Bank Credit Card Promo Balance Payment Allocation Silently Accrues Hidden Interest
Customers who use promotional convenience checks assume their regular monthly payments reduce the interest-free balance, but banks apply payments to non-promo charges first, leaving the promo balance untouched and accruing fees. The promo offer buries the fee structure in fine print, ensuring most customers discover the problem only after interest accumulates. This payment allocation method is structurally designed to maximize bank revenue at the expense of customers who believe they are managing their balances correctly.
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