Refinance Break Even Calculator
Calculation Results
What Is a Refinance Break Even Calculator?
A Refinance Break Even Calculator is a tool that estimates how many months it may take for a refinance to pay back its closing costs through monthly payment savings. It uses your current loan balance, current interest rate, remaining term, new interest rate, new loan term, and refinance closing costs.
This refinance break even calculator answers one main question: how long will it take for the lower monthly principal and interest payment to recover the upfront closing costs? It compares the current payment with the new payment, calculates the monthly savings, and divides closing costs by those savings.
The result is an estimate, not a final refinance decision. It can help homeowners compare a possible refinance against how long they plan to keep the loan. The calculator does not include taxes, homeowners insurance, mortgage insurance, escrow changes, lender fees beyond the entered closing costs, or cash-out changes.
How the Refinance Break Even Formula Works
The calculator first estimates the current monthly principal and interest payment. It then estimates the new monthly principal and interest payment using the same loan balance. If the interest rate is greater than 0%, it uses the standard fixed-payment loan formula.
In this formula, PMT is the monthly principal and interest payment. P is the loan balance. r is the annual interest rate divided by 100 and then divided by 12. n is the loan term in years multiplied by 12.
If the interest rate is 0%, the calculator uses a simpler payment method: loan balance divided by the number of months. After both payments are calculated, the monthly savings are found by subtracting the new payment from the current payment.
For example, suppose your current loan balance is $300,000, your current interest rate is 6.5%, and you have 25 years left. Your current principal and interest payment is about $2,025.62. If the new rate is 5.5% for 30 years, the new payment is about $1,703.37.
The estimated monthly savings are $322.25. With $5,000 in refinance closing costs, the break even time is $5,000 divided by $322.25, or about 15.52 months. The calculator displays this as 1 year 4 months, because it rounds the remaining months up in the displayed duration.
If the new payment is not lower than the current payment, the calculator shows monthly savings as $0.00 and displays Never (No Savings). If required inputs are blank or not valid numbers, it does not show a new result. If closing costs are left blank, the calculator uses the built-in default value of $3,000.
How to Use the Refinance Break Even Calculator: Step by Step
- Enter your Current Loan Balance. This is the remaining mortgage balance used for both the current and new loan payment estimates.
- Enter your Current Interest Rate. Use the annual interest rate on your current mortgage, shown as a percentage.
- Enter the Remaining Term on Current Loan in years. This tells the calculator how many months are left on your current mortgage.
- Enter the New Interest Rate. This is the annual rate you expect on the refinance loan.
- Enter the New Loan Term in years. This may be the same as your current remaining term or a different term.
- Enter your Refinance Closing Costs. If you leave this field blank, the calculator uses $3,000 as the closing cost value.
- Select Calculate Break Even to view the current payment, new payment, monthly savings, and estimated time to break even.
The output shows principal and interest payments only. Taxes and insurance are not included. Monthly savings show the difference between the current and new payment. Time to break even shows how long it may take for those savings to recover the closing costs you entered.
What to Check Before You Use a Refinance Break Even Calculator
A refinance estimate is most useful when the inputs match the loan offer you are reviewing. Small changes in rate, term, loan balance, or closing costs can change the break even result. This calculator assumes the new loan amount equals the current loan balance and that closing costs are paid out of pocket.
Payment savings are not the only factor
A lower monthly payment can come from a lower interest rate, a longer loan term, or both. A longer term may lower the payment but can also change how long you make payments. This calculator focuses on monthly principal and interest savings, not lifetime interest cost.
The break even point depends on your closing costs
Closing costs are central to the result. Higher costs usually mean a longer break even time. Lower costs usually mean a shorter break even time. The calculator uses the closing cost amount you enter, or $3,000 if that field is blank.
| Calculator item | How it affects the result |
|---|---|
| Current Loan Balance | Used as the principal amount for both payment estimates |
| Current Interest Rate | Helps calculate the current monthly principal and interest payment |
| Remaining Term on Current Loan | Sets the number of months left on the current loan |
| New Interest Rate | Helps calculate the new monthly principal and interest payment |
| New Loan Term | Sets the number of months for the new loan |
| Refinance Closing Costs | Divided by monthly savings to estimate the break even time |
Know what this estimate does not include
The calculator does not include taxes, homeowners insurance, mortgage insurance, escrow payments, prepaid interest, lender-specific rules, or changes in loan balance from rolled-in costs. It also does not compare total interest paid over the full life of each loan. Use the result as a planning estimate, not as financial advice.
Frequently Asked Questions
What is a refinance break even calculator?
A refinance break even calculator estimates how long it may take for monthly payment savings to recover refinance closing costs. This calculator compares your current principal and interest payment with a new principal and interest payment, then divides closing costs by the monthly savings when savings are positive.
How do I calculate the break even point on a refinance?
You calculate the refinance break even point by dividing refinance closing costs by monthly savings. In this calculator, monthly savings are the current principal and interest payment minus the new principal and interest payment. If there are no monthly savings, the calculator shows that the loan never breaks even.
What does monthly savings mean in this calculator?
Monthly savings means the difference between the estimated current monthly principal and interest payment and the estimated new monthly principal and interest payment. The calculator does not include property taxes, homeowners insurance, mortgage insurance, escrow items, or other monthly housing costs in this savings figure.
Why does the calculator say Never (No Savings)?
The calculator says Never (No Savings) when the new monthly payment is not lower than the current monthly payment. In that case, there are no positive monthly savings to recover the refinance closing costs. The calculator then sets monthly savings to $0.00 and does not calculate a break even month.
Does this calculator include taxes and insurance?
No, this calculator does not include taxes and insurance. It calculates principal and interest only, often shown as P&I. Your full mortgage payment may also include property taxes, homeowners insurance, mortgage insurance, and escrow items, so your actual monthly payment may be different.
What closing costs should I enter?
You should enter the refinance closing costs you expect to pay out of pocket. The calculator uses this number to estimate how long your monthly savings need to recover those costs. If the closing cost field is blank, the calculator uses its default closing cost value of $3,000.
How accurate is a refinance break even estimate?
A refinance break even estimate is only as accurate as the numbers you enter. This calculator uses a fixed-payment principal and interest formula and assumes the new loan amount equals the current balance. Real results may vary because of fees, lender rules, taxes, insurance, escrow changes, and loan terms.