Every month you stay at 7.5% instead of refinancing to 6.5% costs you $202.
Not in theory. In your actual monthly payment β money that keeps leaving your account and didn't have to.
The reason most borrowers don't act isn't confusion about rates. It's one number they never run: the break-even month. Until you know that number, you can't tell whether refinancing puts money in your pocket or just resets the clock.
Here's how to calculate it β in under two minutes.
Key Takeaways
Refinancing saves you money only if you stay past the break-even month β dropping from 7.5% to 6.5% on a $300,000 loan breaks even at month 30 and saves $202 every month after that.
- The lower payment isn't your savings β rolling $6,000 in closing costs into a new 30-year loan at 6.5% turns a $6,000 expense into $13,700 in total interest paid over the life of the loan.
- The 1% Rule β a rate drop of at least 1 percentage point typically produces a break-even under 36 months; a 0.5% drop pushes break-even to nearly 5 years at typical closing costs.
- If you bought in 2020β2022 and are refinancing in 2026, ask your lender for a 20-year term, not a new 30-year: the payment stays nearly identical (~$2,116 vs. $2,098) but saves $138,000 in total interest.
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The Break-Even Calculation: The Only Number That Matters
Every refinance comes down to one question. How long until your monthly savings pay back what the refinance cost?
Break-even month
The number of months it takes for your monthly savings to add up to your total closing costs. For example, if your refinance saves you $202 a month and closing costs were $6,000, your break-even is 30 months. Before month 30, you've spent more than you've saved. After month 30, you're in the black.
The formula:
Break-Even Month = Total Closing Costs Γ· Monthly Payment Savings
Example: Closing costs: $6,000 Old monthly payment: $2,098 (7.5% on $300,000, 30-year) New monthly payment: $1,896 (6.5% on $300,000, 30-year) Monthly savings: $202
Break-even = $6,000 Γ· $202 = 30 months (2 years, 6 months)
If you stay longer than 30 months β refinancing saves you money. If you sell or move before month 30 β the refinance cost you money.
That's the entire decision framework. The rate drop is exciting. The break-even is what decides whether it's smart.
Β» MORE: Use the Refinance Calculator to find your exact break-even month
What Closing Costs Actually Include
Most people know closing costs exist. Few know what's inside them β and that gap often causes sticker shock at the closing table.
Closing costs
Fees paid to complete a mortgage refinance, typically ranging from 2%β6% of the loan balance. On a $300,000 loan, that's $6,000β$18,000. They are paid upfront or rolled into the new loan balance.
Here's what you're actually paying for:
| Cost Type | Typical Range | Notes |
|---|---|---|
| Loan origination fee | 0.5%β1% of loan | Lender's fee for processing the loan |
| Appraisal | $400β$800 | Required to confirm current home value |
| Title insurance & search | $800β$1,500 | Protects against title disputes |
| Recording fees | $50β$250 | Government fee to record the new deed |
| Prepaid interest & escrow | Varies | Covers days between closing and first payment |
The origination fee is the biggest variable. This is where lenders have the most room to move. It's the first number to negotiate. Ask for a Loan Estimate from at least two lenders before committing. The form is standardized by the CFPB, so costs are directly comparable side by side.
β² Check before you proceed
Some loans from the past 2β3 years include a prepayment penalty for paying off early. A penalty of $2,000β$5,000 adds months to your break-even and must be included in the calculation. Check your original loan documents before contacting any lender.
Know what's inside your closing costs before you talk to a lender β that knowledge is the difference between a fee you can negotiate and one that surprises you at the table.
The 1% Rule: Your Mental Shortcut
You don't need to run the full break-even calculation every time a rate drop catches your eye. The 1% Rule gives you a quick filter.
The 1% Rule: A rate drop of at least 1 percentage point typically justifies a refinance if you plan to stay in your home for at least 2β3 years.
Rate drop examples on a $300,000 mortgage: 7.5% β 6.5% (1.0% drop) β $201/month savings Β· break-even β 30 months 7.5% β 6.0% (1.5% drop) β $299/month savings Β· break-even β 20 months 7.5% β 5.5% (2.0% drop) β $394/month savings Β· break-even β 15 months
Assumes $6,000 in closing costs. Smaller drops take longer to recover. Break-even shortens as the rate difference grows.
