Business cards are built on one of two models. A business credit card gives the business a credit limit and lets the balance be repaid over time: pay the closing balance in full and no interest is charged on purchases, carry part of it and interest accrues at the card’s purchase rate. A charge card gives credit only until the statement due date: the full balance is due each statement period, no interest applies to purchases paid on time unless part of the balance is moved to a pay-over-time facility, and a late payment fee applies if the balance is not cleared on time.
That difference shapes everything else about the two products. A credit card can smooth a gap between paying suppliers and being paid by customers for longer than one statement cycle, at the cost of interest. A charge card is built to be cleared each cycle, and where it can carry part of a balance it does so through a separate pay-over-time facility with its own limit and interest rate, which is why charge card issuers can offer flexible spending capacity instead of a fixed limit and why charge cards are aimed at businesses that run high monthly spend and clear it every cycle.