What a balance transfer credit card does
A balance transfer credit card is a card that lets you move debt from one or more existing cards to a new card, usually at a lower interest rate for a set period. The new card typically offers a 0% introductory rate for 6 to 21 months, depending on the card and the issuer. During that window, interest does not accrue on the transferred balance, which means more of your payment goes toward reducing what you actually owe.
The catch is that the introductory rate expires. After the promotional period ends, a standard interest rate (called the "go-to rate") kicks in. You also pay an upfront fee to move the balance — usually 3% to 5% of the amount transferred. Some cards waive this fee for a limited time, but most do not.
Balance transfer cards work best if you have a concrete plan to pay down the debt during the interest-free window. Without that plan, you end up with a new card, the same debt, and a fee you did not have before.
Key Takeaways
- Balance transfer cards offer 0% interest for a limited time, typically 6 to 21 months, but charge an upfront fee of 3% to 5% of the amount you transfer.
- You need good to excellent credit (usually a score of 670 or higher) to be approved for a card with a competitive introductory rate.
- The card issuer transfers the balance directly to the new card, but you must initiate the request — it does not happen automatically.
- Your payment during the promotional period reduces the principal balance, not just interest, so the math works in your favor if you pay consistently.
- When the introductory rate ends, any remaining balance reverts to the standard rate, which can be 15% to 25% depending on your creditworthiness and the card.
Who qualifies for a balance transfer card
Credit card issuers use your credit score, income, and existing debt to decide whether to approve you and what rate to offer. A score of 670 or higher generally opens access to cards with competitive 0% introductory offers. Scores below 650 may still get approved, but the promotional rate will be shorter (6 months instead of 18) or the go-to rate will be higher.
You will also need to show income — either from employment, self-employment, or other sources — that the issuer believes is stable enough to support the new card's credit limit. If you are unemployed or have very low income, approval becomes harder. Issuers also look at your existing debt-to-income ratio: if you already owe a lot relative to what you earn, they may deny you or offer a lower limit.
Having an existing relationship with the issuer (a checking account, savings account, or another card) sometimes improves your odds, but it is not required. Each issuer has its own standards, so rejection from one card does not mean you will be rejected by another.
How to request a balance transfer
Once you are approved for the new card, you initiate the balance transfer yourself. You can do this online through the card issuer's website, by phone, or sometimes through the card's mobile app. You will need the account number, current balance, and creditor name for each card you want to transfer from.
The issuer then contacts your old card company and arranges the transfer. The funds move electronically, usually within 7 to 14 days, though some issuers complete transfers in as little as 3 days. During this window, keep making minimum payments on your old card — the transfer is not when ready, and missing a payment can hurt your credit score.
Once the transfer posts to your new card, the old card's balance drops to zero (or close to it). You can then close that card if you want, though closing old accounts can temporarily lower your credit score. Many people keep the old card open but unused to preserve their credit history and available credit.
The cost of a balance transfer
The upfront fee is the main cost. If you transfer $5,000 at a 3% fee, you pay $150 when ready — it gets added to your new card balance. A 5% fee on the same amount costs $250. Some cards offer a limited-time waiver on this fee (for example, "no transfer fee for the first 60 days"), so timing your transfer can save money.
The second cost is the go-to rate after the promotional period ends. If you still owe $3,000 when the 0% rate expires and the new rate is 18%, you will pay roughly $45 per month in interest alone. This is why the math only works if you pay down the balance during the interest-free window.
Some cards also charge an annual fee, though many balance transfer cards waive the first year or have no annual fee at all. Read the terms carefully — a $95 annual fee plus a 5% transfer fee can add up quickly if you are not paying attention.
Comparing balance transfer cards
The main variables to compare are the length of the introductory period, the transfer fee, the go-to rate, and any annual fee. A card with an 18-month 0% offer and a 3% fee is usually better than one with a 12-month offer and a 5% fee, assuming your credit score qualifies you for both.
You should also check whether the 0% rate applies only to transferred balances or also to new purchases. Some cards offer 0% on both; others offer 0% only on transfers and charge interest on new purchases from day one. If you plan to use the card for new purchases, this matters.
Look up the go-to rate in the card's terms. A card that advertises "0% for 18 months" but has a go-to rate of 24% is less attractive than one with a 16% go-to rate, because you will pay more interest after the promotional period ends.
What to do during the interest-free period
Your goal is to pay down as much of the transferred balance as possible before the promotional rate expires. Divide the balance by the number of months in the promotional period to find your target monthly payment. If you transfer $6,000 and have 18 months, aim to pay $333 per month to eliminate the debt before interest kicks in.
Set up automatic payments if your issuer offers them — this removes the risk of missing a payment and triggering a penalty rate. Even one missed payment can end the promotional rate early, so consistency matters more than paying extra some months and skipping others.
Avoid using the new card for new purchases during this period. New purchases usually accrue interest when ready, and they complicate your payoff math. Treat the balance transfer card as a debt-repayment tool, not a spending tool.
What happens when the promotional rate ends
On the day the 0% period expires, any remaining balance converts to the go-to rate. If you still owe $2,000 and the rate is 19%, you will owe roughly $32 per month in interest. This is why paying aggressively during the promotional window is critical.
You have options at this point. You can continue paying down the balance at the new rate. You can transfer the remaining balance to another 0% card (though you will pay another transfer fee). Or you can consolidate the debt into a personal loan, which may have a lower fixed rate than the credit card's go-to rate.
If you transfer to a second balance transfer card, make sure the timing works: the new card's promotional period should start before the old card's ends, so you do not have a gap where you are paying interest. Also factor in the second transfer fee — it only makes sense if the new card's rate and terms are significantly better.
Frequently Asked Questions
Can I transfer a balance from one card to the same issuer's new card?
Most issuers do not allow you to transfer a balance from an existing card to a new card from the same company. You can transfer from cards issued by other banks or credit unions. Check the card's terms or call the issuer before explore if this is your situation.
What happens to my credit score when I do a balance transfer?
A balance transfer typically causes a small temporary dip in your score because the issuer pulls your credit report (a "hard inquiry") and you open a new account. Your score usually recovers within a few months. Over time, the transfer can help your score by lowering your overall credit utilization — the amount of available credit you are using.
Can I transfer a balance if I am behind on payments?
Most issuers will not approve you if you are currently 30 or more days late on any account. If you are behind, contact your current creditor and bring the account current before explore for a balance transfer card. Once you are current, you can explore.
What if I cannot pay off the balance before the promotional rate ends?
You will owe interest on the remaining balance at the go-to rate. Consider whether a personal loan, debt consolidation loan, or a second balance transfer card might offer a better rate. You can also contact the issuer to ask about extending the promotional period, though most will not.
Do I have to use the full credit limit for a balance transfer?
No. You can transfer any amount up to your credit limit. Transferring less than your limit leaves room for the transfer fee and any new purchases, and it keeps your credit utilization lower, which is better for your credit score.