What happens when you move a balance to a new card
A balance transfer moves debt from one credit card (or sometimes a loan) to a different card, usually one with a lower interest rate. The new card's issuer pays off your old balance, and you then owe that amount to them instead. The main reason to do this is to reduce how much interest you pay while you work down the debt.
Most balance transfer cards offer a promotional period — typically 6 to 21 months — during which the interest rate is 0%. After that period ends, the regular interest rate kicks in. The catch is that balance transfers usually cost money upfront: a fee of 3% to 5% of the amount you transfer, charged to your new card when ready.
The math only works if the interest you save during the promotional period is larger than the transfer fee you pay. If you transfer $5,000 at a 4% fee, you pay $200 upfront. If your old card charged 20% interest and your new card charges 0% for 12 months, you save roughly $1,000 in interest — so the transfer makes sense. If you only save $150, it does not.
Key Takeaways
- Balance transfer cards charge an upfront fee (usually 3% to 5%) but offer 0% interest for a set period, which can save you hundreds in interest if you pay down the balance during that time.
- You need good credit (typically 670 or higher) to be approved for a balance transfer card, and the credit limit offered may be lower than the balance you want to move.
- The promotional 0% period applies only to the transferred balance, not to new purchases you make on the card, which accrue interest when ready.
- If you do not pay off the full transferred balance before the promotional period ends, the remaining balance will be charged the regular interest rate, which can be 15% to 25%.
- You should stop using your old card after the transfer and focus on paying down the new card's balance during the interest-free window.
Who qualifies and what credit score you need
Balance transfer cards are designed for people with established credit history and a decent payment record. Most issuers require a credit score of at least 670, though many prefer 700 or higher. If your score is below 650, you will likely be denied or offered a card with a very short promotional period and a high regular interest rate.
Your credit report also matters. Issuers look at how many recent hard inquiries you have (applications for new credit), how much of your available credit you are using, and whether you have missed any payments in the past two years. A single late payment does not automatically disqualify you, but multiple late payments or a recent default will.
Even if you are approved, the credit limit the issuer offers may be lower than the balance you want to transfer. If you have $8,000 in debt but are only approved for a $5,000 limit, you can transfer $5,000 and leave $3,000 on your old card. You would then be paying interest on two balances instead of one.
How the transfer fee works and when you pay it
The balance transfer fee is a percentage of the amount you transfer, charged to your new card as soon as the transfer posts. The fee typically ranges from 3% to 5%, though some cards charge as little as 2% or as much as 6%. A few cards offer 0% transfer fees for a limited time, usually the first 60 days after you open the account.
The fee is added to your balance on the new card. If you transfer $5,000 at a 4% fee, your new balance is $5,200. That $200 fee does not earn interest during the promotional period, but it is part of what you owe. When the promotional period ends, any remaining balance — including the fee portion — will be charged the regular interest rate.
You should factor the fee into your decision. If you transfer $3,000 at 4%, you pay $120 upfront. If your old card's interest rate is 18% and you plan to pay off the balance in 12 months, you would have paid roughly $270 in interest on the old card. The transfer saves you about $150 after the fee, which is worth doing. If your old card's rate is 12% and you only plan to pay for 6 months, the savings shrink to roughly $50 — barely worth the effort.
The promotional period and what happens after
The promotional 0% interest rate applies only to the balance you transfer, and only for the length of the promotional period. The period varies by card and by offer — some are 6 months, some are 18 months, and a few stretch to 21 months. Longer promotional periods are usually offered to people with higher credit scores and lower balances.
New purchases you make on the card do not get the promotional rate. They are charged the regular interest rate when ready, which is typically 15% to 25% depending on your creditworthiness. This is why financial advisors recommend treating a balance transfer card as a payoff tool, not as a spending card. Use it only to move the old balance, then put it away.
When the promotional period ends, the remaining balance is charged the regular interest rate going forward. If you transfer $5,000 and pay down $2,000 during the promotional period, the remaining $3,000 will accrue interest at the card's standard rate. This is why it matters to have a payoff plan before you transfer — you need to know whether you can realistically pay down enough of the balance during the interest-free window.
