Work out credit card balance transfer instantly with clear inputs, formula shown and shareable results.
A balance transfer swaps an interest-bearing card balance for a promotional period at zero or low rate, in exchange for an upfront fee. The transfer pays only if the interest avoided over the promo exceeds that fee — and only if the balance clears before the promo ends.
Transfer test
Net saving = Σ(balance × monthly APR over promo) - balance × fee%
Figures are estimates. Lenders apply their own rounding, fees and eligibility rules, and rates change. This is not financial advice — confirm the numbers with your lender.
The residual reverts to the new card's standard rate, which can undo the whole saving.
Often not. Purchases may accrue at the normal rate and payments may be applied to the promo balance first.