The surge of homeowners who locked in mortgages at 7–8% rates during 2022 and 2023 — when the Federal Reserve was hiking rates aggressively — have been watching interest rates carefully ever since. As rates have declined from their 2023 highs and approached the mid-5% to 6% range in 2025–2026, the question of whether to refinance has become genuinely live for millions of borrowers. The decision is not simple, because refinancing has a cost — typically $3,000 to $6,000 in closing fees — and you only benefit if you stay in the home long enough to recoup that cost through lower monthly payments.
The "0.75% rule" is the commonly cited threshold: refinancing generally makes financial sense if you can reduce your interest rate by at least 0.75 percentage points and you plan to stay in the home long enough to pass the break-even point. This article walks through the exact math of the break-even calculation, explains the cases where refinancing makes sense for reasons beyond rate reduction, and identifies the situations where it clearly does not.
The Break-Even Calculation
The core of any refinance decision is simple: how many months of reduced payments does it take to recover the closing costs? This is the break-even period. If you plan to stay in the home past that period, refinancing saves you money. If you plan to move or sell before reaching break-even, refinancing costs you money.
Break-even months = Total Closing Costs ÷ Monthly Payment Reduction
If you plan to stay in the home longer than break-even months → Refinance
If you plan to stay less time → Do not refinance
Current loan: $300,000 at 7.5%, 30-year fixed
Current P&I payment: $2,098/month
New loan: $300,000 at 6.5%, 30-year fixed
New P&I payment: $1,897/month
Monthly savings: $2,098 − $1,897 = $201/month
Estimated closing costs: $6,000
Break-even: $6,000 ÷ $201 = 29.9 months (≈ 30 months)
If you plan to stay in the home 5+ years: Refinancing saves money.
If you plan to sell in 2 years: Refinancing loses money (~$3,600 net cost).
The monthly payment figures above use the standard mortgage payment formula. For the full amortization picture — showing how much total interest you save over the life of the new vs. old loan — a mortgage calculator is essential. On a 30-year loan, dropping from 7.5% to 6.5% saves roughly $72,400 in total interest paid over the full term. But the "total interest saved" figure is misleading on its own: you only capture those savings if you hold the loan until maturity, which most homeowners do not.
Closing Costs: What Refinancing Actually Costs
Closing costs for a refinance typically run between 2% and 3% of the loan balance, though they vary widely by lender, state, and loan size. On a $300,000 loan, 2% = $6,000. These costs cover:
Lender fees (origination fee, underwriting fee): typically $1,000–$2,000, though some lenders advertise "no-fee" refinances that roll costs into a higher rate instead.
Title insurance and title search: $500–$1,500 depending on state and home value.
Appraisal: $400–$600, required unless the lender offers an appraisal waiver.
State and local taxes/recording fees: varies by state; in some states (Florida, New York) these can add significantly to closing costs on refinances.
Some lenders offer "no-closing-cost" refinances where they pay your closing costs in exchange for a rate 0.125–0.375% higher than the standard rate. This can be advantageous if your break-even period would otherwise be very long, or if you think you might move within 3–5 years. The trade-off: you pay that higher rate for as long as you hold the loan, which can exceed the closing cost savings if you stay long-term.
When Rate Reduction Isn't the Only Reason to Refinance
The break-even calculation assumes the only benefit of refinancing is the monthly payment reduction from a lower rate. But there are four other scenarios where refinancing makes sense even when the rate improvement is smaller than 0.75%.
Removing Private Mortgage Insurance (PMI). If you originally purchased with less than 20% down and your home has since appreciated, refinancing into a new loan at 80% LTV or lower eliminates PMI — which typically costs 0.5%–1.5% of the loan balance annually. On a $300,000 loan, that is $1,500–$4,500 per year. Eliminating PMI often justifies refinancing even at the same interest rate, if the new loan removes the insurance requirement. See our article on PMI vs. MIP for the full breakdown.
Switching from an adjustable-rate mortgage (ARM) to a fixed-rate mortgage. If you have a 5/1 ARM that is approaching its first adjustment period, refinancing into a fixed-rate mortgage locks in certainty. The value of this certainty is difficult to quantify, but if rates are currently low relative to the expected adjustment range and you plan to stay in the home long-term, locking in a fixed rate eliminates interest rate risk even if the fixed rate is slightly higher than the current ARM rate.
Shortening the loan term. Refinancing from a 30-year to a 15-year mortgage typically offers a rate 0.5%–0.75% lower than the 30-year, and eliminates 15 years of interest payments. Monthly payments are higher, but total interest paid is dramatically less. On a $300,000 loan at 6.5% 30-year vs. 5.75% 15-year: the 30-year payment is $1,897/month with total interest of $382,900. The 15-year payment is $2,487/month with total interest of $147,700 — a $235,200 difference in total interest, in exchange for paying $590 more per month.
Cash-out refinancing. A cash-out refinance increases the loan balance to extract equity as cash. This can make sense at low interest rates for home improvements that add value, consolidating high-interest debt (replacing 22% credit card debt with 6.5% mortgage debt saves substantially), or other compelling financial needs. However, it resets the loan term, increases the balance, and extends the payoff date. Cash-out refinancing should be evaluated separately from rate-reduction refinancing — the calculation is different because you are changing the loan principal, not just the rate.
When Not to Refinance
Several situations make refinancing clearly inadvisable, regardless of the rate available.
You are close to paying off your current loan. In the first years of a mortgage, almost all of each payment goes to interest. But by year 20 of a 30-year loan, a significant portion of each payment is principal. Refinancing resets this amortization clock — you start again at year 1 of a new 30-year loan, which means your initial payments are once again mostly interest. If you have 8 years left on your current loan, refinancing into a new 30-year extends your debt by 22 years and costs far more in total interest than it saves in monthly payment reduction.
You are planning to move within 1–2 years. As the break-even calculation shows, closing costs are only recovered over time. If your horizon is short, refinancing is a money-losing transaction. The 2026 real estate market may make this especially relevant: if you refinanced to access equity or if you are considering downsizing, make sure the break-even period falls within your expected ownership horizon.
Your credit score has worsened since your original loan. If your FICO score has dropped significantly — due to missed payments, new debt, or other factors — you may not qualify for the rate you need to make refinancing worthwhile. A borrower who originally qualified at 720+ FICO getting rates at 720+ may now qualify at a much higher rate if their score has fallen to the 650–680 range. Always check your credit score before beginning a refinance inquiry.
To model the exact payment at any rate and loan balance, our Mortgage Calculator shows the full P&I payment. For understanding how the amortization schedule changes through a refinance, our article on How Mortgage Amortization Works explains the math in detail. And for context on the PMI scenarios that can make refinancing attractive beyond rate alone, see PMI vs. MIP Explained.