Loan Amortization
#N amount (by period), or YYYY-MM/YYYY-MM-DD + amount.1467.05 per period2056-03-09 at period 360228138.55528138.55228138.550About Loan Amortization
Builds a fixed-payment amortization schedule under nominal APR and a chosen payment frequency. Extra payments (fixed each period or one-off) go directly to principal and shorten payoff time and total interest.
Formulas
- Rate per period:
i = APR / m, periods:N = years ร m, where m is payments per year. - Payment (PMT):
PMT = Pยทi / (1 โ (1+i)^{-N})(ifi=0, thenP/N). - Each period: interest =
balance ยท i; principal =PMT โ interest.
If the custom payment is โค interest for a period, the balance grows (negative amortization), which this tool will flag as invalid.