Refinance Break-Even Calculator

How to Use This Tool

Enter your current mortgage details: remaining loan balance, interest rate, and years left on the term. Add the new interest rate and term you’re considering for refinancing, plus estimated closing costs for the new loan. Click Calculate to see your break-even point and total savings. Use the Reset button to clear all fields and start over.

Select a common new loan term from the dropdown, or choose Custom to enter a specific term length. All fields require valid positive numbers to run calculations.

Formula and Logic

The break-even point is calculated by dividing total refinance closing costs by the monthly savings from your new loan payment:

• Monthly Payment = Current Loan Balance × [ (Monthly Interest Rate × (1 + Monthly Interest Rate)^Number of Payments) / ( (1 + Monthly Interest Rate)^Number of Payments - 1) ]
• Monthly Savings = Current Monthly Payment - New Monthly Payment
• Break-Even Months = Total Closing Costs / Monthly Savings

Total interest savings compare the total interest paid over the remaining current loan term versus the total interest paid over the full new loan term. Net savings subtract closing costs from total interest savings.

Practical Notes

Closing costs typically range from 2% to 5% of the new loan amount, including origination fees, appraisal fees, title insurance, and prepaid taxes. If you plan to move before the break-even point, refinancing may not be cost-effective.

Consider that a shorter new loan term will have higher monthly payments but lower total interest, while a longer term reduces monthly payments but increases total interest. Check if your current loan has prepayment penalties that apply if you refinance early.

• Interest rate quotes may include discount points, which are upfront fees to lower your rate—factor these into closing costs.
• Federal tax deductions for mortgage interest apply only to interest paid, so lower interest from refinancing may reduce your tax deduction.
• Break-even calculations assume you keep the new loan for the full break-even period without making extra payments.

Why This Tool Is Useful

Refinancing often involves thousands of dollars in upfront fees, so it’s critical to know how long it will take to recoup those costs through lower monthly payments. This tool eliminates guesswork by showing exact break-even timelines and total long-term savings.

It helps you compare different loan term options side by side, so you can choose a refinance structure that fits your budget and financial goals. You can also copy results to share with lenders or financial planners for further review.

Frequently Asked Questions

What if my new loan has a higher monthly payment?

If your new loan term is shorter than your remaining current term, monthly payments may increase even with a lower interest rate. This tool still calculates total interest savings, which may outweigh higher monthly costs if you plan to stay in the home long-term.

Do I include cash-out amounts in the loan balance?

This tool assumes you refinance only your remaining current balance. If you take cash out, add the cash-out amount to the current loan balance field to reflect the total new loan amount.

How accurate are the interest savings estimates?

Estimates assume fixed interest rates for the full loan term and no extra payments. Adjustable-rate mortgages (ARMs) or extra principal payments will change actual interest costs, so use this as a baseline for fixed-rate refinance scenarios.

Additional Guidance

Get quotes from multiple lenders to compare closing costs and interest rates—small differences in rates can add up to thousands in savings over a 30-year term. Consider your long-term housing plans: if you expect to move within 5 years, a refinance with a 7-year break-even point will not save you money.

Check your credit score before applying for a refinance, as higher scores qualify for lower interest rates. You can also use this tool to test "what-if" scenarios, like how a 0.5% rate drop would affect your break-even timeline.