The accounting method of treating revenue from the sale of an asset on installments such that profits are recognized in proportion to the percentage of the sale price collected in a given accounting period. For example, if an asset with a book value of $12,000 is sold for $15,000 and payment is to occur in 5 equal installments of $3,000 each, the seller would record annual profits of ^{($15,000 - $12,000)}/₅ , or $600. The installment method is a conservative way of treating an installment sale because profit is not recognized until receipt of payment.