Should I Refinance? Finding Your Break-Even

Refinancing is one subtraction and one division

Every refinance decision reduces to a break-even point: how long it takes the lower payment to repay the cost of getting it.

Break-even = closing costs ÷ monthly saving
$6,400 ÷ $180 = 35.6 months
Stay longer than that → worth it
Move sooner → you paid to lose money

Everything else is detail. The rate drop matters only through the monthly saving it produces, and the closing costs matter only through how long they take to earn back.

Break-even by new rate

A $320,000 balance, 30 years remaining at 7.25%, current payment $2,182.96, with $6,400 in closing costs:

New rate	New payment	Monthly saving	Break-even
6.75%	$2,075.51	$107.45	59.6 months
6.50%	$2,022.62	$160.35	39.9 months
6.25%	$1,970.30	$212.67	30.1 months
6.00%	$1,918.56	$264.40	24.2 months
5.50%	$1,816.92	$366.04	17.5 months

Notice how quickly the picture changes. A quarter-point drop takes over five years to pay for itself. A full point pays back in roughly a year and a half. The old "refinance at 1% lower" heuristic is really a rough proxy for this calculation, and it fails on very large or very small balances.

The trap in the break-even number

Refinancing to a fresh 30-year term restarts the clock. If you are eight years into your current mortgage, a new 30-year loan means 38 total years of payments — and early payments are almost entirely interest.

The monthly saving can be real while the lifetime cost still rises. Two ways to avoid it:

Refinance into a shorter term — a 22-year or 20-year loan keeps your payoff date roughly where it was.
Keep paying the old amount on the new lower-rate loan, sending the difference straight to principal.

The second is often the strongest move available, and it is the same mechanism behind biweekly payment schemes — extra principal, earlier.

What is actually in closing costs

Origination or lender fee, commonly 0.5% to 1% of the loan
Appraisal, typically several hundred dollars
Title search and lender's title insurance
Recording and government fees
Prepaid interest, plus escrow set-up for taxes and insurance

A "no-closing-cost" refinance does not remove these; it rolls them into the balance or buys them back with a higher rate. That still has a break-even, just a hidden one.

Reasons to refinance that are not about rate

Dropping PMI once you have 20% equity, which can be worth more than a small rate change.
Leaving an adjustable rate for a fixed one before an adjustment period.
Shortening the term when income has risen and you want the loan gone sooner.
Removing a co-borrower after a separation, which generally requires a refinance.

Work out your own break-even with the refinance calculator, and compare term structures in the 15 versus 30-year breakdown.

Run your own numbers

Refinance Mortgage Loan / EMI

FAQ

What rate drop makes refinancing worth it?

There is no fixed threshold — it depends on balance and closing costs. On a $320,000 loan with $6,400 in costs, dropping from 7.25% to 6.25% breaks even in about 30 months. On a small balance the same rate drop might never break even.

Does refinancing hurt my credit score?

Modestly and temporarily. The application creates a hard inquiry and the new account lowers your average account age, typically costing a few points that recover within a year. Rate-shopping multiple lenders within a short window is usually treated as a single inquiry.

Can I refinance with no closing costs?

You can avoid paying them upfront, but not avoid them. Lenders either add the costs to your balance or offset them with a higher rate. Compare the total cost over how long you actually expect to stay, not the cash needed on closing day.

Should I refinance into another 30-year term?

Only if you understand the trade. Restarting a 30-year clock several years in means more total interest even at a lower rate. Either refinance into a shorter term, or keep making your old payment amount so the difference goes to principal.

How much equity do I need to refinance?

Conventional refinances generally want at least 20% equity to avoid mortgage insurance, though loans exist at lower thresholds. Some government-backed streamline programmes have reduced requirements for existing borrowers.

Sources

Primary references used for the figures and rules on this page.

Compare loan offers — Consumer Financial Protection Bureau
Primary Mortgage Market Survey — Freddie Mac