A 0% balance transfer card lets you move existing credit card debt to a new card and pay no interest for a set period. A transfer fee usually applies, and the 0% rate ends on a fixed date.
This article is for information only. It explains how balance transfer cards work in general terms. It does not constitute financial advice and does not recommend any specific product or provider. Your circumstances will affect which options are available to you.
What is a balance transfer card?
A balance transfer card is a credit card that lets you move an existing credit card balance to it. For an introductory period, the card charges 0% interest on the transferred amount. During that period, every pound you pay reduces the actual debt rather than going partly towards interest.
According to MoneyHelper, introductory 0% periods typically range from around 12 to 30 months, and transfer fees typically fall between 1% and 3% of the amount moved, though both figures vary by card and can change over time. It is worth checking MoneyHelper or individual lender websites for current figures before you apply.
The 0% rate applies to the transferred balance only. It ends on a fixed date, regardless of how much you have left to repay.
How does a balance transfer actually work?
The process has three broad stages.
Applying for the new card. You apply as you would for any credit card. The lender carries out a credit assessment, including a hard search of your credit file. You will be offered a credit limit based on that assessment.
Requesting the transfer. Once the card is open, you request a transfer of the balance from your old card. You usually provide your old card details and the amount you want to move. Most providers ask you to do this within a set window, often 60 to 90 days of opening the account. Missing that window can mean losing the 0% offer.
The transfer fee. Almost all balance transfer cards charge a transfer fee, expressed as a percentage of the amount moved. The fee is added to your new balance. On a £3,000 transfer with a 3% fee, you would owe £3,090 on the new card.
Some cards offer a fee of 0%, but these tend to come with a shorter introductory period.
What happens when the 0% period ends?
This is the part that catches people out.
When the introductory period expires, the remaining balance moves to the card's standard revert rate. Revert rates on balance transfer cards are often higher than standard purchase rates on ordinary cards. Missing the end date means you could quickly accumulate the kind of interest you were trying to avoid.
It is worth recording the end date of the 0% period as soon as you open the card. If you are unlikely to clear the full balance before that date, you may want to review your options several months beforehand.
It is also worth thinking about what to do with the old card once the transfer is complete. Many people keep it open and continue spending on it, which can leave a second balance accruing interest. Closing the old card, or at least putting it away, can help avoid that.
What to check before applying
Before you apply, it is worth going through the following.
The representative APR. This is the rate that applies after the introductory period. Under FCA rules, the representative APR shown in advertising is the rate offered to at least 51% of successful applicants. The rate you receive may differ. Checking the representative APR gives you a reference point for what the card could cost if you do not clear the balance in time.
Your eligibility. Many providers offer a soft-search eligibility checker. Using one lets you see how likely you are to be accepted without leaving a mark on your credit file. A full application triggers a hard search, which is recorded and may affect your credit score temporarily.
The credit limit. You will not know your exact credit limit until you apply and are approved. If the limit offered is lower than the balance you want to transfer, you can only move part of the debt. The rest remains on the old card, still accruing interest.
Minimum monthly payments. Even during the 0% period, a minimum monthly payment is required. Missing payments can void the promotional rate, and the lender may revert the balance to the standard rate immediately.
Whether you plan to spend on the card. Balance transfer cards are not always ideal for everyday spending. New purchases may attract a higher rate from day one. Under FCA payment allocation rules (CONC 6.7), payments are applied to the cheapest portion of the debt first, which can mean new spending sits accruing interest even while you pay down the transferred balance.
When a balance transfer may be worth considering
A balance transfer card can reduce the total interest paid on existing credit card debt, provided the transfer fee is lower than the interest you would otherwise pay, and you clear or significantly reduce the balance before the 0% period ends.
To make that concrete: if you have a £2,000 balance on a card charging 22% APR, you could be paying over £400 in interest over a year. Moving that balance to a 0% card with a 3% transfer fee would cost £60 upfront. If you clear the balance within the 0% window, the saving could be substantial, though the exact figures depend on your repayment pace and the specific rates involved.
A balance transfer may be worth considering if you have a manageable balance, a clear repayment plan, and a credit profile that is likely to get you accepted for a card with a meaningful 0% period. For a broader look at how balance transfer cards sit alongside other types of credit card, it can help to read our guide to credit cards first.
It is less likely to help if you are only making minimum payments and have no plan to clear the debt, or if you continue to add new spending to the card.
Sources
- MoneyHelper: guidance on balance transfer credit cards
- FCA: Consumer Credit sourcebook (CONC), including payment allocation rules
- What is a balance transfer fee?
A balance transfer fee is a one-off charge, typically expressed as a percentage of the amount you move. For example, a 3% fee on a £2,000 transfer costs £60. The fee is usually added to your balance on the new card. Some cards advertise a 0% fee, though these deals tend to come with a shorter interest-free period.
- What happens when the 0% period ends?
When the introductory period expires, any remaining balance starts attracting the card's standard purchase or revert rate, which can be substantially higher. It is worth noting the end date in your calendar well in advance so you have time to clear the balance or consider switching again before interest starts.
- Does a balance transfer affect my credit score?
Applying for a new card involves a hard credit search, which is recorded on your credit file and can cause a small, temporary dip in your credit score. Opening a new account also changes your overall credit profile. The effect is generally short-lived if you keep up with payments and do not miss any.
- Can I transfer a balance from a store card or overdraft?
Balance transfer cards are primarily designed for moving credit card debt. Some providers accept store card balances. Overdraft transfers are less commonly supported and depend on the specific card. It is worth checking the card's terms directly or using an eligibility checker before applying.
- Can I spend on a balance transfer card?
Many balance transfer cards charge a different, higher rate on new purchases from day one. If you spend on the card as well as transferring a balance, payments may be allocated to the cheapest debt first under FCA rules, meaning your new purchases could sit accruing interest for longer.
- What if I am accepted for a lower credit limit than expected?
Lenders set limits based on their own affordability and credit assessments. If you receive a lower limit than the balance you wanted to transfer, you may only be able to move part of your debt. The remainder stays on the old card and continues to accrue interest there.