A 0% Promo Can Still Have an Upfront Cost
A balance-transfer fee is commonly charged when the balance moves, so a promotional APR of 0% does not necessarily mean the transfer is free. The calculator adds the entered fee and models whether the planned payments clear the balance during the promotional period.
If a balance remains after the promotion, the post-promo rate can materially change the result. New purchases, different grace-period rules and issuer-specific allocation of payments are outside a simplified comparison unless explicitly modeled.
A balance transfer only saves money if the fee and future interest are lower than the interest you avoid on the existing card. The promotional period creates a deadline: if the planned payments do not clear the balance before it ends, the remaining amount may begin accruing interest at a much higher rate. When comparing cards, check whether new purchases receive the same promotional terms and whether the issuer changes grace-period treatment while a transferred balance remains.
Frequently Asked Questions
Why include a transfer fee in a 0% APR comparison?
Because the fee increases the cost or starting balance even when promotional interest is zero.
What matters most about the promo period?
Whether your planned payments can reduce the transferred balance before the promotional rate expires.
What should I calculate before applying for a balance-transfer card?
Work out the transfer fee, the monthly payment needed to clear the balance during the promo period, and the cost if some balance remains when the regular APR begins.
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