How the Interest-Free Period on Purchases Works

An interest-free period is the amount of time you have to pay back what you owe on a credit card before having to pay any interest¹. On purchases, most cards give you up to 56 days to make a repayment before interest is applied, as standard¹. That is the headline figure, and it is the one most people recognise: research for the financial regulator found consumers describing the 56 day interest free period as a specific feature of their card².

The catch is in the word "up to". The 56 days is the longest possible gap between buying something and the payment deadline, and it only happens for a purchase made at the right moment in the billing cycle. Buy something the day before your statement is produced and you get far fewer days. And the whole thing depends on one condition: paying the statement balance in full and on time. If you do not repay in full, you will usually be charged interest on your transactions at the relevant rate, from the date the transactions were added to your account until they are repaid in full¹.

This page explains how the period is calculated, what it costs to lose it, which transactions never qualify, and how the promotional 0% deals that run for months rather than weeks fit alongside it.

What the interest-free period on purchases is

The interest-free period is a grace window, not a discount. It exists because of the gap between three dates: the day you make a purchase, the day your statement is produced, and the day payment is due. Nothing is charged during that window provided the balance is cleared by the due date. MoneyHelper puts the rule simply: provided you pay the bill in full and on time each month, you will not be charged interest⁵. Citizens Advice states the same: if you pay off the total amount by the due date, you will not be charged interest⁶.

Most credit cards offer an interest-free period on what you have bought if you pay off your bill in full⁸. It is not, however, a universal feature. Some cards carry no interest-free period on balance transfers or cash withdrawals, and providers say so in their terms⁹. The length also varies by lender: one provider's guidance describes a window of between 25 and 55 days depending on the lender¹³, while the 56 day figure is the standard maximum quoted by the largest issuers¹⁴.

The period applies to purchases. It does not apply to everything you can do with a card, and the exceptions matter more than the rule for anyone who uses a card for cash or gambling.

Up to 56 days: how the billing cycle sets the length

The 56 days is not a fixed term that starts when you buy something. It is the sum of two gaps: the time from a purchase to the statement date, and the time from the statement date to the payment due date. A purchase made immediately after a statement is produced sits through a full billing cycle before it appears on a bill, then gets the payment window on top. A purchase made immediately before the statement date gets only the payment window.

One provider sets out the arithmetic with a worked example: if your credit card billing cycle is 31 days and you make a purchase on 1 October, you may have until 25 November to pay this money back without being charged interest¹. That is the long end of the range. The same card, bought a few days later in the cycle, gives a much shorter run.

The maximum is quoted consistently across the largest issuers. Barclays says the interest-free period on all its credit cards is 56 days if you pay off your statement balance in full and on time and within your credit limit¹⁴. NatWest describes up to 56 days interest free on purchases where no promotional rates apply¹⁵. RBS and Bank of Scotland both quote up to 56 days' interest-free credit if the full balance owed on the card is paid each month¹⁶. One smaller card quotes up to 51 days interest-free on purchases if the full balance is paid off each month¹⁸, which shows the figure is a maximum set by each lender's own cycle, not a market-wide guarantee.

The interest-free period only applies if you pay in full

This is the condition that decides whether the period means anything. Pay the whole amount owed on the card by the due date and no interest is charged on your purchases⁶. Pay less than that and the position changes completely: interest is charged on your transactions at the relevant rate, from the date the transactions were added to your account until they are repaid in full¹.

That backdating is the part people miss. Interest does not start from the statement date or from the day you failed to pay. It runs from the day each purchase was made. A balance carried over for several months therefore accrues interest on transactions that may be months old.

Providers build in a second condition too. Bank of Scotland says you normally get an interest-free period of up to 56 days if you pay your full main balance, not including any introductory or promotional balances, and did the same the previous statement period¹⁷. Lloyds Bank sets out the same rule: you will not pay interest on purchases if you pay off your full main balance plus any instalment plan payments, or at least your minimum payment if higher, and did the same the previous statement period¹⁹. In other words, one month of clearing the balance is not always enough to restore the grace period; the previous statement period has to have been cleared as well.

