Refinance Break-Even Calculator
See how many months it takes for a mortgage refinance to pay for itself, and whether your new loan term means more or less total interest over the life of the loan.
Thinking about refinancing? This shows how long it takes for the lower payment to repay your closing costs — and, just as important, whether the new term means more or less total interest over the life of the loan.
Current loan balance
What you still owe on your mortgage today — the amount you'd refinance.
Current interest rate
Years left on current loan
Your current rate and how many years are left on it.
New interest rate
The rate you’d get on the refinance. Use a real quote if you have one.
New loan term
"Keep current term" matches your years remaining to avoid re-stretching the debt; or pick a shorter term (e.g. 15 years) to save interest, or a longer one for a lower payment.
Refinance closing costs
Total cost to refinance — origination, appraisal, title, and fees. Often roughly 2–5% of the loan amount.
Break-Even Point
18 months
to recoup $4,000 in closing costs · save $232/mo
A textbook good refinance
You lower the payment and pay less interest over the life of the loan. You recoup the $4,000 in closing costs in about 18 months, so as long as you keep the home past then, the refinance pays off.
This is an educational estimate, not financial advice. Figures cover principal and interest only — not property taxes, homeowners insurance, or PMI — and assume you refinance your current balance and pay closing costs separately (not rolled into the loan). The break-even is the simple "months to recoup costs from the lower payment" and ignores the time value of money. Rates, terms, and fees vary by lender and credit; use real quotes and confirm the numbers with your lender before deciding.
💡About this calculator▼
Refinancing trades an upfront cost — closing costs — for a lower monthly payment. The key question is how long it takes the savings to repay those costs: your break-even point. Refinance and then sell or move before you reach it, and you've lost money; stay past it, and the lower payment is pure savings. This calculator finds that crossover for your numbers.
Enter your current balance, rate, and years remaining, then the new rate, the term you'd choose, and the closing costs. You'll get the break-even in months, your new payment and monthly savings, and — just as important — how the new term changes the total interest you'll pay.
That second part is where this calculator goes further than a simple break-even. Comparing only monthly payments can flatter a refinance, because refinancing usually resets the loan term. Drop your payment by stretching a loan with 22 years left back out to 30, and you can pay tens of thousands more in interest even at a lower rate. By showing both the monthly break-even and the lifetime-interest effect, this tool tells you whether a refinance actually saves money or just rearranges it. It's an educational estimate, not financial advice.
The calculator works out your current payment, your new payment, and the interest each loan costs over its life — then reports the break-even and the difference.
First it computes the current monthly payment (principal and interest) from your balance, current rate, and years remaining, and the new payment from the same balance at the new rate over the new term. The gap between them is your monthly savings.
The break-even is simply the closing costs divided by that monthly savings: how many months of lower payments it takes to recoup what the refinance cost you. A break-even of 30 months means the refinance pays for itself in two and a half years; if you'll keep the home and loan longer than that, you come out ahead.
Then it compares total interest: the interest remaining on your current loan if you keep it, versus the interest on the new loan over its full term. This is the honest check. If you keep a similar term at a lower rate, the new loan costs less interest — a clean win. But if you reset to a longer term, the new loan can cost more total interest despite the lower rate, because you're paying for more years. The tool flags which situation you're in.
One special case it handles: refinancing to a shorter term (say 25 years left down to a new 15) usually *raises* your payment, so there's no monthly break-even — but it can save a fortune in interest and pay the home off years sooner. The calculator recognizes that and explains it rather than calling it a bad deal. The exact formula and a worked example are below.
📐How it's calculated▼
The core is the break-even, with a lifetime-interest comparison alongside it.
Step 1 — Payments (standard mortgage amortization, principal & interest): Current payment = payment on your balance at your current rate over the years remaining New payment = payment on your balance at the new rate over the new term
Step 2 — Break-even: Monthly savings = Current payment − New payment Break-even (months) = Closing costs ÷ Monthly savings
Step 3 — Lifetime interest: Current interest = (Current payment × months remaining) − Balance New interest = (New payment × new months) − Balance Difference = New interest − Current interest (a positive number means the refinance costs more interest over time)
Example: A $250,000 balance at 7% with 25 years left, refinanced to 5.5% on a new 25-year term, $4,000 closing costs
→ Current payment: about $1,767/mo
→ New payment: about $1,535/mo → monthly savings of $232
→ Break-even: $4,000 ÷ $232 ≈ 18 months
→ Interest: about $280,100 on the current loan vs $210,500 on the new one → roughly $69,600 less
Because the term stayed the same (25 years), this refinance lowers the payment and the total interest — a clean win that pays for itself in about a year and a half.
📎Source: Consumer Financial Protection Bureau (CFPB) — Mortgage Refinancing
🔍Finding your inputs▼
Current loan balance: What you still owe today, not your original loan amount or your home's value. It's on your latest mortgage statement, and it's the amount you'd refinance.
Current interest rate: The rate on your existing mortgage (also on your statement). This sets your current payment and the interest you'd pay if you keep the loan.
Years left on current loan: How many years remain, not the original term. If you took a 30-year loan six years ago, enter 24. This matters a lot: it's the term your refinance is compared against, and it's the key to spotting whether a new loan re-stretches your debt.