β Keep in mind
A 0.5% rate drop saves roughly $95β$105/month on a $300,000 loan β producing a break-even of nearly 5 years at typical closing costs. The 1% Rule exists precisely because half-point drops rarely produce a compelling case on their own.
A 0.5% rate drop often fails the 1% Rule. The monthly savings are too small to cover typical closing costs in a reasonable amount of time. A 0.25% drop almost never makes sense unless your closing costs are very low.
Use the 1% Rule as a quick pass/fail before running the full calculation. If the drop is under 1%, stop there. If it's 1% or more, run the break-even math.
When the Rate Drop Looks Right but the Math Doesn't
A lower rate isn't always the right move. Two cases where the math works against you β even when the rate looks good.
You're resetting to a new 30-year term
Here's the scenario: you bought five years ago with a 30-year mortgage. You have 25 years left. A lender offers you a refinance into a new 30-year loan at a lower rate.
Your monthly payment drops. But you've just extended your total repayment timeline by five years. The lower rate saves you each month. But five extra years of payments can cost you more in total interest than you save from the rate drop.
Example β extending the term:
Original loan: $300,000 at 7.5%, 30-year β $2,098/month After 5 years: ~$284,000 remaining, 25 years left Total remaining interest at current path: ~$345,000
Refinance into new 30-year at 6.5%: New monthly payment: $1,794 (saves $304/month vs. current $2,098) Total interest over new 30 years: ~$362,000
Result: despite the lower payment, you pay ~$17,000 MORE in total interest than just staying the course on your current loan.
Better option: refinance into a 20-year at 6.5% β payment $2,116 (only $18/month more than your current $2,098) but total interest drops to ~$224,000 β saving ~$138,000 vs. the new 30-year path.
β Important
Always ask your lender for a term that matches your remaining loan years β not a new 30-year by default. Most lenders quote 30-year options because the payment is lower. A 20-year or 22-year refinance at the same rate often carries a lower interest rate and saves tens of thousands in total interest.
Ask the lender for a 20-year refinance that matches your remaining term. Your payment will be close to what you pay now. But total interest drops by over $100,000 compared to a new 30-year loan.
You're planning to move within the break-even period
The break-even month is a hard line. If there's a meaningful chance you sell or move before you hit it, the refinance costs you money. Life can change β a new job in another city, a growing family, aging parents. Think about this before you pay $8,000 in closing costs.
A good rule: if you're not sure you'll stay 36 months, your break-even needs to be 24 months or fewer to be worth it.
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Rolling Closing Costs Into the Loan: The Hidden Tradeoff
Many lenders offer a no-closing-cost option. This means you pay nothing upfront. The costs get rolled into the new loan balance instead.
The tradeoff: you're now paying interest on those closing costs for the life of the loan.
Rolling $6,000 in closing costs into a 30-year loan at 6.5%:
Monthly payment increase on that $6,000: ~$38/month Total interest paid on $6,000 over 30 years β $7,700 additional
True cost of "no-closing-cost" refinance: $13,700 (not $6,000)
Break-even calculation still applies β but use the full $13,700 as your cost, not the $6,000 that appeared on the closing disclosure.
| Pay Upfront | Roll Into Loan | |
|---|---|---|
| Out-of-pocket at closing | $6,000 | $0 |
| Monthly payment increase | None | ~$38/month |
| Interest paid on closing costs | $0 | ~$7,700 |
| True total cost | $6,000 | ~$13,700 |
| Best for | Long-term holders | Cash-tight buyers |
Pay upfront if you plan to stay long-term. Roll in only if cash is tight and your break-even is short enough that the extra interest stays small.
Rolling costs in makes sense if you're short on cash at closing. It also works if your break-even is short enough that the extra interest is small. It doesn't make sense if you plan to stay long-term. At today's rates, that extra $7,700 in interest turns a $6,000 cost into a $13,700 one.