What happens if you only make the minimum payment

Paying the minimum keeps the account in good standing and avoids late payment charges, but on a standard card it does not preserve the interest-free period. One provider states it directly: if you only make the minimum or a partial payment on your credit card, you will lose your interest free period and will have to pay interest from the date of the purchase until it is repaid in full⁴. Another puts the same point the other way round: the only way you can avoid paying interest is if you have an interest-free card or if you pay off your credit card bill in full²⁰.

There is a second trap. Even if your card offers an interest-free period on purchases, if you do not make the minimum payment each month you will be charged interest on your balance²¹. So the minimum payment is a floor you must clear, not a target that preserves the grace period.

On a promotional 0% deal the mechanics differ. During the offer you can pay only the minimum and still avoid interest, but the minimum is still required: even though you will not pay interest during the 0% period, you will still need to make the minimum monthly payments²². Miss one and the deal itself is at risk. One provider warns that if you miss a payment during the 0% interest period, you may be charged a fee and lose your interest-free status²³.

Do cash withdrawals get an interest-free period?

No. The regulator's own market study states it flatly: there is no interest-grace period on cash withdrawals². Providers repeat it in their terms. One card states there is no interest-free period for cash withdrawals²⁴; another says there is no interest-free period on cash transactions²⁵. Nationwide's cards carry the same exclusion for balance transfers and cash withdrawals⁹.

The cost is not just the lost grace period. Cash withdrawals attract a withdrawal fee, as well as a higher APR, and do not enjoy the interest-free period available for purchases³. Interest is charged from the day you took the money out²⁶. Some transactions carry higher fees which may apply even within the interest-free period on purchases, including buying foreign currency, buying gambling or betting chips, and withdrawing cash¹.

How long 0% purchase deals last

A 0% purchase card is a different product from the standard interest-free period. Instead of a few weeks of grace, the card charges no interest on purchases for a set promotional period, which may last between 3 and 20 months on purchase cards²⁷. Independent guidance in September 2026 put the longest deals on the market at 26 months interest free³, while a February 2026 guide described 0% periods of up to 25 months²⁸. One provider notes that some cards stay interest-free for around three to six months while others may go up to around 30 months or more²².

The range has narrowed over time. In February 2023, a cardholder could get an interest-free period for up to 24 months; by early 2024 the longest-lasting deal was 21 months, and the average interest-free period among the top five cards on the market had fallen from 23 months to 19.8 months²⁹. More recently the direction has turned: the Bank of England's Credit Conditions Survey found that the length of interest-free periods on new credit cards for purchases increased in the first quarter of 2026, and was expected to increase slightly in the second³⁰.

Two things to hold in mind. First, the advertised period is a maximum and depends on the borrower: someone with a low credit score may still get a 0% card, but the interest-free period is likely to be shorter²². Second, promotional periods end. Most zero% interest deals only last for a number of months, and a lender may be able to end a zero% interest deal early if you fall behind with regular payments²². When an interest-free period ends, any remaining balance on your credit card will accrue the standard rate of interest¹.

If you miss paying in full, when the period comes back

The interest-free period on purchases normally returns once the full statement balance has been cleared by the due date, and providers generally require the same to have been done in the previous statement period¹⁷. Until both conditions are met, interest continues to run on the outstanding balance from the original transaction dates¹.

If the missed payment was on a 0% promotional deal rather than a standard card, the position is more serious. Missing a payment during the 0% interest period may mean a fee and the loss of interest-free status²³, and a lender may be able to end a zero% interest deal early if you fall behind with regular payments²². The promotional rate is a contractual offer, not a right, and it can be withdrawn.

Where a card balance has become difficult to clear, free and impartial help is available. MoneyHelper offers guidance on managing borrowing, and debt advice charities including StepChange and National Debtline provide free support. The Financial Ombudsman Service can look at a complaint about a card provider if the firm has not resolved it; in the first quarter of 2025/26 it received 68,000 new complaints and upheld 31% of them²⁶.