What happens when you move a balance to a new card

A balance transfer moves debt from one credit card to another, usually one with a lower interest rate. You request the transfer from the new card's issuer, they contact your old card company, and the new issuer pays off part or all of your old balance. You then owe that amount to the new card instead of the old one.

The new card typically offers a promotional interest rate—often 0% APR—for a set period, usually 6 to 21 months depending on the card and the issuer. After that period ends, the remaining balance reverts to the card's regular APR, which can be 15% to 25% or higher. The goal is to pay down the balance during the promotional window before interest kicks back in.

Balance transfers are not free. Most cards charge a transfer fee of 3% to 5% of the amount you move. If you transfer $5,000 at a 4% fee, you pay $200 upfront—either added to your new balance or charged immediately, depending on the issuer. This fee is part of the math you need to do before deciding whether a transfer saves you money.

Key Takeaways

  • The new card issuer pays off your old card balance, and you owe that amount on the new card instead, usually at a promotional 0% APR for 6 to 21 months.
  • Balance transfer fees run 3% to 5% of the amount transferred and are charged upfront or added to your new balance.
  • You must make at least the minimum payment on the new card during the promotional period, or you may lose the promotional rate.
  • Any new purchases on the new card typically accrue interest immediately at the regular APR, separate from the transferred balance.
  • The transferred balance reverts to the card's standard APR once the promotional period ends, so a payoff plan before that date is essential.

How to request a balance transfer

Start by opening an account with the new card issuer. You do not need to wait for the physical card to arrive—most issuers let you request the transfer online or by phone as soon as your account is approved. You will need the account number of the card you want to pay off, the amount you want to transfer, and the name and address of the old card issuer.

The new issuer will contact your old card company directly. The transfer typically takes 5 to 14 business days to post. During this time, keep making minimum payments on your old card to avoid late fees. Once the transfer completes, the old card balance drops and the new card balance rises by the transfer amount plus the fee.

Some issuers let you transfer balances from multiple cards to one new card. Check the card's terms to see if there is a limit on the number of transfers or a cap on the total amount you can move.

The math: when a balance transfer actually saves money

A balance transfer only saves money if the interest you avoid during the promotional period exceeds the transfer fee you pay upfront. Here is how to calculate it:

Suppose you have a $3,000 balance on a card charging 20% APR. If you do nothing, you will pay roughly $600 in interest over one year (the exact amount depends on your payment schedule). A new card offering 0% APR for 12 months with a 3% transfer fee costs you $90 upfront. You save $510 by transferring, even after the fee. But if the promotional period is only 6 months, the interest savings shrink, and the fee may eat most or all of the benefit.

The longer the promotional period and the higher your current APR, the more a transfer helps. If your current card charges 10% APR and the new card offers 0% for 6 months, the savings are smaller and may not justify the fee. Use an online balance transfer calculator to plug in your specific numbers before you commit.

What happens to new purchases on the transferred card

New purchases on the card with the transferred balance do not get the promotional 0% rate. They accrue interest at the card's regular APR immediately, starting from the day you make the purchase. This is a critical detail many people miss.

If you transfer a balance and then use the card for new spending, you will have two separate balances with different interest rates. Payments go toward the balance with the highest APR first (by law), which is usually the new purchases. This means your transferred balance—the one you wanted to pay down during the promotional period—may grow if you are not careful.

The safest approach is to stop using the card for new purchases once you transfer a balance. Keep it open but set it aside, and use a different card or cash for everyday spending. This keeps your focus on paying down the transferred balance before the promotional rate expires.

What can disrupt your promotional rate

Missing a payment is the most common way to lose a promotional rate. If you pay late—even by one day, on some cards—the issuer can cancel the 0% APR and apply the regular rate to your entire balance immediately. This can happen even if you have otherwise been a good customer. Read the card's terms to see how strict the issuer is about payment timing.

Some cards also have a clause that ends the promotional rate if you exceed your credit limit or if your credit score drops significantly. These are less common, but they exist. Check the fine print before you transfer.

The promotional period also ends on a specific date. Mark it on your calendar. If you have not paid off the balance by then, the remaining amount will start accruing interest at the regular APR. If you cannot pay it off in time, look into transferring the remaining balance to another 0% card before the first promotional period ends—though this only works if you still have good credit and can find another card willing to take the transfer.

Balance transfers versus other debt-payoff options

A balance transfer is one way to reduce interest, but it is not the only way. A personal loan from a bank or credit union may offer a lower APR than a balance transfer card, with no promotional period that expires. The tradeoff is that a personal loan has a fixed monthly payment and a set payoff date, whereas a balance transfer card lets you pay as much or as little as you want each month (as long as you hit the minimum).

If you have multiple cards with high balances, consolidating them into one balance transfer card simplifies your payments and gives you a clear deadline to work toward. If you have only one card and a modest balance, a personal loan might be cheaper and easier to manage.

If your credit score is low, you may not be approved for a balance transfer card or a personal loan. In that case, negotiating directly with your current card issuer for a lower APR, or working with a nonprofit credit counselor, may be your best option.

Frequently Asked Questions

Can I transfer a balance from one card to the same issuer's other card?

Most issuers do not allow transfers between their own cards. You typically must transfer to a card from a different company. Check the specific card's terms, as policies vary.

What if I can only pay part of the transferred balance before the promotional period ends?

The unpaid portion will start accruing interest at the regular APR once the promotional period ends. You can then transfer the remaining balance to another 0% card if you are approved, though this only works if your credit is still good and you can find another issuer willing to take the transfer.

Does a balance transfer hurt my credit score?

A balance transfer involves a hard inquiry and opens a new account, both of which can lower your score slightly in the short term. However, it also lowers your overall credit utilization if you pay down the old card, which can help your score over time. The net effect depends on your specific situation.

Can I transfer a balance if I am behind on payments?

Most issuers will not approve a balance transfer if you have recent late payments or are currently delinquent. You will need to bring your account current first, which may take several months to show up on your credit report.

What happens to my old card after I transfer the balance?

Your old card account remains open with a zero balance. You can keep it open to maintain your credit history, or you can close it. Closing it may lower your credit score slightly because it reduces your total available credit. Most people keep old cards open for this reason.