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5 Common Causes of a Decreased Credit Score

Your credit score affects almost every financial decision you make, from applying for a mortgage to getting a mobile phone contract. If your score has dropped recently, you are not alone. Millions of people across the UK see unexpected dips in their credit rating each year, and the reasons are not always obvious.

Understanding what causes your credit score to fall is the first step towards fixing it. In this guide, we look at five of the most common reasons your score might have decreased, and what you can do about each one.

What Is a Credit Score and How Is It Calculated?

A credit score is a number that represents how reliable you are as a borrower. In the UK, the three main credit reference agencies, Experian, Equifax, and TransUnion, each use their own scoring system. Experian scores range from 0 to 999, Equifax from 0 to 1,000, and TransUnion from 0 to 710.

These agencies collect data from banks, utility providers, mobile phone companies, and public records such as the electoral roll. They build a picture of your borrowing history, including how much credit you have, whether you pay on time, and how often you apply for new borrowing.

Lenders use this information to decide whether to offer you credit, and at what interest rate. A higher score generally means better deals and lower rates. A lower score can mean higher costs, or being turned down altogether.

You can check your credit report for free through services like MoneyHelper’s guide to checking your credit score. It is worth doing this regularly so you can spot problems early.

1. Using Too Much of Your Available Credit

Your credit utilisation ratio is the percentage of your total available credit that you are currently using. If you have a credit card with a £5,000 limit and you have spent £4,000 on it, your utilisation is 80%. That is high, and it sends a signal to lenders that you might be relying too heavily on borrowed money.

Most experts recommend keeping your utilisation below 30%. So on that £5,000 card, try to keep the balance under £1,500 where possible. If you regularly max out your cards, even if you pay them off each month, your score can still take a hit because the balance is often reported before your payment is processed.

On the other hand, using no credit at all can also work against you. Lenders want to see evidence that you can borrow responsibly. If your cards sit unused for months, there is no recent data to demonstrate good financial behaviour.

The key is balance. Use your credit regularly, keep balances low, and pay off as much as you can each month.

2. Missing or Late Payments

Your payment history is the single biggest factor in your credit score. Even one missed payment can leave a mark on your credit file for up to six years, and the impact is immediate. A payment that is 30 days late will trigger a default marker that lenders can see straight away.

If you have a high credit score, the drop from a missed payment can be especially sharp. Someone with a score of 900 might see a bigger numerical fall than someone already sitting at 500, because the models treat the missed payment as more unusual for someone with otherwise clean history.

Multiple missed payments are worse still. If you fall into arrears, where you owe several months of payments on an account, the damage to your score compounds over time. This can make it harder to access affordable credit when you need it most.

If you have missed a payment, the best thing you can do is get back on track as quickly as possible. Set up direct debits for at least the minimum payment on every account. If you are struggling to keep up with repayments, free debt advice is available from StepChange, who can help you work out a plan.

3. Paying Off a Loan or Closing an Account

This one catches people off guard. You would think that paying off a loan would be good for your score, and in the long run it often is. But in the short term, it can actually cause a dip.

Credit scoring models like to see a healthy mix of different credit types. If you have a mortgage, a credit card, and a personal loan, that diversity works in your favour. When you pay off the loan, you reduce that mix, and your score might drop slightly as a result.

Similarly, closing an old bank account or credit card can shorten the average age of your credit history. Older accounts show stability, so removing them can make your credit profile look younger and less established than it actually is.

Before closing old accounts, check whether they carry any annual fees. If an old credit card costs you nothing to keep open, it might be worth leaving it active, even if you rarely use it. Just make sure there are no forgotten balances ticking away in the background, as even a small unpaid amount can generate missed payment markers.

4. Applying for New Credit Too Often

Every time you apply for a credit card, loan, or other form of borrowing, the lender runs a hard search on your credit file. Each hard search is visible to other lenders and stays on your file for 12 months. One or two searches are not a problem, but several in a short space of time can make it look like you are desperate for credit, which is a red flag for lenders.

If you need to compare deals, look for lenders that offer eligibility checkers using soft searches first. A soft search lets you see whether you are likely to be accepted without leaving a mark on your credit file. Many comparison websites and lenders now offer this, so there is no reason to apply speculatively and risk multiple hard searches.

As a general rule, try to leave at least three to six months between credit applications. This gives your score time to recover from any recent searches and shows lenders that you are not applying everywhere at once.

5. Errors on Your Credit Report

Sometimes your credit score drops and you have done nothing wrong. Mistakes on credit reports are more common than you might think. An account that does not belong to you, a payment incorrectly marked as missed, or outdated address information can all drag your score down without you realising.

Under UK law, you have the right to dispute any inaccuracies on your credit report. The credit reference agency must investigate and correct any errors within 28 days. You can also add a \”notice of correction\” to your file, which is a short statement explaining any unusual circumstances, such as a period of illness that led to missed payments.

Check your report with all three agencies, as they do not always hold the same information. You can access your Experian report through their free service, your Equifax data through ClearScore, and your TransUnion report through Credit Karma. The gov.uk guidance on credit reference agencies explains your rights in more detail.

What to Do If Your Credit Score Keeps Falling

If you have checked all five of the causes above and your score is still dropping, it may be worth looking at the bigger picture. Persistent debt problems can create a cycle where missed payments and high utilisation feed off each other, making recovery harder over time.

There are formal debt solutions available in the UK that can help you regain control of your finances. A Debt Management Plan (DMP) lets you make reduced monthly payments to your creditors based on what you can afford. An Individual Voluntary Arrangement (IVA) is a legally binding agreement that can write off a portion of your unsecured debt after a set period, typically five or six years.

For smaller debts, a Debt Relief Order (DRO) may be an option if your total qualifying debts are under £50,000. The DRO application fee is now free, making it more accessible than ever. For larger debts where other options are not suitable, bankruptcy remains available, though the court fee of £680 still applies.

Each of these solutions will affect your credit score in different ways, and none of them should be entered into lightly. Free, impartial advice from organisations like StepChange or MoneyHelper can help you understand which option is right for your situation.

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