How does a 0% balance transfer credit card work?

A 0% balance transfer card lets you move existing credit card debt to a new card that charges 0% interest for a promotional period — typically 12–29 months in the UK. During this period, every penny of your monthly payment reduces the actual debt rather than paying interest. A balance transfer fee (typically 1–3% of the transferred amount) is charged upfront. Used correctly, a balance transfer can save hundreds or thousands of pounds in interest and accelerate debt clearance significantly.

What is the best balance transfer card UK 2025?

The best balance transfer card depends on your credit score and how long you need to pay off the debt. Cards offering 20–29 months at 0% are available to those with good to excellent credit, typically with a 2–3% transfer fee. Shorter 0% periods (12–18 months) are available at lower fees or sometimes fee-free. Compare the total transfer fee against how much interest you'd pay if you stayed on your current card. Always check your eligibility before applying to avoid unnecessary hard searches.

Can you balance transfer to the same bank?

No — you cannot transfer a balance between cards from the same bank or financial group. For example, you cannot transfer a Barclaycard balance to another Barclaycard. The transfer must be between cards from different providers. If you want to move debt from a Barclays card, you'd need to apply for a balance transfer card from a different bank (MBNA, Lloyds, Halifax, Virgin Money, etc.).

Balance Transfer Cards -

How Balance Transfer Cards Work

When you get a 0% balance transfer card, you apply and — if approved — move (transfer) your existing credit card debt to the new card. The new card pays off your old card and takes on the balance. For the 0% promotional period, no interest is charged on the transferred balance. This means every monthly payment reduces the principal, not interest.

Example: £3,000 on a card at 22.9% APR costs approximately £57/month in interest alone. Transfer it to a 20-month 0% card (2% transfer fee = £60 upfront) and pay £150/month — you'd clear the debt in 20 months having paid just £60 in total charges rather than over £1,000 in interest.

The 0% transfer window is temporary. If you don't clear the balance before the promotional period ends, the remaining balance reverts to the card's standard APR — often 22–30%. The entire strategy depends on clearing as much as possible (ideally all) during the interest-free window.

Costs to Know Before You Apply

Main cost

Balance Transfer Fee

Typically 1–3.5% of the transferred balance, charged upfront. On £5,000, a 3% fee = £150. This is a one-time cost — calculate whether it's less than the interest you'd pay staying on your current card. Usually it is, often significantly.

Watch out

Revert Rate

The standard APR that kicks in after the 0% period ends — typically 22–30%. Any remaining balance is charged this rate from day one of the revert period. Set a calendar reminder 2 months before the 0% period ends.

Common trap

New Purchases APR

0% balance transfer cards usually charge full interest on new purchases immediately. Don't use your balance transfer card for everyday spending — use a separate card, or cash. Mixing purchases with a transferred balance is a common and expensive mistake.

Critical

Minimum Payment Trap

Always pay more than the minimum — ideally enough to clear the balance before the 0% period ends. Missing the minimum payment on many balance transfer cards immediately cancels the 0% deal and reverts the entire balance to the standard rate.

Who Qualifies for a Balance Transfer Card?

The best 0% balance transfer deals (20+ months, low fees) require a good to excellent credit score. A poor credit history doesn't necessarily exclude you — there are balance transfer options for lower credit scores, though with shorter 0% periods and higher fees.

Good/excellent credit: Access to 20–29 month 0% deals, 1.5–3% transfer fees
Fair credit: Shorter 0% periods (6–15 months), may face higher fees
Poor credit: May be offered a card with low limit and short 0% period, or declined

Always use an eligibility checker (soft search) before applying — comparison sites like MoneySavingExpert, Compare the Market, and MoneySuperMarket offer these. They show your approval likelihood without affecting your credit score.

How to Use a Balance Transfer Card: Step by Step

Check your eligibility first

Use eligibility checkers to find cards you're likely to be approved for. Multiple hard searches in a short period hurt your score — do soft checks first, then apply to just one card.

Apply and get approved

Once approved, tell the new card provider which balances to transfer. You'll need the old card account number and balance. Transfers usually complete within 3–7 working days.

Check the old card is cleared

Don't assume the transfer went through. Keep checking your old card until it shows a zero balance, then close it (or cut it up) to remove temptation.

Divide the balance by the 0% months

If you've transferred £3,600 to a 24-month 0% card, set a Direct Debit for £150/month (£3,600 ÷ 24). This guarantees the balance is cleared before the 0% period ends — assuming you make no new purchases on the card.

Never use the card for new purchases

Keep a separate card for day-to-day spending. New purchases on a balance transfer card typically accrue interest immediately at the full rate, and payments are often allocated to the 0% balance first — leaving the interest-bearing purchases to grow.

Set a reminder 2 months before the 0% period ends

If there's any remaining balance, consider whether to transfer again to a new 0% card or clear the rest. Don't let the balance sit at the high revert rate unnecessarily.

Frequently Asked Questions

Yes — you can transfer balances from multiple cards to one balance transfer card (usually up to your new credit limit). You can also do successive transfers when a 0% period ends — apply for a new balance transfer card and move the remaining balance again, though each new application involves a hard search and depends on your credit score at the time. This 'surfing' strategy can work to maintain 0% indefinitely, but becomes harder if your circumstances change.

Opening a new credit card and performing a balance transfer typically has a short-term negative impact — one hard search (5–20 point drop) and a new account (reduces average account age). However, the long-term effect is often positive: your old card is cleared (improving utilisation), and you build a positive payment history on the new card. The credit score impact of the transfer itself is usually small compared to the financial benefit of paying less interest.

If you're approaching the end of your 0% period with a remaining balance, you have three options: (1) Apply for a new balance transfer card and move the remaining balance — this works if your credit score is still good. (2) Negotiate a hardship plan or lower rate with your current provider. (3) Consider a debt consolidation personal loan at a fixed lower rate. Don't just let it revert to 22–30% and pay minimum payments — the interest compounds quickly.

Important: Balance transfer cards involve credit applications that affect your credit score. Always check eligibility before applying. Card terms change — verify current offers directly with providers. Not financial advice.

Balance Transfer Credit Cards:Complete UK Guide 2025