Quick answer
APR shows the annualised cost of borrowing. A higher APR normally means higher monthly repayments and more interest, but the final cost also depends on the amount borrowed, fees and the loan term.
The safest comparison is to look at three things together: APR, monthly payment and total amount repayable. A cheaper-looking monthly payment can still cost more if the term is longer or fees are higher.
Calculate borrowing cost first
Use the loan repayment calculator to compare monthly payment, total interest and total repayment at different APRs.
What APR actually means
APR stands for annual percentage rate. It is designed to express the yearly cost of credit, including interest and certain compulsory charges. That makes it easier to compare different borrowing options than looking at interest alone.
APR is useful, but it is not the whole decision. A loan with a lower APR can still cost more in pounds if it runs for much longer. A loan with fees can also be more expensive than the headline interest rate suggests.
Borrowing cost depends on:
- amount borrowed
- APR
- term length
- fees
- repayment pattern
- whether the rate is fixed or variable
Example: same loan, different APR
Here is a simple example using a £10,000 loan over five years. The monthly payment rises as APR increases, and the total interest rises too.
| Loan amount | Term | APR | Estimated monthly payment | Total repaid | Total interest |
|---|---|---|---|---|---|
| £10,000 | 5 years | 6% | About £193 | About £11,600 | About £1,600 |
| £10,000 | 5 years | 12% | About £222 | About £13,350 | About £3,350 |
| £10,000 | 5 years | 24% | About £288 | About £17,250 | About £7,250 |
The jump from 6% to 24% does not just increase the monthly payment. It can multiply the interest cost over the full term.
Why monthly payments can be misleading
Monthly payment is important because it affects your budget. But it can hide the real cost if you only compare the payment amount. A lender can make a payment look lower by stretching the debt over a longer term.
Shorter term
Higher monthly payment, but usually less total interest because the debt is cleared faster.
Longer term
Lower monthly payment, but usually more total interest because the balance lasts longer.
This is why total repayable matters. It shows the actual number of pounds you pay over the whole agreement.
Representative APR vs your personal APR
Representative APR is the rate shown in many credit adverts. It does not mean everyone accepted will receive that exact rate. It means the lender reasonably expects at least 51% of credit agreements from that promotion to be at that APR or lower.
Your personal APR may be different because lenders may assess your credit history, income, existing borrowing and affordability. A soft eligibility check can help before a full application, but it still may not guarantee the final rate.
June 2026 note: the FCA has been reviewing how APR and representative APR work in consumer credit advertising, including whether the current 51% representative APR threshold remains appropriate.
How fees change the real cost
Fees can make borrowing more expensive even when the APR looks competitive. Arrangement fees, balance transfer fees, broker fees, account fees and missed-payment fees can all affect the total cost.
The important question is whether the fee is paid upfront or added to the borrowing. If a fee is added to the loan balance, you may pay interest on the fee too. If it is paid upfront, it still increases the cost even if it does not increase the balance.
Estimate APR from payments and fees
If you know the monthly payment, term and fees, use the APR calculator to estimate the implied APR.
APR on credit cards
Credit card APR can be harder to understand than a fixed loan because the balance changes over time. If you pay the card in full each month, purchase interest may not matter. If you carry a balance, APR matters a lot.
Minimum payments can make the cost worse because they may reduce the balance slowly. A card with a high APR and low repayment can take years to clear.
Check your payoff time
Use the credit card payoff calculator to estimate how long a card balance may take to clear and how much interest you may pay.
How to compare borrowing properly
- Start with the same amount. Compare products using the amount you actually need to borrow.
- Use the same term where possible. A longer term can make one option look cheaper month to month.
- Include all fees. Add upfront, account, broker, balance transfer or arrangement fees.
- Check total amount repayable. This is the total cost in pounds, not just a percentage.
- Check flexibility. Look for early repayment charges, overpayment rules and whether the rate is fixed or variable.
- Check affordability. Use your income, bills and existing debts to decide whether the payment is realistic.
Warning signs the APR may not be the only issue
- The monthly payment only looks affordable because the term is very long.
- The product has a low introductory rate followed by a much higher rate.
- The loan includes a large fee or final payment.
- You are using new borrowing to cover normal living costs.
- You cannot comfortably afford the payment if income falls or bills rise.
- The advertised representative APR is much lower than your personalised offer.
FAQs
What does APR mean?
APR means annual percentage rate. It is designed to show the annualised cost of borrowing, including interest and certain charges.
Does a lower APR always mean cheaper borrowing?
Usually it helps, but not always. You should also compare fees, term length, total amount repayable and whether you will actually receive the advertised rate.
Why can a low monthly payment cost more?
A low monthly payment can come from a longer term. The debt lasts longer, so interest may build for more months.
What is representative APR?
Representative APR is an advertised APR that at least 51% of expected accepted credit agreements from the promotion should receive at that rate or lower.
Should I compare APR or total repayment?
Compare both. APR helps compare the annualised cost, while total repayment shows the actual amount you pay in pounds.