How it works
When a balance transfer can help
A balance transfer can reduce interest when a new card offers a low promotional APR for a limited time. The savings depend on the current APR, the promo length, the transfer fee, and whether you can pay enough each month to reduce the balance before the promotional period ends.
This calculator compares a current credit card payoff path with a transfer scenario. It adds the estimated transfer fee to the transferred balance, applies the promotional APR for the promo period, and then uses the post-promo APR if a balance remains.
The most important number is not just the promo APR. A 0% offer can still be expensive if the fee is high, the monthly payment is too low, or the remaining balance later switches to a high APR. The comparison box shows current interest, transfer interest, the fee, and estimated net savings.
Use this as a planning tool before applying. It does not recommend a specific card or lender, and it does not include credit approval, late fees, annual fees, or every card rule. This page is designed to stay educational and transparent, so any future advertising or partner links should be clearly disclosed and secondary to the payoff estimate.
Read the net difference, including fees
The starting transferred balance equals your current balance plus the percentage transfer fee. Each month uses the promotional APR until the entered promotional period ends; later payments use the post-promotion APR. The same monthly payment is used for the current card and transfer scenarios.
Net saving equals current-card interest minus transfer-plan interest minus the transfer fee. A negative result is extra cost, even if the headline promotional rate looks attractive. For example, moving $1,000 from a 0% card to another 0% card with a 5% fee costs $50 more under otherwise identical terms.
Check whether the offer also has a minimum fee, annual fee, separate purchase APR, or eligibility conditions. Those are not included here. If the promotion has a deferred-interest condition rather than a simple temporary APR, this model is not appropriate. Compare the actual written terms before applying.
Sources and calculation notes
Our numerical examples use the monthly model described in our methodology. For account rules and terminology, see:
Content updated September 21, 2026. Examples are illustrations, not lender offers or account-specific payoff quotes.