A detailed guide to Experian, Equifax, and TransUnion UK — how they collect data, calculate scores, and how to manage your credit file.
The United Kingdom's credit reporting landscape is shaped by three major credit reference agencies (CRAs) — Experian, Equifax, and TransUnion — each of which maintains independent credit files on UK consumers and businesses. Understanding how these agencies operate is essential for managing personal and business credit effectively.
Experian is the UK's largest credit reference agency, maintaining credit files on virtually every UK adult with a financial history. Experian's credit score ranges from 0 to 999, with scores categorised as Very Poor (0-560), Poor (561-720), Fair (721-880), Good (881-960), and Excellent (961-999). Experian provides free credit scores through its CreditExpert service and the free Experian app. It also offers paid identity monitoring and credit improvement tools.
Equifax UK uses a credit score range of 0 to 700, with scores above 420 considered "good." Equifax collects data from a slightly different set of lenders than Experian, meaning scores can differ between the two agencies. Equifax provides free credit scores through its website and through the ClearScore app, which uses Equifax data to provide free credit monitoring to millions of UK consumers.
ClearScore, which uses Equifax data, has become one of the UK's most popular credit monitoring services with over 20 million users. Its free model — funded by financial product recommendations — has made credit monitoring accessible to a much wider audience than was previously the case, contributing to improved financial literacy across the UK.
TransUnion UK (formerly Callcredit) uses a score range of 0 to 710, with scores above 566 considered "good." TransUnion data is used by Credit Karma UK and several other free credit monitoring services. TransUnion is particularly strong in the telecommunications and utilities sectors, collecting data from mobile phone providers and energy companies that may not report to the other agencies.
UK CRAs collect: personal identification information (name, date of birth, addresses); financial account information (credit cards, loans, mortgages, overdrafts); payment history (on-time payments and missed payments); public records (County Court Judgments, insolvency records); electoral roll registration; and credit search records (hard and soft searches). Negative information is typically retained for six years from the date of the event.
UK consumers have strong rights regarding their credit files under the Consumer Credit Act, the Data Protection Act 2018, and GDPR. These include: the right to access your credit file (free under GDPR); the right to dispute inaccurate information; the right to add a Notice of Correction explaining exceptional circumstances; and the right to be forgotten for certain types of data. The Information Commissioner's Office (ICO) oversees compliance with data protection requirements.
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