The "Wasted Interest" Myth
This is the most common reason people talk themselves out of a refinance that would save them money.
The belief: "I've already paid $25,000 in interest over the past five years. If I refinance now, I throw all that away."
The reality: that interest was the price of borrowing money for five years. It's already paid. You got to live in your home. Refinancing can't undo it β and it doesn't need to. The past cost is gone either way.
Here's an analogy. Say you've paid $2,000 a month in rent for five years. You find an apartment for $1,600 a month. You wouldn't say "I already paid $120,000 in rent β moving would waste it." Past payments are gone.
The question is what you pay going forward.
The only number that matters is your remaining loan balance β not how much interest you've already paid. Your balance is what the new rate is applied to. Past interest has no effect on future savings.
The actual concern to watch β and the one worth your attention β is term extension. Refinancing from year 10 of a 30-year mortgage into a new 30-year loan adds years of payments. It can also cost you more in total interest. That's covered in the section above. But that's a question about your remaining term, not about interest you already paid.
If the break-even works with your balance and how long you plan to stay, the refinance saves you money. Full stop.
Β» MORE: How mortgage payments are calculated β principal, interest, and amortization
4 Steps to Know If Refinancing Is Worth It
1. Get a Loan Estimate from at least two lenders
The Loan Estimate is a standard three-page form. The lender must give it to you within three business days of your application. It lists every closing cost in a format you can compare. Getting two estimates takes less than an hour and can save you thousands. Lenders will negotiate on fees when they know they have competition.
2. Calculate your monthly savings before you discuss term length
The lender will focus on your new monthly payment. You need to focus on the difference between old and new. That difference is your savings. It's the number that drives the break-even calculation. Make sure you compare the same loan type. Use principal and interest only β not escrow-inclusive β for a fair comparison.
3. Run the break-even against your realistic stay timeline
How long do you actually plan to stay? Not the best-case guess β the honest one. If your break-even is 32 months and you're "probably staying 3 years," that's a coin flip. It's not a clear yes. A 20-month break-even at 3+ years of expected stay is a confident yes.
4. Ask specifically about term length options
If you have 22 years left on your loan, ask for a 20-year or 22-year refinance. Most lenders default to 30-year quotes because it shows the lowest payment. A shorter term at the same rate saves tens of thousands in interest. It may also come with a lower rate than the 30-year option.
These four steps give you what you need. You'll know the numbers before you talk to a lender, not after.
What This Means for Your Refinance Decision
Refinancing is not a good deal or a bad deal by default. It's a math problem with a clear answer β if you run it.
The break-even month is that answer. A rate drop that looks exciting can disappoint once you factor in closing costs and loan term. And a modest rate drop with low closing costs and a long expected stay can be one of the best money moves you make this decade.
Run the calculator now. Put in your current rate, your new rate offer, your loan balance, and your closing cost estimate. The break-even month is the number that decides.
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Common Questions
Sources & Methodology
Break-even calculations use total closing costs divided by monthly payment savings (principal and interest only, excluding escrow changes). Monthly payment savings use the standard fixed-rate mortgage formula applied to both the existing and proposed loan. Closing cost ranges reflect CFPB Loan Estimate data and Freddie Mac guidance (2%β6% of loan balance). Rate examples use the 30-year fixed average of 6.53% reported by Freddie Mac PMMS as of May 28, 2026, representing the refinance opportunity for borrowers who locked in at 7.5%+ during 2023β2024. The 1% Rule reflects conventional refinance guidance from the CFPB and Freddie Mac. Term extension analysis uses total interest paid over the full loan life at each rate and term combination.
Sources: Consumer Financial Protection Bureau β Refinancing, Freddie Mac Primary Mortgage Market Survey (PMMS), Freddie Mac β Understanding the Costs of Refinancing, Federal Reserve Bank of St. Louis (FRED) β 30-Year Fixed Rate Mortgage Average.
Disclaimer: Results are for educational and informational purposes only. FiscalCalc is not a licensed financial advisor, mortgage broker, or tax professional. Consult a qualified professional before making major financial decisions.