You pay the fee once and avoid the interest.
A balance transfer buys time. The fee and the end date decide if it saves money.
How a credit card balance transfer works: the transfer fee, how long the low rate lasts, what happens to new purchases, and how to tell if it beats paying down the old card.
A balance transfer moves debt from 1 card to another card with a lower rate, often 0% for a set number of months. It saves money when the interest you avoid is larger than the transfer fee and you can pay the balance off before the low rate ends. It does not help if you keep adding new debt.
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Compare the fee with the interest you would pay on the old card over the same months.
New purchases can collect interest from the day you make them while a transferred balance sits on the card.
The CFPB says moving debt will not get you out of debt unless spending or income changes.
Use this calculationSavings = interest you would pay on the old card over the offer period − transfer fee − interest on anything left after the offer ends
ExampleYou owe $6,000 at 24% APR. Interest runs about $120 in the first month. A transfer with a 3% fee adds $180, so you owe $6,180. Paid over 18 months at 0%, that is $344 a month and the only cost is the $180 fee.
What a balance transfer is
The CFPB defines a balance transfer as moving an outstanding balance from 1 credit card to another, sometimes for a fee. The new card’s issuer pays off the amount on your old card, and you now owe that amount to the new issuer.
Card companies offer low or 0% transfer rates to win your business. The low rate is temporary. Your job is to use the time it buys.
The transfer fee
A balance transfer fee is a charge for moving the balance. The CFPB confirms that a card company may charge it even on a 0% offer. The fee is usually a percentage of the amount you move or a fixed dollar amount, whichever is more.
The fee is added to what you owe on the new card. On a $6,000 transfer, a 3% fee is $180 and a 5% fee is $300. Read the offer for the exact figure before you count your savings.
How long the low rate lasts
The issuer must tell you how long the introductory rate lasts and what rate applies afterward. The CFPB states that an introductory rate has to stay in effect for at least 6 months, unless you are more than 60 days late on a payment.
When the period ends, whatever balance is left starts to collect interest at the card’s regular rate. Put the end date on your calendar the day you are approved.
New purchases are the trap
This is the part most people miss. The CFPB explains that on most cards, if you carry a balance from month to month, new purchases collect interest from the date of each purchase. That is true even when the balance you are carrying is a 0% transfer.
You keep the interest-free window on purchases only if you pay the entire balance, including the transferred amount, by the due date. So a card holding a transfer is a poor card for daily spending, unless the offer also gives 0% on purchases.
How your payments are applied
When a card has balances at different rates, the CFPB explains that the amount you pay above the minimum generally must go to the balance with the highest rate. The issuer usually decides where the minimum itself goes.
This matters when a 0% transfer and regular-rate purchases share a card. Pay more than the minimum every month so the extra goes to the expensive part.
Set the monthly payment yourself
The minimum payment is not designed to clear the balance in time. Divide the balance, fee included, by the number of months in the offer. Pay at least that amount every month.
Set the payment to run automatically. A payment more than 60 days late can end the low rate early, and any late payment can bring a late fee.
What a transfer does not fix
A transfer lowers the cost of debt you already have. It does not lower the debt. If the old card fills back up while you pay down the new one, you end with 2 balances instead of 1.
The CFPB suggests starting with a budget and, if you need help, a nonprofit credit counselor. You can also ask your current issuer for a lower rate, a waived fee, or a due date that matches your payday. Some will agree.
What to check before you apply
Check 6 things: the transfer fee, the length of the low rate, the rate afterward, the deadline to complete the transfer after you open the card, whether purchases also get a low rate, and the credit limit you are given. The limit decides how much you can actually move.
Applying means a hard inquiry on your credit report. Many issuers also do not let you move a balance between 2 of their own cards, so check that rule in the offer.
Sources and scope
Check the evidence, then check the live offer.
Dean links directly to primary or government sources. Card terms and eligibility can change after the review date.
CFPB: What is a balance transfer fee?Confirms a fee can be charged on a 0% offer.CFPB: How long can I keep a low rate on a balance transfer?The 6-month minimum and the 60-day late rule.CFPB: Do I pay interest on new purchases after a balance transfer?Why new purchases can collect interest right away.CFPB: Consolidating credit card debtHow transfer fees are set and what to consider first.CFPB: Credit cards key termsOfficial definitions of balance transfer, APR, and grace period.