How to use this calculator
How to read a mortgage payment
A mortgage payment is usually more than principal and interest. Real housing budgets often combine loan repayment, property taxes, insurance, optional PMI, HOA dues, and other recurring ownership costs.
- Start with home price, down payment, interest rate, and loan term to estimate the base principal-and-interest payment.
- Add taxes, insurance, PMI, HOA dues, and other costs to see a more realistic total monthly housing number.
- Use the advanced section to test annual cost increases and extra payments so you can compare payoff speed, interest saved, and long-term out-of-pocket cost.
Formula / method
Formula / method
Mortgage payments use a standard amortizing-loan method. Principal, rate, term, escrow-style ownership costs, and any extra payments are combined to show the monthly total and the payoff path over time.
- Base mortgage payment follows the standard amortization formula for fixed-rate loans.
- Taxes, insurance, PMI, HOA, and other housing costs are layered onto the monthly total after the loan payment is estimated.
- Extra payments shorten payoff time and reduce total interest inside the same repayment schedule.