Missing a Payment on a 0% Deal: Losing the Offer

A 0% balance transfer deal freezes interest on debt you move across for a set period, so more of each payment goes to the balance itself. Miss a payment, or go over your credit limit, and the provider can end that promotional rate early. You then pay the card's standard rate on whatever is left, plus a late payment fee, and the missed payment is recorded on your credit file.

The deal is not cancelled in the sense that the debt becomes due. The balance stays, the minimum payment stays, and only the interest changes. But the change can be expensive: the whole point of the transfer was to stop interest building, and once the promotional rate goes, interest starts on the outstanding amount at the standard rate.

This page covers what triggers the loss of a 0% deal, what it costs, what appears on your credit file, whether the offer can be reinstated, and where to get free help if the payments have become unaffordable.

A missed payment can end the 0% rate early

The promotional rate on a balance transfer is a contractual term, not a permanent feature of the card. Independent guidance is explicit that a lender may be able to end a zero per cent interest deal early if you fall behind with your regular payments⁷. The same warning appears across debt advice services, which is a sign of how often it happens in practice⁷.

Providers say the same thing in their own terms. One card issuer states plainly that you may lose your 0% period early if you miss payments or go over your credit limit¹. Another describes the outcome more bluntly: miss a payment and your 0% deal could be voided, with higher interest rates to pay instead⁸. A third warns that missing a payment during the 0% interest period may mean a fee and the loss of interest-free status⁹.

Two triggers come up repeatedly, and they are worth separating:

• Missing a payment. Paying nothing, or paying less than the minimum, leaves the account in arrears.
• Going over your credit limit. Spending past the limit, even by a small amount, is treated as a breach of the agreement in the same way.

A third, quieter risk is the end of the promotional period itself. If the balance is not cleared by the time the offer expires, interest starts on what remains². That is not a missed payment, but it produces the same result: interest on a balance you had planned to clear interest-free.

What happens to your balance and interest rate

Nothing about the balance changes when the deal ends. What changes is the rate applied to it. If you transferred a balance during a 0% offer, you are charged interest at your standard rate on any balance remaining after the offer ends¹⁰. The standard balance transfer rate is the one that applies to whatever is left¹¹.

The practical effect is that the debt starts growing again, or at least stops shrinking as fast. On a 0% deal, every pound you pay above the minimum reduces the balance directly. Once interest is being charged, part of each payment covers the interest and only the remainder reduces what you owe.

There is a second trap that catches people who keep spending on the same card. The 0% rate is often applied only to balance transfers, not to new purchases, which may be charged interest from the start¹². So a card that feels interest-free can be quietly accruing interest on new spending even while the transferred balance sits at 0%.

The length of the promotional period varies widely. Official guidance describes interest-free periods on transferred balances of usually six to nine months¹³, while the longest deals on the market run considerably longer. One independent review put the longest 0% balance transfer deals at 38 months⁵. The longer the deal, the more a missed payment in month three or month thirty costs, because the interest-free window you lose is longer.

Late payment fees and your credit file

Two separate costs land when a payment is missed: a charge from the provider, and a mark on your credit file.

On the charge, missed or late payments can incur a fee as well as affecting your credit score¹⁴. The size of the fee depends on the card and is set out in its terms. Separately, the transfer itself usually carried a fee when you set it up: most cards charge a fee to transfer the balance, typically around 3%⁵, and the longest deals often come with a fee of around 3% to 3.5%¹⁵. That fee is charged once, at the point of transfer, and is not refunded if the deal later ends.

On the credit file, late payments stay on your credit history for six years, as do missed payments and defaults⁴. That is a long shadow. It can affect applications for credit cards, loans and mortgages for years after the arrears are cleared.

Who the mark appears against depends on whose name the debt is in:

If missed payments continue, the consequences escalate. The missed payments are recorded on your credit file, and the creditor will soon consider sending a default notice for credit card or buy now pay later debts, alongside other recovery steps¹⁷.

Ask the provider first: getting the offer reinstated

There is no general right to have a promotional rate restored, and no rule that says a provider must reinstate it. What exists is a conversation, and it is worth having early.

The first thing a lender will usually do is try to make a plan with you to recover the payments you missed¹⁸. That is a recovery conversation, not necessarily a reinstatement one, but it is the opening. If the missed payment was a one-off caused by a change of date, a lost direct debit or a bank switch, saying so plainly and clearing the arrears immediately gives the provider something to work with.

If the provider refuses and you believe the treatment was unfair, there is a formal route. You can complain to the provider first, and if that does not resolve it, take the complaint to the Financial Ombudsman Service, which is free to consumers⁶. The ombudsman can order redress. Where a complaint about unaffordable lending is upheld and a balance is outstanding, the approach is to tell the lender to remove all the interest and charges applied from the start, so that a new starting balance consisting of only the amount lent is left, and then deduct any payments already made¹⁹.

That is a remedy for a specific kind of complaint, not a general undo button for a lost 0% deal. But it shows the principle: where a provider has treated a customer unfairly, the interest and charges can be stripped out.

How to avoid missing a payment on a 0% deal

The most common causes of a missed payment are administrative rather than financial: a direct debit that did not move with a bank switch, a date that fell on a weekend, a card that was replaced and the new details never updated with the lender.

A few practical points:

• Set the direct debit for the minimum at least. Balance transfer cards require at least the minimum amount each month to keep the 0% deal². A direct debit for the minimum protects the deal even in a month when you cannot pay more.
• Check what the minimum actually is. Minimum repayments are typically around 3% of the balance or £5, whichever is higher³. As the balance falls, so does the minimum, which is why paying only the minimum means the balance does not go down much²⁰.
• Watch the transfer window. There is usually a time limit for transferring balances at 0%, typically between 60 and 90 days¹². Some providers specify 60 days to benefit from the 0% offer²¹.
• Do not rely on a partial bank switch to move a direct debit. A partial switch does not transfer your money across²³, and you are not covered by the current account switch guarantee, so you are not automatically refunded for charges incurred when a direct debit or standing order fails to transfer properly²⁴.
• Keep the promotional end date in your calendar. The deal ending is not a missed payment, but it has the same effect on your interest if the balance is still there.

If you are struggling to repay: where to get help

Missing a payment because of a temporary slip is one thing. Missing payments because the money is not there is a different problem, and the rules recognise it.

Firms have a duty to offer support if you have missed a payment, which can include pausing interest and charges before taking further action such as taking you to court⁶. For buy now pay later credit, if you miss a repayment, firms need to contact you to let you know and explain what this means, and lenders need to provide support if you are struggling to make repayments²⁴.

Free, impartial help is available and does not cost anything:

• StepChange provides free debt advice, including on consolidating credit card debt and on paying off card debt²⁵.
• National Debtline publishes free guidance on debt consolidation and on what happens when debts are not paid⁷.
• Citizens Advice covers the costs and charges of credit cards and how to check whether a financial service has followed the rules²⁶.
• The Financial Ombudsman Service handles complaints about financial firms free of charge⁶.

Moving debt to a card with low or 0% interest could help you pay off the debt faster²⁰, and many balance transfer deals offer 0% interest on the amount you move²⁶. But a new transfer usually carries a fee, and a recent missed payment will count against a new application. Before taking on more credit, it is worth checking for hidden fees, including on 0% balance transfers²⁵, and understanding what happens once any new offer expires²⁵.

If the difficulty is wider than one card, free debt advice services can look at the whole picture, including whether a debt solution would suit your circumstances better than another transfer.