Before the Lender Looks: A Six-Point Credit File MOT for 2026 Buyers

Most mortgage conversations start with the rate. That is natural: a fraction of a percent feels tangible, and comparison sites make it easy to fixate on the headline number. But before a lender gets as far as pricing your deal, it looks at the person behind the application. In 2026, with affordability still tight and lenders scrutinising files closely, a wrong address or a stale default can do more damage than failing to shave 0.1% off the rate.

Think of your credit file as the lender's first impression. You cannot rewrite history, but you can make sure the story is accurate. Here are six practical fixes to tackle in the months before you apply.

1. Pull all three reports, not just the free one

The UK has three main credit reference agencies: Experian, Equifax and TransUnion. Lenders do not all use the same one, and a free app may only show you a snapshot from one agency. Request the statutory report from each. It costs a couple of pounds per agency, or you can use free trial routes and score services, but make sure you are seeing the full report rather than a simplified score.

Look for accounts you do not recognise, addresses you have never lived at and searches you did not authorise. If something is wrong, dispute it with the agency and, where relevant, the lender. Keep a dated record of what you sent and when.

2. Correct addresses and financial associations

Lenders care about stability, and your address history is part of that. Make sure your current address is listed correctly and that old addresses are marked as previous rather than current. A missing link between your old and new address can make it look as though you have gaps in your history.

Financial associations matter too. If you have ever held a joint account, mortgage or loan with someone, the agencies may link your files. If that relationship has ended, ask for a notice of disassociation. It will not erase shared history, but it stops a former partner's current problems from following you around.

3. Get on the electoral roll at your current address

This is one of the simplest fixes and one of the most commonly missed. Registering to vote at your current address helps lenders confirm who you are and where you live. If you have recently moved, update your registration rather than waiting for a polling card to arrive. It can take a few weeks for the credit agencies to catch up, so do it early.

If you cannot register to vote, perhaps because of your nationality or circumstances, you can add a notice of correction explaining your situation. It is not a magic fix, but it gives a human context to an otherwise confusing file.

4. Deal with defaults and settled accounts carefully

A default stays on your file for six years, even after you pay it. What changes is the status: it should show as satisfied or settled once the balance is cleared. Check that the date and amount are accurate. If a default was recorded incorrectly, challenge it. If it was correct, paying it does not remove it, but it may improve how a lender views the outstanding risk.

A notice of correction is useful if there were exceptional circumstances, such as illness or a payment error. Keep it short, factual and supported by evidence. Lenders are not obliged to agree with it, but they must read it when assessing your application.

5. Leave old accounts alone

It is tempting to close old credit cards and loans to tidy things up. Resist that urge before a mortgage application. Closing an old card can reduce your available credit and shorten your visible credit history. A long-standing account with a low balance and a clean payment record can help your file more than an empty one.

That does not mean opening new credit either. Avoid new cards, car finance or buy-now-pay-later agreements in the months before applying. Each application can leave a hard search, and lenders may see recent activity as a sign of squeezed finances.

6. Time your checks and avoid unnecessary applications

Start your clean-up at least three to six months before you plan to apply. Use eligibility checkers, which usually leave a soft search, rather than firing off full applications to see what happens. If you find an error, allow time for it to be corrected before a lender reviews your file.

A broker can help if your situation is complicated, but you do not need one to do the basics. The point is not to chase a perfect score. It is to make sure the file a lender sees is an accurate version of you. Lenders price the person as well as the property, and small file errors can cost more than shopping around for a marginally lower rate.