15 Year Fixed Payment Calculator

This 15 Year Fixed Payment Calculator helps you determine your monthly loan payments for a 15-year fixed mortgage. Simply enter your loan amount, interest rate, and down payment to get an accurate calculation.

How to Use This Calculator

Using this calculator is simple:

Enter the loan amount you need (e.g., $200,000)
Input your annual interest rate (e.g., 4.5%)
Specify your down payment amount or percentage
Click "Calculate" to see your monthly payment

The calculator will show you the monthly payment amount, total interest paid over the loan term, and a breakdown of your payments over time.

Formula Used

The calculation uses the standard mortgage payment formula:

Mortgage Payment Formula

Monthly Payment = P × [r(1 + r)^n] / [(1 + r)^n - 1]

Where:

P = Principal loan amount (loan amount - down payment)
r = Monthly interest rate (annual rate / 12)
n = Number of payments (15 years × 12 months)

This formula accounts for the interest on the loan balance each month, which is why a 15-year fixed mortgage typically has lower monthly payments than a 30-year mortgage with the same interest rate.

Worked Example

Let's calculate a monthly payment for a $200,000 loan with a 4.5% interest rate and $20,000 down payment:

Principal = $200,000 - $20,000 = $180,000
Monthly interest rate = 4.5% / 12 = 0.375%
Number of payments = 15 × 12 = 180
Using the formula: Monthly Payment = $180,000 × [0.00375(1 + 0.00375)^180] / [(1 + 0.00375)^180 - 1]
This calculation results in approximately $1,050 per month

Over 15 years, you would pay $1,050 × 180 = $189,000 total, with $9,000 of that being interest.

Interpreting Results

The calculator provides several key pieces of information:

Monthly Payment: The amount you'll pay each month
Total Interest: The total interest paid over the life of the loan
Total Cost: The sum of the principal and interest paid
Amortization Schedule: A chart showing how your payments are applied to principal and interest over time

Key Consideration

A 15-year fixed mortgage typically requires a higher down payment than a 30-year mortgage. Make sure you can afford the monthly payments before committing to this term.

FAQ

What is a 15-year fixed mortgage?

A 15-year fixed mortgage is a home loan with a fixed interest rate that remains the same for the entire 15-year term. This typically results in lower monthly payments than a 30-year mortgage with the same interest rate.

How much down payment do I need for a 15-year mortgage?

Most lenders require at least 10-20% down payment for a 15-year fixed mortgage. The exact requirement depends on your credit score and the lender's policies.

Can I refinance a 15-year mortgage?

Yes, you can refinance a 15-year mortgage, but you'll typically need to meet the lender's requirements for the new loan. Some lenders may require you to have at least 5 years remaining on your current mortgage.