What a balance transfer is

A balance transfer is moving debt from one credit card to another, usually to a card offering a lower interest rate for a set period. You contact the new card issuer, give them your old card details, and they pay off that balance on your behalf. You then owe the new card issuer instead of the old one.

The main reason people do this is to reduce how much interest they pay. If you carry a balance at 22% interest and move it to a card charging 0% for 12 months, you stop paying interest during that promotional period — as long as you make no new purchases and keep up with payments.

Balance transfers are not the same as a cash advance or a new loan. The debt itself stays the same; only the card holding it changes. You still owe the full amount you transferred.

Key Takeaways

  • A balance transfer moves your existing credit card debt to a different card, usually one with a lower or temporary 0% interest rate.
  • Most cards charge a one-time transfer fee (typically 3% to 5% of the amount moved), which is added to what you owe.
  • The 0% interest period lasts only as long as the promotional offer — often 6 to 21 months — after which the regular interest rate kicks in.
  • You must pay down the transferred balance before the promotional period ends, or interest will accrue on whatever remains.
  • New purchases on the transfer card usually do not get the promotional rate and begin accruing interest immediately.

How the transfer fee works

When you move a balance, the new card issuer charges you a balance transfer fee. This is a percentage of the amount you transfer, typically between 3% and 5%, though some cards charge as little as 1% or as much as 8%. A few cards occasionally offer 0% transfer fees, but this is uncommon.

The fee is added to your new balance. If you transfer $5,000 with a 4% fee, you now owe $5,200 on the new card. This fee is charged upfront, not over time. You pay it whether you pay off the balance in full during the promotional period or not.

The fee can make a transfer worthwhile or not, depending on your situation. If you transfer $5,000 at 4% ($200 fee) from a card charging 22% interest, you save money even with the fee — but only if you pay down the balance before the promotional period ends.

The promotional interest rate period

The 0% interest rate (or reduced rate) lasts for a set number of months, which varies by card and offer. Common promotional periods are 6, 12, 18, or 21 months. Some cards offer longer periods for customers with strong credit histories.

This period is a fixed deadline. When it ends, the regular interest rate for that card applies to any remaining balance. If you still owe $3,000 when the 0% period expires, you begin paying interest on that $3,000 at the card's standard rate — which can be 18% to 25% or higher.

The promotional rate applies only to the transferred balance, not to new purchases. Money you charge to the card after the transfer typically starts accruing interest immediately at the regular rate, even during the promotional period. This is why most people stop using the transfer card for new charges.

When a balance transfer makes financial sense

A balance transfer saves you money only if you pay off the transferred amount before the promotional period ends. The math is straightforward: compare the transfer fee plus any interest you pay during the promotional period against the interest you would pay on the original card.

Example: You owe $4,000 on a card charging 20% interest. Paying the minimum ($100 per month) would take about 5 years and cost roughly $2,400 in interest. A balance transfer to a 0% card for 18 months with a 4% fee ($160) costs you $160 total — a savings of $2,240 — but only if you pay $223 per month to clear the balance within 18 months.

A transfer makes less sense if you cannot commit to a payoff plan. If you transfer $5,000, pay $100 per month, and still owe $2,000 when the promotional period ends, you have paid the transfer fee and will now pay interest on the remaining balance at the new card's regular rate.

What happens when the promotional period ends

When the 0% period expires, the card's regular interest rate applies to any unpaid balance. This rate is set by the issuer and can range from 15% to 29% depending on the card and your creditworthiness. You will see this rate listed in the card's terms as the purchase APR or balance transfer APR.

If you have paid off the entire transferred balance before the period ends, no interest applies — you owe nothing. If you still carry a balance, interest begins accruing on the remaining amount immediately.

Some people use a second balance transfer to move the remaining balance to another 0% card, but this requires opening a new card, paying another transfer fee, and having the credit to be approved. This strategy can work but becomes expensive if done repeatedly.

How to request a balance transfer

To start a balance transfer, contact the new card issuer (the one offering the promotional rate) after you have been approved for the card. You can usually request the transfer online through your account, by phone, or by mail.

You will need to provide the account number of the card you are transferring from, the amount to transfer, and sometimes the name and address of the old card issuer. The new issuer will then contact your old card company and arrange the payment.

The transfer typically takes 5 to 14 business days to complete. During this time, you should continue making minimum payments on the old card to avoid late fees. Once the transfer posts, the old card's balance will drop (or close to zero if you transferred the full amount), and the new card's balance will increase by the transfer amount plus the fee.

Risks and things to watch for

The biggest risk is not paying off the balance before the promotional period ends. If you transfer $6,000 and the 0% period is 12 months, you need to pay at least $500 per month to clear it. Missing this target means paying interest on whatever remains.

Another risk is making new purchases on the transfer card. These charges usually do not receive the promotional rate and begin accruing interest immediately. Some people accidentally use the transfer card for everyday spending and end up with a much larger balance than they intended.

Late payments can also end the promotional rate early. If you miss a payment, the card issuer may cancel the 0% offer and apply the regular interest rate to your entire balance, even if you still have months left in the promotional period. Always pay on time, even if you are only paying the minimum.

Frequently Asked Questions

Does a balance transfer hurt my credit score?

A balance transfer can temporarily lower your score because the new card issuer runs a hard inquiry and opens a new account. However, moving debt from one card to another does not change your total debt — it just moves it. Over time, if you pay down the balance, your score typically recovers and may improve.

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 open a new card or use a different card you already own. Some issuers allow you to transfer balances between cards in their product line, but the receiving card must be different from the one holding the debt.

What if I cannot pay off the balance before the 0% period ends?

Interest will begin accruing on the remaining balance at the card's regular rate. You can continue paying it down, but you will now pay interest. Some people open another balance transfer card to move the remaining balance again, though this means paying another transfer fee and requires approval for a new card.

Is there a limit to how much I can transfer?

Yes. The card issuer sets a maximum transfer amount, usually based on your credit limit and credit history. You cannot transfer more than your approved credit limit, and the issuer may set a lower limit specifically for balance transfers. You will see this limit when you request the transfer.

Do I need to close my old card after a balance transfer?

You do not have to, but closing it can hurt your credit score because it reduces your available credit and may increase your credit utilization ratio. Most people leave the old card open with a zero balance, which helps their credit score over time.