Should You Refinance in 2026? The Break-Even Math Explained

Refinancing replaces your current mortgage with a new one, usually to lower your rate, shorten your term, or pull cash out of your equity. Whether it makes sense in 2026 depends on your current rate, how long you'll stay in the home, and a few often-overlooked costs.

The Break-Even Test

The single most useful calculation is the break-even: how many months until your interest savings cover your closing costs?

Formula: total closing costs ÷ monthly payment savings = break-even months.

If your closing costs are $6,000 and the new loan saves you $300/month, your break-even is 20 months. If you plan to stay in the home longer than that, the refinance likely makes sense. If you're moving in a year, it doesn't.

How Much Lower Should the New Rate Be?

The old rule of thumb was a 1% reduction. Today the answer depends on loan size: on a $500K+ loan, even 0.375%–0.50% can be worth refinancing if you plan to stay several more years. On a smaller balance, you generally need a bigger spread to justify the closing costs.

Cash-Out Refinances Have Different Math

A cash-out refi replaces your mortgage with a larger one and gives you the difference in cash. It almost always carries a slightly higher rate than a no-cash refinance, and the loan-to-value matters more.

The right time to do a cash-out is when (a) the rate on your existing first mortgage is high enough that replacing it makes sense, or (b) you can't reasonably do what you need with a HELOC instead. If your current first mortgage rate is low, keeping it and tapping equity via a HELOC is often the smarter move.

The Refinance Costs People Forget

Lender fees, title and escrow, recording fees, appraisal, and prepaid taxes/insurance all add up. So does extending your loan back to 30 years if you've already paid down 5+ years on the original term. A 30-year refi that saves $200/month but resets your clock can cost more over the life of the loan than your old higher-rate loan would have.

Streamline Refi Options

If you currently have an FHA or VA loan, you may qualify for a streamline refinance (FHA Streamline or VA IRRRL). These programs require less documentation and lower closing costs, but only work for rate-and-term, not cash-out.