Find out if a 0% balance transfer card is actually worth it once you factor in the transfer fee.
This calculator compares total interest paid if you keep your balance on the current high-interest card vs. transferring to a 0% promotional card (after paying the transfer fee, which is typically 3-5% of the balance). It also checks whether your planned monthly payment will pay off the balance before the promotional period ends — critical, because any remaining balance after the promo period reverts to the card's regular (often very high) interest rate.
The biggest balance transfer mistake: Transferring a balance you can't realistically pay off within the promotional period. If $1,000 remains when the 0% period ends and the rate jumps to 24.9%, you've potentially made your situation worse by paying the transfer fee for limited benefit. Always calculate the monthly payment needed to clear the balance in time before transferring.
Balance transfers work best when you have a clear, realistic plan to pay off the full balance within the promotional window. Divide your balance by the number of promo months to find your required monthly payment — if that number fits your budget, a balance transfer can save substantial interest with minimal downside.