Most credit score myths come from misunderstanding what is on your credit file. Your salary, savings, partner (unless you share credit) and student loan are not on it; your borrowing, repayment history, defaults, court judgments, financial links and electoral roll status are. Lenders mainly judge that file plus what you tell them on the application, not a single number.
This guide takes ten common beliefs and checks them against how UK credit files actually work. For a general explainer, see how credit scores work in the UK, and for quick wins, how to improve your credit score.
First, what a credit file actually contains
The UK has three main credit reference agencies: Experian, Equifax and TransUnion. Each keeps its own file on you, built from data that lenders and others choose to share, so the three files are rarely identical. A typical file holds:
| On your file | Not on your file |
|---|---|
| Credit cards, loans, mortgages, overdrafts | Your salary or income |
| Monthly payment history (up to 6 years) | Savings and investments |
| Defaults, CCJs, IVAs, bankruptcies | Student loans repaid via payroll |
| Hard searches by lenders | Your partner, unless you share credit |
| Financial associations (joint accounts) | Benefits, medical or criminal records |
| Electoral roll and address history | Soft searches (visible only to you) |
You have a legal right to see your file. Each agency offers free access, either directly or through partners such as ClearScore (Equifax), Credit Karma (TransUnion) and MoneySavingExpert's Credit Club (Experian).
Myths 1 to 3: scores and checking
Myth 1: lenders see the same score you do. They do not. The score in your app is the agency's estimate. Lenders pull your file and run it through their own scoring, combined with your application details and their own records if you already bank with them. The agencies also use different scales: Equifax runs from 0 to 1,000, Experian moved from 0 to 999 to a 0 to 1,250 scale in late 2025, and TransUnion is moving from 0 to 710 to 0 to 999 in phases between September 2026 and June 2027. A "good" score on one tells you little about another.
Myth 2: checking your own score lowers it. Checking your own file is a soft search. Only you can see it and it has no effect on lending decisions. The same applies to eligibility checkers that tell you your chances of approval before you apply.
Myth 3: being turned down damages your score. The rejection itself is not recorded. What is recorded is the hard search made when you applied, which lenders can typically see for 12 months. One hard search is minor; several in a short period can look like you are scrambling for credit. Use eligibility checkers first and space out applications.
Myths 4 and 5: income and savings
Myth 4: a high salary means a high score. Your income is not on your credit file. Lenders ask for it on the application and may verify it with payslips, bank statements or current account data, because it matters for affordability. But a high earner who misses payments will have a weaker file than a modest earner who always pays on time.
Myth 5: having savings improves your score. Savings accounts are not credit, so they are not reported. Savings help in other ways: they stop you relying on credit when something goes wrong, and a deposit matters for a mortgage. Building an emergency fund is one of the best ways to protect your file indirectly.
Myths 6 and 7: partners, family and your address
Myth 6: moving in with or marrying someone links your credit. Living together or marrying creates no link. You become financially associated only when you take out joint credit, such as a joint bank account, joint loan or joint mortgage. Once linked, lenders may look at that person's file when you apply. If the joint product has closed and you have separated financially, you can ask each agency to add a notice of disassociation.
Myth 7: a previous occupant's debts affect you. Files are linked to people, not addresses. Debt letters for someone who used to live at your address will not harm your file, though you should return them marked "not known at this address". What does matter is keeping your own address history accurate and being on the electoral roll where you live. Our guide to the electoral roll and your credit score explains why.
Myths 8 and 9: student loans, rent and buy now pay later
Myth 8: student loans wreck your credit file. Student loans from the Student Loans Company that are repaid through PAYE or Self Assessment are not reported to credit reference agencies. Mortgage lenders will still ask about them, because the monthly deduction reduces what you can afford. The student loan calculator shows what you repay at your salary.
Myth 9: rent and buy now pay later never show up. Both can now. Some landlords, letting agents and rent apps share rental payments with the agencies, and Experian's newer scoring takes on-time rent into account. Buy now pay later became regulated by the FCA from 15 July 2026, which means providers must check affordability, and some report repayments to credit reference agencies. Treat a BNPL plan like any other credit: missed payments can be recorded.
Myth 10: old debts and old cards
Myth 10a: debts disappear after six years. Account records, including defaults and CCJs, drop off your credit file six years after the default or judgment date. That does not mean the debt is gone. A creditor may still be able to chase it, unless it has become statute-barred (generally six years without payment or acknowledgement in England, Wales and Northern Ireland, and five years in Scotland). Get free advice before paying or acknowledging an old debt.
Myth 10b: closing old cards always helps. Closing a card you do not use can make sense if you are tempted to spend on it, but it can also raise your credit utilisation (the share of your available limits you are using) and shorten your history. If the card has no annual fee and you are in control, keeping it open with a small regular purchase cleared by direct debit can do more good than harm. Never borrowing at all is not ideal either: a thin file gives lenders little to go on.
What actually improves your file
Strip away the myths and the levers are simple:
- Pay every bill and credit agreement on time; set up direct debits for at least the minimum.
- Keep credit card balances well below their limits, and clear them in full if you can. Our credit card payoff calculator shows how long a balance will take to clear.
- Register to vote at your current address and keep your details consistent across accounts.
- Check all three files a couple of times a year and dispute errors directly with the agency.
- Space out applications and use eligibility checkers first.
- Tackle existing debt in a plan. The debt payoff calculator compares the avalanche and snowball approaches.
Frequently asked questions
Does checking my credit score lower it in the UK?
Does my partner's bad credit affect my credit score?
Is my salary on my credit report?
Do defaults really disappear after 6 years?
Why is my credit score different on Experian, Equifax and TransUnion?
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