.
Step 6: Pay on time, every time
Payment history is one of the main factors Experian lists. A direct debit for at least the minimum payment on each card and loan means a forgotten due date doesn’t turn into a missed payment. Card issuers such as HSBC and Barclaycard charge a £12 late fee. MoneySavingExpert adds that missing a minimum payment can cost you a 0% deal.
This now covers buy now, pay later too. MoneySavingExpert says late or missed BNPL payments appear on credit reports as of July 2026. ClearScore says Klarna reports to Experian and TransUnion, and Zilch to all three agencies. Experian’s newer score also takes in overdraft use and credit card cash withdrawals.
Step 7: Space out applications and use eligibility checkers
Every full application leaves a hard search that other lenders can see. Experian says most stay on your report for 12 months; Zable says TransUnion keeps them for 2 years. Zable also says several applications close together have a bigger effect than one.
Eligibility checkers use a soft search instead. HSBC says this “will not affect your credit score”, and MoneyHelper names ClearScore, Experian and MoneySavingExpert as places to check. Some card issuers, such as Capital One, say the APR shown after an eligibility check is the APR you’ll get.
Step 8: Get your rent counted
Experian’s 0–1,250 score includes rent payments that are reported to it. Rent that isn’t reported won’t affect your score either way. Through Experian’s Rental Exchange, which is free for tenants and landlords, partners need six months of payment history before they report. Payments then appear within 8 weeks. If your landlord doesn’t take part, Experian says you can report rent yourself through apps such as CreditLadder, Canopy, Emma, Wollit and UpliftMoney.
Step 9: Consider a credit builder card (with care)
If you have little or no credit history, or a damaged one, a credit builder card can help you show on-time repayments. Which? says these cards come with “fairly low” starting limits and a “high APR”. Issuer pages checked October 2026 show:
| Card | Representative APR | Credit limit | Eligibility check |
|---|---|---|---|
| Aqua | 39.9% variable | £250–£1,500 starting | No score impact |
| Vanquis Credit Builder | 37.9% variable | £250–£2,500 | Soft search |
| Capital One Classic | 34.9% variable | £200–£4,000 starting | Soft search |
| Zable | 29.9% variable | Up to £4,000 | Soft search |
Source: Aqua, Vanquis, Capital One and Zable websites, checked October 2026. Rates can change.
The trade-off is cost: these cards carry high representative APRs, so they work best if you clear the balance in full each month. The approach these cards are designed for is small, regular spending you clear in full each month. Capital One says you get up to 56 days interest-free on new spending when you repay the balance in full. Our best UK credit cards guide compares other card types.
Myths: what won’t improve your score
- “Checking my score lowers it.” No. It’s a soft search that lenders can’t use.
- “I’m on a blacklist.” Equifax says there’s “no such thing as a credit blacklist”, and the ICO agrees. Each lender makes its own decision.
- “Paying off a default wipes it.” Experian says a default stays for six years from the date of default whether you pay it or not. Paying it marks it “satisfied”.
- “Closing old cards boosts my score.” Experian says closing accounts reduces your available credit and lowers the average age of your accounts, and both can lower your score.
- “My partner’s bad credit is on my file.” Not because you’re married or live together. Only joint finances create a link.
- “A high salary or savings will help.” MoneySavingExpert says salary and savings accounts aren’t on your credit report.
How long negative marks last
| Item | How long it stays | Source |
|---|---|---|
| Missed or late payments | Up to six years | MoneyHelper |
| Default | Six years from the date of default, paid or not | Experian |
| County Court Judgment (CCJ) | Six years; can be removed if paid in full within one month | GOV.UK |
| Hard searches | 12 months (Experian) to 2 years (TransUnion, per Zable) | Experian, Zable |
| Financial association | Until you ask the agencies to remove it | Experian, ICO |
Source: MoneyHelper, Experian, GOV.UK, Zable, ICO. Checked October 2026.
How long does it take to improve your credit score?
Nobody can promise a fast fix, but some timescales are known. The electoral roll shows within 30 days (or by 1 December during the canvass). A lender has 21 days to respond to an Equifax dispute. Reported rent appears within 8 weeks. The free Experian score updates every 30 days, so you won’t see changes daily. Hard searches fall away after 12 months to 2 years, and negative marks after six years. In between, each month of on-time payments and low balances adds to your record.
If you’re missing payments because your debts are too high, free help is available from MoneyHelper and StepChange. Our debt consolidation guide explains the options and their risks.
Frequently Asked Questions
How can I improve my credit score fast?
There's no instant fix. The quickest steps are joining the electoral roll (usually shows within 30 days on Experian), correcting errors on your reports and paying down card balances. Negative marks like missed payments can stay for up to six years.
How do I fix my credit score if there's a mistake?
Raise a dispute with the credit reference agency or the lender that supplied the data. Equifax says the lender has 21 days to respond. If an agency won't correct wrong information, you can complain to the ICO.
How do I build credit in the UK with no history?
Register on the electoral roll, get your rent reported (for example through Experian's Rental Exchange) and consider a credit builder card that you clear in full each month. These cards have low limits and high APRs.
Does paying off a default remove it?
No. Experian says a default stays for six years from the date of default whether you pay it or not, though paying it marks it as satisfied. A CCJ paid in full within one month can be removed.
Does closing old credit cards help my score?
Not usually. Experian says closing accounts reduces your available credit and lowers the average age of your accounts, which can lower your score.
What credit utilisation should I aim for?
Experian suggests keeping it below 25% of your total credit limits.
Sources
- Experian – What is a credit score?
- Experian – Electoral roll, financial association, notice of correction, utilisation, rent and defaults guides
- Experian – Does debt consolidation hurt your credit score?
- ICO – Credit
- Equifax – Statutory credit report
- Equifax – Credit blacklists
- MoneySavingExpert – Check your credit report free (Jun 2026)
- MoneySavingExpert – Credit scores explained (Aug 2026)
- MoneyHelper – How to check your credit report
- GOV.UK – CCJs and your credit rating
- Zable – Does applying for a credit card affect your credit score?
- ClearScore – Does BNPL affect your credit score? (Aug 2026)
- Which? – Best cashback and reward credit cards (1 Oct 2026)
- Capital One – Classic credit card
- Vanquis – Credit cards