Loan & Mortgage Amortization
Determine monthly mortgage payment, interest vs principal breakdown, and total loan repayment cost.
Mortgage & Loan Parameters
Understanding Mortgage Amortization & Monthly Payment Mathematics
Mortgage calculator computes exact monthly principal and interest payment, total loan cost, amortization breakdown, and early payoff savings on any loan.
The standard fixed-rate amortization equation determines the exact monthly installment needed to amortize a principal loan balance to zero over n periods.
- 1Enter the property purchase price and your down payment amount.
- 2Input the annual interest rate (e.g., 6.5%) and choose your loan duration (e.g., 15 or 30 years).
- 3Optionally include annual property tax, homeowner insurance, and PMI fees.
- 4The calculator computes your fixed monthly payment, full amortization table, and total interest paid over the life of the loan.
A buyer purchases a $400,000 home with a 20% down payment ($80,000), financing $320,000 at a 6.5% interest rate over 30 years (360 months).
Frequently Asked Questions (FAQ)
Fixed-rate mortgages maintain the exact same interest rate and principal/interest payment for the entire term. ARMs offer a lower introductory rate for an initial period (e.g., 5 or 7 years), after which the rate adjusts periodically based on benchmark market indices.
Private Mortgage Insurance (PMI) is required by lenders when conventional down payment is less than 20%. Under the Homeowners Protection Act, PMI must automatically terminate once loan balance reaches 78% of original property value.
It depends on the loan balance and rate, but one extra full payment per year on a typical 30-year mortgage can cut 4-7 years off the loan and save tens of thousands of dollars in interest, since it applies entirely to principal.
Beyond principal and interest, most lenders bundle property tax and homeowners insurance into an escrow account, and PMI if the down payment is under 20% — together these are often abbreviated as PITI.
Top Similar Tools (Finance)
Explore more tools in Finance (5+ more calculators available)
Browse our complete directory with category filters, formulas, and verified engines.