Why Does My Credit Score Vary Between Agencies?

If you have ever checked your credit score with two different services and seen two different numbers, you are not alone. Experian might show 720, Equifax 610, and TransUnion something else entirely. It can be confusing and even a little unsettling, especially if one number looks healthy and another does not. The good news is that a difference in scores across agencies is completely normal. Here is why it happens, what it means, and what you should do about it.

Why do credit scores differ between agencies?

There is no single universal credit score in the UK. Each of the three main credit reference agencies - Experian, Equifax, and TransUnion - calculates your score differently. They each use their own proprietary scoring models, their own score ranges, and their own interpretation of what counts as a risk indicator. Experian scores range from 0 to 999. Equifax scores run from 0 to 1,000. TransUnion (formerly Callcredit) uses a scale of 0 to 710. With different ceilings, different weightings, and different data, it would be more surprising if your scores did match perfectly.

These agencies are regulated by the Information Commissioner's Office (ICO) under data protection law, but they operate independently from one another. They compete for business from lenders, and part of that competition is developing scoring systems that each lender believes give the most useful picture of risk. There is no single "correct" score, and no industry-wide standard that forces them to align.

Not all lenders report to all three agencies

A key reason your scores diverge is that not every lender reports your account information to every credit reference agency. Some lenders report to all three, but many report to only one or two. If you have a credit card with a provider that only reports to Experian and Equifax, TransUnion will not see that account at all. Similarly, a mobile phone contract reported only to TransUnion will not appear on your Experian or Equifax report. Because each agency is building its picture of you from a slightly different set of data, the scores they produce can differ considerably.

This also means one agency might show a default or missed payment that another does not. It is not that one is wrong - it is that the record was never sent to all three. That is why checking your report across all three agencies is important if you want a complete picture of your credit report.

Different score ranges - what the numbers actually mean

Because each agency uses a different maximum, a raw score number from one agency cannot be directly compared to a raw number from another. A 610 from Equifax is not the same as a 610 from Experian. What matters is the band that your score falls into. All three agencies group scores into broad categories - typically "poor," "fair," "good," and "excellent" - and lenders are generally more interested in which band you are in than the exact number. Here is a rough guide:

• Experian (0-999): 0-560 poor, 561-720 fair, 721-880 good, 881-999 excellent.
• Equifax (0-1000): 0-438 poor, 439-530 fair, 531-670 good, 671-1000 excellent.
• TransUnion (0-710): 0-565 poor, 566-603 fair, 604-627 good, 628-710 excellent.

If your Experian score lands in "excellent" but your Equifax score lands in "good," that is a normal scenario driven by different data sets and different band boundaries. It does not mean one agency has made a mistake - it reflects the reality that no two pictures of your creditworthiness are identical.

Historical data and update timing

Lenders do not report to the credit reference agencies in real time. Most report on a monthly cycle, and different lenders submit their data on different dates. If one agency has received a recent update from your current account provider while another is still showing last month's balance, the scores will differ temporarily. Similarly, if you have recently opened a new account, closed an old one, or registered on the electoral roll, these changes will filter through to each agency at different speeds.

What should you do if your scores vary?

First, do not panic. Variation is expected and is rarely a sign that something is wrong. That said, there are practical steps you can take:

• Check your report, not just your score. Your statutory credit report shows the underlying data that the score is built from. Look for any errors, missing accounts, or out-of-date information that might be dragging one agency's score down relative to the others.
• Make sure all your accounts are reported everywhere. If you notice that a long-standing credit account only appears on one or two reports, ask the lender whether they report to all three agencies. Some lenders can be asked to share your data more broadly, which helps ensure a more consistent picture.
• Dispute genuine errors. If you find a genuine mistake - a default that has been satisfied but is still showing as outstanding, or an account that is not yours - you have a right to challenge it. Each agency has a formal dispute process, and lenders are obliged to investigate.
• Focus on the band, not the number. Lenders do not see a single universal score when you apply for credit. Each lender does its own affordability and risk assessment, often pulling data from one or two agencies alongside its own internal scoring. A five-point difference between agencies is irrelevant in practice - what matters is that you are in the right general band for the type of credit you are seeking.

At Mini Money, we work with a panel of FCA-authorised lenders who are open to a range of credit profiles. As a credit broker rather than a lender, our quick eligibility check does not leave a mark on your credit file, and it can give you a clearer sense of what borrowing options may be available - whatever your score says at any given agency.