What is a Mortgage Refinance?
Refinancing replaces your existing mortgage with a new one, ideally at a lower rate. You pay closing costs to do it, so the core question isn't just 'is the new rate lower' but 'do the monthly savings earn back those costs before I move or refinance again.'
That's the break-even point, and it's the number that decides whether a refinance is smart. Alongside it sits a subtler trade-off: a new loan resets the clock, so a lower payment can still mean more total interest if the term stretches out.
Why it matters
Lenders advertise the lower payment because it's the most visible benefit — but it can hide two costs. First, the closing costs: if you sell in three years but break even in four, the refinance lost you money. Second, the reset term: dropping from a 24-years-left loan into a fresh 30 can add years of interest even at a lower rate.
Seeing the break-even in months and the lifetime-interest difference side by side turns 'the payment is lower, so it's good' into an actual financial decision you can defend.
What to do next
Enter your real current balance, rate, and months remaining, then the new rate, term, and quoted closing costs. Check the break-even against how long you realistically expect to keep the home, and look at whether lifetime interest goes up or down.
If the break-even is short and lifetime interest falls, it's a strong refinance. If you're chasing a lower payment by extending the term, consider a shorter new term (like 15 or 20 years) to keep the interest savings. Then shop at least three lenders — closing costs and rates vary more than borrowers expect.
Frequently asked questions
What is the break-even point on a refinance?
It's how long it takes for your monthly savings to add up to the closing costs you paid. If refinancing costs $6,000 and saves $250 a month, you break even in 24 months. Stay past that and the refinance is net positive; leave before and you lost money on the costs.
When is refinancing worth it?
Generally when the new rate is meaningfully lower (a common rule of thumb is 0.5–1%+), your break-even is well within how long you'll keep the home, and you're not resetting to a much longer term that raises lifetime interest. This calculator shows all three so you can judge for your situation.
Does a lower payment always mean I'm saving money?
Not necessarily. Refinancing into a fresh 30-year term can lower the payment but stretch interest over more years, so you can pay more overall even at a lower rate. Check the 'lifetime interest' figures here, not just the monthly payment.
Should I roll the closing costs into the loan?
You can, which avoids paying cash upfront, but you then finance those costs and pay interest on them for the life of the loan. Paying cash gives a cleaner break-even; rolling them in preserves cash now at a higher long-term cost. Toggle the option to compare.
What are typical refinance closing costs?
Usually 2–5% of the loan balance — lender origination fees, appraisal, title insurance, and recording fees. On a $320,000 balance that's roughly $6,000–$16,000. Some lenders offer 'no-closing-cost' refinances, but those bundle the cost into a higher rate.
How is my current payment calculated here?
From your current balance, rate, and the months remaining — the payment needed to retire the loan on its existing schedule. Enter your real remaining term for an accurate comparison; using the original 30-year term when you're 5 years in would understate your current payment.
Uses the standard amortization formula; break-even = closing costs ÷ monthly savings (2026).