Mortgage Payment Calculator
Estimate the pieces of a monthly housing payment. This planning estimate is not a lender quote.
Estimate your payment
Principal + interest—
Property tax—
Insurance—
HOA—
PMI—
Loan amount—
Total loan interest—
Total principal + interest—
Monthly principal and interest use a fixed-rate, fully amortizing loan with end-of-month payments. Taxes, insurance, HOA and PMI are entered estimates.
Formula and assumptions
The monthly principal-and-interest payment is P × r(1+r)n / ((1+r)n−1), where P is the loan amount, r is the monthly rate and n is the number of payments. At 0% interest, payment is principal divided by months. Escrowed costs are added separately and can change over time.
What the estimate leaves out
Closing costs, points, lender fees, changing taxes and insurance, adjustable rates and lender-specific PMI rules are not modeled. Enter a PMI estimate only when relevant and verify every figure with a lender.
Method references
The payment model follows the U.S. Consumer Financial Protection Bureau’s mortgage-payment guidance. The formula and fixed-rate scope are independently cross-checked against Bankrate’s published amortization formula. Reviewed September 16, 2026.