How to Use This Calculator
- 1
Enter Current Loan Balance
Input the remaining balance on your existing mortgage.
- 2
Specify Current Interest Rate
Provide the annual interest rate of your current mortgage.
- 3
Set Remaining Term
Indicate how many years are left on your current mortgage loan.
- 4
Input New Loan Amount
Enter the total amount you plan to borrow with the new mortgage.
- 5
Specify New Interest Rate
Provide the annual interest rate offered on the new mortgage.
- 6
Set New Loan Term
Indicate the term length for the new mortgage in years.
- 7
Include Closing Costs
Enter the estimated fees and costs associated with refinancing (e.g., appraisal, origination).
- 8
Confirm Payments Per Year
Enter the number of payments made each year (typically 12 for monthly).
- 9
Review your results
The calculator displays your monthly savings, break-even point, lifetime savings, and an insights panel with interest comparison and term extension analysis. Scroll down for the balance comparison chart and amortization schedule.
Example Calculation
A homeowner with a $250,000 balance at 6.5% over 25 years is considering refinancing to a 5.0% rate for 30 years with $5,000 in closing costs.
Current Loan Balance ($)
250,000
Current Interest Rate (%)
6.5
Remaining Term (years)
25
New Loan Amount ($)
250,000
New Interest Rate (%)
5.0
New Loan Term (years)
30
Closing Costs ($)
5,000
Payments Per Year
12
Results
Monthly Savings
$345.96
Current Payment
$1,688.02
New Payment
$1,342.05
Break-Even
15 months
Lifetime Savings
$18,265.91
Tips
Calculate Your Break-Even Point
Always determine how many months it will take for your monthly savings to offset the closing costs. With default inputs, the break-even is 15 months — if you plan to sell or refinance again before this point, refinancing may not be financially beneficial.
Shop for the Best Rate and Fees
Obtain quotes from multiple lenders. Compare the Annual Percentage Rate (APR) to account for all fees. Even in 2026, rates vary significantly between lenders, so diligent shopping can yield substantial savings.
Consider the Term Extension Trade-off
Refinancing from a 25-year remaining term to a 30-year loan extends your debt by 5 years. While monthly payments drop by $345.96, you'll pay $233,139 in interest on the new loan vs. $256,405 on the current loan. Use the insights panel to weigh this trade-off.
Strategic Mortgage Refinancing for Financial Advantage
The Mortgage Refinance Calculator empowers homeowners to analyze the true financial impact of replacing their current mortgage with a new one. This tool compares current loan terms against potential new ones and factors in closing costs to determine if refinancing will genuinely save money.
For example, a homeowner with a $250,000 balance at 6.5% over 25 years could refinance to 5.0% over 30 years, saving $345.96 monthly. With $5,000 in closing costs, the break-even point is 15 months, and lifetime savings reach $18,265.91. This clear financial comparison is vital for making smart housing decisions in 2026.
Key Considerations Before Refinancing Your Home
Refinancing your home is a significant financial decision that requires careful planning. Before committing, assess your current interest rate relative to prevailing market rates; if you can secure a rate 1-2 percentage points lower, the savings are often compelling.
Consider your remaining loan term and how a new loan term might affect total interest paid, even if monthly payments decrease. Crucially, account for all closing costs, which typically range from 2% to 5% of the loan amount. A refinance should align with your long-term financial goals, whether that's reducing monthly expenses, building equity faster, or accessing cash.
The Refinance Comparison Logic
The Mortgage Refinance Calculator performs a detailed side-by-side analysis of your current mortgage versus a proposed new mortgage.
It calculates the monthly payment and total interest for both loans, then factors in closing costs to determine the true lifetime financial benefit and the break-even point.
Current Monthly Payment = Current Loan Balance × [Current Monthly Rate × (1 + Current Monthly Rate)^Current Total Payments] / [(1 + Current Monthly Rate)^Current Total Payments - 1]
New Monthly Payment = New Loan Amount × [New Monthly Rate × (1 + New Monthly Rate)^New Total Payments] / [(1 + New Monthly Rate)^New Total Payments - 1]
Break-Even Point (months) = Closing Costs / (Current Monthly Payment - New Monthly Payment)
Lifetime Savings = (Current Monthly Payment × Current Total Payments) - (New Monthly Payment × New Total Payments) - Closing Costs
Here, Monthly Rate is the annual rate divided by 12, and Total Payments is the term in years multiplied by 12.
Analyzing a Mortgage Refinance Scenario
Let's evaluate a homeowner with a current loan balance of $250,000 at a 6.5% interest rate, with 25 years remaining.
They are considering refinancing to a new $250,000 loan at a 5.0% interest rate for 30 years, with estimated closing costs of $5,000.
- Calculate Current Monthly Payment: For a $250,000 balance at 6.5% over 300 months, the current monthly payment is $1,688.02.
- Calculate New Monthly Payment: For a $250,000 loan at 5.0% over 360 months, the new monthly payment is $1,342.05.
- Determine Monthly Savings: The monthly payment saving is $1,688.02 - $1,342.05 = $345.96.
- Calculate Break-Even Point: With $5,000 in closing costs and $345.96 in monthly savings, the break-even point is $5,000 / $345.96 = 15 months (approximately 1.3 years).
- Calculate Lifetime Savings: Total current cost ($506,405.37) minus total new cost ($488,139.46) = $18,265.91 in lifetime savings.
This analysis provides a clear financial roadmap for the homeowner's refinancing decision.
Refinance Options: Rate-and-Term vs. Cash-Out
When refinancing, homeowners typically choose between two main types: a rate-and-term refinance or a cash-out refinance. A rate-and-term refinance primarily aims to change the interest rate, the loan term, or both, without increasing the loan amount beyond what's needed to cover the existing mortgage and closing costs.
In contrast, a cash-out refinance allows homeowners to borrow more than their current mortgage balance, converting a portion of their home equity into liquid cash. While this provides funds for renovations, debt consolidation, or other investments, it increases the loan amount and can extend the repayment period, impacting long-term interest costs. The choice depends on specific financial goals and the equity available in the home.
Frequently Asked Questions
What is mortgage refinancing and why do people do it?
Mortgage refinancing involves replacing your existing mortgage with a new one, typically to secure a lower interest rate, reduce monthly payments, or change the loan term. Homeowners often refinance to save money on interest, convert an adjustable-rate mortgage to a fixed rate for stability, or access home equity through a cash-out refinance.
How do closing costs affect a mortgage refinance?
Closing costs typically range from 2% to 5% of the new loan amount and directly impact the break-even point. For example, with $5,000 in closing costs and $345.96 in monthly savings, it takes 15 months to break even. These fees include appraisal, origination, title insurance, and legal costs.
What is the break-even point in a refinance?
The break-even point is the number of months it takes for monthly savings to recoup closing costs. For example, $5,000 in closing costs divided by $345.96 in monthly savings equals approximately 15 months. If you move or refinance again before this point, you will not have realized a net financial benefit.
When is the best time to refinance a mortgage?
The best time to refinance is generally when interest rates are significantly lower than your current rate (typically 1-2 percentage points), allowing for substantial monthly savings and a quick break-even point. Also consider refinancing when your credit score has improved or when you need to switch loan types (e.g., from ARM to fixed).
How does the insights panel help me evaluate a refinance?
The insights panel shows your break-even timeline, total interest comparison between current and new loans, and the impact of extending your loan term. It also includes a breakdown bar comparing the total cost of each loan, helping you visualize the full financial picture beyond just monthly payment savings.