Refinancing
When a refinance actually breaks even
Divide the real cost of the new loan by the monthly savings and you get a number of months. Whether that number is good depends on how long you will keep the house — and on a trap most break-even math hides.
6 min read · Updated October 2026
Break-even is the month when the money you spent to refinance has been paid back by the smaller payment. Before that month, the refinance has cost you money. After it, it is saving you money every month it stays in place.
The calculation is simple arithmetic. Getting the inputs right is where most people go wrong.
The short answer
- Break-even months = true closing costs ÷ monthly payment reduction.
- Prepaids, escrow deposits, and taxes are not costs of the refinance.
- A lower payment on a restarted 30-year term can still mean more total interest.
The formula and a worked example
Say the balance is $330,000 on a 30-year fixed loan at 7.25%. The principal and interest payment is roughly $2,251. A refinance at 6.50% on the same balance brings that to about $2,086 — a savings of roughly $165 a month. If the true cost of the refinance is $5,200, break-even is 5,200 ÷ 165, or about 32 months.
True closing costs $5,200 ÷ $165 monthly savings = 31.5 months
- Under 24 months: usually worth doing if the rate is genuinely better.
- 24–48 months: worth doing if you are confident you stay that long.
- Over 60 months: think hard. A lot has to go right for that bet to pay.
Which costs count
Only the costs that are gone — not converted into equity — belong in the numerator. Lender fees, origination, title and closing, appraisal, recording, and discount points all count. Property tax and insurance prepaids do not: you would have paid those anyway, and if the loan pays them from escrow at closing, the money comes back to you at the next escrow analysis.
Rolling costs into the loan balance does not make them disappear. It converts a one-time cost into interest paid over decades, which usually makes the real break-even longer than the quoted one.
The trap: restarting the clock
A refinance replaces a loan with 27 years left with a new 30-year loan. The payment drops partly because the rate is lower and partly because the remaining balance is now spread over 360 months instead of 324. That second part is not a saving; it is more interest paid for more years.
The honest comparison is total cost, not monthly cost: remaining interest on the current loan versus total interest on the new one, assuming you keep the property that long. Sometimes the lower payment still wins comfortably. Sometimes it does not, and the only way to see that is to look at both numbers side by side.
When break-even is the wrong question
Some refinances are not really about the payment:
- Removing mortgage insurance. If the home has appreciated, the refinance can drop PMI or FHA mortgage insurance permanently — that is a saving with no rate improvement needed.
- Cash-out. The purpose is access to equity, so the comparison is the cost of that money against alternatives, not the payment change.
- FHA streamline and VA IRRRL. Both are low-documentation products with their own recoupment rules and, in FHA's case, a net tangible benefit test. A 210-day payment history is often the main requirement.
- Dropping a co-borrower or changing the term. Divorce buyouts and 30-to-15 conversions have their own math; the payment usually rises on a 15-year and the savings are in total interest.
Sanity-check it before anyone runs your credit
Use the refinance calculator on this site with your actual balance, current payment, current rate, and an honest estimate of closing costs. It returns the monthly change and the break-even month, using the same arithmetic shown above. If the break-even comes out past the point where you realistically expect to sell or refinance again, the answer is usually to wait.
Break-even is an estimate, not advice. Actual costs and terms depend on the specific loan, and no quote exists until a scenario is reviewed.