When Should You Refinance Your Mortgage? Break-Even Math and Common Reasons

Being your "lender for life" means I keep an eye on my past clients' loans and reach out when a refinance might help. Just as often, I tell people it's not worth it yet. Here's how I make that call.

Common reasons to refinance

Lower your rate and payment when market rates are meaningfully lower than yours.
Remove mortgage insurance, for example moving from FHA to conventional once you have enough equity.
Shorten your term, like moving from a 30-year to a 15-year loan, to pay off your home faster.
Take cash out for renovations or to consolidate higher-interest debt.
Remove a borrower after a divorce or other life change.

The break-even math

Refinancing has closing costs. The simplest test is your break-even point:

Total refinance costs ÷ monthly savings = months to break even

Example: A refinance costs $4,500 and lowers your payment by $150 a month. $4,500 ÷ $150 = 30 months. If you'll stay in the home and keep the loan for well over two and a half years, it likely pays off. If you might move next year, it probably doesn't.

Watch the term reset

If you're five years into a 30-year loan and refinance into a new 30-year loan, your payment drops partly because you've stretched the remaining balance over 30 more years. That can mean paying more total interest. Sometimes a 20- or 15-year term, or simply making extra principal payments on the new loan, gives you the best of both.

Cash-out: compare your options

A cash-out refinance replaces your whole loan. If your current rate is low, a home equity loan or line of credit might be cheaper, since it leaves your first mortgage alone. Compare both before deciding.

When to wait

The savings are small compared to the costs.
You plan to move before reaching break-even.
Your credit has dipped since your original loan.
You'd be extending your loan by many years without a clear benefit.

Rates change every day, so I don't publish them here. If you want me to watch your loan and let you know when a refinance would actually save you money, reach out and I'll keep an eye on it for you.

Frequently asked questions

How do I calculate my refinance break-even point?

Divide your total closing costs for the refinance by your monthly payment savings. If the refinance costs $4,500 and saves $150 a month, the break-even point is 30 months.

Can I refinance to get rid of FHA mortgage insurance?

Often, yes. If you've built enough equity, refinancing from FHA into a conventional loan can remove mortgage insurance, as long as the new rate and costs still make sense.

What is a cash-out refinance?

A cash-out refinance replaces your mortgage with a larger loan and gives you the difference in cash, often used for home improvements or paying off higher-interest debt. It increases your loan balance, so it's worth comparing against a home equity loan or line of credit.