Amortization is the schedule of regular payments that reduces a loan balance over time. Each payment covers (a) interest on the outstanding balance and (b) a portion of principal. In early months, most of the payment is interest; in later months, most is principal.
The amortization formula
Standard equipment-loan amortization uses the formula:
Payment = P * [r(1+r)^n] / [(1+r)^n – 1]
Where P = loan amount, r = monthly interest rate (APR / 12), n = number of monthly payments. The calculators on this site use this formula.
Amortization schedule
A breakdown of each monthly payment into interest and principal portions, with the running balance after each payment. Useful for tax planning (you can deduct interest separately from principal repayment) and for understanding the true cost of the loan over time.
Fully amortizing vs partial amortizing
A fully amortizing loan reaches a zero balance at maturity. A partial amortizing loan has a balloon payment at maturity because the regular payments do not pay it off entirely.
Early payoff
Most equipment loans allow prepayment, sometimes with a small prepayment fee or “simple interest pay-off discount” that recalculates interest on the actual time outstanding. Check your loan agreement.
