Mortgage Refinance Break-Even Calculator
Closing costs start the clock and monthly savings run it down. Find the month a refinance actually pays for itself, counting the balance you still owe when you sell, then check it against how long you will stay. Discount points, cash-out, and no-closing-cost quotes included. Free, no signup.
Last reviewed: September 2026 · Uses the 2026 standard deduction ($32,200 MFJ) for the itemizer toggle
A 1.5-point drop on a 2024 loan. Pays back in under a year; an 8-year stay nets five figures.
The 2026 standard deduction for married filing jointly is $32,200. Most filers take it, so mortgage interest gives no tax break and the sticker rate is the real rate.
You stay 8 yrs, past the month-11 break-even, and come out $43,219 ahead.
Three break-evens
Cumulative net if you sold that month
How the Mortgage Refinance Break-Even Calculator Works
You describe two loans. The first is the one you have: balance, rate, original term, and months already paid. The second is the quote on the table: new rate, new term, and closing costs. The engine then runs both side by side, one month at a time, for as long as either loan lasts. Every month it asks whether you would be ahead if you sold the house that day, adding the payments you saved to the difference between the two balances you would have to pay off at closing, then subtracting what the refinance cost upfront.
The first month that answer turns positive is the break-even on the stopwatch, and your expected stay is the marker on its rim. Past the break-even, the dial fills green and shows your net gain; short of it, the dial turns red and shows the loss. On the High-Rate 2024 preset ($420,000 at 7.25% refinanced to 5.75% for $5,400), the payment drops from $2,924 to $2,451 and the refinance is ahead by month 11. A third figure, the real break-even, discounts each saved dollar at what your closing-cost cash could have earned (5% by default, compounded monthly), so it lands a little later: month 36 instead of 32 on the Marginal preset.
Is It Worth It to Refinance? The Break-Even Test
Search for a should I refinance calculator and most results put a new payment next to the old one. That comparison cannot tell you whether refinancing is worth it, because the answer hinges on a number neither payment contains: how long you will keep the loan. Here, the verdict depends on that number. Leave before the break-even and the tool recommends against refinancing, even when the new payment is lower. Stay past it but by less than half again and it calls the deal marginal. Stay well past it and it says refinance.
The Near-Term Mover preset shows the gate at work. Moving $280,000 from 6.5% to 5.5% saves $211 a month, but with $6,000 in costs you only get ahead at month 26. A move at month 24 turns the deal into a $441 loss, while the no-closing-cost version of the same quote nets $3,458. Any mortgage refinance worth it calculator that ignores your stay would have called that a yes.
How Long to Break Even on a Refinance, and Why the Formula Misleads
The textbook refinance break even months formula divides closing costs by monthly savings. On the High-Rate preset that is $5,400 ÷ $473 = 11.4 months, and the month-by-month answer (11) agrees, because the new loan runs about as long as the old one. Change the term and the formula falls apart, which happens in most refinances.
Take the Marginal 0.5% preset: 27 years left on a $310,000 loan at 6.25%, refinanced to 5.75% on a 25-year term with $4,200 of costs. The payment barely moves ($1,983 to $1,950), so the formula says 128 months. The shorter term pays principal down much faster, though, and counting that you are ahead at month 32. The opposite happens when you stretch back to 30 years: part of the lower payment is slower paydown you hand back at sale. A refinance break-even point calculator has to follow the balance, not just the payment, or it gets both cases wrong.
Refinance Closing Costs: How Much Is Too Much?
Lenders and consumer guides commonly quote 2% to 5% of the loan as a planning range for refinance closing costs, and many rate-and-term refinances land near the low end. The presets run from about 1.3% ($5,400 on $420,000) to 2.3% ($7,000 on $300,000). The fee on its own tells you little; what matters is the fee measured against your savings and your stay.
The reverse calculator turns that into a ceiling. Pick the number of years you are sure to stay and it returns the most you can pay and still break even by then, using the same balance-adjusted math as the dial. For the High-Rate quote with a 5-year horizon, the ceiling is about $30,930. Use it as a refinance closing costs calculator when the fee sheet arrives, and as a mortgage refinance savings calculator when you want to see what a negotiated fee cut does to your net: the what-if slider moves closing costs in $250 steps.
Is Refinancing for 0.5 Percent Worth It? Testing the Rule of Thumb
A popular rule of thumb (NerdWallet's version) says to refinance when rates fall 0.5 to 0.75 percentage points. The rate-drop strip checks it against your numbers. It reruns the full calculation at 0.25, 0.50, 0.75, 1.00, and 1.50 points below your current rate, plus your actual quote, and shows each break-even and the net over your stay, with the rule-of-thumb band underlined.
