When does refinancing actually make sense?
The half-point rule is a start, not an answer. Break-even math, time horizon and your goals tell you whether to act.
Kevin Sullivan, Refinance LeadJuly 30, 2026 · 6 min read
You have probably heard that refinancing makes sense when rates drop by a certain amount, often half a percentage point or one full point. Rules of thumb are a fine place to start, but the right answer depends on your balance, your closing costs and how long you will keep the new loan. Here is the math we run for every refinance conversation.
The break-even point
Refinancing costs money: typically 2% to 3% of the loan amount for lender fees, title insurance, attorney fees and recording. The break-even point is how many months of payment savings it takes to recover those costs.
Say you owe $520,000 at 7.25% and can refinance to 6.25% with $9,800 in costs. Your principal and interest drops from about $3,547 to $3,202, saving $345 a month. Divide $9,800 by $345 and you break even in about 28 months. If you plan to stay at least three more years, the refinance likely pays off.
Why the balance matters
Half a point on a $150,000 balance saves about $45 a month, which may never justify closing costs. The same half point on a $750,000 jumbo balance saves more than $230 a month. That is why Greater Boston homeowners with larger balances often benefit from smaller rate drops than the rule of thumb suggests.
Good reasons to refinance beyond the rate
- Removing FHA mortgage insurance by moving to a conventional loan once you have 20% equity.
- Switching from an adjustable rate that is about to reset to a fixed rate.
- Shortening your term from 30 to 15 or 20 years to save interest and own your home sooner.
- Removing a former spouse from the loan after a divorce.
- Consolidating a first mortgage and a high-rate HELOC.
Watch out for resetting the clock
If you are eight years into a 30-year mortgage and refinance into a new 30-year loan, your payment falls partly because you are stretching the balance over more years. You might pay more interest over the life of the loan even with a lower rate. We usually suggest matching the remaining term, for example a 20 or 22-year loan, or making extra principal payments to stay on your original payoff date.
A good refinance lowers your total cost, not just your monthly payment.
No-cost refinances
In a no-cost refinance, the lender covers closing costs in exchange for a slightly higher rate. Your break-even point is immediate, which suits homeowners who may sell or refinance again within a few years. If you expect to keep the loan a long time, paying costs for the lower rate usually wins.
What to do next
Run your numbers through our refinance savings calculator with your current balance, rate and years remaining. If the break-even point lands comfortably inside your time horizon, send us your latest mortgage statement. We will return a written comparison within one business day, and if the timing is not right, we will set a rate alert and call you when it is.
Kevin runs our rate alert program and will tell you plainly when a refinance does not make sense yet.
This article is for general education and is not financial, tax or legal advice. Figures are examples for illustration only.
