Somewhere around 14 million American homeowners took out mortgages between 2022 and 2025 at rates of 7 percent or higher. If you are one of them, you have watched every rate headline since, doing the same mental math: should I refinance? The honest answer is not in the headlines. It lives in three numbers — your closing costs, your monthly savings, and how long you will actually stay in the home.

Here is how the calculator weighs the trade. Every refinance charges you thousands up front — appraisal, title search, origination, recording fees — to buy a cheaper rate for the years ahead. The calculator amortizes your Current Loan Balance at your Current Interest Rate over your Remaining Term to find what you pay if you do nothing. Then it amortizes the same balance plus Closing Costs at the New Interest Rate over the New Loan Term. Monthly Savings is the payment difference. The Break-Even Period is closing costs divided by monthly savings — the month your cumulative savings finally repay what the refinance cost. Lifetime Savings is everything after that, net of costs. Five inputs, one verdict.

A worked example: the $320,000 decision

Say you owe $320,000 at 7.5 percent with 25 years left. Your payment is about $2,365 a month, and over the remaining 300 payments you will hand over roughly $709,400 — about $389,400 of it interest. Now a lender offers 6.5 percent on a new 30-year loan, with $5,500 in closing costs. The new payment is about $2,023 — saving $342 a month. Break-even: $5,500 divided by $342, or about 16 months. Stay past month 16 and every month after is profit. Sounds like an easy yes — until you check the trap hiding underneath.

The term-reset trap: when a lower rate costs you more

Here is what the monthly payment hides. That new 30-year loan restarts the amortization clock: over 360 payments at $2,023 you will pay about $728,200 in total, or roughly $408,200 in interest — nearly $19,000 MORE lifetime interest than the $389,400 remaining on your current loan, despite the lower rate. The rate improved; the term betrayed you. Now run the smarter version: refinance to 6.5 percent but keep a 25-year term. The payment is about $2,161 — still $204 less than today — break-even stretches to 27 months ($5,500 divided by $204), but lifetime interest falls to roughly $328,200. Net lifetime savings: about $61,300 in interest minus $5,500 in costs, or roughly $55,800 kept. Same rate, same closing costs, wildly different outcome — which is why this calculator shows lifetime savings, not just the monthly win. Always ask the lender to quote your remaining term, not just a fresh 30 years.

The 1% rule is dead — here is the real rule

You have heard that you need a full percentage point of rate drop to refinance. That rule is outdated. A 0.5 percent drop on a $500,000 loan saves about $160 a month and can break even in under two years; a 1.5 percent drop on an $80,000 loan might never repay $4,000 in costs. The modern rule of thumb: refinance when your break-even lands at 24 months or sooner and you are confident you will stay well past it. As a rough ladder, a 0.5-point drop is worth running the numbers on larger loans, 0.75 points is compelling for most borrowers, and a full point is close to a no-brainer if you are staying put. Most refinances break even somewhere between months 18 and 36 — if yours lands past month 36, either the rate drop is too small or the costs are too high for your situation.

Where the closing costs actually go

Expect 2 to 5 percent of the loan amount — $6,000 to $16,000 on a $320,000 refinance. The origination fee is the biggest slice, typically 1 to 1.5 percent of the loan. Then the appraisal ($400 to $800), title search and insurance ($500 to $1,500, varying wildly by state), credit report, tax service, recording fees ($50 to $300), underwriting ($400 to $900), and optional discount points — each point costs 1 percent of the loan and buys the rate down roughly a quarter point. Get the Loan Estimate from at least three lenders; origination and underwriting fees are the most negotiable lines. And watch for junk fees with creative names — processing, doc prep, funding fee — which are often pure margin dressed up as necessity.

No-closing-cost refinances: free lunch or expensive lunch?

A "no-closing-cost" refinance is not free — the lender covers your costs in exchange for a slightly higher rate, usually 0.125 to 0.375 points above the standard quote. Break-even is immediate, which is perfect if you might move or refinance again soon. But the rate premium lasts the entire loan: on a $320,000 loan, an extra eighth of a point costs about $25 a month, or $9,000 over 30 years. Model it in this calculator by entering zero closing costs and bumping the new rate up instead. The rule of thumb: take the lender credit if your horizon is under five years; pay the costs yourself if you are staying long.

Cash-out, rate-and-term, and the HELOC alternative

Rate-and-term refinances — the kind this calculator models — simply change your rate, your term, or both. Cash-out refinances go further: you borrow more than you owe and pocket the difference, at a rate typically 0.25 to 0.5 points higher than rate-and-term pricing. It can make sense for value-adding renovations or consolidating truly high-rate debt, but it converts home equity — your ownership — back into debt and resets the clock on the larger balance. A HELOC is the flexible alternative: a variable-rate line you draw as needed, paying interest only on what you use. If rates are falling, a HELOC's variable rate falls with them; if rates are rising, locking a fixed cash-out rate wins. Never do a cash-out to fund depreciating spending — cars, vacations, lifestyle — without a plan; that is how equity quietly evaporates.

