This is the definition of "credit" purchases, forms of which include typical credit cards and installment loans.

Installment A/r(dr)

Installment sales(cr)

Monthly installment plan

installment

or, better, if you're English instalment.

An individual buying securities on margin and buying merchandise on an installment plan have an important feature in common. The commonality is based on the fact that in each of these transactions, interest is charged and must be paid. Generally speaking, the interest is paid when buying on margin upon the sale of the securities. Buying on margin is usually a short term arrangement. With an installment plan, the interest is usually built into the monthly payments. These payments can be over an extended amount of time.