Balance-transfer offers: calculate the fee and the payoff deadline

The three numbers that decide it

A 0% headline leaves out the cost of moving the debt. The CFPB confirms a card issuer is permitted to charge a balance-transfer fee on a zero-percent offer. Before applying, find three numbers in the offer terms: the fee (a percentage, and any minimum dollar amount), the promotion end date, and the rate that applies afterward. [1]

Then calculate one more: the monthly payment that clears the balance plus fee before the end date. If you cannot afford that payment, the transfer only delays the problem. This is general US consumer education based on CFPB material read on 29 October 2026; the examples use invented figures, not a real card offer.

Required monthly payment by fee and promotion length

Invented $4,000 transfer, fee added to the balance, no new purchases, no interest during the promotion. Required payment equals (balance plus fee) divided by months.

Worked example: transfer versus staying put

Stay put: $4,000 on a card at a 24% APR, modeled as 2% interest a month, paying $343.33 monthly. After 12 payments about $468 is still owed and about $588 has gone to interest. Transfer: the same payment on a 3% fee, 12-month 0% offer clears the $4,120 in 12 months. The transfer is roughly $468 ahead ($588 interest avoided minus the $120 fee). This simplified model ignores daily interest and minimum-payment rules.

Now assume you can only pay $300 a month on the transfer. Twelve payments total $3,600, leaving $520 when the promotion ends, which will then be charged the post-promotion rate. That leftover is the number to plan for, not the 0% headline.

Rules that change the math

New purchases: if you carry a balance from month to month, the CFPB says purchases accrue interest from the date of the transaction, even when the transferred balance is at 0%. You keep purchase interest-free only by paying the entire balance, including the transferred amount, by the due date. The simplest plan is to not use the new card for purchases until the transfer is paid off. [2]

Payment allocation: under Regulation Z, an issuer must apply any amount you pay above the minimum to the highest-APR balance first. If you do make purchases, extra payments generally go to those higher-rate purchases before the 0% balance, which can leave more of the transfer outstanding when the promotion ends. [3]

Losing the rate: Regulation Z generally allows a promotional rate to end only after a stated period of six months or longer, but an issuer may raise the rate if it does not receive your minimum payment within 60 days after the due date. Set up an automatic minimum payment as a floor. [4]

Checklist before you apply

• Fee percentage and any minimum fee, and whether the fee is added to the balance.
• Deadline to request the transfer for it to qualify (often different from the promotion end date).
• Exact promotion end date and the rate afterward.
• Transfer limit and any accounts you are not allowed to transfer from.
• Required monthly payment from the table method above, checked against your budget.
• Keep paying the old card until it shows the transfer received.
• A plan to stop adding new debt; a transfer moves the balance without changing what created it.