You can boost your credit score for getting a mortgage by registering on the electoral roll, reducing your credit utilisation below 30%, correcting errors on your credit report, and building a consistent payment history.
Most improvements take three to six months to show results, so start early. This guide explains what UK lenders look for and how to fix common problems.
Your credit score can be the single biggest barrier between you and your next home. According to Which? research, one in six UK mortgage holders have experienced at least one rejection before being approved, and even when approval is given, a lower score often means higher interest rates and fewer lender options.
The good news is that you can do something about it.
With some targeted changes to how you manage your money, you can raise your score and widen the pool of lenders willing to offer you a mortgage.
How Do Credit Scores Work in the UK?
The UK has three main credit reference agencies, and each one uses a different scoring system. This can cause confusion, because a “good” score with one agency might look “fair” with another.
The Three Agencies and Their Scores
Experian recently updated its scale from 0-999 to 0-1,250. Equifax now scores from 0 to 1,000, and TransUnion uses a range of 0 to 710.
Because the scales differ, comparing scores across agencies is a bit like comparing distances in miles and kilometres. The number itself matters less than where you sit within each agency’s bands.
What counts more is the detail behind the number.
Your credit report contains your payment history, outstanding debts, how long you have had credit, and any public records such as County Court Judgements (CCJs) or Individual Voluntary Arrangements (IVAs). Mortgage lenders look at all of this, not just the score.
What Lenders Actually Look At
Each mortgage lender has their own internal scoring system. They take the data from your credit report and apply their own rules to decide whether to lend to you.
“There’s no universal ‘good’ score for mortgages,” explains Sean Horton from Respect Mortgages. “Each lender sets their own acceptance thresholds based on their appetite for risk. Some focus on helping borrowers with lower scores, while others only work with those who have spotless credit records.”
This is why one lender might turn you down while another says yes. It is not about hitting a single magic number. It is about matching your profile to a lender whose rules fit your situation.
How Does Your Credit Score Affect Your Mortgage?
Your score does more than determine a simple yes or no. It shapes your entire mortgage experience.
Fewer Choices and Higher Costs
If your credit status rules you out with certain lenders, the number of deals available to you shrinks. With fewer options, you may end up paying more in interest over the life of the mortgage.
On a £500,000 mortgage over 25 years, a difference of just 0.5% in interest rate adds roughly £40,000 to the total amount repaid.
Lenders also look at your employment status, minimum income requirements, and the size of your deposit alongside your credit profile. A stronger score gives you access to the widest range of products and the most competitive rates.
What Are the Quickest Ways to Improve Your Credit Score?
If you are planning to apply for a mortgage within the next three to six months, these actions can make a measurable difference to your score.
Register on the Electoral Roll
Being on the electoral roll helps lenders confirm your identity and address, and it can add points to your credit score.
You can check your registration status and sign up at gov.uk/register-to-vote. It only takes a few minutes, and industry sources suggest it could add anywhere from 20 to 50 points, depending on your existing credit profile.
Check Your Credit Reports for Errors
Even small mistakes can drag your score down.
A wrong address, an old account still showing as open, or a payment incorrectly recorded as late can all cause problems. Download your report from all three agencies and go through each one carefully. If you spot anything wrong, contact the agency to get it corrected.
Most errors are resolved within 28 days.
Reduce Your Credit Utilisation
Credit utilisation is the percentage of your available credit that you are using.
Lenders pay close attention to this figure. Aim to keep your usage below 30% on each card and across all your credit accounts combined. If your credit card limit is £1,000, try to keep your balance below £300.
Paying down existing balances before your mortgage application is one of the most effective things you can do.
Space Out Your Credit Applications
Every time you apply for credit, the lender runs a “hard search” on your file.
This leaves a mark that other lenders can see, and too many searches in a short period suggests you might be struggling financially. Avoid applying for any new credit in the six months before your mortgage application.
Set Up Direct Debits for All Bills
A single late payment can stay on your credit file for up to six years. Setting up direct debits for your regular bills removes the risk of forgetting a payment. This covers utilities, phone contracts, council tax, and any existing credit commitments.
