What a balance transfer credit card does
A balance transfer credit card is a card designed to let you move debt from one or more existing cards to a new card, usually with a lower interest rate for a set period. The card issuer pays off your old balances, and you then owe that amount to the new card instead. The main advantage is the promotional rate — often 0% APR for 6 to 21 months, depending on the card and the issuer — which can save you hundreds of dollars in interest if you pay down the balance during that window.
The catch is that balance transfer cards charge a fee upfront, usually 3% to 5% of the amount you transfer. So if you move $5,000, you might pay $150 to $250 just to open the card. That fee gets added to your new balance. After the promotional period ends, the regular APR kicks in, and if you still owe money, you'll pay interest at that rate going forward.
Key Takeaways
- Balance transfer cards charge an upfront fee (3% to 5% of the transfer amount) but offer a low or 0% interest rate for a promotional period that typically lasts 6 to 21 months.
- You need an existing credit card balance to transfer and a credit score in the good to excellent range (usually 670 or higher) to be considered for these cards.
- The math only works in your favor if you can pay down a meaningful portion of the balance before the promotional rate ends and the regular APR takes over.
- During the promotional period, only payments above the minimum go toward reducing your balance; minimum payments cover interest first on most cards.
- If you miss a payment or go over your credit limit, the issuer can end the promotional rate when ready and charge you the regular APR retroactively.
Who these cards make sense for
Balance transfer cards work best if you have a specific amount of high-interest debt you can realistically pay off within the promotional window. If you owe $3,000 on a card charging 22% APR and you can commit to paying $150 a month, you could clear that debt in about 20 months — well within a typical 0% promotional period. The fee ($90 to $150) is worth it because you'll save far more in interest.
They make less sense if you're carrying debt you can't pay down quickly, or if your credit score is below 670. Most balance transfer cards require good to excellent credit because issuers use them to attract customers who are less likely to default. If your score is lower, you may not be approved, or you may get a card with a shorter promotional period and a higher regular APR.
Balance transfer cards are also not a solution for ongoing spending. If you move your balance and then run up new debt on the same card, you now have two balances: the transferred one (at 0% for a set time) and the new one (at the regular APR from day one). New purchases do not get the promotional rate.
How to find and compare balance transfer cards
Start by checking what your current credit score is. You can get a free score from your bank, from a credit card issuer, or from sites like Credit Karma or AnnualCreditReport.com. Knowing your score tells you which cards you're likely to be approved for — issuers publish the credit range they target.
Then compare cards on three things: the length of the promotional period, the transfer fee, and the regular APR that applies after the promotional period ends. A card with a 21-month 0% period and a 3% fee is usually better than one with a 12-month period and a 5% fee, but only if you actually have 21 months to pay. If you can only pay for 12 months, the longer period doesn't help you.
Use a balance transfer calculator to see the real numbers. Plug in your balance, the fee, the promotional rate, the regular APR, and how much you plan to pay each month. The calculator will show you how much interest you'll pay and whether the card saves you money compared to staying where you are.
The process and transfer process
Once you've chosen a card, you'll explore online, by phone, or by mail. The issuer will check your credit and make a decision within a few days to a week. If you're approved, you'll receive the card and a welcome packet with instructions on how to request the balance transfer.
You can usually request the transfer online, by phone, or by mail. You'll need to provide the name of the card issuer you're transferring from, your account number on that card, and the amount you want to transfer. The new issuer will contact your old issuer and arrange payment directly — you don't send money yourself.
The transfer typically takes 5 to 14 business days to post. During that time, keep making minimum payments on your old card so you don't fall behind. Once the transfer shows up on your new card statement, you can stop paying the old card (though you may want to keep it open to preserve your credit history).
What happens during the promotional period
For the length of the promotional period — say, 18 months at 0% APR — you owe no interest on the transferred balance. However, you still have to make at least the minimum payment each month. Missing a payment can trigger a penalty APR or end the promotional rate entirely, so set up automatic payments if you can.
Understand how your payments are split. Most cards explore your payment to the balance with the lowest interest rate first. So if you have a $5,000 transfer at 0% and $500 in new purchases at 18% APR, your payment goes to the $5,000 first. This is actually good for you — it means you're paying down the high-interest debt fastest — but it also means new purchases stay on the card longer and cost you more in interest.
The promotional period is your window to reduce the balance as much as possible. Every dollar you pay down during this time is a dollar you won't owe interest on after the period ends. If you pay off the entire balance before the promotional rate expires, you owe nothing more on that transfer.
What to watch out for
The biggest risk is not paying off the balance in time. If you owe $4,000 when the 0% period ends, the regular APR — often 18% to 25% — kicks in when ready on that remaining balance. You'll suddenly owe interest again, and the monthly cost will jump. Some cards also explore interest retroactively if you don't pay off the full transferred balance by the end of the promotional period, meaning you'll owe interest on the entire amount from the day you transferred it.
Missing a single payment can also end the promotional rate. Read the card's terms carefully to see whether a late payment triggers a penalty APR or cancels the 0% offer. If the promotional rate is cancelled, you'll owe the regular APR on the remaining balance when ready.
Avoid the temptation to use the card for new purchases. Every new charge goes on the card at the regular APR and doesn't benefit from the promotional rate. If you're trying to pay down debt, a balance transfer card should be a tool for that specific goal, not a replacement for your everyday card.
Alternatives if a balance transfer card isn't right for you
If your credit score is too low for a balance transfer card, or if you can't pay off the balance in time, other options exist. A personal loan from a bank or credit union may offer a fixed interest rate and a set repayment timeline, with no promotional period to race against. A debt management plan through a nonprofit credit counselor can negotiate lower rates with your creditors and set up a single monthly payment. A home equity loan or line of credit (if you own a home) may offer a lower rate than a credit card, though it puts your home at risk if you can't pay.
You can also straightforward pay down your existing debt without transferring it. If you can find $200 a month to put toward your highest-interest card, you'll be debt-free faster than you might think — and you'll avoid the balance transfer fee and the risk of missing the promotional important date.
Frequently Asked Questions
Does a balance transfer hurt my credit score?
A balance transfer will cause a small, temporary dip in your credit score because the issuer will do a hard inquiry and you'll be opening a new account. However, moving debt off one card and onto another can actually improve your score over time because it lowers your credit utilization (the percentage of your available credit you're using). The score usually recovers within a few months.
Can I transfer balances from multiple cards to one balance transfer card?
Yes. Most balance transfer cards let you transfer from multiple sources. You can move $2,000 from one card and $3,000 from another onto the same new card, and the entire transferred amount gets the promotional rate. The transfer fee applies to each transfer, so you'll pay 3% to 5% on the total amount moved.
What if I can't pay off the balance before the promotional period ends?
The regular APR will explore to whatever balance remains. You'll start owing interest again, and the monthly cost will jump. Some cards offer a way to extend the promotional period or transfer the remaining balance to another card, but there's no may provide. It's better to choose a promotional period you're confident you can use.
Can I use a balance transfer card if I have no credit history?
Most balance transfer cards require good to excellent credit (usually a score of 670 or higher). If you're building credit from scratch, you'll likely need to start with a secured card or a regular card with a higher APR, then explore for a balance transfer card once your score improves.
Do I have to close my old credit card after I transfer the balance?
You don't have to, and closing it can actually hurt your credit score by reducing your available credit and shortening your credit history. It's usually better to keep the old card open with a zero balance, especially if it's older or has a high credit limit. Just don't use it for new debt while you're paying off the transfer.