30 to 15 Year Mortgage Refinance Calculator

How to Use This Calculator

To use this calculator, enter your current mortgage details including the original loan amount, current interest rate, remaining term, and the new interest rate you're considering. The calculator will show you your estimated monthly payments and total interest paid under both scenarios.

Input Fields

• Original Loan Amount: The total amount of your current mortgage.
• Current Interest Rate: The annual percentage rate (APR) on your current mortgage.
• Remaining Term: How many years are left on your current mortgage.
• New Interest Rate: The APR you're considering for your refinance.

Output Fields

• Current Monthly Payment: Your estimated monthly payment under your current mortgage terms.
• New Monthly Payment: Your estimated monthly payment if you refinance to a 15-year term.
• Total Interest Paid: The total interest you'll pay over the life of the loan under both scenarios.
• Potential Savings: The difference in total interest paid between the two scenarios.

Formula Used

The calculator uses the standard mortgage payment formula to calculate monthly payments and total interest:

Total Interest Paid = (Monthly Payment * n) - P

The calculator compares these values for both your current mortgage and the refinance scenario with a 15-year term.

Worked Example

Let's look at an example to see how refinancing from a 30-year to a 15-year term can save you money.

Scenario

• Original Loan Amount: $200,000
• Current Interest Rate: 6.5%
• Remaining Term: 25 years
• New Interest Rate: 5.5%

Current Mortgage (30-year term)

• Monthly Payment: $1,225.64
• Total Interest Paid: $331,644

Refinance to 15-year term

• Monthly Payment: $1,602.88
• Total Interest Paid: $241,440

Comparison

• Increased Monthly Payment: $377.24
• Reduced Total Interest: $90,204
• Loan Paid Off Earlier: 15 years instead of 30

In this example, refinancing to a 15-year term would save you $90,204 in interest over the life of the loan, but you would pay $377.24 more each month.

Benefits of Refinancing to a 15-Year Term

Refinancing to a shorter term can offer several advantages:

Lower Monthly Payments

While your monthly payments will increase, you'll be paying them off much faster, which can help you build equity more quickly and potentially qualify for better interest rates in the future.

Reduced Interest Costs

Paying off your mortgage sooner means you'll pay less in total interest over the life of the loan, which can save you thousands of dollars.

Improved Cash Flow

With a shorter term, you'll have more disposable income each month as you approach the end of your loan, which can be useful for other financial goals.

Potential Tax Benefits

In some cases, refinancing may qualify for tax benefits, such as the mortgage interest deduction.

Key Considerations Before Refinancing

Before deciding to refinance, consider these important factors:

Closing Costs

Refinancing typically involves closing costs, which can range from 2% to 5% of the loan amount. Make sure you factor these costs into your decision.

Credit Score

Your credit score will affect the interest rate you qualify for. A higher score can help you secure a better rate.

Market Conditions

Interest rates fluctuate, so it's important to time your refinance carefully. You may want to wait for rates to drop before refinancing.

Loan-to-Value Ratio

Your lender will consider your loan-to-value ratio (LTV) when determining your eligibility. A lower LTV may qualify you for better rates.

Future Plans

Consider your long-term financial goals. If you plan to stay in your home for many years, a shorter term may not be the best option.