Balance transfer credit cards explained

A balance transfer credit card lets you move debt you already owe on one credit card to another card that charges a lower rate of interest, often 0%, for a set number of months¹. The point is simple: instead of interest eating most of each monthly payment, the interest is paused, so more of what you pay goes towards the debt itself. Moving the debt to a card with low or 0% interest could help you pay it off faster².

The catch is that most cards charge a one-off fee to make the transfer, typically a few per cent of the amount you move³, and the 0% period is time-limited. The longest deals on the market currently run to 38 months³, though the very longest offers tend to carry the higher fees and are usually reserved for people with the best credit histories⁴. There is also a window, typically the first 60 to 90 days after opening the account, within which you must complete the transfer to get the promotional rate⁵.

A balance transfer moves the debt, not the interest rate. When the 0% period ends, whatever is still unpaid starts being charged interest at the card's standard rate, so the deal only works if the debt is cleared, or nearly cleared, before then. This page explains how the transfer works, what it costs, where it does not apply, and how to avoid losing the offer.

What a balance transfer credit card does

A balance transfer is when you move debt from one credit card to another credit card¹⁰. The new card pays off some or all of what you owe on the old one, and the debt then sits on the new card with its interest rate and terms. Many balance transfer deals offer 0% interest on the amount you move for a promotional period¹¹, which effectively freezes the interest for a set period, giving you time to clear the debt without worrying about interest adding to it¹².

The mechanics are straightforward. You apply for the new card, tell the new provider which old card you want to pay off and how much, and the provider either pays the old card directly or, in some cases, puts the money in your current account for you to send on. The whole process should only take a week or so¹⁰. Some credit card companies charge a balance transfer fee to take over your unpaid debt, which can be a flat fee or depend on the amount you are transferring⁸.

A balance transfer is a form of debt consolidation: it gathers what you owe into one place, ideally at a lower cost¹³. It is not the same as a money transfer, which moves cash from a credit card into your current account rather than paying off another card, and which carries its own fees, usually around 4%³. The two products suit different situations and are compared in balance transfer vs money transfer.

Two practical points shape whether a transfer is worth doing. First, the fee is charged on the amount moved, so it is a real upfront cost that has to be weighed against the interest saved; fees may mean you save less than you expect². Second, the card you move to has its own credit limit, and you can only transfer up to that limit⁷, so a large debt may not fit on a single new card. The other types of credit card are covered elsewhere on the site.

0% periods: up to 38 months on the longest deals

The length of the interest-free window is the headline feature of a balance transfer card, and it varies enormously between deals. The longest 0% balance transfer deals currently on the market are 38 months, according to Which?'s September 2026 guide³, with other recent reporting putting the longest deals at up to 34 months¹⁴. Experian describes typical offers as lasting up to 30 months¹⁵, and 0% promotional periods on credit cards generally as lasting anything between three and 40 months¹⁶. Barclays describes the longest offers as "up to 30+ months depending on the card provider"¹⁷.

Individual providers' own cards show the spread. NatWest and Royal Bank of Scotland advertise a longer balance transfer card with a 0% offer that could be between 16 and 36 months depending on the applicant's credit assessment⁹, while Ulster Bank's balance transfer card offers 0% for up to 11 months from account opening if the transfer is made in the first three months¹⁸. RBS's purchase and balance transfer card offers 0% on both for up to 11 months¹⁹, and Tesco Bank's combined card runs for 21 months on purchases and balance transfers²⁰.

The longest deal available has moved around over the years. In December 2021 the longest deal offered up to 35 months interest-free²¹; by February 2023 the longest term was 30 months, offered by five providers: Barclaycard, NatWest, Royal Bank of Scotland, Sainsbury's Bank and Ulster Bank²³; in February 2024 it had fallen to 28 months²²; and by September 2026 it stood at 38 months³. The lesson for a borrower is that the market changes, and the figure quoted in an advert or article may already be out of date by the time you apply.

Two conditions usually attach to the headline number. The longest deals are often reserved for people with the strongest credit records⁴, so not everyone accepted for the card gets the advertised length, as NatWest's 16 to 36 month range makes explicit⁹. And the transfer must normally be made within a window after opening: the FCA found that balance transfer products typically offer 0% on balances transferred within the first 90 days of account opening⁶, and Experian puts the usual window at between 60 and 90 days⁵. A card offering 36 months is of little use if the balance arrives too late to qualify.