When refinancing is the wrong move

Do not refinance if you will sell or refinance again before break-even — you will have paid thousands for savings you never collected. Do not refinance a loan with fewer than ten years left just to chase a slightly lower payment; you are deep in the principal-heavy years of amortization, and restarting the clock destroys that progress. Small balances rarely work: a 1 percent drop on $80,000 saves about $53 a month against $4,000-plus in costs — a six-year break-even. If your credit score has slipped since you bought, the rate you are quoted may be worse than the headlines suggest; the best rates go to scores of 740 and above, and most conventional lenders want at least 620. And if you are already near the best available rate, the savings cannot clear the costs — patience beats action.

Credit, seasoning, and rate locks

A refinance triggers a hard credit inquiry — typically a 2 to 5 point dip — plus a new account that lowers your average account age. Most borrowers recover fully within 6 to 12 months, and the long-run effect of on-time payments at a lower balance is positive. Shop smart: FICO treats multiple mortgage inquiries within a 14 to 45 day window as a single inquiry, so compress your lender shopping into two weeks. Timing rules vary by loan type: FHA streamline refinances require 210 days since closing and six on-time payments; VA interest-rate-reduction loans need 210 days from the first payment due date; conventional lenders often want around six months of seasoning. Prepayment penalties are rare on US mortgages originated after 2014, but check older or non-qualified loans. Once you have a quote that makes the break-even work, lock it — rate locks run 30, 45, or 60 days, longer locks cost more, and extension fees run $500 to $1,000 if closing drags. A float-down option lets you capture a lower rate if markets improve while you wait, for a fee.

The tax footnote

Two tax notes, neither of which usually decides the refinance but both of which belong in the lifetime math. First, discount points you pay on a refinance are deductible — but unlike a purchase mortgage, you must spread the deduction evenly over the loan term (a point on a 30-year loan deducts at one three-hundred-sixtieth per month), per IRS Publication 936. Second, the mortgage interest itself remains deductible if you itemize, on up to $750,000 of acquisition debt. Model the after-tax savings if you itemize; ignore both if you take the standard deduction.

Two refinances that pay for themselves: PMI removal and ARM exits

Refinancing is also the escape hatch from costs beyond the rate. If your home has appreciated enough that you now have 20 percent equity, refinancing into a conventional loan drops PMI entirely — on a $320,000 loan at a 0.5 percent PMI rate, that is about $133 a month before any rate improvement, and the combined savings can break even in months. FHA borrowers stuck with permanent mortgage insurance have no other exit. Similarly, if you hold an adjustable-rate mortgage approaching its reset, refinancing into a fixed rate before the adjustment trades uncertainty for a known payment — worth it even at a modest rate premium. Run each scenario here: the calculator does not care why you are refinancing, only whether the numbers work.

Recast vs refinance: the cheaper reset

If your rate is already decent but you came into a lump sum — a bonus, an inheritance, a stock sale — consider a recast instead of a refinance. A mortgage recast (re-amortization) applies your lump sum directly to principal and recalculates the payment on the lower balance, keeping your rate and term. The fee is typically $250 to $500, versus $5,000-plus for a refinance, and there is no appraisal, no title work, and no credit check. Put $50,000 toward a $320,000 balance at 6.5 percent with 25 years left and the payment drops from about $2,161 to roughly $1,823 — $338 less a month for a $300 fee. A recast cannot lower your rate, so it loses to a refinance when rates have fallen meaningfully — but when your rate is already competitive, it is the cheapest payment reduction in American mortgages. Not all servicers offer it and not all loan types qualify, so ask.

The streamline options: FHA and VA

Government-backed loans have express lanes. An FHA streamline refinance skips the appraisal, skips income verification in most cases, and requires minimal paperwork — you must already hold an FHA loan, be current on payments, and show a net tangible benefit (usually at least a 0.5-point rate drop or moving from an ARM to fixed). A VA Interest Rate Reduction Refinance Loan (IRRRL, pronounced "earl") is even leaner: no appraisal, no income docs, a 0.5 percent funding fee, and the requirement that the new rate sit below the old one. Both exist because the government already insures the risk — the paperwork is the only thing being streamlined, not the underwriting standards that matter. If you hold an FHA or VA loan, price the streamline before paying for a full conventional refinance.

Shop it like you mean it: the Loan Estimate checklist

Rates move daily, so collect your Loan Estimates on the same day from at least three lenders — a bank, a credit union, and an online lender is a good mix. Compare Section A (origination charges) line by line, not just the headline rate: one lender's 6.5 percent with $1,200 in origination fees beats another's 6.375 percent with $4,800 in fees if your break-even horizon is short. Check the APR, which folds fees into an annualized rate — it is the closest thing to a standardized price tag. Ask each lender the same two questions: "What lender credit can you offer, and what rate does it cost me?" and "Can you match your competitor's Section A?" Lenders expect this negotiation; borrowers who skip it overpay by thousands. Lock only when the break-even math works on the final locked numbers, not the teaser quote.

With the pre-filled defaults — Current Loan Balance $250,000, Current Interest Rate 7.5%, Remaining Term (Years) 25, New Interest Rate 6.5%, New Loan Term (Years) 30, Closing Costs $3,000 — the Loan Refinance Calculator returns Current Monthly Payment $1,847.48, New Monthly Payment $1,599.13, Monthly Savings $248.35, Break-Even Period (Months) 13, Lifetime Savings $-24,444.17. Change any input and those results update instantly, so you can see exactly how each number you enter moves the answer.