Mortgage Calculator
Estimate your monthly mortgage payment including principal, interest, taxes, insurance, PMI, and HOA.
How to Use This Mortgage Calculator
Enter your home price and down payment to see your loan amount. Pick a loan term and interest rate, then expand the optional section to add property tax, home insurance, PMI, and HOA fees for a complete PITI (Principal, Interest, Tax, Insurance) estimate.
What's included in your monthly payment?
- Principal & Interest (P&I): The core loan repayment that pays down your mortgage balance.
- Property Tax: Annual local tax on your home, divided by 12 and usually escrowed by your lender.
- Home Insurance: Required by lenders. Average US homeowners insurance is around $1,400–$1,800/year.
- PMI: Private Mortgage Insurance. Required when your down payment is less than 20% on a conventional loan.
- HOA Fees: Common in condos, townhomes, and planned communities.
How is mortgage interest calculated?
Standard fixed mortgages use the formula:
M = P × [r(1+r)n] / [(1+r)n − 1]
Where M is monthly payment, P is loan principal, r is monthly interest rate (APR ÷ 12), and n is total number of payments (years × 12). Most of your early payments go toward interest; principal builds up over time.
30-year vs 15-year mortgage
A 30-year mortgage has lower monthly payments but you pay much more in total interest. A 15-year mortgage typically has a lower interest rate and saves tens of thousands in interest, but the monthly payment is significantly higher. Use this calculator to compare both terms with your numbers.
How much house can I afford?
A common rule is the 28/36 rule: spend no more than 28% of gross monthly income on housing (PITI), and no more than 36% on total debt. Lenders may approve higher, but staying conservative helps with savings, emergencies, and lifestyle.