Balance transfer fees: typically 2% to 4% of the amount moved

Almost every balance transfer card charges a one-off fee to move the debt, worked out as a percentage of the amount transferred. The fee is added to the balance on the new card, so you pay it off as part of the debt. Independent guidance puts the typical fee at around 2% to 3% of the amount transferred², around 2%¹¹, or around 2% to 4%⁷, while Experian's transfer guide says the fee tends to be at least 3% of the amount you are transferring, though lower or fee-free deals can be found¹⁰. Which?'s guide puts the typical fee at around 3%³.

The average fee has been rising. In February 2023 the average balance transfer fee for cards with the longest interest-free periods was 2.97%; by February 2024 that had risen to 3.38%²². The average fee for transferring a balance to a fee-charging card was reported at 2.65% in early 2023, up from 2.42% the year before, with fees on some cards having increased by 2% in the previous quarter according to Defaqto research²³. Some cards charge no fee at all, while others charge up to 5% for each balance transfer²³.

Providers' own cards illustrate the range. Ulster Bank lists a 3.49% balance transfer fee on one card and 3.10% on another¹⁸. In 2020, Lloyds Bank raised its standard balance transfer fee from 3% to 5% across all its cards²⁵. At the other end of the scale, some cards charge no fee at all, and some charge up to 2.75% per transfer²¹; the longest 0% card without a fee reported in January 2022 was Santander's, at 26 months²⁶.

One fee deserves particular attention: if you move more debt onto the card after the promotional offer has finished, the transfer fee could even be as high as 18%²⁷. That is not a typo or a rare edge case, it is the standard fee some providers charge for transfers outside the offer. The details of how fees are charged are covered in balance transfer fees.

Longer 0% period or lower fee: how the trade-off works

Balance transfer deals generally trade time against cost. Cards with the longest 0% periods usually charge a fee, typically around 3% to 3.5%⁴, while fee-free cards offer a much shorter interest-free window. Barclays puts the trade-off plainly: no-fee cards "tend to offer 0% interest for a shorter period, 15 months instead of 30 say, but won't charge a transfer fee"¹⁷. Bank of Scotland gives a worked example of a card offering 0% for 12 months on balance transfers with a 1% transfer fee²⁸.

Which structure costs less depends entirely on how quickly the debt can be cleared. A fee of around 3% on a transfer is paid once, upfront, whatever happens afterwards. If the debt would take only a few months to clear, a short no-fee deal may cost nothing at all, while a long deal's fee would be money spent on time not needed. If the debt is large and would take years to clear, a longer period is likely to matter more than the fee, because the interest that would otherwise accrue dwarfs a one-off percentage charge. A credit card repayment calculator can show how long a given monthly payment takes to clear a given balance.

Many credit card companies offer 0% transfer fees as a way to encourage applications²⁷, so fee-free deals do exist, but they are usually shorter. Some cards offer 0% interest deals for a limited period, but there may be a charge for transferring a balance³⁰. The only reliable way to compare is to look at the two numbers together: the length of the 0% period and the fee, and to check whether the card also charges interest on new purchases, covered in purchases on balance transfer cards.

Where a balance transfer does not apply

The main restriction is that you cannot usually transfer a balance to a card from the same provider¹⁰. Most banks also will not let you switch balances from one of their cards to another, including cards provided by other brands they own¹. This matters more than it sounds, because several familiar high street brands sit inside the same banking group, and a card that looks like a separate company may count as the same provider for transfer purposes. The guide to who issues your credit card explains which lenders sit behind which brands.

Providers publish their own exclusion lists. Which? reported that Tesco Bank does not allow balance transfers between Tesco Bank credit cards, Capital One does not allow transfers between Luma, Ocean and Post Office credit cards and store cards it issues, Barclays does not allow transfers between Barclaycard and other partner-branded cards, and Nationwide does not allow transfers between its own cards²³. Group structures also change: from 2 April 2026, Virgin Money's business became part of Nationwide, and balance transfers between Virgin Money and Nationwide credit cards are no longer possible.

A balance transfer also cannot solve every kind of debt. It moves credit card debt, and some cards also accept store card debt⁵, but it does not directly pay off an overdraft, a loan or a bill. Moving cash from a credit card into a current account is a money transfer, a different product with fees usually between 2.99% and 5%³¹, covered in money transfer credit cards. For other kinds of borrowing, the options in debt consolidation may be more relevant.

