Spreading the cost has a price, and it isn't the monthly figure

A catalogue account is a credit agreement. What you pay each month is only part of the arithmetic; the representative APR, the length of the term and whether you pay the minimum or more all decide what the credit actually costs on top of the goods.

See how minimum payments extend the term and the interest

What the representative APR actually tells you

What the number actually measures

The representative APR (Annual Percentage Rate) is the cost of borrowing over a year, shown as a percentage of what you owe, and it includes interest plus any standard fees the lender charges. A catalogue account with a representative APR of 39.9% is telling you that borrowing £100 for a year would cost roughly £39.90 in interest and charges, assuming the balance stays at £100 throughout, which in practice it rarely does because you're paying it down and sometimes adding to it.

Why "representative" does not mean "yours"

Lenders are required to advertise a representative APR, which means at least 51% of people who are accepted for the account get that rate or better. The remaining share, up to 49%, can be offered a higher rate, based on their credit history and how the lender scores their application. So the figure printed on the catalogue's website or in its terms is a guide to what a typical successful applicant pays, not a quote for you specifically, and the rate you're actually given only appears once you apply and the lender assesses you.

How the rate changes what you pay back

The APR determines how much of each payment goes on interest, and a higher APR means more of your monthly payment is absorbed before the balance moves. As an illustrative example only, dated January 2025: spreading a £200 purchase over 12 months at a representative APR of 39.9% adds roughly £43 in interest over the year, so you repay around £243 in total. That figure uses this rate and this repayment pattern only. A different APR, a longer term, or a lower monthly payment changes the total, sometimes by a large margin, which is why the same purchase can cost noticeably different amounts depending on how it's repaid. The Catalogue Account Cost Calculator lets you put in your own purchase price, APR and monthly payment to see the total for your figures, though the calculator can only work with the figures you give it and can't tell you what rate you'll actually be offered.

Where the rate sits in the total cost

APR is one part of what spreading the cost costs you. Paying a lower amount each month over more months keeps the balance outstanding for longer, so interest keeps being charged on it for longer too, which is covered in more detail in the minimum-payment trap. The APR sets the rate; the term you choose and the size of your monthly payment set how much that rate actually costs you by the time the balance is cleared.

This is general information about how APR works, not financial advice about which account or repayment plan suits your circumstances. For help weighing up a specific credit decision, see MoneyHelper (moneyhelper.org.uk) or check a lender's status on the FCA register (register.fca.org.uk).

Payment approach	Total interest paid	Time to clear the balance	What to check
Paying in full	None, because no credit is used and the balance is settled straight away.	Immediate, on the date the payment is taken.	Whether the catalogue price itself is higher than paying by card or bank transfer elsewhere.
Fixed monthly amount over an agreed termSee the calculator to see what a specific APR and term add to a given balance.	Interest is charged on the outstanding balance each month, so the total paid is higher than the cash price. How much higher depends on the APR charged.	Clears at the end of the agreed term, provided every payment is made on time.	The representative APR shown before you commit, and whether an interest-free period reverts to a standard rate partway through.
Minimum payments onlyThe mechanism behind this is set out in the minimum payment trap guide.	Interest keeps being added to a balance that falls only slowly, so the total interest paid over the life of the account is normally far higher than under a fixed term.	Can run to several years, since each payment covers little more than that month's interest at first.	The minimum payment warning printed on the statement, which shows how long clearing the balance at that payment would actually take.

This shows the general pattern; the actual amounts depend on the balance and the representative APR (Annual Percentage Rate) charged. Use the cost calculator to work through your own figures.

What happens when an interest-free period ends

How a promotional period works

A catalogue account may offer a set number of months, often six or twelve, during which no interest is charged on a purchase (an interest-free period, sometimes called deferred interest). Provided the account holder keeps up the minimum payment set out in the credit agreement, nothing is added to the balance during that window. Once the period ends, whatever is still owed switches to the account's standard rate, normally quoted in the agreement as a representative APR (Annual Percentage Rate).

