What a balance transfer is and when it saves you money
A balance transfer moves debt from one credit card to another, usually one with a lower interest rate. The card you transfer to often offers a promotional period — typically 6 to 21 months — where you pay little or no interest on that transferred balance. This matters because if you carry a balance, interest is usually your largest cost. Moving debt to a 0% card can save hundreds of dollars if you pay down the balance during the promotional window.
Balance transfers work best if you have existing credit card debt and a plan to pay it off before the promotional rate ends. If you transfer $5,000 at 0% for 12 months and pay it down steadily, you keep all your payments going toward principal. On your original card at 18% interest, that same $5,000 would cost you roughly $900 in interest over a year. The transfer fee — usually 3% to 5% of the amount transferred — is still far cheaper than a year of interest charges.
Balance transfers do not help if you plan to carry the debt indefinitely. Once the promotional period ends, the interest rate jumps to the card's regular rate, which is often 15% to 25%. They also do not help if you will run up new debt on the original card while paying down the transferred balance.
Key Takeaways
- Balance transfer cards offer 0% interest for a set period, usually 6 to 21 months, but charge a one-time transfer fee of 3% to 5%.
- The best deals have the longest promotional periods and lowest transfer fees, which you can compare across cards before you transfer.
- You need decent credit — usually a score of 670 or higher — to be considered for the best promotional rates.
- Calculate whether the transfer fee plus any new interest after the promotional period ends is still less than what you would pay on your current card.
- The promotional rate applies only to the transferred balance, not to new purchases you make on the new card.
How to compare balance transfer offers across cards
Start by looking at three numbers: the length of the promotional period, the transfer fee percentage, and the regular interest rate after the promotion ends. A card offering 18 months at 0% with a 3% fee is usually better than one offering 12 months at 0% with a 5% fee, but the math depends on your balance and how fast you can pay it down.
Use a straightforward calculation: multiply your balance by the transfer fee percentage to find the upfront cost. Then compare that to the interest you would pay on your current card over the same number of months. For example, if you have a $3,000 balance on a card charging 20% interest, transferring to a card with a 3% fee ($90) and 12 months at 0% costs you $90 upfront. Staying on your current card would cost roughly $300 in interest over 12 months. The transfer saves you $210, even after the fee.
Check the regular interest rate the card charges after the promotional period ends. Some cards charge 16% to 18% after the promotion; others charge 22% to 25%. If you think you might not pay off the full balance in time, a card with a lower regular rate is safer. Also confirm whether the card charges an annual fee — most balance transfer cards do not, but some premium cards do.
What credit score you need and how to check your options
Most cards offering 18+ months at 0% require a credit score of 700 or higher. Cards with shorter promotional periods (6 to 12 months) may accept scores as low as 670. If your score is below 670, you may still find balance transfer offers, but they will likely have shorter promotional periods or higher transfer fees.
You can check your credit score for free through your bank, your credit card issuer, or services like Credit Karma and AnnualCreditReport.com. Checking your own score does not hurt your credit. When you actually explore for a card, the issuer will do a hard inquiry, which does lower your score slightly — usually by 5 to 10 points — but the impact fades within a few months.
Before you explore, visit the card issuer's website and look for the "balance transfer offers" section. Most issuers show you the promotional terms and transfer fee without requiring an process. Some will also show you a pre-qualification offer based on your credit profile, which means you have a reasonable chance of being approved at those terms.
How to actually transfer your balance
Once you are approved for the new card, you have two ways to move the balance. The simplest is to ask the new card issuer to handle it. When you explore or shortly after approval, you can request a balance transfer. You will need the account number of your old card, the balance you want to transfer, and the old card issuer's name. The new issuer sends a payment directly to your old card issuer, paying off that portion of your balance.
The second method is to do it yourself: use the new card to make a payment to your old card issuer. This works but is slower and gives you less control over which balance gets paid. Most people use the issuer's balance transfer request because it is faster and the issuer handles the paperwork.
The transfer usually takes 5 to 14 business days to post. During that time, keep making minimum payments on your old card so you do not fall behind. Once the transfer posts, you will see the balance on your new card and a credit on your old card. At that point, stop using the old card and focus on paying down the transferred balance on the new card during the promotional period.
