What Is APR on a Credit Card UK? Representative APR Explained Simply

Chandraketu Tripathi

Finance Editor, Kaeltripton

Published 5 Apr 2026

Last reviewed 4 May 2026

✓ Fact-checked

By Chandraketu Tripathi | Updated April 2026

APR — Annual Percentage Rate — is the standard measure of the true annual cost of borrowing on a credit card or loan. It includes both the interest rate and any mandatory fees, expressed as a single annual percentage. Understanding APR helps you compare credit cards, loans and mortgages on a like-for-like basis. Here is everything you need to know.

Key facts April 2026

APR definition: Annual Percentage Rate — total annual cost of borrowing including interest and fees | Representative APR: rate offered to at least 51% of successful applicants | Average credit card APR UK: ~30% APR (April 2026) | Regulated by: FCA under Consumer Credit Act

APR vs Interest Rate: What Is the Difference?

Term	What it is	Example	When to use it
Interest rate (purchase rate)	The annual percentage charged purely on the balance outstanding	24% per year = 2% per month	Rarely useful alone; doesn’t include fees
APR (Annual Percentage Rate)	The true annual cost including interest AND mandatory fees	24.9% APR includes £30 annual fee impact on a typical balance	Always use APR to compare products
EAR (Effective Annual Rate)	Used for overdrafts; similar to APR but for fluctuating balances	39.9% EAR (most UK bank overdrafts since FCA cap)	Used for overdraft comparison only
Monthly interest rate	The daily or monthly equivalent of the annual rate	24% APR ÷ 12 = 2% per month	Used to calculate interest on a statement

What Is Representative APR?

UK credit card providers are required by FCA rules to advertise a “representative APR”. This is defined as:

The APR that at least 51% of successful applicants actually receive
It is NOT the APR everyone gets — up to 49% of approved applicants may receive a higher rate
The rate you personally receive depends on your credit score, income and circumstances
A card advertised at “Representative 24.9% APR” means at least half of approved customers get 24.9% — others may get 29.9% or 39.9%

Typical Credit Card APRs UK 2026

Card type	Typical APR range	Notes
0% purchase card (during 0% period)	0% for the promotional period, then 19–29% after	Only 0% for a limited time; revert rate applies after
Cashback and reward cards	29.9–42.9% APR	High rate; designed to be cleared monthly; rewards offset the rate
Standard credit cards	19.9–29.9% APR	Mid-range; widely held by typical credit users
Balance transfer cards (after 0%)	19.9–24.9% APR	Rate applies after 0% period ends to any remaining balance
Credit builder / bad credit cards	34.9–59.9% APR	Higher rate reflects higher risk; must be cleared monthly
Store cards	29.9–39.9% APR	Often high; avoid for general spending

How to Calculate the Monthly Interest on a Credit Card

If you carry a balance, here is how the interest is calculated:

1. Take your APR: e.g. 24.9%
2. Divide by 365 to get a daily rate: 24.9 ÷ 365 = 0.0682% per day
3. Multiply by the number of days in the billing period (typically 30–31)
4. Apply that to your average daily balance
Example: £1,000 balance at 24.9% APR for 30 days = £1,000 x 0.068% x 30 = £20.40 in interest for one month
Example: £5,000 balance at 39.9% APR for 30 days = £5,000 x 0.109% x 30 = £164 in interest for one month — £1,968/year

When APR Does Not Matter

APR is only relevant if you carry a balance. If you clear your credit card in full every month, you pay zero interest regardless of the APR. This is why:

Cashback and reward cards have high APRs — providers know most users intend to clear the balance
The APR of a 0% balance transfer card is irrelevant during the 0% period
For credit builder card users clearing monthly, the 34.9–59.9% APR is academic — they never pay it

The most important credit card rule: Clear your full balance every month and APR is irrelevant. Carry a balance and even a modest APR compounds into a significant annual cost very quickly.

Key facts April 2026

APR is the true annual cost of borrowing on a credit card, including interest and mandatory fees. Representative APR means at least 51% of approved applicants get that rate. Average UK credit card APR is around 30% in 2026. APR only matters if you carry a balance — clear the full balance monthly and the APR is irrelevant. Always compare products by APR, not by quoted monthly interest rate.

Frequently Asked Questions

What does APR mean on a credit card?

APR stands for Annual Percentage Rate. It is the true annual cost of borrowing on a credit card, expressed as a percentage, including the interest rate and any mandatory annual fees. It allows you to compare credit products on a like-for-like basis.

What is a good APR for a credit card UK?

For standard credit cards, 19.9–24.9% APR is considered low. Most mainstream cards are 24.9–29.9% APR. Credit builder cards range from 34.9–59.9% APR. However, if you clear the balance monthly, APR is irrelevant — you pay no interest.

What is the difference between APR and interest rate?

The interest rate is purely the rate charged on the outstanding balance. APR includes both the interest rate and any mandatory annual fees, expressed as a single annual figure. APR is always the correct figure to use when comparing credit products.

Related Guides

Sources: FCA Consumer Credit Act, FCA representative APR rules, UK Finance credit card statistics Q1 2026, CMA credit card market study. April 2026.