A refinance break-even point estimates how long the savings from a new mortgage take to recover the cost of getting it. A simple version divides eligible refinance costs by expected monthly payment savings. If costs are $4,800 and true monthly savings are $160, the simple result is 30 months.
That shortcut is useful but incomplete. The old and new payments may contain different principal amounts, escrow deposits, mortgage insurance, or term lengths. A payment reduction created by stretching the debt over more years is not the same as an interest saving. Financed fees also increase the new balance and accrue interest.
A better review compares interest, fees, principal remaining, and cash paid over the period the owner expects to keep the loan. It also tests what happens if the property is sold or refinanced before the estimated break-even month. The answer is a planning estimate, not a promise of savings.
For a rental, include the operating effect. A smaller required payment may improve monthly cash coverage, while a larger balance or longer term can reduce future flexibility. Keep the assumptions with the decision so a later owner or accountant can reproduce the calculation.
Simple formula and its boundary
Simple break-even months = refinance costs divided by monthly payment reduction. Use it as a first screen only when the compared payments have similar escrow treatment and the term change is understood.
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Include lender and third-party costs caused by the refinance.
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Do not count prepaid taxes or escrow funding as a permanent cost without tracing later refunds or balances.
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Run a total-cost comparison when the term, principal, or mortgage insurance changes materially.
Worked rental example
Suppose the transaction costs $6,000 and reduces the required payment by $225. The simple break-even is about 27 months. If the owner expects to sell in 18 months, the payment comparison alone does not support the refinance; if the owner expects to hold for seven years, the longer-horizon interest and remaining-balance comparison becomes more important.
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Written and maintained by the Aptoria editorial team
Repository and source review completed July 28, 2026. Aptoria reviews scope, source fit, examples, limitations, links, and publication gates. This record does not claim attorney, CPA, lender, appraiser, or other independent professional sign-off.
Professional review is not claimed. Verify current law, tax treatment, loan terms, valuation inputs, and property-specific facts with the appropriate qualified professional before acting.
Primary and authoritative sources
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Related terms
Financing
Mortgage refinance
Replacing an existing mortgage with a new loan, usually to lower the rate, change the term, or pull out built-up equity as cash.
Financing
Rate-and-term refinance
A rate-and-term refinance replaces an existing mortgage mainly to change the interest rate, loan term, or both rather than to extract material equity as cash.
Financing
Cash-out refinance
A cash-out refinance replaces a mortgage with a new loan whose proceeds pay transaction obligations and release additional property equity to the borrower or other permitted uses.
Investing metrics
Amortization
The schedule by which a loan is paid off over time, with each payment split between interest and principal.
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