Your credit score plays a crucial role in determining whether a mortgage lender will approve your application and what interest rate you will be offered. In the UK, even small improvements to your credit profile can make a meaningful difference to your borrowing power. Ideally, you should start working on your credit health at least six to twelve months before applying for a mortgage.
Check Your Credit Reports with All Three Agencies
The UK has three main credit reference agencies: Experian, Equifax, and TransUnion. Each holds slightly different information, and different lenders check different agencies, so it is important to review all three. You can access your statutory credit report for free from each agency, and services like ClearScore (Equifax), Credit Karma (TransUnion), and Experian's free membership tier make this easy.
When reviewing your reports, look for errors such as incorrect addresses, accounts you do not recognise, or outdated information. If you find a mistake, raise a dispute directly with the credit reference agency. Correcting errors can produce a quick improvement in your score. Also check for any financial associations with other people. If you had a joint account with an ex-partner who has poor credit, their financial behaviour could be affecting your score. You can request a financial disassociation if the joint account has been closed.
Practical Steps to Boost Your Score
Register on the electoral roll. This is one of the simplest and most effective things you can do. Being registered at your current address helps lenders verify your identity and confirms your stability. If you are not registered, visit the gov.uk website or contact your local council to get on the electoral roll.
Pay all bills on time. Late or missed payments leave a mark on your credit file for six years. Set up direct debits for at least the minimum payment on all credit commitments to ensure you never miss a due date. Even a single missed payment can significantly damage your score.
Reduce your credit utilisation. Lenders look at how much of your available credit you are using. If you have a credit card with a 5,000-pound limit and a 4,500-pound balance, your utilisation is 90%, which looks risky to lenders. Aim to keep utilisation below 30% across all your credit accounts. Paying down balances is one of the fastest ways to improve your score.
Avoid applying for new credit. Each credit application leaves a hard search on your file, and multiple applications in a short period suggest financial stress. In the six months before your mortgage application, avoid taking out new credit cards, personal loans, car finance, or even phone contracts on credit. If you need to compare mortgage deals, use eligibility checkers that perform soft searches instead of full applications.
Common Mistakes to Avoid
Many people unknowingly harm their credit score through everyday habits. Closing old credit accounts can actually reduce your score by lowering your total available credit and shortening your credit history. If you have an old credit card you rarely use, consider keeping it open and making a small purchase occasionally rather than cancelling it.
Using payday loans or high-cost credit can be a red flag for mortgage lenders, even if you repaid them on time. Some lenders will decline applicants who have used payday loans within the past three to six years, so avoid them entirely if you are planning to buy a home.
Withdrawing cash on a credit card is treated differently from purchases and can signal financial difficulty to lenders. It also incurs immediate interest charges and fees, so it is best avoided altogether.
Finally, be cautious about Buy Now Pay Later (BNPL) services such as Klarna and Clearpay. While these have not traditionally appeared on credit files, this is changing, and some mortgage lenders now ask about BNPL commitments during the application process. Frequent use of BNPL can raise concerns about your spending habits.
Building a strong credit profile takes time, but the effort pays off when it comes to securing the best possible mortgage deal. Start early, be consistent with payments, and monitor your reports regularly to track your progress.