Cost of credit
APR, interest and total repayable
Three numbers that look similar and mean different things. Here is what each one tells you, and which to compare on.
Written by the UKPayday editorial team
Updated 13 July 2026
11 min read
The short version
- The interest rate shows how interest is charged.
- APR is the standard way to compare yearly cost.
- Total repayable is the cost in pounds, start to finish.
- A lower monthly payment can mean a higher total.
Credit offers contain several numbers that can look similar while telling you different things. The interest rate describes how interest is charged. APR gives you a standard way to compare the yearly cost of credit. Total repayable shows how much money you are expected to pay back if the agreement runs as planned.
None of these figures should be read alone.
A low repayment can come with a longer term and a higher overall cost. A high APR can look especially striking on short term credit, but it must still be taken seriously. The total repayable may be easy to understand in pounds, but it does not tell you whether each payment will fit your budget.
Reading the figures together gives you a much clearer view of an offer.
Start with the amount of credit
The amount of credit is the amount you are borrowing. It may also be described as the loan amount, credit amount or principal.
This is not the same as the total repayable. If you borrow £500, the amount of credit is £500. Interest and any compulsory charges are then added according to the agreement.
Check that the amount shown is the amount you requested. Borrowing more than you need normally means paying more interest. A lender offering a higher amount does not make that amount suitable or affordable.
You should also confirm how and when the money will be provided. Do not assume that an advertised maximum is the amount you will receive. The lender decides whether to approve the application and how much it is prepared to offer.
What the interest rate means
Interest is the price charged for using borrowed money. It is usually shown as a percentage rate.
The rate may be applied to the original amount borrowed or to the balance still outstanding. Interest may be calculated daily, monthly or in another way set out in the agreement. These details affect the actual cost.
An annual interest rate tells you the rate used over a year. It does not always include every compulsory fee connected with the credit. This is one reason it can differ from the APR.
Two loans showing the same interest rate can still cost different amounts if they have different fees, repayment schedules or terms. The interest rate is important, but it is not always the best figure for comparing complete costs.
Fixed and variable interest rates
A fixed rate is intended to remain the same for the period stated in the agreement. This normally makes scheduled payments easier to predict.
A variable rate can change in the circumstances described by the lender. If the rate rises, the cost of borrowing may rise as well. Depending on the agreement, this could change the repayment amount, the loan term or both.
Check whether the rate is fixed or variable and read the conditions that explain when a change can happen. Do not assume a payment will stay the same unless the agreement confirms it.
What APR means
APR stands for Annual Percentage Rate.
It converts the cost of credit into a standard yearly percentage. The calculation takes account of interest and certain compulsory charges, as well as the amount borrowed and the timing of repayments.
The purpose of APR is comparison. Credit products can use different rates, fees and payment structures. Expressing the cost through one standard calculation makes it easier to compare them on a consistent basis.
APR is not simply the interest rate with a different label. If a loan has a compulsory fee, the fee may be included in the APR even though it is not part of the stated interest rate. This can make the APR higher.
The FCA rules contain detailed requirements for calculating the total charge for credit and APR. They explain that certain required charges can form part of the total cost. You can read the FCA total charge for credit rules for the formal position.
Why APR can be high on short term credit
APR expresses cost on an annual basis even when the agreement lasts for much less than a year.
If money is borrowed for a short period, the calculation still converts that cost into a yearly percentage. This can produce an APR that looks much larger than the percentage cost over the actual loan term.
That does not mean the APR is a mistake or that it should be ignored. It remains an important warning about the relative cost of the credit. A high APR tells you that the borrowing is expensive when measured using the standard annual calculation.
It also does not mean that the stated APR percentage will simply be added to the amount borrowed. The amount you are scheduled to pay under that particular agreement is shown by the repayments and total repayable.
For short term borrowing, look at both the APR and the total cost in pounds. APR supports comparison. The total repayable shows what the agreement is expected to cost if every payment is made as agreed.
What representative APR means
An advert or comparison page may show a representative APR rather than the personal APR that will apply to you.
The representative APR must reflect the rate that the firm reasonably expects will apply to at least 51 percent of the credit agreements resulting from that promotion. It does not mean that 51 percent of all applicants will be approved. It also does not guarantee that you will receive that rate.
Your actual offer may have a different APR because the lender considers your circumstances, the amount requested, the term and its own lending criteria.
Always check the APR in your personal offer before accepting. The representative figure is useful at the advertising stage, but your agreement contains the figures that matter to your borrowing.
FCA rules require a representative APR to be labelled as representative. A rate that can change must be described as variable. The requirements are explained in the FCA rules for credit promotions.
Total charge for credit
The total charge for credit is the cost of borrowing over the agreement. It generally includes the interest and the charges that must be included under the relevant rules.
If you borrow £500 and the total charge for credit is £120, the borrowing is expected to cost £120 when the agreement is followed as planned.
This figure is useful because it separates the cost from the money being returned to the lender. It answers a straightforward question: how much am I paying to borrow this money?
Charges caused by breaking the agreement, such as a late payment charge, are not part of the normal scheduled cost in the same way. Read the agreement to understand what could be charged if a payment is missed.
What total repayable means
The total repayable is the full amount you are scheduled to pay back over the agreed term.
It normally consists of:
If you borrow £500 and the total charge for credit is £120, the total repayable would be £620.
This is often the clearest figure for understanding the cost in pounds. It shows how much is expected to leave your pocket in total if the agreement continues exactly as set out.
The figure is based on assumptions. It normally assumes payments are made in full and on time. Paying late, changing the agreement or settling early may alter the final amount.
