How do you do a credit card balance transfer?

To do a balance transfer: apply for a balance-transfer card with a 0% intro APR period, provide the account numbers and amounts you want transferred, wait 7–14 days for the transfer to process, and continue paying the old card until the transfer confirms. Pay off the transferred balance before the 0% period ends to avoid interest.

A balance transfer moves an existing credit card balance — typically high-interest debt — onto a new card that offers a lower or promotional 0% APR for a set period. When executed correctly, it can save hundreds of dollars in interest. The key variables are the transfer fee (usually 3–5% of the amount transferred) and the length of the promotional period.

Step-by-step: how to do a balance transfer

Choose the right card. Look for a card with a long 0% intro APR period (15–21 months is common), a low balance transfer fee (some cards offer 0% fee for a limited window), and a credit limit sufficient to cover your transfer amount.
Apply for the new card. Most issuers let you request the balance transfer during the application. You'll need the account numbers and current balances of the cards you want to transfer from. Note: most issuers will not allow a balance transfer between two cards from the same bank.
Wait for the transfer to process. Transfers typically take 7–14 days. During this window, continue making minimum payments on your old card to avoid a late payment. A missed payment during the transfer window can trigger the penalty APR on the old card.
Verify the transfer completed. Confirm the balance appears on the new card and that the old card shows a zero (or reduced) balance. Do not close the old card immediately — keeping it open maintains your available credit.
Pay down the new card before the promotional period ends. Divide the transferred balance by the number of months in the promo period to calculate your required monthly payment. Any remaining balance after the promo period reverts to the regular APR — often 20%+.

The real cost: calculating whether a transfer makes sense

Balance transfer math

You have $5,000 at 24% APR. Minimum payments will cost roughly $1,500 in interest over 3 years. A 0% balance transfer card with a 3% fee costs $150 upfront. If you pay off the $5,150 in 18 months, total interest = $0. Net savings: ~$1,350. The math favors the transfer if — and only if — you can pay off the balance before the promo period ends.

Common balance transfer mistakes

Using the old card again — restocking the old card while carrying the new balance doubles your debt load.
Missing a payment on the new card — a single late payment often cancels the 0% promo APR immediately.
Not accounting for new purchases — many cards apply payments to the lowest-APR balance first, leaving new purchases to accrue interest.
Transferring more than you can pay off — if the balance won't be gone by the end of the promo period, project what interest you'd pay on the residual.

What regulators and issuers say

The CFPB explains that a balance transfer moves debt from one card to another and typically involves a fee of 3–5% of the amount transferred. — CFPB — Balance Transfers
Under the Credit CARD Act, issuers must apply any payment above the minimum to the highest-APR balance first — however, new purchases on a balance-transfer card may still accrue interest at the regular rate. — CFPB — Credit CARD Act Protections
The FTC notes that consumers should read the fine print on balance transfer offers carefully, including the end date of the promotional period and whether the fee is charged upfront. — FTC — Credit Card Balance Transfers

Key takeaways

Apply for a 0% balance-transfer card, provide the account details, and the issuer handles the transfer in 7–14 days.
Keep paying the old card until the transfer confirms — never assume it went through until you see it.
The balance transfer fee (usually 3–5%) is upfront; weigh it against the interest you'll save.
Divide the transferred balance by the promo months to find your required monthly payment.
One late payment on the new card can void the 0% promo — set up autopay immediately.

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