A credit card is a surprisingly versatile piece of financial equipment, but only when used on purpose. Used deliberately, it can spread the cost of a large purchase, pay you back in cashback or points, clear existing debt without interest, or quietly rebuild a damaged credit record. Used carelessly, it is one of the most expensive ways to borrow money. UK issuers split their ranges into balance transfer, purchase, cashback, rewards, travel and credit-building cards, each built around a different kind of behaviour. This guide walks through each in turn.
Balance transfer cards
A balance transfer card does one specific job: moving existing credit card debt somewhere cheaper. You apply and transfer your current balance, usually within 60 to 90 days of opening the account. The new card then charges 0% interest for a set introductory period, so every pound you repay goes toward clearing the debt rather than paying interest — until a standard variable rate kicks in.
That interest-free window is not free. Nearly every balance transfer card charges a fee as a percentage of the amount you move. Recent deals include MBNA at 21 months with a 3.49% fee and 19.9% standard APR, Barclaycard at 18 months with a 3.5% fee (21.9% APR), Virgin Money at 16 months with a 3% fee (20.9% APR) and HSBC at 15 months with a 2.9% fee (21.9% APR). The fee eats directly into your saving: on a £5,000 transfer to MBNA’s deal, the 3.49% fee would be £175, so your effective saving depends on clearing the balance within 21 months.
Two rules keep a balance transfer honest. Clear the balance before the 0% period ends, or the standard APR — often 18% to 25% — applies to whatever remains, and avoid spending on the card unless it also offers 0% on purchases, since new spending will usually attract interest immediately. A balance transfer calculator helps confirm you can clear the debt within the window.
Purchase cards
Purchase cards work the same 0% trick in reverse: rather than moving existing debt, they offer 0% interest on new spending for a set period. They are ideal for planned expenses such as a new laptop, furniture or home improvements. Recent examples include Sainsbury’s Bank at 20 months (21.9% APR), Tesco Bank at 18 months (20.9% APR), Barclaycard at 15 months (21.9% APR) and Nationwide at 12 months (19.9% APR).
The discipline is the same as with balance transfers: only spend what you can afford to repay inside the interest-free period, and set up a direct debit so you never miss at least the minimum payment. One common mistake is using a purchase card to move an old balance — the 0% rate usually applies only to new purchases, so a transfer would sit on the standard APR from day one.
Cashback cards
A cashback card pays you a percentage of everything you spend. The recent headline is Chase, which has offered 1% cashback for the first 12 months with no annual fee and no cap. American Express Cashback Everyday pays up to 1% with no annual fee but uses tiered rates based on spending, while Barclaycard returns a lower 0.5% in exchange for acceptance almost everywhere. American Express Gold earns 1 Membership Rewards point per pound at a £160 annual fee, which arguably makes it a rewards card first.
The numbers add up more impressively than most people expect. Spend £2,000 a month on a 1% cashback card and you earn £240 in a year; over five years that is £1,200 from spending you would have done anyway. The one rule that keeps this working is paying the balance in full each month — interest charges quickly swallow any cashback. Some cards only start paying above a spending threshold, and American Express is not accepted everywhere in the UK, so read the terms and keep a Visa or Mastercard as a backup.
Rewards cards
Rewards cards swap cashback for points, miles or vouchers on every pound spent. They suit people who spend enough each month for the rewards to matter and who clear the balance in full. Recent examples include American Express Gold at 2 Membership Rewards points per pound with a £160 annual fee, HSBC Premier World Elite at 3 HSBC Rewards points per pound with a £195 annual fee, Barclaycard Avios Plus earning 1.5 Avios per pound for £12 a month, and NatWest Reward Black at 1 point per pound for £84 a year.
Before committing to an annual fee, do a simple calculation: a £160 card needs to return more than £160 a year to justify itself. Redeem points regularly, since they can expire or lose value, and rewards are meaningless if you are carrying a balance and paying 20%-plus interest.
Travel cards
A travel credit card removes the headline cost of using plastic abroad. Most UK credit cards charge a foreign transaction fee of around 2.99% on overseas spending, and a card with 0% foreign transaction fees simply eliminates that charge. Starling charges 0% and includes free ATM withdrawals up to £300 a month with no annual fee; Revolut charges 0% on the first £1,000 of spending a month and free ATMs up to £200 a month on its standard account; Halifax Clarity charges 0% with a low ATM fee and no annual fee; and Nationwide FlexPlus offers free worldwide ATM withdrawals for a £13 monthly fee. When abroad, always pay in the local currency — if a retailer offers to convert the charge to pounds, the exchange rate is usually far worse than your bank’s. Carrying two cards also helps if one is declined.
Credit-building cards
Credit-building cards exist for people with limited or damaged credit histories — they carry lower limits and higher rates, but used sensibly can be a ladder back into the mainstream. Recent examples: Capital One Classic at 19.9% APR with limits from £200 to £1,500 and gradual increases, Vanquis at 29.9% APR with limits from £100 to £1,000, Aqua Classic at 29.9% APR with limits from £250 to £1,500 alongside a free credit score tracker, and Barclaycard Forward at 21.9% APR with limits from £250 to £1,500.
The method is unglamorous but effective. Spend only a small amount each month — around 10% to 30% of your limit is a sensible range — and always pay the full balance on time, since a single missed payment damages your score. Avoid applying for several cards at once, as each application leaves a mark on your file. After 12 to 18 months of responsible use, you may qualify for cards with far better rates.
Understanding APR and the worked example
APR is the annual cost of a card expressed as a percentage, including both the interest rate and any mandatory fees. Every UK card has two: an introductory APR, a promotional rate often set at 0% for a limited time, and a standard APR that applies afterwards, typically somewhere between 18% and 30%. Clear the balance before the introductory period ends, or the standard rate takes hold.
A worked example shows the difference. Say you hold a £5,000 balance on a card charging 20% APR and transfer it to MBNA’s 0% card for 21 months with a 3.49% fee.
| Detail | Before | After |
|---|---|---|
| Balance | £5,000 | £5,000 |
| APR | 20% | 0% |
| Transfer fee | — | £175 (3.49%) |
| Interest over 21 months | £1,750 | £0 |
| Total cost | £6,750 | £5,175 |
| Net saving | — | £1,575 |
By transferring you save £1,575 in interest after the £175 fee — provided you clear the full £5,000 within 21 months. If not, the standard APR of 19.9% applies to what remains.
Practical habits worth keeping
A handful of habits protect you regardless of the card. Never use a credit card for a cash withdrawal: cash advances typically charge a fee of 3% to 5% plus interest from day one, with no interest-free period. Always make at least the minimum payment on time — a missed payment damages your credit score and usually incurs a late fee of around £12. Compare total cost, not just the 0% period, because a shorter deal with a lower transfer fee can work out cheaper. Use an eligibility checker before applying: its soft search does not affect your score and shows which cards you are likely to be accepted for. And keep your oldest card open — closing a long-standing account shortens your credit history and can lower your score.
Choosing a card is about being honest about how you will use it. Used for one clear purpose — clearing debt, funding a planned purchase, or earning from spending you would do anyway — a card is a genuinely useful tool. For impartial guidance before applying, the government-backed service at MoneyHelper is a good starting point, alongside reviews from Which? and comparison tools from MoneySavingExpert.