What happens to the balance once the standard rate applies

From the date the promotional period ends, interest is charged going forward on whatever balance remains, at the rate set out in the agreement. Paying the same monthly amount as before now means a larger share of each payment covers interest, so the balance can take longer to clear. This is the point at which the standard rate starts to shape the total cost.

A worked example

Illustrative example, dated January 2025, using figures not tied to any specific provider:

Purchase price: £300
Promotional period: 6 months, interest-free
Balance remaining at month 6: £180
Standard APR applied from month 7: 39.9% (illustrative)

Interest starts accruing on that £180 from month 7 at the standard rate, added to the amount owed. What it actually adds up to depends on the payments made each month afterwards, which is why a single example figure cannot stand in for a reader's own statement.

What to check before the period ends

The credit agreement or monthly statement gives two things worth checking ahead of the deadline: the exact date the interest-free period ends, and the standard APR that applies once it does. Clearing the balance before that date means the purchase costs nothing in interest at all. Paying more than the minimum before the deadline, where clearing it fully is not possible, reduces the balance interest is later charged on.

Running the account's own figures through the catalogue account cost calculator shows what a remaining balance is likely to cost once the standard rate applies, and it can give a wrong answer if the figures entered do not match the agreement. The minimum payment trap guide sets out how a low payment extends the term, and the interest charged, still further.

The minimum-payment trap

How a low monthly payment stretches the term and the interest with it

A minimum payment is calculated to keep an account technically up to date. Here is what happens to the balance, month by month, when that is the only payment made.

The minimum is set as a share of the balance

Most catalogue credit agreements calculate the minimum payment as a percentage of what you currently owe, subject to a fixed floor amount if that percentage would be too small to matter. The figure on your statement each month is not chosen to repay the debt in a reasonable time. It exists to satisfy the terms of the agreement, and the retailer's own repayment estimate on the statement usually assumes you pay more than this.
Interest is charged on the balance before your payment reduces it

Each month, interest is added to whatever you still owe, and only then is your payment applied. If the minimum payment is close to that month's interest charge, very little of it goes toward the original amount you borrowed. The balance falls slowly, so the following month's interest charge falls only slightly too.
As the balance shrinks, so does the minimum, and the term keeps stretching

Because the minimum is usually a percentage of the balance, it drops as the balance drops. That keeps the payment low and the interest charge running for longer than a fixed payment would. What you pay each month depends on which of these two paths you're on.

Paying the minimum only
Most of each payment covers interest, so the balance and the required minimum both fall slowly. The account can run for years beyond the timeframe implied when the purchase was made.

Paying a fixed amount above the minimum
The payment stays the same while the balance falls, so a growing share of it reduces what you owe. The balance clears in a set number of months.
The total interest paid depends on how long the balance is carried

Interest is charged for as long as a balance remains, so stretching the term stretches the total interest with it. A purchase paid off quickly costs close to its price tag. The same purchase carried for years at minimum payments can cost substantially more than the goods themselves, even though the monthly figure looks manageable throughout.

The cost calculator lets you enter your own balance and payment amount to see how the term and total interest change.
What to check on your own statement

Your statement shows the current balance, the minimum payment due and the interest rate applied that month. Comparing the minimum payment to the interest charge tells you how much of it is actually reducing what you owe.

This is general information, not financial advice. For help with a specific decision, see MoneyHelper at moneyhelper.org.uk or check a firm's status on the FCA register at register.fca.org.uk.

For the full mechanism with a worked example, see The Minimum Payment Trap on Catalogue Accounts. To try the numbers on your own balance, use the Catalogue Account Cost Calculator.

See what spreading the cost would mean for you

Put in a purchase price, a term and an APR to see the total cost. The calculator can only work with the figures you give it, so treat the result as illustrative rather than a quote.

Try your own figures on the catalogue account cost calculator at /tools/cost-calculator/index.html New to catalogue credit? Read how home-shopping catalogues work now, at /how-catalogue-credit-works.html.