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How Do You Build a Credit History From Scratch?
If you are new to credit or have a thin credit file, you will need to show lenders that you can borrow responsibly.
Bills in Your Name
Utility contracts, broadband, and mobile phone plans are all forms of credit when paid monthly.
Having these accounts in your name and paying them on time every month builds a track record that lenders value. Rent payments can now count too, with services like CreditLadder and Experian Boost reporting them to the credit agencies on your behalf.
Use a Credit Card Wisely
A common mistake is thinking that avoiding all debt will give you a perfect score. Lenders actually want to see evidence that you can use and manage credit well.
Using a credit card for small, everyday purchases and paying the balance in full each month shows exactly that. You build a strong payment history without paying any interest.
Consider a Credit Builder Card
If your credit history is limited or patchy, a credit builder card can help. These cards have lower limits and higher interest rates, but they are easier to qualify for.
Use one for a small regular purchase, set up a direct debit to clear the balance in full, and over a few months you will see your score improve.
Managing Credit Cards to Strengthen Your Profile
Credit cards can work for you or against you when it comes to your credit profile. Used with care, they are one of the best ways to build a positive credit record.
Keep Old Accounts Open
Closing an unused credit card might seem tidy, but it can actually hurt your score. It reduces your total available credit, which pushes up your utilisation ratio, and it shortens your credit history if it is an older account.
“I advise clients to keep old credit accounts open but use them occasionally for small purchases,” says Sean Horton. “Just buying petrol once a month and setting up a direct debit to pay the balance keeps the account active while contributing positively to your credit history.”
Pay More Than the Minimum
Paying only the minimum amount each month suggests to lenders that you may be under financial pressure. Clearing your balance in full shows you are in control of your finances. That is exactly what mortgage lenders want to see.
Read more: What is Your Credit Utilisation Ratio?
How Long Do Negative Marks Stay on Your Credit Report?
Negative marks on your credit report do not have to be permanent barriers. Understanding how they work can help you plan your recovery.
How Long Do They Last?
In the UK, most negative information stays on your file for six years. This includes late payments, defaults, CCJs, IVAs, and bankruptcy.
The effect of these marks fades over time, especially if you show good credit behaviour afterwards. A missed payment from five years ago carries far less weight than one from last month.
Settling Outstanding Debts
If you have defaults or CCJs, check whether you can settle them. A “satisfied” default or CCJ looks better to lenders than an “unsatisfied” one. Both remain on your file for six years from the original date, but the satisfied status tells lenders you have dealt with the issue.
Adding a Notice of Correction
If something specific caused your credit problems, such as illness, redundancy, or divorce, you can add a “notice of correction” to your file.
This is a short statement (up to 200 words) explaining the circumstances. It will not remove the negative marks, but some lenders take these explanations into account during manual underwriting.
Avoid Credit Repair Companies
Many credit repair firms charge high fees for services you can carry out yourself. Focus instead on building positive credit history, settling outstanding issues, and giving your file time to recover.
Related: Credit Score Gone Down? Here’s What You Need to Know
Checking for Fraud and Errors
Your credit report might contain mistakes or signs of fraud that are lowering your score without your knowledge. You should review all three reports at least once a year, and always in the three months before a mortgage application.
Common Errors to Look For
Accounts belonging to someone with a similar name, duplicate entries, closed accounts still showing as open, incorrect payment statuses, and outdated personal details are all more common than you might think.
Financial associations with former partners or housemates can also drag down your score if their credit record is poor.
What to Do if You Spot Something Wrong
Contact the credit reference agency straight away to report the problem and request a correction. If you suspect fraud, also report it to Action Fraud, the UK’s national fraud reporting centre.
Free monitoring services like ClearScore, Credit Karma, and Money Saving Expert’s Credit Club can help you keep tabs on your file between formal checks. For a more detailed view showing data from multiple agencies side by side, Checkmyfile offers a 30-day free trial.
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Can a Mortgage Broker Help if You Have Credit Problems?
Working with a mortgage broker can make a real difference, especially if your credit history is not perfect. Respect Mortgages can introduce you to an experienced, independent broker who has access to the full market.