Avoiding common mistakes during the promotional period
The biggest mistake is making new purchases on the balance transfer card. The promotional 0% rate applies only to the transferred balance. New purchases usually start accruing interest when ready at the regular rate, often 18% to 25%. If you put $500 in new charges on the card, that $500 is not covered by the promotion and costs you interest from day one.
The second mistake is missing a payment. Even one late payment can end the promotional rate early and jump your interest to the regular rate, sometimes retroactively. Set up automatic payments for at least the minimum, and ideally for a fixed amount each month that will get you to zero before the promotion ends. If you have $4,000 to pay off in 12 months, aim for $335 per month to stay ahead of schedule.
The third mistake is transferring again right before the first promotion ends. Each balance transfer charges a fee, so moving the same debt multiple times costs you more in fees than paying it down would. If you cannot pay off the balance in time, it is usually cheaper to accept the regular interest rate on that card than to pay another 3% to 5% transfer fee.
What happens when the promotional period ends
When the 0% period expires, any remaining balance on the card switches to the regular interest rate. If you have paid off the entire transferred balance, nothing happens — you have no balance to charge interest on. If you still owe money, interest starts accruing at the card's standard rate, which you can find in the card's terms or by calling the issuer.
Some cards let you do another balance transfer to a different card if you still have a balance. This can make sense if you find a card with a better promotional offer, but remember that each transfer charges a fee. Calculate whether the new fee plus the remaining balance is worth it compared to just paying interest on your current card.
If you have paid off most of the balance and only a small amount remains, it may be cheaper to just pay it off on the original card rather than transfer again. For example, if you have $300 left and the new transfer fee would be $15 to $20, paying the remaining balance in a month or two might cost less in interest than the transfer fee.
Balance transfers versus other ways to lower your interest rate
A balance transfer is not the only option if you want to reduce interest charges. You can also ask your current card issuer for a lower interest rate. Call the customer service number on the back of your card and ask to speak with someone about your rate. If you have a good payment history and decent credit, some issuers will lower your rate by 2% to 5% without requiring a transfer. This does not eliminate interest, but it reduces it.
A personal loan is another option. If you have a balance of $5,000 or more and good credit, a personal loan from a bank or credit union might offer a fixed interest rate of 8% to 15%. The advantage is that the rate does not change, so you know exactly when you will be debt-free. The disadvantage is that you pay interest from day one, whereas a balance transfer gives you months at 0%. A personal loan makes more sense if you cannot pay off the balance during the promotional period.
A 0% balance transfer card is usually the cheapest option if you can pay down the balance within the promotional window. It costs less than a personal loan and less than staying on your current card. The key is having a realistic plan to pay it off before the promotion ends.
Frequently Asked Questions
Does a balance transfer hurt my credit score?
The process itself causes a small, temporary dip — usually 5 to 10 points — from the hard inquiry. Opening a new account also lowers your average account age slightly. However, a balance transfer can help your credit in the long run because it lowers your credit utilization ratio (the percentage of your available credit you are using). If you transfer $5,000 off a card and have $10,000 in total available credit across all cards, your utilization drops, which improves your score over time.
Can I transfer a balance from one card to the same card?
No. You cannot transfer a balance from a card to itself. You must transfer to a different card. Some people try to move a balance between cards from the same issuer, but most issuers do not allow this either. You need a card from a different issuer to complete a balance transfer.
What if I cannot pay off the balance before the promotional period ends?
The remaining balance will be charged the regular interest rate once the promotion ends. If you know you cannot pay it off in time, a personal loan or a lower-rate card from your current issuer might be a better choice. You can also do another balance transfer to a different card, but each transfer charges a fee, so calculate whether it is worth the cost.
Can I use a balance transfer card to pay off multiple cards at once?
Yes. You can request a balance transfer from more than one card. The new issuer will send payments to each of your old cards up to the total transfer limit on your new card. Just remember that the 0% rate applies to all transferred balances combined, and the transfer fee applies to each transfer separately.
Do I need to close my old card after transferring the balance?
You do not need to close it, and closing it can hurt your credit score by lowering your available credit and raising your utilization ratio. It is usually better to leave the old card open with a zero balance. If you are worried about running up new debt on it, you can put it away or cut it up, but keep the account open.