Amortization Schedule Calculator Principal Loan Balance: Interest Rate: Amortization Length: Years (typically 30 or 15) Starting: Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Month Year Show full amortization table? No Yes Pre-Payment Method: None: No Pre-payments Monthly: Pre-pay a set amount each month Semiannually: Pre-pay a set amount every 6 months Annually: Pre-pay a set amount once each year One-Time: Pre-pay one set amount after a given # of months Pre-Payment Amount: Monthly/Semi-Annual/Annual/One-Time Principal Pre-Payment Amount One-Time Pre-Payment to be paid after month # (enter month #)