Access to More Lenders
Brokers work with the entire mortgage market, including specialist lenders who do not deal directly with the public. These lenders often take a more flexible view of credit issues and may accept applications that high street banks would decline. Around a third of UK mortgage lenders only accept applications through brokers, so going direct to a bank means you are already limiting your options.
Matching You with the Right Lender
Every lender has different rules about what they will and will not accept. A good broker knows these differences inside out.
“Each lender has their own appetite for different types of risk,” explains Sean Horton. “A good broker knows these details and can match you with lenders most likely to accept your specific situation.”
A broker can also help present your application in the best way, explaining any past credit issues and providing context that supports your case.
Related:
Your Credit Improvement Timeline
Planning ahead gives your credit improvements time to take effect before you apply.
1 to 3 Months Before Applying
Check all three credit reports for errors and get them corrected. Register on the electoral roll if you are not already. Stop all new credit applications. Pay down credit card balances as far as you can, and make sure every bill is paid on time.
3 to 6 Months Before Applying
Continue reducing existing debts and use credit cards responsibly by paying balances in full. Update your address on all accounts. Add a notice of correction if needed, and keep older credit accounts open while closing any unnecessary store cards.
6 to 12 Months Before Applying
Build a consistent pattern of on-time payments and aim for a mix of credit types if your file is thin. Save regularly to show financial stability, work on clearing any remaining debts, and allow time for older negative marks to carry less weight.
About three months before you plan to apply, stop making any changes to your credit profile. Keep balances low, avoid new credit, and do not make any big financial moves.
What Lenders Want To See On Your Credit Report
Your credit report tells lenders a story about how you manage money. But what exactly are lenders looking for, and how can you make sure your report shows you in the best light
Next Steps
Start by downloading your credit reports from Experian, Equifax, and TransUnion. Go through each one and dispute any errors you find.
Build a credit improvement plan based on your own situation, focusing first on the issues having the biggest effect on your score. Check your electoral roll registration and update your address on all accounts.
If you have past credit issues or your financial situation is unusual, speaking with a mortgage broker can save you time and improve your chances. They can assess your position and point you towards lenders most likely to approve your application.
Respect Mortgages can introduce you to a trusted, whole-of-market broker at no cost to you.
Be realistic about timescales. Meaningful credit improvements take at least three to six months to show results. And remember that your credit score is just one part of the picture. While you work on your score, also focus on saving for a deposit, keeping your income stable and well documented, and paying down any outstanding debts.
Taking control of your credit now puts you in the strongest position when you are ready to apply.
Frequently Asked Questions
There’s no universal minimum score as each lender sets their own criteria. However, Experian scores above 700, Equifax scores above 420, and TransUnion scores above 575 generally increase your chances. Remember that lenders look beyond just the score number at your overall credit history.
Read more: What credit score is needed for a mortgage?
Credit reference agencies tend to update borrower profiles once a month.
Some improvements can show results within 30-60 days, such as registering on the electoral roll, fixing errors, or reducing credit utilisation. However, more significant improvements typically take 3-6 months of consistent positive credit behaviour, and serious issues like defaults take longer to overcome.
No, checking your own credit report creates a “soft search” that only you can see and has no impact on your score. You can check your credit reports as often as you like without affecting your mortgage application.
Yes, but it’s more challenging.
Some specialist lenders will consider applications with CCJs, particularly if they’re older (3+ years), have been satisfied (paid off), or were for small amounts. You’ll likely need a larger deposit and may pay higher interest rates.
Read more: Bad Credit Mortgages
If you’re applying jointly, yes. Lenders will consider both applicants’ credit histories, and the person with the lower score will typically have more influence on the decision. If you’re not financially linked (no joint accounts or previous joint applications), their credit won’t affect yours.
Related:
Credit utilisation (the percentage of your available credit that you’re using) significantly impacts your score.
Keeping utilisation below 30% on each card and across all your cards combined shows lenders you’re not overly reliant on credit. High utilisation, even if you pay off the balance monthly, can signal financial stress.
Read more: What is Your Credit Utilisation Ratio?
