User-operated instrument

Amortization schedule

Full principal-and-interest schedule, plus what one extra payment a year does to term and interest.

Loan principalRequiredAnnual interest rateRequired%Nominal annual rate. Default example: 6.50%.Term (months)Required360 = 30 years. Whole months only.Extra payment once per yearOptionalApplied on months 12, 24, … Default: $0 (no extra).

Live model

Entered-value results

Enter loan principal, annual rate, and term in months. Optional: one extra payment per year (applied on each anniversary month).

Estimate only — informational output from the values entered here. Not a quote, guarantee, or approval. No database record is created.