How to Calculate Mortgage Payment
Learn how to calculate your monthly mortgage payment, understand amortization, and see how down payments and loan terms affect your payments.
Understanding Mortgage Payments
A mortgage payment is typically the largest monthly expense for homeowners. Understanding how it's calculated helps you make informed decisions about home buying, refinancing, and budgeting.
Mortgage payments consist of principal (the loan amount), interest (the cost of borrowing), and often include property taxes and insurance in an escrow account.
The Mortgage Payment Formula
M = P × [r(1+r)^n] / [(1+r)^n - 1]
Standard formula for calculating monthly mortgage payments
Key Components of a Mortgage Payment
🏠 Principal
The loan amount you borrowed
💰 Interest
The cost of borrowing money
📋 Property Taxes
Often included in monthly payment
🛡️ Insurance
Homeowners and PMI insurance
How Down Payment Affects Your Payment
A larger down payment:
- Reduces your loan amount, lowering monthly payments
- Decreases total interest paid over the life of the loan
- May help you avoid Private Mortgage Insurance (PMI)
- Can qualify you for better interest rates
Fixed vs. Variable Rate Mortgages
Fixed-Rate Mortgage
Interest rate stays the same for the entire loan term.
- Predictable payments
- Protection from rate increases
- Typically higher initial rate
Variable-Rate Mortgage
Interest rate can change based on market conditions.
- Lower initial rate
- Payments can increase
- More risk and uncertainty
Amortization: How Payments Change Over Time
In the early years of your mortgage:
Interest Portion
~70-80%
Principal Portion
~20-30%
As you pay down the loan, more of each payment goes toward principal and less toward interest. This is called amortization.
Try the Calculator
Mortgage Calculator
Estimate your monthly mortgage payment, total interest, and full home ownership cost. Includes taxes, insurance, HOA, and extra payment impact.
How to: Enter the home price - the total purchase price of the home you want to buy
Loan Payment Calculator
Calculate your loan payment, total interest, and repayment cost. Estimate monthly payments for personal loans, auto loans, and mortgages.
How to: Enter the loan amount - the total amount you are borrowing (principal)
Loan Overpayment Calculator
See how much interest you overpay on a loan and how to reduce it. Calculate total interest cost and savings from extra payments.
How to: Enter the loan amount - the total amount you borrowed