15 Year Fixed Mortgage Calculator Refi

Use this 15-year fixed mortgage refinance calculator to determine your potential monthly payments, total interest, and savings when refinancing your home loan. Compare different interest rates and loan terms to make an informed decision about your mortgage refinance.

How to Use This Calculator

To use this 15-year fixed mortgage refinance calculator, follow these simple steps:

Enter your current mortgage balance in the "Current Loan Balance" field.
Input your current interest rate in the "Current Interest Rate" field.
Specify the remaining term of your current mortgage in the "Remaining Term" field.
Enter your desired new interest rate in the "New Interest Rate" field.
Click the "Calculate" button to see your refinance results.

The calculator will display your estimated monthly payment, total interest paid, and potential savings compared to your current mortgage.

Formula Used

The calculator uses the standard mortgage payment formula to calculate your monthly payment:

Mortgage Payment Formula

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

Where:

P = Principal loan amount
r = Monthly interest rate (annual rate divided by 12)
n = Number of payments (loan term in years × 12)

The calculator applies this formula twice: once for your current mortgage and once for the refinance scenario, then compares the results.

Worked Example

Let's look at an example to see how the calculator works. Suppose you have a $200,000 mortgage with a 5-year remaining term at 4.5% interest. You're considering refinancing to a 15-year fixed rate of 3.5%.

Example Scenario

Current Loan Balance: $200,000

Current Interest Rate: 4.5%

Remaining Term: 5 years

New Interest Rate: 3.5%

Using the calculator, you would find:

Current monthly payment: $3,824.46
Refinance monthly payment: $1,543.29
Total interest paid with current mortgage: $19,122.30
Total interest paid with refinance: $12,322.30
Potential savings: $6,800.00

This example shows how refinancing to a 15-year fixed rate can significantly reduce your monthly payments and total interest paid over the life of the loan.

Comparison Table

Here's a comparison of a 15-year fixed refinance versus keeping your current mortgage:

Metric	Current Mortgage	15-Year Refinance
Loan Term	5 years	15 years
Interest Rate	4.5%	3.5%
Monthly Payment	$3,824.46	$1,543.29
Total Interest Paid	$19,122.30	$12,322.30
Total Payments	$219,122.30	$212,322.30

This table clearly shows the benefits of refinancing to a 15-year fixed rate, including lower monthly payments and reduced total interest over the life of the loan.

Frequently Asked Questions

What is a 15-year fixed mortgage refinance?

A 15-year fixed mortgage refinance is when you take out a new 15-year fixed-rate mortgage to pay off your existing home loan. This can help you lower your monthly payments and potentially save on interest over the life of the loan.

How does refinancing to a 15-year fixed rate compare to keeping my current mortgage?

Refinancing to a 15-year fixed rate typically results in lower monthly payments and reduced total interest paid compared to keeping your current mortgage. However, you'll pay the loan off faster, which may not be ideal if you plan to stay in your home for many years.

What factors should I consider before refinancing?

Before refinancing, consider your current interest rate, remaining loan term, credit score, closing costs, and your plans for staying in your home. Also think about how a shorter loan term might affect your overall financial situation.

Are there any risks associated with refinancing?

Yes, there are risks to consider. Refinancing may require you to pay closing costs, and if interest rates rise, you could end up with a higher monthly payment. Also, if you sell your home before the refinance term ends, you may owe more than you would have with your original loan.