When Does Refinancing Make Financial Sense?

The Break-Even Calculation

Two numbers drive every refi decision: how much you save per month, and how much it costs to close. Divide closing costs by monthly savings to get your break-even point — the number of months before the refi has paid for itself.

Example: $4,500 in closing costs ÷ $250/month savings = 18-month break-even. If you'll stay in the home longer than 18 months, the refi makes financial sense.

Old Rule, New Context

The classic guideline — "refinance if you can drop your rate by 1%" — is outdated. With higher loan balances common today, even 0.5% can be meaningful. We run break-even math for every borrower regardless of rate drop.

Conversely, a 1% rate drop on a $80,000 balance with $4,500 closing costs is a 56-month break-even. Probably not worth it.

Costs to Include

• Lender fees (origination, processing, underwriting)
• Appraisal ($500–$700, sometimes waived)
• Title insurance (reissue rate often available, saves 30–50%)
• Florida documentary stamp tax on the new mortgage ($0.35 per $100)
• Florida intangible tax on the new mortgage ($0.20 per $100)
• Recording fees
• Prepaid interest, tax, and insurance escrow setup

Avoid lender-paid "no cost" refinances unless you've checked the rate trade-off. "No cost" usually means a higher rate that pays the lender enough to cover the closing costs.

Beyond Rate: Other Reasons to Refi

• Drop PMI on a Conventional loan once you have 20%+ equity
• Switch from FHA to Conventional to eliminate MIP for life
• Shorten the term (30-year → 15-year) to build equity faster
• Lock in fixed if you're in an ARM about to adjust
• Remove a co-borrower after a divorce
• Cash-out for home improvement or debt consolidation (see separate article)

How Long Does Refinancing Take?

Typical refinance closes in 30–45 days. Streamline products (VA IRRRL, FHA Streamline) can close in 15–25 days because they skip the appraisal and full income verification.

You can lock your rate for 30, 45, or 60 days at the start of the process. Longer locks cost more.

Don't Forget the Tax Side

The mortgage interest deduction still applies to refinanced loans, but only on the portion of the new loan that doesn't exceed the old balance plus any improvements. Cash-out for non-housing purposes (paying off cars, vacations) doesn't qualify for the deduction.

If the refi extends your loan term back to 30 years, you may pay more total interest over the life of the loan even at a lower rate. That doesn't mean it's a bad decision — monthly cash flow matters — but it's worth running the full life-of-loan numbers.