How to Compare Credit Cards in the UK: A Step-by-Step Guide

Comparing credit cards effectively means identifying what you need the card for first, then matching that need to the right card type, and only then looking at the specific figures. A 0% balance transfer card and a cashback card are built for completely different purposes, and choosing the wrong type will cost you money regardless of the deal attached to it.

What should you decide before comparing credit cards?

Before looking at any deals, answer these two questions:

1. Why do you want the card and what will you primarily use it for?
2. Will you clear the full balance every month or are you likely to carry a balance?

Your answers determine which card type to compare. Applying for the wrong type and then carrying a balance on a cashback card, for instance, means paying up to 30% APR interest while earning 1% back. That is a poor trade.

What figures matter most when comparing credit cards?

When you look at a comparison table, the headline figures to focus on are:

Representative APR. This is the annual interest rate applied to unpaid balances after any introductory period ends. A lower APR matters only if you expect to carry a balance. The FCA requires that 51% of approved applicants receive the advertised representative APR; yours could be higher.

Introductory period length. For 0% purchase and 0% balance transfer cards, the length of the interest-free window is the most important number. A 24-month 0% period gives you twice as long to clear the debt as a 12-month deal, even if the revert APR is slightly higher.

Balance transfer fee. Most 0% balance transfer cards charge 1% to 3% of the amount transferred as a one-off fee. A card with a 0% fee and a shorter promotional period may save less overall than one with a 3% fee and a longer period, depending on your balance size.

Annual or monthly fees. Premium cashback and travel cards sometimes charge a fee. Check whether the rewards you expect to earn exceed the cost of the fee before applying.

How do you use comparison websites effectively?

Comparison sites including MoneySuperMarket, Compare the Market and Which? display credit cards in best-buy tables ranked by promotional rate, cashback percentage or other criteria. These are a useful starting point but have two important limitations.

First, they typically show representative deals rather than personalised ones. The rate and limit you are actually offered may differ from what is advertised.

Second, not every card provider lists their products on every comparison site. It is worth checking the websites of major providers including Barclaycard, Halifax, MBNA and American Express directly, particularly for specialist products.

Use the eligibility checker tools available on most comparison sites before applying. These run a soft credit search that gives you an indication of your approval likelihood without leaving a hard mark on your file.

Should you apply for multiple credit cards at once?

No. Each full application triggers a hard credit search that is recorded on your file with Experian, Equifax and TransUnion. Multiple hard searches within a short period signal to lenders that you are seeking a lot of credit quickly, which increases the perceived risk and can lower your score.

Use eligibility checkers to narrow your shortlist to one or two cards, then apply for your first choice. If refused, wait at least three months before applying elsewhere and use the time to understand why you were turned down.

What else should you check before applying?

Beyond the headline rates, verify these details on the card provider's own website:

• Minimum monthly repayment: usually 1% to 2% of the outstanding balance or £25, whichever is higher
• Late payment fee: typically £12; more importantly, a missed payment is recorded on your credit file for six years
• Cash advance terms: most cards charge a fee and immediate interest on cash withdrawals; this applies even during a 0% purchase period
• Purchase protection: all FCA-regulated UK credit cards provide Section 75 protection on purchases between £100 and £30,000

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Frequently Asked Questions

What does representative APR mean on a credit card?

The representative APR is the interest rate that at least 51% of approved applicants receive. It is not a guaranteed rate. Depending on your credit score and circumstances, your actual APR could be higher. Always check whether you have been offered the advertised rate or a different one once you receive your credit agreement.

Is it safe to use comparison websites to find a credit card?

Yes, using a comparison site to browse and compare cards is safe and does not affect your credit score. The eligibility checker tools on these sites use soft searches. Only when you click through to the card provider and submit a full application does a hard search occur.

How long should a 0% balance transfer deal last?

As long as possible, given a manageable transfer fee. If you have £3,000 in credit card debt, a 29-month 0% deal with a 3% transfer fee costs £90 upfront but gives you 29 months to repay without interest. Divide your balance by the number of months in the deal to calculate your target monthly repayment to clear it in time.

Can I get a 0% credit card if I have a low credit score?

Probably not. The most competitive 0% deals are reserved for applicants with a good or excellent credit score. If your score is low, credit-builder cards from providers including Capital One and Aqua may be your best option. After 12 months of responsible use, your score should improve enough to apply for better products.

Does cancelling a credit card hurt my credit score?

It can. Closing a card reduces your total available credit, which increases your overall credit utilisation ratio. If you have a £5,000 balance across £10,000 of available credit (50% utilisation) and close a card with a £2,000 limit, your utilisation jumps to 63% of the remaining £8,000. Higher utilisation can lower your score with Experian, Equifax and TransUnion.