Loan size and fees swing the result. On the High-Rate preset, a half-point drop (7.25% to 6.75%) breaks even at month 32 and nets $9,571 over 8 years. On the smaller Marginal preset, the same half-point also breaks even at month 32 but nets $4,118 over 5 years, and a quarter-point drop needs 57 months. A bigger balance makes a small drop worth more dollars; a shorter stay makes any drop worth less.
Are Discount Points Worth It? The Second Break-Even
A discount point costs 1% of the loan, per the CFPB, and commonly buys about a quarter-point off the rate, though every lender prices it differently. Points get their own stopwatch here because they are a separate bet inside the refinance: you pay more upfront to lower the payment on the same loan, and that extra has its own payback month.
On the Points Buy-Down preset, 1.5 points on a $400,000 quote cost $6,000 and take the rate from 6.5% to 6.125%, saving $98 a month. Put those numbers through a refinance points break-even calculator and two answers come back: $6,000 ÷ $98 = 61 months by the quick formula, and month 71 once the lost deduction for a 32% itemizer is counted. The owner plans to stay 72 months, so the points barely clear. Move a year early and they cost money. IRS Publication 936 also generally spreads the deduction for refinance points over the life of the loan instead of the year you pay them.
No Closing Cost Refinance: When the Higher Rate Wins
A no-closing-cost refinance swaps upfront fees for a higher rate, typically 0.25 to 0.5 points higher according to PNC's explainer, with the lender paying the costs through a credit. You are ahead from the first month, but every later month costs a bit more than the version where you paid.
A no-closing-cost refinance calculator that stops at the monthly payment misses the point: the two paths cross at some month, and that crossover is the decision. On the High-Rate preset, the no-cost version at 6.125% (the 5.75% quote plus 0.375) beats paying $5,400 upfront for anyone who sells within 42 months. After that, paying upfront pulls ahead, and by year 8 it is $7,176 better. The cumulative chart draws both lines and marks the crossover, your break-even, and the month you plan to move.
Cash-Out Refinance Break-Even and the HELOC Alternative
A cash-out refinance replaces the whole loan, not only the new money. When your current rate is low, the true price of the cash includes giving that rate up on every dollar you already owe. That is why a cash out refinance break even calculator rarely finds a break-even when the new rate is higher: the refi never pays for itself, so the useful question becomes what the cash costs. The decoder answers with one figure, the effective annual rate on the cash, solved as the internal rate of return on the money in hand, the higher payment each month, and the larger balance repaid at sale.
The Cash-Out Renovation preset shows how far apart the numbers can get. Pulling $50,000 from a $300,000 loan at 3.25% into a 6.5% cash-out refi with $7,000 of costs raises the payment $787 a month. Over a 10-year stay the cash effectively costs about 24.2% a year, roughly $134,910 in total, against about $42,500 of interest on an 8.5% interest-only HELOC. The panel works as a refinance vs HELOC calculator with both costs side by side. Keep in mind that HELOC rates usually float and that Fannie Mae caps conventional cash-out refis on a primary home at 80% loan-to-value.
Refinancing to Lower Your Payment Without Adding Total Interest
Refinance into a fresh 30-year loan eight years into your current one and you have signed up for 38 years of mortgage payments. The payment falls, but some of the drop is simply the extra time. On the Keep-Payoff-Date preset ($250,000 at 6.75% with 22 years left), a fresh 30-year loan at 5.5% lowers the payment by $401 and clears the quick formula in 11 months. It also adds $30,461 of total interest, and with the slower paydown counted you are really ahead only at month 18.
Keep the original payoff date instead, with a 22-year term at the same 5.5%, and the payment still drops $186 a month while total interest falls by $49,009. After 12 years you are $30,138 ahead instead of $17,376, and the naive payment-times-months math would have credited the fresh loan with $53,214. Read any refinance to lower payment calculator result next to its total-interest line; the keep-my-payoff-date toggle here shows both at once.
Frequently Asked Questions
What is the refinance break-even months formula, and when is it wrong?
The formula is closing costs divided by monthly payment savings. Drop a $420,000 loan from 7.25% to 5.75% for $5,400 and the payment falls $473, so $5,400 ÷ $473 = 11.4 months. That shortcut only holds when the new loan runs about as long as the old one. Refinance a $310,000 loan with 27 years left into a 25-year term at 5.75% and the formula says 128 months, yet you are ahead at month 32, because the shorter loan pays principal down faster. The calculator tracks both balances month by month and shows the formula result next to the true one.
