How Do Balance Transfers Work? A Plain-English UK Guide
If you're paying interest on a credit card or store card, a balance transfer can give you breathing space. You move what you owe to a new card that charges a low or 0% interest rate for a set time, so more of each payment goes towards clearing the debt itself.
It's a genuinely useful tool, but only if you understand the fees, the time limits and the small print. This guide walks you through it.
Key takeaways
- A balance transfer moves debt from one card to another, usually to get 0% or low interest for a set period.
- Most cards charge a one-off transfer fee, a percentage of the amount you move. MoneyHelper says this is often around 2–4%.
- You usually can't transfer between cards from the same bank or banking group.
- Always make at least the minimum payment on time, or you could lose the 0% deal.
- Plan to clear the balance before the offer ends, when the standard rate kicks in.
This is general information, not financial advice.
What is a balance transfer?
A balance transfer is when your new credit card provider pays off some or all of the balance on your old card. The debt then sits on the new card instead, under the new card's terms.
Balance transfer cards usually come with an introductory period, often quoted in months, when the transferred balance is charged at 0% or a low rate. Once that period ends, any balance left starts being charged at the card's standard interest rate, which is usually much higher.
You still owe exactly the same amount (plus any fee). What changes is how much interest you pay while you clear it.
How a balance transfer works, step by step
1. Check what you owe and what it's costing you
Look at your current statement. Note the balance, the interest rate, and how much interest you paid last month. This is your baseline, the cost you're trying to beat.
2. Check your eligibility before applying
Many providers and comparison tools let you check your chances of being accepted using a soft search, which lenders can't see and which doesn't affect your credit score. A full application leaves a hard search on your file. See our guide on Does Applying for a Credit Card Affect Your Credit Score?
3. Apply and request the transfer
You'll usually give the new provider your old card number and the amount you want to move. Some providers do this during the application; others ask you to request it after the card arrives.
4. Transfer within the deadline
Most 0% balance transfer offers only apply to transfers made within a set window after opening the account, often a few months at most. Transfers made later may get a different (higher) rate or fee. Check the card's summary box.
5. Keep paying your old card until the transfer completes
Transfers can take several working days. Don't miss a payment on your old card while you wait.
6. Pay off the debt before the offer ends
Divide what you owe by the number of 0% months to get a monthly target. Setting up a direct debit for that amount (not just the minimum) is one of the simplest ways to stay on track.
How much does a balance transfer cost?
The balance transfer fee
Most balance transfer cards charge a one-off fee worked out as a percentage of the amount transferred. MoneyHelper notes that this is often around 2–4%, and the fee is added to your balance. A few cards charge no fee, but these often come with a shorter 0% period.
Worked example (illustrative only): move £2,000 to a card with a 3% fee, and £60 is added, so your new balance is £2,060. If you'd otherwise pay much more than £60 in interest over the same period, the transfer saves you money.
Longer 0% vs lower fee
There's usually a trade-off:
- Longer 0% period, higher fee. Better if you need more time to pay off a larger balance.
- Shorter 0% period, lower or no fee. Better if you can clear the debt quickly.
Work out how many months you realistically need, then compare the total cost.
The rate after the 0% ends
Check the standard interest rate (and APR) the card reverts to. If you think you might not clear everything in time, a card with a lower standard rate could matter more than a slightly longer 0% period. See APR vs Representative APR: What Credit Card Rates Really Mean.
What you usually can't do
Transfer between cards from the same banking group
Providers generally won't accept transfers from cards they, or a sister brand, issued. Several UK brands share a parent company, so check the exclusions list in the card's terms before you apply. You can browse providers on our banks & issuers pages.
Expect a limit equal to your debt
Your credit limit is set after you apply, and you may not be able to transfer everything. Some providers also cap transfers at a percentage of your limit. If you can only move part of the balance, consider moving the most expensive debt first.
Spend on the card at 0%
On many balance transfer cards, new purchases are charged at the standard rate, not 0%. If you need both, look at combined deals on our 0% purchase credit cards and Balance transfer credit cards pages and read the terms carefully.
Withdraw cash
Cash withdrawals on a credit card usually come with a fee and interest charged from the day you take the money out. Avoid them on a balance transfer card.
How to avoid losing your 0% deal
The terms of most promotional offers say the deal can be withdrawn if you:
- miss a monthly payment or pay late
- go over your credit limit.
Set up a direct debit for at least the minimum payment as a safety net, and pay extra on top whenever you can.
Is a balance transfer right for you?
A balance transfer tends to work best if:
- you have a clear plan to repay the debt within the 0% period
- your credit history is in reasonable shape, as the best offers usually go to applicants with stronger credit files
- you won't keep spending on the old card once it's cleared.
It may not be the right step if you're already struggling to keep up with repayments. In that case, it's worth speaking to a free, impartial debt advice service. MoneyHelper can point you to one. The FCA's persistent debt rules also mean your card provider must contact you if, over 18 months, you've paid more in interest, fees and charges than you've paid off the actual balance, and offer help.
What happens when the 0% period ends?
Any remaining balance is charged at the card's standard rate. Your options then include:
- paying the rest off as fast as you can
- applying for another balance transfer card, although there's no guarantee you'll be accepted, and a new fee will usually apply
- speaking to your provider about other options if you're struggling.
Put a reminder in your calendar a couple of months before the deal ends so it doesn't creep up on you.
Compare balance transfer cards
When you're ready, our Balance transfer credit cards page lists UK balance transfer cards in the same format: 0% length, transfer fee, and the rate afterwards, side by side.
Frequently asked questions
Does a balance transfer affect my credit score?
Applying for a new card leaves a hard search on your credit file, which can have a small, temporary effect. Over time, paying down your debt and making payments on time can help your credit history. Checking eligibility first with a soft search doesn't affect your score.
Can I transfer a balance to a card from the same bank?
Usually not. Most providers exclude cards issued by themselves or by other brands in the same banking group. Check the card's terms before applying.
How long does a balance transfer take?
It varies by provider, but it typically takes several working days. Keep paying your old card until you can see the balance has been cleared.
Is it worth paying a balance transfer fee?
It can be, if the interest you'd save is more than the fee. Compare the fee with what you'd pay in interest on your current card over the same period.
Can I transfer a store card or overdraft?
Many balance transfer cards accept store card balances. Moving an overdraft or money into your bank account is a different product (a "money transfer") and usually costs more.
Should I close my old card after the transfer?
Not necessarily. Keeping an old, unused card open can help your credit utilisation, but if you'd be tempted to spend on it, closing it may be the safer choice.
This is general information, not financial advice. Rates, fees and terms change, so always check the provider's summary box before you apply. If you're worried about debt, MoneyHelper offers free, impartial guidance.
