Refinance Calculator From 30 Year to 15 Year

Use this refinance calculator to estimate your potential savings when switching from a 30-year mortgage to a 15-year mortgage. Compare monthly payments, total interest paid, and payoff dates to make an informed decision about refinancing.

How to Use This Calculator

Enter your current mortgage details and the new loan terms you're considering. The calculator will show you:

Monthly payment comparison
Total interest paid over the life of the loan
Payoff date for both loan terms
Potential savings from refinancing

This tool provides estimates only. Actual savings may vary based on your specific financial situation and current market rates.

How Refinancing Works

Refinancing means replacing your existing mortgage with a new loan. When you refinance from a 30-year term to a 15-year term, you're essentially:

Paying off your current mortgage
Taking out a new loan with a shorter term
Typically getting a lower interest rate

Mortgage Payment Formula

The monthly payment (P) is calculated using the formula:

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

Where:

L = Loan amount
r = Monthly interest rate (annual rate ÷ 12)
n = Number of payments (loan term in years × 12)

Refinancing to a 15-year term typically results in higher monthly payments but can save you thousands in interest over the life of the loan.

Example Calculation

Let's look at an example with a $200,000 mortgage:

Term	Interest Rate	Monthly Payment	Total Interest Paid	Payoff Date
30 years	4.5%	$1,073.64	$222,472	2045
15 years	4%	$1,345.28	$132,784	2030

In this example, refinancing saves $89,688 in interest over 15 years, but requires higher monthly payments.

30-Year vs 15-Year Comparison

Here's a comparison of key factors when refinancing from a 30-year to a 15-year mortgage:

Factor	30-Year Mortgage	15-Year Mortgage
Monthly Payment	Lower	Higher
Total Interest Paid	Higher	Lower
Payoff Date	Later	Earlier
Cash Flow Impact	Lower monthly payments	Higher monthly payments
Interest Rate Sensitivity	Less sensitive	More sensitive

Consider your financial situation carefully. While a 15-year mortgage can save you money on interest, the higher monthly payments may not be feasible for everyone.

Frequently Asked Questions

How much can I save by refinancing to a 15-year term?

Savings vary based on your loan amount, current interest rate, and the new rate you qualify for. The calculator provides estimates, but actual savings depend on your specific financial situation.

Will refinancing to a 15-year term increase my monthly payments?

Yes, typically. A 15-year mortgage has higher monthly payments than a 30-year mortgage with the same loan amount and interest rate. The calculator shows the exact payment difference.

What are the closing costs for refinancing?

Closing costs typically range from 2% to 5% of the loan amount. These can include appraisal fees, title insurance, and other fees. The calculator doesn't include closing costs, but you should factor them into your decision.

Can I refinance if I have a bad credit score?

It's more difficult but possible. Some lenders offer refinancing options for borrowers with lower credit scores, though they may charge higher interest rates or require larger down payments.