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Mortgage Calculator: Estimate Your Monthly Payment

Learn how to estimate your monthly mortgage payment and understand all the costs involved in buying a home.

By WebGuysLLC  ·  Updated April 2026  ·  8 min read
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Buying a home is likely the biggest financial decision you will ever make. Understanding your monthly mortgage payment is key to budgeting properly and avoiding surprise costs.

What Goes Into a Mortgage Payment?

A monthly mortgage payment is not just the loan repayment. It typically includes several components often abbreviated as PITI:

Principal

The portion of your payment that goes toward paying down the original loan amount. This is how you build equity in your home.

Interest

The cost of borrowing the money. This is the lender's profit. The interest rate you get depends on your credit score, down payment, and current market conditions.

Property Taxes

Local taxes based on your home's assessed value. These vary by location and are usually collected monthly as part of your mortgage payment and held in an escrow account.

Homeowners Insurance

Required by lenders to protect your investment. This protects you financially if your home is damaged or destroyed.

Example: A $400,000 home with 20% down at 6.5% interest: Your P&I payment is $2,024. Add $400 monthly property tax and $125 insurance, and your total monthly payment is $2,549.

Factors That Affect Your Payment

Home Price

The higher the home price, the higher your mortgage and monthly payment. Your down payment reduces the amount you need to borrow.

Down Payment

Putting down 20% or more avoids private mortgage insurance (PMI), which is an extra monthly cost. However, there are loan programs that allow lower down payments.

Interest Rate

Even a small difference in interest rate can mean tens of thousands of dollars over a 30-year loan. Shopping around and improving your credit score can help you get a better rate.

Loan Term

Shorter terms like 15 years have higher monthly payments but significantly less total interest. Longer terms like 30 years have lower payments but cost more over time.

Using a Mortgage Calculator

Our free mortgage calculator helps you see the full picture. Enter the home price, down payment, interest rate, and loan term. The calculator shows your monthly P&I payment. You can also add property taxes and insurance for a complete picture.

The calculator also shows total interest paid over the life of the loan. This helps you understand the true cost of borrowing.

How to Get the Best Rate

Here are some tips to qualify for the best mortgage rate:

Calculate Your Payment

Use our free mortgage calculator to estimate your monthly payment and total costs.

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