What is a credit card APR?

APR makes it easier to compare

APRs allow you to compare different credit cards more easily. That’s because the APR for every credit card on the market is calculated the same way, using the same credit limits and amounts of spending. APRs are all based on a credit limit of £1,200. On top of that, they always assume you spend the full £1,200 on the first day and then pay it back in equal, regular instalments over a year without any further spending. Finally, APRs don’t consider any other interest you may be incurring on your card.

That way, you can compare different APRs and know they’re measured the same way. This could help to make finding the right card much easier – particularly given the wide range of credit cards to choose from, and the different ways fees and interest rates are advertised.

For example, let’s say your credit card has an interest rate of 20%. If you borrow £1,000 in January and don’t repay it until the end of the year, the cost of borrowing would be 20% of £1,000, or £200. In reality, the actual cost could be higher because of compound interest (interest charged on interest) and other charges and fees.

This is just an example to make APR easier to understand – remember that you should make regular repayments throughout the year to manage your balance. Paying your balance off each month will affect the amount of interest you pay over the year.

What’s included in a credit card’s APR?

A credit card’s APR (annual percentage rate) is the total cost of its interest rate (e.g. 20%) plus the fees every cardholder pays as standard, such as the annual fee – it’s the cost of borrowing money over a year. All other fees and charges, such as for missed repayments and cash withdrawals are excluded from the APR.

What the APR calculation is based on

The APR is based on the interest you'll pay if you carry your balance, as well as any standard fees such as annual fees that apply to your account. It doesn't include non-standard fees and charges (e.g. missed repayments or cash withdrawals).

APRs can be very helpful for comparing the cost of different credit cards, because they give you a good idea of how much different credit cards will cost compared to one another. That’s because the APR for all credit cards are calculated the same way. They’re based on the same amount of spending and consider the same kinds of fees. That way, you can use the APRs of different cards to compare what each card would cost the most. So the higher the APR, the more you’ll pay.

It’s worth knowing that when credit card providers give an APR for one of their cards, it’s based on an assumed credit limit. So when you see a representative example for any credit card, the APR is always based on how much it could cost if you borrowed £1,200 in a year. So the representative example and APR help you compare different products. Just remember that you might not be offered the same limit when applying, since that will be based on your financial history.

The APR is also based on the type of interest rate that applies to the way most people use the card. This is usually the Standard Purchase Rate, because most people use credit cards to make purchases. If you use the card in other ways, such as to transfer money or make cash withdrawals, different rates to the advertised APR could apply.

Representative vs. personal APR

The APR you’re offered is decided by the credit card company when you apply and is based on your credit rating, how good you are at managing your money, and the amount you want to borrow. After applying for a credit card, you could find that your personal APR is higher, lower or the same as the representative APR.

Although they’re unlikely to ever come up in a pub quiz, here are a few other facts about APR worth knowing:

• Credit cards with 0% interest periods still have APRs. Cards with an initial interest-free promotion (such as with some balance transfers) will have an APR that kicks in after a certain amount of time. Therefore, it’s best to pay off the full balance before the APR starts being applied.
• APR is calculated on an annual basis, but it’s added to your bill once per month. APR isn’t like an annual fee that is charged once a year. The interest is added to your outstanding balance when you get your monthly credit card bill. Of course, if you repay your balance in full on time, there’s no interest to pay.
• Most credit cards’ APRs are variable. This means the interest rate could change depending on the Bank of England Base Rate, or how you use the card, e.g. if you don’t make monthly payments on time, your APR could go up. To see how a change in the Base Rate or to your balance could affect your monthly repayments, check out the Barclaycard Interest Calculator.

Choosing a credit card with the right APR for you

Understanding the different APRs

Until now, the APR we’ve been talking about is the purchase APR – the amount of interest you pay on purchases.

But depending on the type of card you have, there may be other interest charges and APRs to consider:

• Introductory APR - This is for a special introductory rate that may be offered to customers when they first apply for a credit card. These can range from 0% introductory rates for purchases, balance transfers or both. It’s important to remember that once the intro period ends, so does the intro APR.
• Balance transfer APR - this is the annual interest rate charged when you move a balance from your existing card to this new one. Some cards offer an intro 0% balance transfer APR for a set period of time. But beware that rates will jump once that period is over. So we strongly recommend repaying the balance transfer before the introductory rate expires.
• Penalty APR - this may be applied to your credit card if you regularly spend beyond your credit limit or make a late payment.

There’s more to the picture than APR

Understanding APR is important – but there are other things to keep in mind.

If you don’t pay off your outstanding balance every month, charges and fees associated can increase the cost of borrowing. That’s because you’ll have to pay interest on the interest – which is called ‘compound interest’. This compounding effect isn’t included in the APR, and could make the cost of borrowing higher than you might think.

Check your eligibility before applying

Finding out your personal APR is a bit like shaking a Magic 8-ball. You don’t know what rate you’ll be offered until you apply for a credit card, and because applying can be recorded in your credit history, it’s worth reading the eligibility requirements for the card before applying. You can also use our eligibility checker, which can give you an idea of whether you’re likely to be accepted. This type of ‘soft search’ isn’t recorded in your credit history and therefore won’t affect your credit rating.

Consider moving your balance to a card with 0% interest

If you already have a credit card with an APR that’s adding interest to your bill each month, you could consider moving the balance to a new card with a 0% interest promotional period.

Taking interest out of the picture for a while can make clearing the balance easier, as long as you’re confident you can pay it all off before the 0% interest period is over and APR kicks in again. You can see how much transferring a balance could save you by using our balance transfer calculator. Be sure to check if there are any transfer fees involved when you look at balance transfer card.

How a 0% interest period could make a difference to your interest payments

Here’s how the APR on a credit card could make a difference to how much you pay while clearing an outstanding balance, compared to the saving you could make if you transferred it to a card with a 0% interest period.

Imagine you have an outstanding balance of £1,200 on a credit card with 19.9% APR. If you kept the balance on that card and repaid £100 per month, it could take 1 year 2 months to clear it and cost £135 in interest payments. 

As a comparison, if the balance of £1,200 was moved to a balance transfer card with a 30-month interest-free period and a 0.5% transfer fee, and you repaid £100 each month, the balance could be cleared in 12 months, with no interest and £6 in fees.

What's next?

APR can sometimes seem like a tricky maths problem based on confusing percentages, rates and balances. Actually, it’s just about understanding the basics of interest and fees. 

Now you know all the important bits, you can start comparing credit cards on a like-for-like basis.