When Does Refinancing Make Sense?
The classic rule of thumb is that refinancing is worth considering when the new rate is at least 0.5-1% lower than the current rate, though the real answer depends more on the break-even point — how long it takes for monthly savings to cover the closing costs — compared to how long you plan to stay in the home.
The Break-Even Point Explained
Dividing closing costs by the monthly payment savings gives the break-even point in months. If refinancing costs $6,000 and saves $200 a month, break-even is 30 months — refinancing only pays off if you plan to keep the loan (or stay in the home) longer than that.
Resetting the Clock: A Hidden Cost
Refinancing into a new 30-year term resets the amortization schedule, meaning early payments go disproportionately toward interest again, just like at the start of any new mortgage. Someone 10 years into a 30-year mortgage who refinances into another 30-year term is effectively extending their total payoff timeline by a decade, even if the rate is lower — a shorter refinance term (like 20 or 15 years) avoids this if the goal is a lower rate without stretching the payoff date.
Cash-Out Refinancing
A cash-out refinance replaces the mortgage with a larger loan, with the difference paid out in cash — commonly used for home improvements, debt consolidation, or other large expenses. Since it increases the loan balance, it typically increases the total interest paid over the life of the loan even if the rate is lower than the original mortgage.
Other Costs to Watch For
Beyond closing costs, refinancing can involve appraisal fees, title insurance, and sometimes prepayment penalties on the original loan — all of which should factor into the break-even calculation. Rate-and-term refinances (no cash out, just a better rate or term) are usually the simplest and cheapest type to execute.