Is a balance transfer fee worth paying?

A balance transfer fee is worth paying when it is smaller than the interest you would otherwise pay over the time it takes you to clear the debt, and when you can actually clear it before the 0% rate ends. Move $6,000 from a card charging 22% to a 12-month 0% offer with a 3% fee, pay it off on schedule, and you pay a $180 fee instead of $738.80 in interest, a net saving of $558.80. The fee loses when you could pay the debt off within a couple of months anyway, or when much of the balance is still there when the promotion expires.

The core calculation, done month by month

The fee is a one-time charge, usually a percentage of the amount you move; the CFPB notes that some issuers charge 3 to 5 percent. It is added to the new card’s balance, so $6,000 transferred with a 3% fee becomes $6,180.

The interest side is where quick estimates go wrong. On $6,000 at an APR of 22%, the first month’s interest is $110, and it is tempting to multiply that by 12 and call the saving $1,320. But if you are paying the balance off, the interest shrinks every month along with the balance. Paying $6,000 off in 12 equal payments at 22% takes $561.57 a month and costs $738.80 in interest in total. The shortcut overstates it by about 79%.

At either fee the transfer wins, by $558.80 or $438.80. If the new card charges an annual fee, add it to the fee: a $95 annual fee on top of the $180 makes the cost $275.

To test an offer, enter the balance, your current APR, the fee, the promotional months and the payment you will make. The calculator holds the payment the same on both cards, so with the example’s numbers and a $515 payment it shows a bigger saving, $618.73, because at that payment the old card would still have a balance after 12 months.

When the fee costs more than it saves

The fee is paid up front; the interest you avoid builds up month by month. So the shorter your payoff, the worse the fee looks. If you could pay the same $6,000 off in two months, the interest on the old card would be only $165.50. A 3% fee of $180 would cost you $14.50 more than staying put, and a 5% fee would cost $134.50 more.

At an APR of 22%, the break-even points are easy to remember. A 3% fee pays off once your payoff would take three months or more, and a 5% fee once it would take five months or more. A higher current rate shortens those times; a lower one stretches them. A transfer can also take a while to post, and the CFPB’s credit card guide advises paying at least the minimum on the old card until it does.

A true 0% intro APR is not deferred interest

Two offers can both say “no interest” and work very differently. The CFPB draws the line this way:

• 0% intro APR (“0% intro APR on purchases for 12 months”): no interest accrues during the promotion. If a balance remains when it ends, interest starts on that remaining balance from that date forward.
• Deferred interest (“No interest if paid in full within 12 months”): interest is calculated from the start and held in the background. Pay the full promotional balance by the deadline and it disappears; leave any amount unpaid and all of it is added, back to the purchase date.

Deferred interest shows up mainly on store cards and retail financing; whatever the card, read the wording before you move a balance. One protection applies: in the last two billing cycles before a deferred interest period ends, anything you pay above the minimum must go to that balance first (12 CFR 1026.53(b)). Our piece on store cards works through what missing the deadline by $60 costs.

A 0% intro APR on purchases follows the same arithmetic as a transfer, without the fee. To finance a $2,000 purchase over an 18-month 0% period, divide by 18 and pay $111.11 a month, set up as an automatic payment.

The real risk is the end of the promotion

Federal law requires an introductory rate to last at least six months, and the offer must disclose the “go-to” rate that applies afterward. The CFPB’s advice is to compare that go-to rate with what you pay now, plus the fee. Whatever balance is left on the last day starts accruing interest at the go-to rate the next day.

The way to avoid that is a payment you set on day one: the balance plus the fee, divided by the promotional months. For the example, that is $6,180 ÷ 12, or $515. With a 15-month promotion it would be $412. Put it on autopay and set a calendar alert a month before the promotion ends.

The minimum payment will not get you there. If the card’s minimum on a 0% balance is 1% of the balance, 12 months of minimums on $6,180 pays down only $702.14 and leaves $5,477.86 to roll into the go-to rate. If you know you cannot clear the debt within the promotion, compare the transfer with a fixed-rate debt consolidation loan, which has a set payoff date.

The rules that protect the promotion, and the ones that don’t

A single late payment does not cost you the 0% rate. Under Regulation Z (12 CFR 1026.55), an issuer can end a promotional rate early, or charge deferred interest early, only if your minimum payment is more than 60 days late, and it must give you 45 days’ notice first. A payment a few days late still brings a late fee, a payment 30 days late can be reported to the credit bureaus, and an issuer can raise the rate on new purchases after 45 days’ notice, though not in the account’s first year. The full set of rate rules is in our guide to how card interest is calculated.

New purchases are the other cost. A card that carries a transferred balance typically gives no grace period on purchases, so they accrue interest from the day you buy even when you pay them off by the due date, as the CFPB’s 2023 credit card market report describes. And because anything you pay above the minimum goes to the highest-rate balance first (12 CFR 1026.53), your extra payments clear those purchases before they touch the transferred balance. Use a different card for spending until the transfer is paid off.

What a transfer does to your credit score

Applying for the new card usually means a hard inquiry, which for most people takes fewer than five points off a FICO score, according to FICO, and stops counting after 12 months. The new account also lowers the average age of your accounts.

The bigger effect is utilization, the share of your card limits you are using. The transfer does not reduce what you owe, but the new card’s limit raises your total available credit, so overall utilization falls. Scores also look at each card separately, so a transfer that fills most of the new card’s limit shows up as a nearly maxed-out account until you pay it down.

Think twice before closing the old card once it is at zero. Closing it removes its limit and pushes utilization back up, and its history stays on your report for up to 10 years either way. If you keep it open, keep it empty. A transfer that frees up the old card’s limit, followed by new spending on it, leaves you with two balances instead of one.