What does refinance break-even mean?

Refinance break-even is the point where the cumulative monthly savings from a new mortgage equal the upfront closing costs. After that point, the refinance has effectively paid for itself and any additional savings are net benefit.

How does this calculator estimate break-even?

The calculator computes the monthly payment on your current mortgage and the proposed refinance using standard amortization formulas. It then compares the difference in payments to your closing costs and estimates how many months of savings are required to recover those costs.

Does the calculator assume I finance closing costs?

You can treat closing costs as either financed or paid upfront. The calculator focuses on the total closing cost amount and compares it to monthly savings. If you finance costs, the new payment already reflects that higher balance, which may reduce your savings.

Can I change the remaining term on my current mortgage?

Yes. Enter the approximate remaining years on your current mortgage. If you are unsure, check your latest mortgage statement or amortization schedule for the remaining term.

Should I only look at break-even months?

Break-even is one important metric, but you should also consider how long you plan to stay in the home, total interest paid over the life of each loan, and your cash flow needs. A refinance that breaks even quickly may still increase long-term interest if you extend the term significantly.

Mortgage Refinance Break-Even Calculator

Compare your current mortgage to a new refinance offer. See monthly savings, closing costs, and how many months it takes for the refinance to pay for itself.

Current mortgage balance Current interest rate (%) Remaining term (years)

New loan amount New interest rate (%) New term (years)

Total closing costs Years you expect to stay in the home Extra monthly principal (optional)

Tip: Try different new rates and terms to see how closing costs and monthly savings affect your break-even point.

Important: This calculator uses standard fixed-rate mortgage formulas and monthly compounding. Actual lender calculations may differ due to daily interest, escrow, fees, or rounding. Use this for planning and comparison, and confirm details with your lender.

Refinance break-even formulas

To estimate refinance break-even, the calculator compares your current mortgage payment to the new payment and measures how long it takes for monthly savings to recover closing costs. It uses standard fixed-rate mortgage formulas.

1. Monthly interest rate

Monthly rate (r) = Annual rate (%) ÷ 100 ÷ 12

This converts your annual percentage rate into a monthly decimal rate used in the payment formula.

2. Fixed-rate mortgage payment

n = Years × 12
Payment = L × r ÷ (1 − (1 + r)^(-n))

Where:
L = loan amount (balance)
r = monthly interest rate
n = total number of monthly payments

This is the standard amortization formula for a level monthly payment on a fixed-rate mortgage.

3. Monthly savings and break-even

Monthly savings = Current payment − New payment
Break-even months = Closing costs ÷ Monthly savings

If monthly savings are positive, dividing closing costs by savings gives the approximate number of months required to recover those costs. The calculator also shows the equivalent years.

The savings timeline then accumulates monthly savings over time, showing how quickly you reach break-even and how much you save if you stay in the home longer than your break-even point.

Understanding mortgage refinance break-even

Refinancing a mortgage can lower your interest rate, change your term, or adjust your monthly payment. But a refinance is not free—closing costs, lender fees, and third-party charges can add up to thousands of dollars. The key question is whether the monthly savings from the new loan are worth those upfront costs.

The break-even point is the moment when your cumulative savings equal the closing costs. Before break-even, you are still “paying back” the cost of the refinance. After break-even, the refinance has effectively paid for itself, and any additional savings are net benefit.

How the calculator models your refinance

First, the calculator estimates your current monthly payment using your remaining balance, current interest rate, and remaining term. It applies the standard fixed-rate mortgage formula, assuming a level payment and monthly compounding.

Next, it calculates the new payment based on the refinance offer: new loan amount, new interest rate, and new term. If you plan to finance closing costs into the new loan, you can include them in the new loan amount. If you plan to pay them upfront, you can keep the new loan amount equal to your remaining balance and enter closing costs separately.

The difference between the current and new payments is your monthly savings. If the new payment is higher, the calculator will show negative savings and indicate that the refinance does not break even.

Break-even and time in the home

Break-even only matters if you plan to stay in the home long enough to reach it. For example, if your refinance breaks even in 60 months (5 years) but you expect to move in 3 years, you may never recover the closing costs. On the other hand, if you plan to stay for 10 or 15 years, the savings beyond break-even can be substantial.

That’s why the calculator includes a “years you expect to stay in the home” input. It uses this to show cumulative savings over your expected stay, helping you see whether the refinance makes sense for your timeline.

Worked example

Imagine you have a remaining balance of $280,000 at 5.25% with 25 years left. Your current payment is roughly:

Balance: $280,000
Rate: 5.25%
Term: 25 years (300 months)

Now you’re offered a refinance at 4.25% for 30 years with $4,500 in closing costs. If you keep the loan amount at $280,000 and pay closing costs upfront, your new payment will be lower than your current payment. Suppose the calculator shows monthly savings of about $220.

Break-even months would be:

Break-even months ≈ 4,500 ÷ 220 ≈ 20.5 months

In this scenario, you’d recover closing costs in under two years. If you plan to stay in the home for 7–10 years, the refinance could produce meaningful long-term savings.

Practical tips

Compare multiple refinance offers with different rates and terms to see how break-even changes.
Be cautious about extending your term significantly; lower payments may come with higher total interest over the life of the loan.
Consider your cash flow needs—sometimes a refinance that slightly increases total interest can still be worthwhile if it meaningfully lowers your monthly payment.
Use the exported savings timeline to discuss options with a lender or financial advisor.

Ultimately, a refinance decision is about more than just the headline rate. Break-even, time in the home, total interest, and your comfort with the new payment all matter. This calculator helps you see those trade-offs clearly.

Frequently Asked Questions

What closing costs should I include?

Include lender fees, appraisal, title, recording, and any other charges associated with the refinance. You can also include points if you are paying to buy down the rate. The goal is to capture the full cost of the transaction.

What if my new payment is higher?

If the new payment is higher than your current payment, monthly savings will be negative and the refinance will not break even. This can happen if you shorten the term or increase the loan amount significantly. In that case, focus on other goals, such as paying off the loan faster.

Does the calculator include taxes and insurance?

No. The calculator focuses on principal and interest payments. Escrow items like property taxes and homeowners insurance are typically similar before and after a refinance and do not affect break-even in the same way.

Can I model financing closing costs?

Yes. If you plan to roll closing costs into the new loan, add them to the new loan amount. This will increase the new payment and reduce monthly savings, which may lengthen your break-even time.

Is this financial advice?

No. This tool is for education and planning. It helps you visualize break-even and savings, but it is not personalized financial advice. Consider speaking with a qualified advisor or lender before making decisions.

Can I export the savings timeline?

Yes. Use the Export CSV button to download the month-by-month savings timeline. You can import it into a spreadsheet or share it with a lender or advisor.