Balance transfer calculator
A 0% balance transfer moves card debt to a new card that charges no interest for a set period, for a one-off transfer fee. Enter your balance, the fee, the 0% months and your monthly payment to see the fee, how long the debt takes to clear, any interest once the 0% ends, and the total cost.
A one-off fee, usually 1% to 4% of the balance, added to the transferred amount.
How many months the new card charges no interest.
The APR once the promotional period finishes.
Indicative planning estimate from the figures you enter, not advice, a quote, or a credit decision. Reviewed July 2026.
Balance over the 0% period and after
Watch this payoff date move as you pay down
Track all your debts, income and net worth free. No card required.
Worked example
For a £5,000 balance at 2.9% APR, the time to clear is 18 mo. Transfer fee: £145. Interest after the 0% ends: £0. Total cost (fee plus interest): £145.
How it works
- A balance transfer moves your existing card debt onto a new card that charges 0% interest for a set number of months.
- You pay a one-off transfer fee, usually 1% to 4% of the balance, which is added to the amount you owe on the new card.
- During the 0% period every pound you pay reduces the balance, because no interest is added, so it is the fastest time to clear debt.
- If a balance is left when the 0% ends, the card reverts to a standard APR, so the aim is to clear it, or transfer again, before that happens.
Frequently asked questions
Is a balance transfer worth the fee?
Usually yes if you are paying interest now and can clear most or all of the balance during the 0% period. The one-off fee is typically far less than the interest you would pay on a standard card over the same time. This calculator shows the fee and any post-promotion interest so you can weigh it up against staying put.
What happens when the 0% period ends?
Any remaining balance starts attracting the standard APR shown here, which is often similar to a normal purchase card. The goal is to clear the balance within the 0% window; if you cannot, some people transfer the remaining balance to another 0% card, though a new fee and a successful application apply.
Does the transfer fee get added to my balance?
Typically yes, the fee is added to the amount transferred, so you owe slightly more than you moved across. This calculator adds the fee to the balance and pays it down along with the rest, which is how most cards work.
Is this financial advice?
No. It is an indicative planning estimate from the figures you enter, not advice, a quote, or a credit decision. Transfer offers, fees and revert rates vary by card and by applicant, and a transfer needs a successful application.
This calculator gives an indicative planning estimate from the figures you enter. It is not advice, a quote, or a credit decision. CoreFi is a trading name of JG Core Ltd (company 16218779). Figures reviewed July 2026.