You can almost always pay a little extra upfront to get a lower interest rate — "buying down" the rate with discount points. Whether that's a smart move or wasted money comes down to a single number you can calculate yourself: the break-even.
What points actually are
A discount point is prepaid interest. One point equals 1% of your loan amount, paid at closing, in exchange for a lower rate for the life of the loan. (Don't confuse discount points with origination points, which are a lender fee — a different thing.) You're essentially pre-paying to rent a cheaper rate.
The trade-off
Points cost you more now to save you money every month. So the whole question is: how long until those monthly savings add up to what you paid upfront?
The break-even calculation
It's simple division:
Break-even (months) = cost of the points ÷ monthly savings
Hypothetical example — illustrative rate, not a quote or offer of credit.
Say you have a $300,000 loan. One point costs $3,000 and lowers your payment by about $50 a month. Your break-even is $3,000 ÷ $50 = 60 months — five years. Keep the loan past five years and the points pay off; sell or refinance before then and you've lost money on the deal.
What to weigh beyond the math
- How long you'll actually keep the loan. If you'll move or refinance before break-even, don't buy points.
- The chance rates fall and you refinance. This is the big one. If you buy points and then refinance into a lower rate next year, you forfeit the remaining benefit you paid for. In a falling-rate environment, points are a gamble.
- Opportunity cost of the cash. Those dollars might do more as a larger down payment, in reserves, or elsewhere.
- Who pays. A seller-paid buydown changes the math entirely, and a temporary buydown (like a 2-1) is a different animal than a permanent point buy-down — worth understanding before you choose.
The move
Run your break-even, compare it honestly to how long you'll realistically keep the loan, and factor in the odds you'll refinance. Points make sense for a long hold with stable or rising rates. They're a weak bet if there's a real chance you'll refinance soon.
Point costs, rate reductions, and buydown structures vary by lender and shift with the market — ask your loan officer to run the exact break-even for your scenario before you decide.