Refinance 15 Year Mortgage Rates Calculator

Use this calculator to determine the best 15-year mortgage refinance rates for your situation. Compare current rates with your existing mortgage to see if refinancing could save you money over the life of the loan.

How to Use This Calculator

Enter your current mortgage details and the new 15-year mortgage rate you're considering. The calculator will show you the estimated monthly payment and total interest paid over the life of the loan.

Key inputs include:

Current mortgage balance
Current interest rate
New 15-year mortgage rate
Loan term (15 years)

After entering your details, click "Calculate" to see the results. You can then compare the new payment with your current one to determine if refinancing makes financial sense.

Formula Used

The calculator uses the standard mortgage payment formula:

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)

This formula calculates the fixed monthly payment required to pay off the loan over the specified term.

Worked Example

Let's say you have a $200,000 mortgage with a current rate of 4.5% and you're considering refinancing to a new 15-year rate of 3.5%.

Using the formula:

Monthly rate = 3.5% / 12 = 0.0029167 Number of payments = 15 × 12 = 180 M = $200,000 [ 0.0029167(1 + 0.0029167)^180 ] / [ (1 + 0.0029167)^180 - 1 ] M ≈ $1,225.34 per month

This means your monthly payment would be approximately $1,225.34 for a 15-year term at 3.5%.

Refinancing Guide

When to Consider Refinancing

Refinancing to a 15-year mortgage can be beneficial if:

Your current interest rate is significantly higher than current 15-year rates
You plan to stay in your home for less than 15 years
You want to pay off your mortgage faster
You have good credit and can qualify for a lower rate

Potential Downsides

Consider these factors before refinancing:

Closing costs (typically 2-5% of the loan amount)
Impact on credit score (hard inquiry)
Risk of rising interest rates if you refinance to a variable rate
Potential for higher monthly payments if rates increase

Comparison Table

Term	Monthly Payment	Total Interest	Total Cost
15 years	$1,225.34	$12,253.40	$212,253.40
30 years	$879.58	$134,934.00	$334,934.00

Note: These are example calculations based on a $200,000 loan at 3.5% interest. Actual results may vary based on your specific circumstances.

Next Steps

If refinancing seems beneficial, follow these steps:

Check your current mortgage terms and eligibility
Compare rates from multiple lenders
Consider closing costs and fees
Get pre-approved for the new loan
Consult with a financial advisor if needed

Frequently Asked Questions

How does refinancing to a 15-year mortgage affect my monthly payments?

Refinancing to a 15-year term typically results in higher monthly payments compared to a 30-year mortgage. However, you'll pay off the loan faster and save on total interest costs.

What are the closing costs for refinancing?

Closing costs for refinancing usually range from 2% to 5% of the loan amount. Common fees include appraisal fees, title insurance, and origination fees.

Can I refinance if I have a variable-rate mortgage?

Yes, you can refinance a variable-rate mortgage to a fixed-rate 15-year term. However, be aware that interest rates may change, affecting your monthly payments.

How long does the refinancing process take?

The refinancing process typically takes 30 to 45 days, though this can vary depending on your lender and the complexity of your situation.

What happens if interest rates rise after refinancing?

If you refinance to a fixed-rate 15-year mortgage, your interest rate will remain the same for the life of the loan. If you refinance to an adjustable-rate mortgage, your rate could change over time.