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 would 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 do not 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 - compare it against the interest you would pay staying on your current card. Usually it is significantly less.

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. Do not use your balance transfer card for everyday spending. 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 does not necessarily exclude you - there are 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

1

Check your eligibility first

Use eligibility checkers to find cards you are 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.

2

Apply and get approved

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

3

Confirm the old card is cleared

Keep checking your old card until it shows a zero balance, then close it (or cut it up) to remove temptation. Do not assume the transfer went through without checking.

4

Divide the balance by the 0% months

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

5

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.

6

Set a reminder 2 months before the 0% period ends

If there is any remaining balance, consider whether to transfer again to a new 0% card or clear the rest. Do not 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.
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 longer-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 is usually small compared to the financial benefit of paying less interest.
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. Do not just let it revert to 22-30% and pay only minimums - 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.