How long does it take to break even on a refinance?
Across the six presets above, the true break-even runs from 11 months (a 1.5-point drop on $420,000 with $5,400 of costs) to 45 months (a quote carrying $11,000 of costs, $6,000 of it discount points). A half-point drop on a $310,000 loan lands at month 32. A refinance that raises your payment, like most cash-out refis on a low-rate loan, never breaks even at all. The number only means something next to your stay, which is why the verdict compares the two.
Is it worth it to refinance if I might move in two years?
Usually not with closing costs. The Near-Term Mover preset refinances $280,000 from 6.5% to 5.5%, saving $211 a month, but $6,000 of costs means the refi is ahead only at month 26. Selling at month 24 leaves you $441 behind. The same quote as a no-closing-cost loan at 5.875% nets $3,458 over those two years because there is nothing to recover. Short stays favor no-cost quotes or keeping the loan you have.
Is refinancing for 0.5 percent worth it?
It can be, and the rule of thumb (refinance when rates fall 0.5 to 0.75 points) is a starting point, not an answer. On a $420,000 loan with $5,400 of costs, a 0.5-point drop from 7.25% to 6.75% breaks even at month 32 and nets $9,571 over 8 years. On a $310,000 loan with $4,200 of costs, the same half-point breaks even at month 32 and nets $4,118 over 5 years, while a quarter-point drop needs 57 months. The rate-drop strip runs these for your own numbers.
How much should refinance closing costs be?
Guides commonly quote 2% to 5% of the loan amount as a planning range, and many rate-and-term refinances come in near the low end; the High-Rate preset uses $5,400 on $420,000, about 1.3%. The better test is the ceiling your stay can absorb. With $473 a month in savings and a 5-year horizon, the reverse calculator puts the maximum at about $30,930, because above that the refi cannot pay for itself before you leave.
Are discount points worth it when I refinance?
One point costs 1% of the loan and commonly lowers the rate by around 0.25 points, though lenders price it differently. On a $400,000 quote, 1.5 points cost $6,000 and take the rate from 6.5% to 6.125%, saving $98 a month. The quick formula says 61 months to recover; for a homeowner who itemizes in the 32% bracket the after-tax payback is month 71, against a planned 72-month stay. Move a year early and the points lose money. The IRS generally spreads the deduction for refinance points over the life of the loan.
When does a no-closing-cost refinance beat paying the costs?
When you leave before the two paths cross. Lenders typically add 0.25 to 0.5 points to the rate in exchange for covering closing costs. On the High-Rate preset, a no-cost version at 6.125% beats paying $5,400 upfront for anyone who sells within 42 months (3 years 6 months). After that, paying upfront pulls ahead, and by year 8 it is $7,176 better. The chart marks the crossover month for your quote.
Is a HELOC cheaper than a cash-out refinance?
Often, when your current mortgage rate is well below today’s rates, because a cash-out refinance re-prices your whole balance, not just the new money. Pulling $50,000 from a $300,000 loan at 3.25% into a 6.5% cash-out refi with $7,000 of costs raises the payment $787 a month; over a 10-year stay the cash effectively costs about 24.2% a year, roughly $134,910 in total, versus about $42,500 of interest on an 8.5% interest-only HELOC. A cash-out can win when your existing rate is at or above the new one. HELOC rates usually float, and conventional cash-out refis on a primary home cap at 80% loan-to-value.
Will refinancing increase my total interest even if my payment goes down?
Yes, if you restart a long term partway through your loan. Eight years into a 30-year mortgage with $250,000 left at 6.75%, a fresh 30-year refi at 5.5% cuts the payment by $401 but adds $30,461 of total interest. Keeping the original payoff date (a 22-year term at the same rate) still cuts the payment $186, lowers total interest by $49,009, and leaves you $30,138 ahead after 12 years versus $17,376 on the fresh 30-year loan.
Does the mortgage interest deduction change my refinance break-even?
Only if you itemize, and few filers do: about 9.5% itemized in 2023, down from 30.6% in 2017, after the 2017 tax law nearly doubled the standard deduction. For 2026 the standard deduction is $32,200 married filing jointly and $16,100 single. If you do itemize, every dollar of interest you stop paying also shrinks your deduction, so at a 32% bracket only 68 cents of it is a real saving; on the Points preset that pushes the points payback from month 48 to month 71. Interest on cash-out money is deductible only when it goes into the home.