Balance transfer fee explained
Last updated: 2026-08-14
Move $5,000 to a card offering 0% for 18 months and you pay a transfer fee, typically 3%. That is $150 charged immediately, and your balance starts at $5,150 rather than $5,000.
In exchange, staying on the old card at 22% would cost roughly $900 in interest over those 18 months. The fee is worth paying — provided you clear the balance before the promotional rate expires.
The arithmetic
| 18 months on $5,000 | Stay at 22% | Transfer at 0% |
|---|---|---|
| Upfront fee | $0 | $150 |
| Interest charged | ≈$900 | $0 |
| Monthly to clear | ≈$330 | ≈$286 |
| Total cost | ≈$900 | $150 |
To clear $5,150 across 18 months you need about $286 a month. That figure is the whole decision: if you cannot commit to it, the promotional period will expire with a balance still on the card.
What happens when the promo ends
The post-promotional rate applies to whatever remains, and it is often no better than the card you left. Transfer $5,000, pay $150 for the privilege, clear only half, and you finish the promotional period owing around $2,575 at a rate similar to where you started — having paid a fee for the delay.
Work out the monthly payment that clears the balance inside the window before transferring, not after. The offer is a deadline, not a discount.
Details that change the answer
The fee is charged on the amount transferred, not the amount you clear. Transferring more than you can realistically pay off means paying 3% on the excess for nothing.
New purchases usually are not covered. The 0% rate typically applies only to the transferred balance. Spending on the new card can attract standard interest immediately, and payments are often applied to the promotional balance first, leaving the expensive part outstanding.
Some offers have no fee at all. They exist, usually with shorter promotional windows. Compare the fee against the length of the window, not in isolation.
The old card stays open. That is generally good for your credit utilization, but only if it stays unused.
Test the offer against your balance
The balance transfer calculator compares the current card against the transfer including the fee, the promotional window, and the post-promo rate. The credit card payoff calculator shows what clearing it in time actually requires each month.
Related reading: how to pay off credit card debt.
When the fee pays for itself
A transfer fee is worth paying when the interest it avoids exceeds the fee. That depends on the balance, the rate you are leaving and how quickly you clear it.
| Cleared within | Interest avoided | Fee | Net saving |
|---|---|---|---|
| 6 months | $782 | $240 | +$542 |
| 12 months | $1,463 | $240 | +$1,223 |
| 18 months | $2,046 | $240 | +$1,806 |
| Not cleared | Reverts to standard rate | $240 | Fee wasted |
The final row is the one that matters. A transfer that outlives its promotional window usually costs more than staying put, because revert rates on transfer cards are often higher than the card you left.
Common questions
Is a three per cent fee worth paying?
It is if the interest avoided exceeds the fee. On a balance carrying a high rate for a year or more, a three per cent one-off charge is usually far cheaper than the interest.
What happens when the promotion ends?
The remaining balance reverts to the standard rate, which is often higher than the card you left. A transfer only helps if you clear it, or nearly clear it, within the window.
Do new purchases get the promotional rate?
Frequently not. Purchases can accrue at the standard rate while payments are applied to the promotional balance first, so spending on a transfer card can quietly cost more than expected.
Does a transfer hurt my credit score?
The application produces a hard inquiry and a new account, both small short-term negatives. The larger effect is usually positive, because available credit rises and utilisation falls.
Related reading
The rest of this series, and the calculators that let you run the idea on your own numbers.
More debt payoff guides
Try it with your figures
See also all guides, every calculator, and the calculation methodology behind these estimates.