Mortgage Calculator

Estimate a monthly mortgage payment including taxes and insurance. Enter the home price, down payment, rate, and term.

Monthly Payment
Including taxes and insurance.

Usage Tip

Lenders often cap total housing cost near 28% of gross monthly income. Compare offers by APR, which folds in fees, not just the headline rate.

THE MATH
Loan = price − down payment
Monthly P and I = loan × i(1+i)^N ÷ ((1+i)^N − 1)
Total monthly = P and I + (tax + insurance) ÷ 12
A mortgage payment is principal and interest plus, often, escrowed property tax and homeowners insurance (PITI).
A larger down payment shrinks the loan and may remove private mortgage insurance (PMI).
A down payment under 20% usually adds PMI, which is not included here.
Property tax and insurance vary widely by location and are taken from your annual figures.
Most interest is paid in the early years, so early extra principal payments save the most.
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The calculators and tools on Formula Factory are provided for general guidance and informational purposes only. Results are estimates based on standard formulas and the values you enter — they do not constitute professional engineering, electrical, or architectural advice. Always verify calculations with a qualified professional before making decisions for any safety-critical, code-compliance, or commercial application. Formula Factory makes no representations or warranties as to the accuracy or completeness of any result, and accepts no liability for errors, omissions, or any outcomes arising from reliance on this information.