Lenders pitch refinances on monthly savings. The real question is break-even — when interest savings finally beat closing costs. Find out in seconds.
A clean refinance calculator with the inputs that actually matter: closing costs, term reset, cash-out, and how long you plan to stay.
The numbers your lender shows you, structured the way you should compare them.
Direct answers to the most common questions, in plain language. Skim if you're in a hurry; dig deeper below.
When the rate drop saves more than closing costs before you sell.
A refinance pays off when your interest savings exceed closing costs (typically 2–5% of loan amount) within the time you plan to stay in the home. A common rule of thumb: 0.75% rate drop, 2-year break-even, 5+ years remaining in the home.
At least 0.5%, ideally 0.75–1%, given closing costs.
The old "1% rule" is outdated. With closing costs at 2–5% of the loan, you need the interest savings over your remaining horizon to exceed those costs. For most homeowners, a 0.75% drop hits break-even in 2–3 years; under that, the math gets thin fast.
The month when cumulative savings finally equal closing costs.
Break-even = closing costs ÷ monthly savings. So $5,000 in closing costs and $250/month savings means break-even at month 20. After that, every payment is pure savings — but only if you're still in the home.
Yes — and that's often where refinances quietly cost you.
A refinance is a new loan. Going from a 30-year you're 5 years into to a fresh 30-year means 35 total years of payments. Lower rate is good; resetting the term often eats most of the savings unless you refinance to a shorter tenure.
The mechanics in short answers — no jargon, no upsell.
Every refinance costs 2–5% of the loan in fees: appraisal, title, origination, underwriting, sometimes points. If your loan is $400K, closing costs are $8K–$20K. The savings have to clear that bar first.
That's the cash you keep every month going forward. The bigger the rate drop and the bigger the principal, the bigger this number.
Closing costs ÷ monthly savings = the months until refinance "pays for itself." Faster than your horizon = good move. Slower = don't bother.
A 30-year refi after 5 years means you're effectively paying for 35 years. The fix: refinance to a 25-year (same payoff date) or 15-year (faster, often lower rate too).
Designed so anyone can model their situation in under a minute, with or without a finance background.
See current loan, new loan, and the lifetime savings (or loss) in one place.
The month when interest savings finally cover closing costs — not a vibe, a number.
Reset to 30 years vs. keeping the same payoff date — see how dramatic the difference is.
Add a cash-out amount and see how it affects monthly payment and total cost.
All the small costs that make or break a refi, baked into one clean number.
Set your horizon — if you might move in 3 years, the calculator says whether to bother.
Everything you might ask before, during, or after using this tool.
Closing costs typically run 2–5% of the loan amount. On a $400,000 loan, expect $8,000–$20,000 in fees: lender origination (0.5–1%), appraisal ($400–$600), title insurance ($800–$2,000), underwriting, recording, and any discount points you choose to buy. Many of these are negotiable; always ask for an itemized Loan Estimate.
Three conditions: (1) rate drop large enough that monthly savings × months in the home > closing costs, (2) you plan to stay in the home past the break-even month, (3) your credit and income are at least as strong as when you originally got the loan. Miss any of these and the math probably doesn't work.
If you can afford the higher monthly payment, almost always yes. A 15-year mortgage typically has a 0.5–0.75% lower rate than a 30-year. Combined with the shorter tenure, the lifetime interest drops dramatically — often by 50–70%.
A refinance where you borrow more than you owe on the current loan and pocket the difference. Useful for high-ROI uses (home improvement, paying off 24% credit cards). Bad uses: vacations, depreciating assets, or anything that just trades a low-interest mortgage for spending. Cash-out usually carries a 0.25–0.5% rate premium.
Break-even = closing costs ÷ monthly payment savings. So $8,000 closing on a refi that saves you $200/month = 40 months to break even. After that, every payment is pure cash flow improvement — but only if you're still living in the home or holding the loan.
A small, temporary ding — typically 5–10 points from the hard inquiry, recovering in 3–6 months. The bigger risk is "rate shopping" with multiple lenders months apart, which can compound the hits. Within a 14–45 day window, multiple mortgage inquiries count as one.
Yes, but expect a worse rate. FHA streamline refinances and VA IRRRL programs have looser credit requirements. Conventional refis typically want 620+, with the best rates at 740+. If your score has dropped since the original loan, refinancing rarely makes sense — you'd be locking in a worse rate.
A recast is a fee-light alternative to refinancing. You make a large principal payment (usually $10K+) and the bank re-amortizes the loan over the original term — same rate, lower monthly payment. Fees are $200–$500 vs. thousands for a refi. Recast doesn't lower the rate but is often the better move if you've come into a lump sum.
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Refinance ads pitch monthly savings as the headline. But monthly savings without break-even context is meaningless. A refi that saves you $300/month after $15,000 in closing costs needs 50 months — over four years — just to break even. If you sell in three, you lost money.
The right framing is "how long do I need to stay in this home for the refi to pay off?" Answer that first, then compare to how long you actually expect to live there. If the gap is comfortable (2× the break-even or more), refinance. If it's thin, recast or do nothing.
Lenders love selling 30-year refinances because the monthly payment looks lowest. But if you're 7 years into a 30-year mortgage and refinance to a fresh 30-year, you've added 7 years of payments. The rate drop might save you $250/month, but those 7 extra years cost you $50,000+ in interest you wouldn't have paid.
The fix: refinance to a term equal to your remaining years. So 7 years into a 30-year becomes a 23-year refi (not 30). Many lenders allow custom terms; you just have to ask. If you can stretch, refinance to a 15-year — the rate is lower, and the lifetime cost is dramatically less.
Cash-out refinance is one of the most misused tools in personal finance. It feels free because the new mortgage absorbs the cash, but you're trading a low-interest, tax-favored asset for whatever you spend the money on. Vacations and cars are wealth destroyers; home improvements that boost resale and consolidation of 24% credit cards are usually OK.
The math test: is the interest rate of the cash use higher than your new mortgage rate? Card debt at 24% vs. mortgage at 7% — yes, cash out and consolidate. Vacation at 0% return vs. mortgage at 7% — no, you just converted spending into 30-year debt.
If you've come into a lump sum and want lower payments, recasting often beats refinancing. You make a large principal payment, the bank re-amortizes the loan, and your monthly payment drops at the same rate. Recasts cost $200–$500 vs. $5,000+ for a refi. The catch: you don't get a rate change.
Use recast when rates haven't moved much (within 0.5%) but you want lower payments. Use refinance when rates have dropped meaningfully (0.75%+) or when you want to switch term lengths.
Two short notes worth reading before you trust any number on this page.
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We are not a bank, NBFC, advisor, broker, or distributor of any financial product. The numbers shown here are estimates for educational purposes only, based on the inputs you provide.
Results are not financial, legal, or tax advice. Please consult a qualified professional before any decision about your loan, investments, or personal finances. Actual loan terms and charges depend on your bank and individual circumstances.
