There's no single "UK credit score"
Unlike some countries, the UK has no single official credit score. Instead, three main credit reference agencies (CRAs) — Experian, Equifax and TransUnion — each hold their own file on you, built from data reported by lenders, and each calculates its own score on its own scale. A lender might only check one or two of the three, and different lenders weigh the same information differently, which is why your "score" can look different depending on where you check it, and why being rejected by one lender doesn't necessarily mean another will reject you too.
| Agency | Typical score range | Free way to check |
|---|---|---|
| Experian | 0–999 | Experian's free plan |
| Equifax | 0–1000 | Via ClearScore or Equifax directly |
| TransUnion | 0–710 | Via Credit Karma UK or TransUnion directly |
Because the scales don't match, comparing a "750 from Equifax" to a "710 from TransUnion" tells you nothing directly — what matters is where you sit relative to that agency's own bands (poor, fair, good, excellent), and, more importantly, the underlying information in your file that any lender will actually look at.
What actually goes into your file
- Payment history: whether you've paid credit agreements, utility bills and phone contracts on time.
- Credit utilisation: how much of your available credit (especially on credit cards) you're using — using a high proportion consistently can count against you even if you always pay in full.
- Length of credit history: older, well-managed accounts generally help.
- Electoral roll registration: being registered to vote at your current address helps lenders verify your identity, which affects scoring.
- Recent applications: a cluster of credit applications in a short period can look like financial distress, even if each application alone was harmless.
- Public financial records: County Court Judgments, bankruptcies, IVAs and similar generally stay on file for six years and weigh heavily.
Checking your own score is always safe
Checking your own credit report or score — sometimes called a "soft search" — never affects your score, no matter how often you do it. Only "hard searches," which happen when you actually apply for credit and give a lender permission to check, can have a small, temporary impact, and only a genuine application shows up as one.
Why lenders see something different again
Beyond your CRA file, most lenders apply their own risk models and internal criteria on top of the raw credit data — which is why two people with similar-looking files can get different decisions from the same lender, and why the "score" a comparison site shows you is an estimate of your general creditworthiness rather than a guaranteed prediction of any specific lender's decision.
Key takeaways
- You have three separate credit files, not one — Experian, Equifax and TransUnion.
- The scores use different scales, so a number alone isn't comparable between agencies.
- Checking your own report never damages your score; only genuine credit applications create a hard search.
- Payment history, credit utilisation and electoral roll registration are among the most influential factors you can actually control.