Refinance Break-Even Calculator

Updated April 17, 2026 · Mortgage · Educational use only ·

Mortgage refinance break-even calculator

Calculate mortgage refinance break-even point and net savings over five years. Determine when refinancing becomes financially beneficial.

What this tool does

This calculator estimates when refinancing costs are recovered through monthly savings. Enter current mortgage details, new loan terms, and refinancing expenses to see the break-even timeline and projected 5-year net savings. Results are illustrations based on the inputs provided.

Enter Values

Currency($)

Current Mortgage Rate(%)

New Mortgage Rate(%)

Remaining Loan Balance($)

Refinance Closing Costs($)

Years Remaining on Loan(yrs)

Formula Used

M = \frac{C C}{M P _{current} - M P _{new}} where M P = \frac{\frac{B \times r}{12}}{1 - ( 1 + \frac{r}{12} ) ^{- n \times 12}}

M

Months until break-even point

C C

Total closing costs

M P_{c} u r r e n t

Current monthly payment amount

M P_{n} e w

New monthly payment amount

B

Remaining loan balance

r

Annual interest rate as decimal

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Disclaimer

Results are estimates for educational purposes only. They do not constitute financial advice. Consult a qualified professional before making financial decisions.

When Does Refinancing a Mortgage Pay Off?

Refinancing to a lower rate reduces your monthly payment, but closing costs must be paid upfront. The break-even point is the number of months it takes for accumulated monthly savings to exceed those closing costs.

Calculating Break-Even Time

Divide total closing costs by the monthly savings from the lower rate. The result is your break-even in months. If you plan to stay in the home longer than that period, refinancing may produce a net benefit over the remaining loan term.

Limitations of This Analysis

This calculator uses a simplified payment comparison and does not account for changes to the remaining loan balance, tax deductibility, or opportunity cost of the closing cost cash. Results are estimates for directional comparison only.

What People Often Overlook

One thing many people find surprising is how much the break-even period shifts with relatively small changes in closing costs. Even a difference of a few hundred units can push that timeline out by several months. It can help to shop around for conveyancing and valuation fees rather than accepting the first quote. Also worth considering is how long you genuinely expect to stay in the property. A break-even point of 30 months looks very different if you are planning to move in two years versus ten.

A Useful Starting Point, Not a Final Answer

Think of this calculation as a compass rather than a map. It points you in a helpful direction. Many people use it to quickly filter out refinance options that simply do not make mathematical sense, before speaking with a mortgage adviser for a fuller picture. That kind of sense-check is this tool at its most practical.

Example Scenario

Break-even point for refinancing estimated at 20 mo the result, with ongoing savings potential thereafter.

Inputs

Current Mortgage Rate:6.5%

New Mortgage Rate:5.5%

Remaining Loan Balance:$250,000

Refinance Closing Costs:$3,000

Years Remaining on Loan:25 yrs

Expected Result20 mo

This example uses typical values for illustration. Adjust the inputs above to match a specific situation and see how the result changes.

Sources & Methodology

Methodology

This calculator divides total refinancing costs by the monthly payment savings to determine break-even months. It assumes a fixed interest rate, no additional fees beyond closing costs, consistent monthly payments, and no early payoff. Results are estimates based on provided inputs and do not account for taxes, insurance, or market changes.

References

Frequently Asked Questions

How do I know if refinancing my mortgage is worth it?

A common starting point is comparing monthly savings against the upfront closing costs to find the break-even point in months. If the property will be held beyond that point, refinancing may work in one's favour over time. This calculator can help illustrate that.

What is a good break-even period for a mortgage refinance?

Many consider a break-even period of around 24 months or less to be a reasonable threshold, though this varies depending on individual circumstances and how long one intends to remain in the home. A shorter break-even period generally means the refinance starts paying off sooner. This calculator can help illustrate that.

How much do refinancing closing costs typically add up to?

Closing costs for a refinance can vary quite widely depending on the lender, the loan size, and local fees such as valuation and legal costs, but they often fall somewhere between 2% and 5% of the remaining loan balance. It is worth gathering actual quotes before running any estimates. This calculator can help illustrate that.

Does refinancing restart my mortgage term?

In many cases, refinancing does reset the loan term, which can mean paying interest for longer even if the monthly payment drops — and that is something worth considering carefully before proceeding. Looking at total interest paid over the full term, not just the monthly saving, gives a more complete picture. This calculator can help illustrate that.

How much lower does my interest rate need to be to make refinancing worthwhile?

There is no universal figure, as the answer depends on remaining balance, how long one plans to stay, and what the closing costs come to in one's specific situation. Many people find that even a modest rate reduction can be meaningful on a large balance with a long horizon remaining. This calculator can help illustrate that.

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