Your credit score is a number calculated by credit reference agencies such as Experian, Equifax and TransUnion. It summarises your financial track record — including how reliably you have repaid debts, whether you have missed payments, and how much credit you currently use. Lenders check your credit score as part of their mortgage application assessment.
Each credit reference agency uses a different scoring scale, so your number will vary between them. Experian scores range from 0 to 999, Equifax from 0 to 1,000, and TransUnion from 0 to 710. A higher score generally indicates lower risk to a lender.
While your credit score gives a useful indication of your standing, mortgage lenders actually look at the full credit report behind the score. They examine individual accounts, payment patterns and any adverse markers such as defaults or CCJs. Two applicants with the same score could receive different mortgage offers depending on the detail in their reports.
You can improve your credit score over time by making payments on schedule, keeping credit utilisation low, registering on the electoral roll and avoiding unnecessary credit applications.
Sarah checks her Experian credit score before applying for a mortgage and sees it is 890 out of 999, which Experian classes as "Good". She notices an old mobile phone contract showing a missed payment from three years ago. Because she has kept all other accounts up to date, her broker advises that most high-street lenders would still consider her application.
Key Points
- Each UK credit reference agency (Experian, Equifax, TransUnion) uses a different scoring scale
- Mortgage lenders review your full credit report, not just the headline score
- Registering on the electoral roll, reducing outstanding balances and avoiding multiple credit applications can all improve your score
- You can check your statutory credit report for free once a year, or use free services such as ClearScore and Credit Karma
