Amortization

Amortization (or amortisation) is the process of decreasing, or accounting for, an amount over a period. The word comes from Middle English amortisen to kill, alienate in mortmain, from Anglo-French amorteser, alteration of amortir, from Vulgar Latin admortire to kill, from Latin ad- + mort-, mors death.

When used in the context of a home purchase, amortization is the process by which loan principal decreases over the life of a loan. With each mortgage payment that is made, a portion of the payment is applied towards reducing the principal, and another portion of the payment is applied towards paying the interest on the loan. An amortization table shows this ratio of principal and interest and demonstrates how a loan's principal amount decreases over time.

Amortization is generally known as depreciation of intangible assets of a firm.