New interest rate: The rate you expect on the refinance. If you have a quote, use it; otherwise use a realistic current market rate. As a rule of thumb, the savings only tend to justify a refinance when the new rate is meaningfully below your current one.
New loan term: The length of the new mortgage. This is a real choice when you refinance, and it drives the result. Use "Keep current term" to match your years remaining — that captures a lower rate without stretching the loan back out (the cleanest refinance). Pick a shorter term (like 15 years) to pay far less interest and own the home sooner, accepting a higher payment; pick a longer term to minimize the monthly payment, knowing it usually costs more interest overall.
Refinance closing costs: The total upfront cost to refinance — lender origination fees, appraisal, title, recording, and so on. These commonly run about 2–5% of the loan amount (so roughly $4,000–$10,000 on a $200,000 loan), but get an itemized Loan Estimate from your lender for the real figure, since closing costs are the entire reason a break-even exists.
⚠️Special situations▼
I'm planning to move in a few years
Then the break-even is the whole ballgame. If you'll sell before you reach it, the refinance costs you money — you pay the closing costs but don't keep the loan long enough for the lower payment to repay them. Compare the break-even months here to your honest timeline: if you might move in three years and the break-even is 40 months, it's a close call or a no. A lower-cost ('no-closing-cost') refinance, which trades higher rate for lower upfront cost, sometimes makes more sense for a short stay.
My payment goes up when I shorten the term — is that bad?
Not at all — it's often the best move. Refinancing from, say, 25 years remaining into a new 15-year loan raises the monthly payment, so there's no 'monthly break-even,' but you typically save tens of thousands in interest and own the home a decade sooner. The calculator shows this as the shorter-term case and explains the trade-off. The question isn't break-even; it's whether you can comfortably afford the higher payment. If you can, the interest savings are usually well worth it.
Should I roll the closing costs into the loan?
Many lenders let you add closing costs to the balance instead of paying them upfront — convenient, but it changes the math this calculator assumes (it treats costs as paid separately). Rolling them in means you borrow more, pay interest on the fees for years, and your real payment and break-even shift. A 'no-closing-cost' refinance does the same thing via a higher rate. Both can be reasonable, but they're more expensive over time than paying costs out of pocket; ask your lender to show the break-even both ways.
The rate barely dropped — is it worth refinancing?
Run your real numbers, because the old 'you need a 1% drop' rule is too crude. What matters is your break-even and your timeline: a small rate drop on a large balance can still save a meaningful amount and break even quickly, while the same drop on a small balance may never justify the costs. Enter the actual rate and your closing costs above. If the break-even comes out longer than you plan to keep the loan, or the lifetime interest barely moves, a marginal rate cut probably isn't worth the hassle.
I want to take cash out when I refinance
This calculator models a rate-and-term refinance — replacing your loan to change the rate or term, not to borrow more. A cash-out refinance increases your balance (you take equity as cash), which raises both the payment and total interest and changes the break-even entirely, and cash-out loans often carry slightly higher rates. To approximate it here you could raise the balance to your new (post-cash-out) amount, but treat that as rough; a cash-out decision is really about the cost of that borrowed money, which is a different question than break-even.
❓Common questions▼
How do you calculate the break-even point on a refinance?
Divide your total closing costs by the monthly savings from the lower payment. If refinancing costs $4,000 and drops your payment by $232 a month, the break-even is about 18 months — that's how long until the savings repay the cost. After that point, the lower payment is money in your pocket; before it, you'd lose money if you sold or refinanced again. Enter your numbers above and the calculator does this, plus checks how the new term affects your total interest.
Is refinancing worth it if the break-even is, say, two years?
It depends mostly on how long you'll keep the loan. If you'll stay in the home well beyond the break-even — comfortably longer than two years in that example — refinancing typically pays off, since every month past break-even is savings. If you might move or refinance again before then, you risk not recouping the closing costs. Also check the lifetime-interest figure: a refinance that breaks even quickly but re-extends your term can still cost more interest over the long run.
Does refinancing to a lower rate always save money?
Not necessarily — it depends on the term. A lower rate reduces your payment, but if you reset the clock (for example, refinancing a loan with 22 years left into a new 30-year), you can end up paying more total interest despite the lower rate, simply because you're borrowing for more years. To truly save, either keep the new term close to your years remaining, or make sure the interest savings outweigh both the closing costs and any term extension. This calculator shows the lifetime-interest difference so you can see which case you're in.
What are typical mortgage refinance closing costs?
Refinance closing costs commonly run about 2% to 5% of the loan amount — roughly $4,000 to $10,000 on a $200,000 mortgage — covering lender origination fees, an appraisal, title work, and recording fees. They vary by lender and location, so get an itemized Loan Estimate to compare. Because closing costs are the entire reason a break-even exists, getting this number right (and shopping it among lenders) directly determines whether and how fast a refinance pays off.
Should I refinance to a shorter loan term?
If you can afford the higher payment, shortening the term is often the most cost-effective refinance. Moving from a 30-year to a 15-year loan, or from 25 years remaining to a new 15, raises your monthly payment but can save tens of thousands in interest and let you own the home years sooner. There's no monthly 'break-even' because the payment goes up, so the decision is about cash flow, not recouping costs: can you comfortably handle the higher payment? If so, the long-term savings are usually substantial.