Repayment amount and frequency
An offer should tell you how much each payment will be, how many payments are required and when they are due.
Check whether repayments are weekly, monthly or collected on another schedule. A figure that looks small can become expensive when it is due more often than expected.
Multiply the repayment amount by the number of payments. The result should match the total repayable, allowing for any different first or final payment shown in the schedule.
Each repayment must fit your budget after rent or mortgage costs, Council Tax, energy, food, travel, existing debts and other essential spending have been covered.
A loan is not affordable simply because the lender approves it. You must be confident that you can make every payment without borrowing again, missing another bill or going without essentials.
How the term changes the cost
The term is the period over which the credit is repaid.
Spreading a loan across more months can reduce the regular repayment. This may make the payment look easier to manage. However, paying interest for longer can increase the total repayable.
Consider two offers for the same £1,000 loan.
Offer one requires six payments of £200. The total repayable is £1,200 and the cost of borrowing is £200.
Offer two requires 12 payments of £115. The payment is lower, but the total repayable is £1,380 and the cost of borrowing is £380.
The second offer requires less each month but costs £180 more overall. This example is for explanation only and is not based on a particular lender or product.
The right comparison must consider both affordability and total cost. A repayment you cannot maintain is not a suitable choice. A longer term should not be selected without understanding the extra cost it may create.
Which number should you compare
Use APR when comparing the cost of comparable credit offers. It is designed to provide a standard percentage measure that includes interest and relevant compulsory charges.
For the strongest comparison, look at offers for the same amount over the same term. In that situation, a lower APR will generally point to the cheaper credit option, assuming the other features are the same.
Then compare the total repayable. This tells you the expected cost in actual pounds and makes the financial difference easy to see.
Finally, compare the repayment amounts and dates with your budget. The cheapest offer overall is not affordable if the scheduled payments are too large or arrive at the wrong time.
The practical answer is:
- Use APR to compare the rate and required costs.
- Use total repayable to compare the complete cost in pounds.
- Use each repayment to test affordability.
- Use the term to understand how long the commitment lasts.
No single number answers every question.
Why a lower APR can still cost more overall
A loan with a lower APR can have a higher total repayable if it runs for much longer.
This is not a contradiction. APR measures annual cost in a standard way. Total repayable measures the pounds paid across the full agreement. A longer term gives interest more time to build up.
This is why comparing APR alone can give an incomplete picture when the loan amounts or terms are different.
Keep the amount and term as similar as possible when comparing offers. If the terms differ, give close attention to the total repayable and number of payments.
Fees and optional products
Check whether the offer includes an arrangement fee, account fee, broker fee or charge for another service.
Certain compulsory charges are included when APR and the total cost of credit are calculated. Optional services may be shown separately.
Do not agree to an extra product without understanding what it is, what it costs and whether you need it. If buying another service is required to obtain the advertised credit terms, that cost may need to be reflected in the APR calculation.
UKPayday does not charge customers a fee for using its credit broking service. A lender or another broker in the process should explain any charges that apply to its service or agreement.
Late payment costs are different
The figures in an offer normally show what happens when the agreement is followed correctly. Missing a payment can create additional costs and may affect your credit record.
Check the agreement for late payment charges, default interest and the steps the lender may take when a payment is missed.
Do not treat these charges as part of the planned cost. They are consequences of failing to follow the agreement and should not be relied upon as extra time to pay.
If you think you will miss a payment, contact the lender as early as possible. Waiting can reduce the options available.
Early repayment
Paying a loan off early may reduce the interest you pay, but the exact result depends on the agreement and the rules that apply.
Ask the lender for an early settlement figure. This is the amount required to close the agreement on a particular date. Do not calculate it by simply adding the remaining scheduled payments, as the lender may need to apply an interest rebate or other adjustment.
Check whether any permitted charge applies and compare the settlement figure with the payments that remain.
A quick way to read any offer
Before accepting credit, answer these questions:
- How much will I receive?
- What is the interest rate and is it fixed or variable?
- What is my personal APR?
- What is the total charge for credit?
- What is the total repayable?
- How much is each payment?
- How many payments are required?
- When will each payment be collected?
- What happens if I pay late?
- Can I afford the payments while covering essential costs?
If any answer is unclear, ask the lender before agreeing.
How UKPayday fits into the process
UKPayday is a credit broker, not a lender. We search a panel of participating lenders and brokers rather than the whole market.
Any example shown on UKPayday is an illustration of possible borrowing costs. It is not a personal quote or a guarantee that you will receive those terms.
If a potential match is found, the lender decides whether to approve the application and what amount, rate and term to offer. UKPayday does not provide the funds or set the cost of the loan.
Read the lender's offer and credit agreement carefully. Check the personal APR, total repayable, payment schedule and any charges before deciding whether to continue.
You are not required to accept an offer simply because one is available.
The main point
APR, interest and total repayable describe different parts of the same agreement.
The interest rate shows how interest is charged. APR provides a standard measure for comparing the annual cost of credit. Total repayable shows the expected full cost in pounds, including the money borrowed.
For comparable offers, start with APR. Confirm the result by checking the total repayable. Then make sure every payment fits your budget for the whole term.
The best offer is not merely the one with the lowest payment. It is the one you fully understand, can afford to repay and can complete at the lowest suitable overall cost.
Warning: Late repayment can cause you serious money problems. For help, go to MoneyHelper.
This guide is general information, not financial advice. Representative 79.5% APR variable. Borrow £1,000 over 18 months, 18 monthly repayments of £89.22, total amount repayable £1,605.96, interest £605.96, annual interest rate 59.97% fixed.
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