Balance Transfer Savings Calculator
Enter your balance, current APR, the transfer fee, and the 0% promo length. We'll show the exact monthly payment that clears it before the promo ends, how much interest you'd save, and whether the fee is worth paying.
That clears the $6,180 transferred balance — your $6,000 plus the $180.00 fee — across all 18 months of the promo, before the regular APR can kick in.
Paying the same $343.33 on your current card would cost $1,376.48 in interest. The transfer swaps that for a $180.00 fee — saving you $1,196.48 net.
Break-even is the point where the interest you avoid by sitting at the promo rate adds up to the $180.00 fee. Pay less than $343.33 a month and whatever balance is left when the promo ends starts accruing at the regular APR again — which is what quietly erases the savings.
The only payment that makes a transfer pay off
A 0% balance transfer doesn't save you anything by itself — it buys you a window. The savings are real only if you clear the balance before that window closes. So the number that matters isn't the promo rate or the fee in isolation; it's the monthly payment that retires the whole transferred balance, including the fee, by the last promo month.
The math is simple at a 0% promo rate: take your balance, add the transfer fee, and divide by the number of promo months. Transfer $6,000 at a 3% fee over an 18-month promo and you owe $6,180, which means roughly $343 a month. Pay that and you walk out the other side at zero with no interest — your only cost was the fee. Pay the card's minimum instead and you'll still be carrying most of the balance when the regular APR returns.
Weigh the fee against the interest you'd save
The transfer fee is the price of admission. A 3% to 5% fee is added to your balance the moment you transfer, so the question is whether the interest you avoid at the promo rate is bigger than that fee. When your current APR sits in the low 20s — typical for a carried credit-card balance — the answer is usually yes by a wide margin, because a single year at 22% would cost far more than 3% once.
That's what the break-even line above measures: how many months of avoided interest it takes for your savings to repay the fee. At a high APR that's often just a month or two, after which every dollar of avoided interest is pure savings. The transfer stops being worth it only when the fee is steep, the promo rate isn't much below your current rate, or the balance is small enough that you wouldn't have paid much interest anyway. To see the same trade from the other direction — interest cost with no transfer at all — run your balance through the credit card payoff calculator.
The trap at the end of the promo
The most common way a balance transfer goes wrong is the slide back to minimum payments. The 0% rate makes the balance feel harmless, so the monthly payment drifts down toward the minimum — and when the promo ends, whatever's left starts accruing at the regular APR, which is frequently higher than the card you left. The interest you dodged for a year can come roaring back in a few months on the leftover balance.
The defense is to treat the required payment above as a fixed bill, not a suggestion. If that payment is more than you can manage, a transfer with a longer promo window — or simply a more aggressive payoff on your existing card — may serve you better. Carrying only the minimum is its own slow disaster; the minimum payment trap calculator shows exactly how long that path takes and what it costs.
Frequently asked questions
Is a balance transfer worth it?
A balance transfer is worth it when the interest you'd save by moving to a 0% (or low) promo rate is comfortably larger than the upfront transfer fee — and when you can realistically pay the balance off before the promo expires. On a typical 3% fee, you break even almost immediately if your current APR is in the 20s, because one or two months of avoided interest already covers the fee. The risk isn't the math; it's discipline. If you only make the minimum and leave a balance when the promo ends, the regular APR returns and can wipe out everything you saved. Use the calculator above: if the 'interest saved' figure beats the fee and you can manage the required monthly payment, the transfer almost always comes out ahead.
What monthly payment do I need to pay it off before the promo ends?
Divide the transferred balance — your current balance plus the transfer fee — by the number of promo months. The calculator does this exactly: at a 0% promo rate it's simple division, and for a non-zero promo rate it solves the amortization formula so the balance hits zero on the last promo month. This is the single most important number on the page. Paying that amount every month is what turns a balance transfer from a temporary reprieve into actual savings; paying less leaves a balance to be hit by the regular APR the day the promo ends.
How does the balance transfer fee work?
Most issuers charge 3% to 5% of the amount you move, added to your new balance up front. Transfer $6,000 at a 3% fee and you start the promo owing $6,180 — the fee isn't billed separately, it rides along as principal. That's why the fee belongs in the payoff math: you have to clear the fee too before the promo ends. A few cards advertise no transfer fee, which changes the calculus entirely; with no fee, break-even is immediate and the transfer is almost always worth it if the promo rate is lower than your current APR.
What happens if I don't pay it off before the 0% period ends?
Any balance remaining when the promo expires starts accruing at the card's regular APR — often higher than the card you transferred from. Unlike a deferred-interest store-card offer, a standard balance transfer doesn't usually charge back-interest on what you already paid down, so you keep the savings you earned during the 0% window. But the leftover balance is now expensive again, and if it's large, the regular-rate interest can quietly erase the benefit of having transferred at all. The safe play is to size your monthly payment to clear the whole transferred balance inside the promo.
Does a balance transfer hurt my credit score?
Opening a new card triggers a hard inquiry and lowers your average account age, both of which can ding your score by a handful of points temporarily. Working the other way: moving a balance onto a new card raises your total available credit, which lowers your overall utilization ratio — usually a net positive for your score over a few months. The bigger risk is behavioral. If you transfer a balance and then run the old card back up, you've doubled your debt instead of consolidating it. Close or freeze the old card's spending if that's a temptation.
Can I transfer a balance more than once?
You can, but each transfer means a new card, a new hard inquiry, and a new fee on the amount you move. Serial transferring — sometimes called rate surfing — can keep a balance at 0% indefinitely, but the repeated fees add up and the credit-score churn works against you. It's far cheaper to size the payment so you clear the balance within a single promo window. Treat a balance transfer as a one-time payoff runway, not a permanent way to avoid interest.
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Estimates are educational only. The calculator assumes the full balance plus fee is transferred, that the promo rate applies for the entire promo period, and that you make the same payment every month. It does not model new purchases, late-payment penalty APRs, or deferred-interest terms. Actual offers, fees, and rates depend on the issuer and your credit — verify them before you apply.