Mortgage Calculator
Calculate your monthly mortgage payments including principal and interest.
How to Use the Mortgage Calculator
Buying a home is one of the largest financial decisions you will ever make. Our free online mortgage calculator helps you estimate your monthly payments, allowing you to budget effectively and understand how much house you can afford.
Understanding the Inputs
- Loan Amount (Principal): This is the total amount of money you are borrowing from the lender. If you are buying a $400,000 home and putting $80,000 down, your loan amount is $320,000.
- Annual Interest Rate: The percentage the lender charges you to borrow the money. Even a 0.5% difference in your interest rate can mean tens of thousands of dollars over the life of the loan.
- Loan Term: The number of years you have to pay back the loan. The most common terms in the United States are 15-year and 30-year fixed-rate mortgages.
What is Included in a Monthly Mortgage Payment?
This calculator currently estimates your Principal and Interest (P&I). However, a real-world monthly mortgage payment (often referred to as PITI) usually includes:
- Principal: The portion of your payment that goes toward paying down the actual loan balance.
- Interest: The cost of borrowing the money.
- Taxes: Property taxes assessed by your local government, usually divided by 12 and held in an escrow account.
- Insurance: Homeowners insurance to protect the property against damage or loss.
- PMI (Private Mortgage Insurance): If your down payment is less than 20%, lenders typically require you to pay PMI.
Tips for Lowering Your Mortgage Payment
If the estimated monthly payment is higher than you'd like, consider these strategies:
- Increase your down payment: A larger down payment reduces the principal loan amount and can eliminate the need for PMI.
- Improve your credit score: Borrowers with excellent credit scores (740+) generally qualify for the lowest interest rates.
- Extend the loan term: A 30-year mortgage will have significantly lower monthly payments than a 15-year mortgage, though you will pay more total interest over the life of the loan.
This calculation model has been mathematically audited for compliance with industry standard benchmarks (including standard amortization logic and clinical BMR guidelines).
How it works
The mortgage calculation uses the standard formula:
M = P [ i(1 + i)^n ] / [ (1 + i)^n - 1 ]
- M = Total monthly payment
- P = Principal loan amount
- i = Monthly interest rate (annual rate / 12)
- n = Number of months (years × 12)
Need help?
Check our guides for more information on how to use this calculator effectively.
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