Using a Credit Card to Improve Your Credit Score: How to Do It Right
Published 22nd of September 2016·Updated 6 April 2026
Reviewed by: Reviewed for accuracy April 2026
Using a credit card correctly is one of the most reliable ways to build your credit score in the UK. Credit reference agencies including Experian, Equifax and TransUnion all reward consistent, responsible borrowing. A credit card lets you borrow and repay repeatedly, creating a positive payment history that shows lenders you can manage credit well.
Short Summary
To build your credit score with a credit card, use it for small purchases and pay the balance in full every month. Never carry a balance from month to month if you can avoid it.
Keep your credit utilisation below 30 per cent of your available limit. If your limit is £1,000, try not to let your balance exceed £300 at any point during the month.
Missing even one payment can damage your score significantly. Set up a direct debit for at least the minimum payment so you never accidentally miss a due date.
If you have a poor credit history, a credit-builder card from providers such as Capital One, Aqua or Vanquin may be your most accessible starting point. These cards have lower limits and higher APRs, but used correctly they serve the same purpose.
Why does using a credit card improve your credit score?
Credit reference agencies reward evidence of responsible borrowing. When you use a credit card, make your payments on time and keep your balance low, each of those actions adds a positive data point to your credit file. Over months and years, this builds a pattern that lenders see as reliable.
By contrast, if you have no credit card and have never taken out any credit, lenders have no evidence that you can manage borrowing. A thin credit file can be just as problematic as a bad one when you apply for a mortgage or personal loan.
What is credit utilisation and why does it matter?
Credit utilisation is the percentage of your available credit limit that you are using at any given time. Experian recommends keeping this below 25 per cent for the best effect on your score. TransUnion and Equifax use similar thresholds.
| Available credit limit | 25% utilisation threshold | 30% utilisation threshold |
|---|---|---|
| £500 | £125 | £150 |
| £1,000 | £250 | £300 |
| £2,000 | £500 | £600 |
| £5,000 | £1,250 | £1,500 |
High utilisation signals financial pressure to lenders, even if you pay your balance in full each month. Check your statement date and try to make a payment a few days before it closes if your balance is running high.
How to use a credit card without paying interest
Most UK credit cards offer a 0% interest period on purchases, typically 30 to 56 days. If you pay your full balance by the due date each month, you never pay any interest at all.
Set up a direct debit for the full balance, not just the minimum payment. If your budget is tight and you cannot always clear the full balance, pay off as much as possible and treat the remainder as a priority the following month. Do not let a balance build up, as interest charges will quickly erode any credit-building benefit.
What mistakes damage your credit score when using a credit card?
Three behaviours cause the most damage:
Going over your credit limit: Even exceeding it by £1 triggers a negative marker on your credit file and may result in a penalty charge. Most card providers send a warning before this happens, but the safest approach is to monitor your balance regularly.
Missing or making late payments: Payment history is the single biggest factor in your credit score. A missed payment can remain on your credit file for six years. Your direct debit must cover at least the minimum payment; if it is cancelled or your bank account is overdrawn on the due date, the missed payment will be registered.
Applying for multiple cards at once: Each full credit application leaves a hard search on your credit file. Multiple hard searches in a short period suggest financial difficulty to lenders. Use an eligibility checker (which leaves only a soft search) before applying.
Which credit card is best for building credit?
If your credit score is low, mainstream cards from Barclays, Halifax or HSBC may not be accessible to you. Credit-builder cards are designed specifically for people rebuilding their credit history:
| Card | Representative APR | Starting credit limit |
|---|---|---|
| Capital One Classic | 34.9% | £200-£1,500 |
| Aqua Classic | 34.9% | Up to £1,200 |
| Vanquis Bank | 39.9% | £150-£1,000 |
| Marbles | 34.9% | £250-£1,200 |
The high APR on these cards is irrelevant if you pay your balance in full each month. The card's purpose is to build your credit history, not to finance spending. Treat it like a debit card and you will not pay interest.
Frequently Asked Questions
How quickly can a credit card improve my credit score?
You may see a positive movement in your score within 3 to 6 months of consistent, on-time payments. Significant improvement to a poor score typically takes 12 to 24 months. The key factors are consistency and avoiding mistakes like missed payments or high utilisation.
Should I pay my credit card weekly or monthly?
Paying weekly keeps your balance low throughout the month, which can help your credit utilisation appear lower when your statement closes. However, monthly payment in full achieves the same result and is simpler to manage. Either approach works well.
Can I use a credit card to improve my score if I have a CCJ?
A County Court Judgement (CCJ) makes it harder to obtain any credit card. Credit-builder cards are your most realistic option. If your CCJ is less than 6 years old, it will appear on your credit file; however, demonstrating responsible behaviour from the point of registering the CCJ can still improve your score over time.
Will having multiple credit cards improve my score faster?
Not necessarily. One well-managed card is enough to build a positive credit history. Applying for multiple cards in a short period creates multiple hard searches, which can temporarily reduce your score. Focus on using one card responsibly before considering additional credit.
What credit utilisation percentage is best for my credit score?
Experian recommends keeping utilisation below 25 per cent for the best effect on your score. Below 10 per cent is ideal. Above 50 per cent starts to signal risk to lenders even if you pay on time.
Should I cancel my credit card once my score improves?
Only if you have a good reason. Closing a credit card account removes that credit limit from your total available credit, which increases your utilisation ratio on any remaining cards. In many cases, keeping the account open but unused is better for your credit score than closing it.