A 0 interest balance transfer can give you a period to repay credit card debt without interest accruing on the transferred amount, but the balance itself does not shrink when you move it. A transfer fee, a short payoff window or a high rate after the offer ends can reduce or erase the benefit. Before applying, check which debts qualify, when the promotional period starts and ends, and how much you would need to pay each month to clear the balance on time. The offer is most useful when that payment fits your budget and its total cost is lower than your realistic alternatives.
A balance transfer moves debt from one account to another. With a 0% introductory APR offer, the card issuer temporarily does not charge interest on eligible transferred balances during the promotional period, provided you meet the offer’s terms. You still owe the principal, and you must make at least the required payment each month.
The offer applies only to the transactions and balances specified in the card agreement. A transfer may need to come from an eligible external account, and some issuers exclude balances from other cards they issue. The issuer may also set a transfer deadline, a maximum transfer amount or other eligibility conditions. Read the offer details before applying rather than assuming every debt can be moved.
Pay attention to three dates or figures: when the promotional period begins, the last date to request a qualifying transfer, and the date the promotional rate ends. The introductory period may start before a transfer finishes processing, so a delay can reduce the time you have to repay. If the offer’s wording is unclear, ask the issuer how it applies to your specific transfer.
Keep making payments to the original creditor until the transfer has posted and you have confirmed that the old balance is paid. Processing takes time, and a transfer request does not cancel the original payment obligation. A missed payment on the old account could lead to a late fee or other account consequences, even if you have already requested a transfer.
A promotional balance transfer is one repayment option, not an automatic improvement over keeping your existing card or using a different form of borrowing. Compare the total cost and the payment you can sustain, rather than focusing only on the advertised introductory rate.

| Option | Potential advantage | Cost or limitation to check | May suit you when |
|---|---|---|---|
| 0% balance transfer card | Eligible transferred debt may not accrue interest during the introductory period. | Transfer fee, eligibility, transfer deadline, credit limit and post-promotion APR. | You can make a realistic plan to repay most or all of the balance before the offer ends. |
| Keep the debt on the current card | No new account or transfer fee is required. | The current APR and the interest likely to accrue under your planned payments. | The balance is small, close to being paid off, or a new transfer would cost more than it saves. |
| Personal loan or another consolidation option | A fixed repayment schedule may make the end date and payments easier to plan. | APR, any origination or other fees, repayment term and consequences of missed payments. | You need a structured schedule or cannot comfortably repay the balance within a card’s promotion. |
The right comparison is based on your likely repayment, not a best-case assumption. A transfer can be attractive if the fee is modest and you can pay the debt down during the offer. Keeping the balance may be simpler if it is nearly paid off. A loan may offer a defined schedule, but its costs and terms need their own review.
First estimate the amount that would need to be repaid: the balance you plan to transfer plus any transfer fee that is added to the account. Then divide that total by the number of months you expect to have at the promotional rate. This gives a basic monthly target; it is not a substitute for checking the issuer’s exact dates, payment rules or fee calculation.
For example, suppose you transfer $5,000 and the offer charges a 3% fee. Those figures are illustrative only, not a claim about a typical or currently available offer. The fee would be $150, bringing the amount to repay to $5,150 if it is added to the transferred balance. If the offer lasts 15 months from the point relevant to your account, paying about $343.33 each month would cover that amount in 15 equal payments, assuming no additional charges or other changes.
Compare that target with your actual budget, leaving room for expenses that could vary from month to month. If $343.33 is not sustainable, a plan based on that amount is unlikely to clear the balance on schedule. Work out a payment you can maintain, then estimate how much would remain when the promotion ends and what rate would apply to it.

To judge whether the transfer saves money, compare the fee and any interest you expect after the promotion with the interest you would pay if you kept the debt where it is. Use the same planned payment amount and timeline for both estimates. The current card’s interest depends on its APR, balance and payment pattern, so a simple fee-versus-APR comparison can be misleading. A payoff calculator can help you model the two scenarios, but use the card agreements for the actual rates and fees.
Also check whether the transfer fee counts toward the new card’s credit limit. If it does, the available limit may be less than the amount you hoped to move. An issuer is not required to approve the full transfer you request, and a partial transfer could leave debt on the original account while you pay the new card as well.
It can help to keep the new card focused on the transferred balance while you repay it. New purchases may be treated under a separate APR, and carrying a balance can affect the interest treatment of purchases. The rules vary by card. If you plan to use the card for spending, check its purchase APR, grace-period terms and how payments are allocated among balances before doing so.

Applying for a new card can also affect your credit profile. The application, the new account and changes in how your balances relate to available credit may all matter, but the effect varies by person and scoring model. No balance transfer guarantees approval, a particular credit limit or a particular change in a credit score. Avoid applying on the assumption that the issuer will approve enough credit to move every balance.
A 0 interest balance transfer is less appealing if the fee is high relative to the interest you would otherwise pay, the promotional period is too short for your budget, or you are unlikely to qualify for enough credit to move a useful portion of the debt. It may also be a poor fit if the new payment target would force you to rely on credit for ordinary expenses again.
If you cannot repay the balance before the offer ends, work out the likely remaining amount and the rate that would apply after the promotion. You can compare that outcome with staying on your current card or with a consolidation option that has a repayment schedule suited to your finances. A second balance transfer is not guaranteed: it can involve another fee, another application and another promotional deadline.
If making even the minimum payments has become difficult, contact your current card issuer before missing a payment and ask what options it offers. You can also consider speaking with a reputable nonprofit credit counsellor in your area. Review any proposed service fees and terms carefully before enrolling in a debt-management or settlement program.

It may. The issuer’s offer will state whether a transfer fee applies, how it is calculated and whether a minimum fee is charged. Include any fee in the amount you expect to repay and in your comparison with other options.
That depends on the issuer and the specific offer. Some offers exclude balances owed to the same card company, so check the eligible-account terms before submitting a request.
Often you can, but the purchase APR and interest treatment may differ from the promotional rate on transfers. If you carry a balance, you may not receive the same purchase grace period you would have when paying the statement in full. Check the card agreement and consider avoiding new spending on the account until the transfer is repaid.
For a standard introductory APR offer, any unpaid amount generally becomes subject to the applicable post-promotion APR going forward. The exact rate and timing are in the card terms. Do not confuse an introductory APR offer with a deferred-interest arrangement, which can have different conditions.
There is no guaranteed result. A new application and account, as well as changes to balances and available credit, may affect a credit profile differently from one person to another. Treat the transfer as a repayment decision, not a method for promising a particular score change.
Not automatically. Closing an account can change your available credit and may have other effects on your credit profile, while keeping it open does not require you to use it. Consider the account’s fees and terms, and avoid rebuilding a balance on it after the transfer.
Use a 0 interest balance transfer only when the fee, eligible balance, promotional dates and post-offer rate are clear—and when the monthly payment needed to repay the debt fits your budget. If the numbers do not work, compare another repayment route before moving the balance. This guide is general financial education, not individualized financial advice.