Mortgage Calculator for 15 Year Fixed

A 15-year fixed mortgage calculator helps you determine your monthly payments, total interest paid, and overall cost of borrowing when you choose a 15-year fixed-rate mortgage. This type of loan offers lower monthly payments compared to a 30-year mortgage, but you'll pay more in interest over the life of the loan.

How the 15-Year Fixed Mortgage Calculator Works

The calculator uses the standard mortgage formula to determine your payments:

M = P [ i(1 + i)^n ] / [ (1 + i)^n - 1 ] Where: M = Monthly payment P = Principal loan amount i = Monthly interest rate (annual rate / 12) n = Number of payments (loan term in years × 12)

For a 15-year fixed mortgage, the term is 180 months. The calculator applies this term along with your interest rate and loan amount to compute your monthly payment.

Key Features of the Calculator

Calculates monthly payments for a 15-year fixed mortgage
Shows total interest paid over the loan term
Displays total amount paid (principal + interest)
Provides an amortization schedule visualization
Allows comparison with 30-year fixed mortgage

Important Note

This calculator provides estimates only. Actual payments may vary based on your lender's specific terms and closing costs. Always consult with a mortgage professional for personalized advice.

How to Use This Mortgage Calculator

Enter your home price (loan amount)
Input your down payment amount or percentage
Provide your estimated interest rate (check with your lender)
Click "Calculate" to see your results
Review the monthly payment, total interest, and amortization chart
Compare with the 30-year fixed option if needed

The calculator will show you:

Your estimated monthly payment
Total interest paid over 15 years
Total amount paid (principal + interest)
A chart showing how your loan amortizes over time

Worked Example

Let's calculate a 15-year fixed mortgage for $300,000 at 4.5% interest:

Monthly interest rate = 4.5% / 12 = 0.375% Number of payments = 15 × 12 = 180 M = $300,000 [ 0.00375(1 + 0.00375)^180 ] / [ (1 + 0.00375)^180 - 1 ] M ≈ $2,104.32

For this example:

Monthly payment: $2,104.32
Total interest paid: $126,500
Total amount paid: $426,500

This shows you'll pay about $2,104 per month for 15 years, with $126,500 going to interest.

Comparison with 30-Year Fixed

Here's how a 15-year fixed mortgage compares to a 30-year fixed mortgage for the same $300,000 loan at 4.5% interest:

Term	Monthly Payment	Total Interest	Total Amount Paid
15 years	$2,104.32	$126,500	$426,500
30 years	$1,537.89	$228,500	$528,500

The 15-year mortgage has higher monthly payments but lower total interest and total amount paid. The 30-year mortgage has lower monthly payments but higher total interest and total amount paid.

Frequently Asked Questions

What is a 15-year fixed mortgage?

A 15-year fixed mortgage is a home loan with a 15-year term where the interest rate remains the same throughout the loan period. This typically results in lower monthly payments compared to a 30-year mortgage.

How does a 15-year fixed mortgage compare to a 30-year fixed?

A 15-year fixed mortgage has higher monthly payments but lower total interest and total amount paid over the life of the loan. A 30-year fixed mortgage has lower monthly payments but higher total interest and total amount paid.

What factors affect my mortgage payment?

Your mortgage payment is affected by the loan amount, interest rate, loan term, and down payment. Higher loan amounts, higher interest rates, and shorter loan terms will result in higher monthly payments.

Can I refinance a 15-year fixed mortgage?

Yes, you can refinance a 15-year fixed mortgage, but you'll need to meet the lender's requirements and qualify for the new loan terms. Refinancing may allow you to lower your interest rate or change your loan term.