Credit scores: what really moves the number
Payment history, utilisation and time. The handful of factors that matter, the myths that don’t, and how long changes take.
Priya Nair & Marcus Bell2 min read
A credit score is a lender's shorthand for "how likely is this person to repay?" Each credit reference agency calculates its own, but they look at broadly the same things.
What matters most
- Payment history. Paying on time, every time, is the single biggest factor. Set up direct debits for at least the minimum payment.
- Credit utilisation. Using a small share of your available credit — ideally under 30% — signals you are not stretched.
- Length of history. Older accounts help. Think twice before closing your oldest card.
- Recent applications. Several hard searches in a short period can lower your score temporarily.
- Being on the electoral roll (in the UK) helps lenders confirm your identity and address.
Myths and facts
Does checking my own score hurt it?
No. Checking your own report is a "soft search" and is not visible to lenders.
Does my income affect my score?
Not directly. Income is not on your credit report, though lenders will ask for it separately.
Should I carry a balance to build credit?
No. Paying in full each month builds the same history without paying interest.
How long do late payments stay on my file?
Typically six years in the UK, though their impact fades over time.
How long changes take
Lower utilisation can show up within a month or two, once lenders report new balances. Rebuilding after missed payments takes longer — usually a year or more of on-time payments before the effect is noticeably smaller.
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