Two regulatory points complete the picture. Under FCA rules, certain persistent-debt protections do not apply where the balance on the card was below £200 at any point in an 18-month period³². And under the Payment Accounts Regulations 2015, a bank's obligation to transfer a balance between payment accounts applies only where the consumer has requested the transfer, provided full details of the account, and there are no outstanding obligations on it³³. These are narrow provisions, but they explain why a transfer request can sometimes be refused.

Timing, your old card and your credit score

Timing has three parts: the window for making the transfer, how long the transfer takes, and what happens to the old card in the meantime. Lenders usually require you to transfer within the first one to three months of getting the card⁷, with the typical window 60 to 90 days⁵. Once requested, the transfer may take several days or even a few weeks to complete⁷, though the whole process should only take about a week¹⁰.

Transferring your balance does not automatically cancel your old credit card¹⁰. The account stays open with its credit limit until you close it, which is a decision with its own consequences: an open account with a zero balance can be neutral or helpful for your credit file, but it is also available to spend on again. The arguments each way are set out in closing old accounts after a transfer.

Applying for the card itself affects your credit file. Switching credit cards can affect your credit score¹⁰, and applying for too many credit cards, or switching too often, will show on your credit report and could negatively impact your credit score¹. Low or 0% interest credit cards are hard to get if you do not have a good credit rating², and the longest deals are usually reserved for people with good credit histories⁴. For someone with a damaged record, a credit-builder card may be the realistic first step, and how credit cards affect your credit file explains the mechanics.

How the 0% deal can be lost, and what happens when it ends

The 0% offer is conditional, and the main condition is paying on time. Missing a payment on a 0% deal can end the promotional rate, moving the whole balance to the card's standard interest rate, a consequence covered in missing a payment on a 0% deal. The standard rate is what the card charges once the offer ends, and credit card interest rates have been at or near record highs in recent years⁴, so losing the offer is expensive. Setting up a direct debit for at least the minimum payment protects the deal.

When the 0% period ends, whatever is still unpaid is charged interest at the card's standard rate from that point. Two options exist at that stage: clear the remainder, or move it again to another 0% deal, paying a fresh transfer fee and passing a fresh credit check. Repeated transfers are possible, there is no limit on how many balance transfers you can do, and you can transfer over as many credit and store card debts as you like⁵, but each application leaves a mark on your credit file¹. What happens when an offer ends is covered in when a 0% offer ends.

How much can be moved in the first place is capped by the new card's credit limit. You can only transfer up to the credit limit on your balance transfer card⁷, and in practice most providers cap the transfer at 90% to 95% of the limit¹⁰. Experian puts the usual maximum at up to 90% of your credit limit⁵. If your debt is larger than the limit offered, only part of it will move and the rest stays where it is, still accruing interest at the old rate.

One protection is worth noting. Purchases made on a credit card for more than £100 and up to £30,000 carry Section 75 protection, meaning the card provider is jointly liable with the retailer if something goes wrong³⁴. That protection follows the card the purchase was made on, not the borrower, so transferring a balance away from a card does not remove Section 75 rights connected to purchases made on it, though claims are simplest while the account is still open.

Free help with credit card debt

A balance transfer is one option among several for dealing with card debt, and it is not always the right one. If the debt is large relative to your income, if you are struggling to make minimum payments, or if your credit record is poor enough that the longest 0% offers are out of reach, free debt advice is worth more than any promotional offer. Charities and advice services can look at the whole picture, including debts a transfer cannot reach, and their help is free.

• StepChange Debt Charity provides free debt advice online and by phone, including guidance specifically on paying off credit card debt and on when consolidation helps².
• Citizens Advice offers free advice across England, Wales, Scotland and Northern Ireland, with Scotland-specific guidance on credit card costs and charges³⁵.
• National Debtline provides free guidance on debt consolidation, including the costs to check before moving any debt¹³, and on repayment methods such as the debt avalanche approach³⁶.
• MoneyHelper, the free government-backed service, covers banking basics and where to get debt help.

A transfer can be part of a plan to clear debt, but it is a tool, not a solution in itself. The debt still has to be repaid, the fee still has to be paid, and the 0% clock keeps running whatever else happens. For a structured look at the alternatives, including repayment strategies and what to do when the minimum payments are unaffordable, see help with credit card debt and the wider guide to debt.