How to calculate whether a balance transfer makes financial sense
Start by finding out three numbers: the balance transfer fee on the new card, the interest rate on your old card, and the length of the promotional period on the new card. Then estimate how much you can pay toward the balance each month.
Use this rough calculation: multiply your current balance by your old card's interest rate and divide by 12 to get the monthly interest you are currently paying. Multiply that by the number of months in the promotional period to estimate total interest you would pay on the old card during that time. Subtract the balance transfer fee from that number. If the result is positive, the transfer saves you money.
Example: You have $4,000 on a card charging 20% interest. A new card offers 0% for 12 months with a 4% transfer fee. Monthly interest on the old card is roughly $67 ($4,000 × 0.20 ÷ 12). Over 12 months, you would pay about $800 in interest. The transfer fee is $160. The net savings is $640, which makes the transfer worthwhile — but only if you actually pay down the balance during those 12 months.
Steps to complete a balance transfer
First, research cards that offer balance transfer promotions and check whether you meet the credit requirements. You can look at the card issuer's website or use a credit card comparison site. Read the terms carefully: note the promotional period length, the transfer fee, and the regular interest rate that applies after the promotion ends.
explore for the card online or by phone. The issuer will do a hard inquiry on your credit report and make a decision within minutes to a few days. If you are approved, you will receive a credit limit and instructions on how to initiate the transfer.
Contact the new card issuer and provide the account number of your old card, the amount you want to transfer, and the old card issuer's name. The new issuer will send a payment to your old card issuer on your behalf. This usually takes 5 to 14 business days. During this time, keep making at least the minimum payment on your old card to avoid a late fee.
Once the transfer posts, verify that the balance appears on your new card and that the old card balance has been paid off. Then create a payoff plan: divide the transferred balance by the number of months in the promotional period to find out how much you need to pay each month to eliminate the debt before interest kicks in. Set up automatic payments if possible, so you do not miss a payment and lose the promotional rate.
Common mistakes that cost you money
The most expensive mistake is not paying off the balance before the promotional period ends. If you transfer $5,000 and pay only $1,000 during a 12-month 0% period, the remaining $4,000 will suddenly be charged 18% or more. That $4,000 will cost you roughly $60 per month in interest alone, making it much harder to pay down.
Another mistake is making new purchases on the balance transfer card. Because new purchases are charged the regular interest rate when ready, you end up paying interest on spending while the transferred balance sits at 0%. This defeats the purpose of the transfer and makes your debt harder to track.
A third mistake is closing your old card when ready after the transfer. Closing a card reduces your available credit, which can lower your credit score. It also removes the history of that account, which can shorten your average account age. It is better to leave the old card open with a zero balance, or to use it occasionally for a small purchase you pay off when ready.
Frequently Asked Questions
What if I cannot pay off the full balance before the promotional period ends?
You will owe interest on the remaining balance at the card's regular rate, which is typically 15% to 25%. If you cannot pay off the entire balance during the promotional period, a balance transfer may still help if you can pay down a significant portion. Even partial payoff reduces the amount that will be charged interest after the promotion ends.
Can I transfer a balance from one card to another card from the same issuer?
Most issuers do not allow you to transfer a balance from another card they issued to you. However, you can transfer a balance from a card issued by a different bank. Check the card's terms or call the issuer to confirm whether they accept transfers from their own cards.
Does a balance transfer hurt my credit score?
A balance transfer involves a hard inquiry, which temporarily lowers your score by a few points. However, if you transfer a high balance to a new card with a higher credit limit, your credit utilization ratio may improve, which can raise your score over time. The net effect depends on your overall credit profile.
What happens if I miss a payment on the balance transfer card?
Missing a payment usually causes you to lose the promotional 0% rate when ready. The remaining balance will be charged the regular interest rate, and you may also be charged a late fee. This is why setting up automatic payments is important — it ensures you do not accidentally miss a due date.
Can I do multiple balance transfers to different cards?
Yes, you can transfer balances to multiple cards if you are approved for multiple balance transfer cards. However, each process triggers a hard inquiry and reduces your available credit, which can lower your score. Doing too many transfers in a short time can also raise red flags with issuers and make future approvals harder.