The concept is simple. The execution has a two-week gap in the middle where most of the problems happen.
Requesting the transfer
You can usually request a transfer during the application for the new card, or afterward through the issuer's app or by phone. You provide the old card's account number and the amount you want moved.
Requesting during the application is faster but riskier: you do not yet know your credit limit, and a request for more than the limit allows may be reduced or declined. Requesting afterward, once you know the limit, gives you a cleaner picture.
Either way, stay inside the offer's transfer window — commonly 60 to 120 days from account opening. Transfers requested after it get the standard APR, not the promotion.
The transfer limit
You can move up to your available credit on the new card, and the transfer fee counts against it. On a $5,000 limit with a 3% fee, the maximum transferable balance is about $4,854 — the fee consumes the rest.
Issuers also frequently cap transfers at a percentage of the limit rather than allowing the full amount. If you have a large balance, request the transfer as soon as the account opens so you know what actually moved.
The waiting period
Completion typically takes one to three weeks. Some issuers are faster; mailed payments to the old issuer are slower.
After it posts
Four things to check:
- The old account balance is zero. If a small amount remains, pay it — residual interest accrued between the transfer request and the payment posting is common.
- The new card shows the transferred amount plus the fee, at the promotional rate.
- The promotional end date, which should be visible in the account.
- Any recurring charges still attached to the old card, which should be moved.
That first point is where accounts go delinquent over four dollars. Set the old card to autopay the statement balance for one more cycle rather than assuming zero means zero.
What to do with the old card
Do not close it, at least not immediately. Closing removes its credit limit from your utilization calculation right when your utilization is at its most sensitive.
If the card tempts you into spending, remove it from digital wallets and stored payment methods and put the physical card somewhere inconvenient. Keeping the account open costs nothing if there is no annual fee.
The payment plan
Divide the new balance, including the fee, by the number of promotional months. Pay that amount every month by standing order. Do not pay the minimum — on a 0% balance, the minimum is calculated to leave a substantial amount outstanding when the promotion ends.
One caution on payment allocation: if you also make purchases on the transfer card, payments above the minimum go to the highest-APR balance first, which will be the purchase balance rather than the 0% transfer. That is fine in principle, but it means the transfer balance shrinks more slowly than your payments suggest. Not using the card for purchases avoids the complication entirely.
