Balance transfer minimum payment: why it is not enough

On a 0% balance transfer card the minimum payment is roughly 1% of what is owed. On a $5,150 balance that is about $52 a month. Paying it every month for the length of an 18-month promotion clears less than a fifth of the debt, and the rest starts accruing at the go-to rate the month the promotion ends. The calculator above shows both numbers side by side: the minimum the issuer will accept, and the payment that actually finishes the job in time.

How issuers calculate the minimum

The CFPB reviewed credit card agreements in 2025 and found a consistent structure. Most issuers set the minimum as a percentage of the cycle-ending statement balance, usually 1%, then add the billed interest, fees and any past due amounts, and compare the result against a fixed dollar floor. Whichever is larger is the minimum due. Floors ranged from $15 to $50 across the agreements reviewed, with $40 the most common, up $15 since 2015.

Written out, the common formula is: past due amounts, plus any special payment obligations, plus the greater of $40 or 1% of the new balance plus billed interest and late fees, capped at the total owed.

Chase’s cardmember agreement follows exactly that shape with a $40 floor. Citi uses the same structure with a $41 floor and an adjusted new balance. Some issuers instead use a flat percentage of the whole balance, typically 2% to 4%, with a lower floor around $25 to $35. A flat 2% or 3% produces a larger minimum than the 1%-plus-costs approach on a 0% balance, which is worth checking on the card’s own terms rather than assuming.

Separately, Regulation Z requires every statement to carry a minimum payment warning showing how long the balance would take to clear at the minimum, and what a 36-month payoff would cost instead. It is the most useful number on the statement and the least read.

Why the 0% minimum is small, and why that is the trap

The interest component is what makes minimum payments large on an ordinary card. Take $5,000 at 22.15%, the Federal Reserve’s Q2 2026 average rate on accounts assessed interest. Billed interest for the month is about $92, so the minimum is roughly $50 of principal plus $92 of interest, about $142. Most of that payment does nothing but stand still.

Move the same balance to a 0% card and the interest component disappears. The minimum drops to about 1% of the balance and nothing else. That looks like relief. It is arithmetically the opposite: at 1% of a declining balance, the debt takes something like eight to ten years to clear, while the promotional protection lasts 15 months. The payment got smaller because the interest stopped, not because the debt did, and the clock is now running.

This is the single most common way a balance transfer ends badly. Roughly half of promotional balances are not cleared by the end of the promotional period, and a balance still outstanding at expiry starts accruing at the go-to rate, which in this market runs from about 17% to 30%. What happens after the 0% ends covers the tail.

The worked example

$5,000 transferred with a 3% fee, so $5,150 on the new card at 0% for 18 months.

Paying the minimum. Month one: 1% of $5,150 is $51.50, and with no billed interest the minimum is about $52, above the $40 floor. Repeat this for 18 months with the minimum falling as the balance falls and roughly $875 has been paid. About $4,275 is still outstanding on the day the promotion ends. From month 19 that balance accrues at the go-to rate. At 22.15% the first month’s interest alone is about $79, which is more than the entire minimum payment made in month one.

Paying to clear it. The 14-day posting lag leaves 17 effective months, and $5,150 divided by 17 is $302.94. That figure, paid every month, ends the debt on the promotional deadline with $0 of interest ever charged and $150 in fees as the total cost of the exercise.

The gap between $52 and $286 is the whole decision. The calculator above computes the second number from the balance, fee and promotional length, and shows what remains at the promotional end date under any payment in between.

The payment allocation rule

Two different rules govern where money goes on a card carrying more than one balance, and they point in opposite directions.

Under 12 CFR 1026.53, any payment above the required minimum must be applied first to the balance with the highest APR, then to the rest in descending order. This is a consumer protection and it works. Money paid above the minimum goes where it does the most good.

The minimum itself is not covered by that rule. The official interpretation says plainly that the section does not address how the required minimum payment is allocated, and in practice issuers apply it to the lowest-rate balance first. Chase’s agreement applies the minimum to the lowest-APR balance after certain plan obligations. Citi’s applies it to the lowest-APR balance first. U.S. Bank does the same.

The consequence on a balance transfer card is specific and unpleasant. If purchases are made on the same card at a normal purchase rate, the minimum payment is applied to the 0% transferred balance, while the purchase balance keeps accruing daily. Only money above the minimum touches the expensive balance. And carrying a transferred balance generally means losing the grace period on new purchases, so those purchases accrue from the transaction date rather than from the statement.

The practical rule that falls out of this is to make no purchases on the balance transfer card until the transferred balance is gone. It is covered further in common mistakes.

A transfer is not a payment

A balance transfer does not satisfy the old card’s minimum payment due. It becomes a payment to that account when it posts, which typically takes one to three weeks, and the due date in between still stands. Chase’s guidance is to keep paying the old account until the transferred amount has posted and the balance has been paid, and every other issuer says a version of the same thing. How long a transfer takes sets out the timings.

Two follow-on points. The old card’s final statement will usually carry trailing interest accrued up to the posting date, which is a real amount owed on an account that reads zero. And a payment more than 60 days late is the one circumstance under Regulation Z that lets an issuer end a promotional rate early, so the minimums on both cards matter during the changeover more than at any other time.

What the number should be

The arithmetic is not complicated. Take the balance plus the fee, divide by the number of promotional months remaining after allowing for the posting lag, and treat the result as the real minimum. If that figure is not affordable, the transfer is still likely to help, but it should be evaluated on what happens after the promotion rather than on the promotional period alone, and a fixed-rate alternative may compare better. Whether a transfer is worth it works through that comparison with the post-promotional tail included.