How Credit Card Balance Transfers Work
Balance transfers explained: how a 0% intro APR works, the 3-5% transfer fee, when it saves money, and how to pay the balance off in time.
Last updated: 2026-07-25
A balance transfer moves an existing credit-card balance onto a new card that offers a low or 0% introductory APR for a set window — often 12 to 21 months. During that window, none or almost none of your payment goes to interest, so the debt shrinks far faster.
The transfer fee, and when it is worth it
Most transfers charge an upfront fee of 3% to 5% of the amount moved — $150 on a $5,000 balance at 3%. The transfer pays off when the interest you avoid during the 0% period is larger than that fee, which is almost always true if you were carrying a balance at 20%-plus APR.
How to use one well
- Divide the balance by the number of 0% months and aim to pay that much each month, so it clears before the intro rate ends.
- Avoid new purchases on the card — they may not get the 0% rate and can complicate how payments are applied.
- Do not miss a payment; a late payment can void the promotional rate entirely.
The catch to watch
When the intro period ends, the standard APR applies to whatever is left — so the goal is to clear the balance before then. Opening a new card can also nudge your credit score in the short term, though lowering your overall utilization usually helps it over time.
Compare the fee against the interest saved, and plan your payoff, with the calculators below.