Buying down your interest rate is worth it if you plan to keep the loan long enough to recoup the upfront cost, which typically takes five to ten years depending on the rate reduction. The math is straightforward once you know your break-even point, but the decision also depends on what else you could do with that cash and whether you might refinance before you see the savings.
How Discount Points Work
A discount point is a fee you pay at closing to lower your mortgage interest rate. One point costs 1% of your loan amount. On a $300,000 mortgage, one point costs $3,000. On a $400,000 mortgage, it’s $4,000.
The rate reduction you get per point varies by lender, loan type, and market conditions. There’s no universal rule like “one point always drops your rate by 0.25%.” In practice, the reduction can range from about 0.125% to 0.375% per point. The Consumer Financial Protection Bureau notes that the size of the reduction depends on the specific lender and the overall mortgage market, so you need to compare what different lenders offer for the same number of points.
You can buy fractions of a point too. If one point costs more than you want to spend, you might buy half a point for 0.5% of the loan amount and get a smaller rate reduction.
Calculating Your Break-Even Point
The break-even point tells you how many months of lower payments it takes to recover the money you spent on points. The formula is simple: divide the cost of the points by the monthly savings.
Here’s a real example. On a $300,000 loan, one point costs $3,000 and drops the rate from 7% to about 6.75%. That lowers your monthly payment from roughly $1,996 to $1,946, saving you $50 per month. Divide $3,000 by $50 and your break-even point is 60 months, or five years. Every month after that, the $50 savings is money in your pocket.
If the rate reduction is larger, say 0.375% per point, your monthly savings increase and the break-even period shrinks. If the reduction is smaller, you wait longer to come out ahead. Always ask each lender for exact numbers so you can run this calculation with real figures, not estimates.
When Buying Down Makes Sense
The strongest case for buying points is when you’re confident you’ll stay in the home and keep the same loan well past the break-even point. If your break-even is six years and you plan to live there for fifteen, you’d enjoy nine years of pure savings. On a $50 monthly reduction, that’s $5,400 in savings beyond what you paid for the point.
Points also make more sense when rates are relatively high and you don’t expect a refinancing opportunity anytime soon. If you lock in a permanent rate reduction during a period of elevated rates, you benefit immediately and continue benefiting for the life of the loan.
Another factor: your tax situation. The IRS allows you to deduct mortgage points in the year you pay them, as long as the loan is for your principal residence and you itemize deductions. The points must be computed as a percentage of the loan principal, shown clearly on your settlement statement, and paid with your own funds (not borrowed from the lender). If the seller pays for your points, you can still treat them as deductible, but you’ll need to reduce your cost basis in the home by the same amount. This deduction effectively lowers the real cost of buying points, which shortens your break-even timeline.
When It Probably Isn’t Worth It
If you sell the home or refinance before hitting your break-even point, you lose money on the deal. The savings from the lower rate simply don’t add up fast enough to cover what you paid upfront. This is the biggest risk, and it’s easy to underestimate.
Consider a scenario where rates are high today and widely expected to fall. If you buy two points to lower your rate, then refinance 18 months later when market rates drop, you’ve spent thousands of dollars for savings you only collected for a year and a half. That upfront cost doesn’t transfer to your new loan.
Points also may not be the best use of limited cash. The money you spend on points is money that could go toward a larger down payment (reducing your loan amount and possibly eliminating private mortgage insurance), building an emergency fund, or investing elsewhere. If you’re stretching to cover closing costs, tying up additional cash in points can leave you financially tight right after buying a home.
Shorter loan terms also reduce the value of points. On a 15-year mortgage, your monthly payment is already lower-interest and higher-principal compared to a 30-year loan, so the dollar savings per point tend to be smaller. The break-even period stays roughly the same, but you have fewer years after break-even to accumulate savings.
Temporary Buydowns Work Differently
A temporary buydown, such as a 2-1 or 3-2-1 buydown, is not the same as paying discount points. Instead of permanently reducing your rate, a temporary buydown lowers it for the first one to three years of the loan, then steps it up by 1% each year until it reaches the original note rate.
In a 2-1 buydown on a loan with a 7% note rate, you’d pay as if the rate were 5% in year one and 6% in year two, then 7% for the remaining 28 years. The cost of the reduced payments is funded upfront through a buydown account, often paid by the seller or builder as a concession to close the deal.
The key difference: temporary buydowns don’t save you money over the life of the loan the way permanent points do. They reduce your payments early on, which can help with cash flow in the first few years, but your lender qualifies you based on the full note rate regardless. They’re available on fixed-rate mortgages for primary residences and second homes, but not for investment properties or cash-out refinances.
If a seller is offering to pay for a temporary buydown, compare that offer against having the seller pay for permanent discount points instead. A permanent reduction benefits you for the entire loan term, while a temporary buydown only helps for two or three years.
How to Decide
Start by asking your lender for a loan estimate with and without points. Federal rules require lenders to show you the cost and rate impact clearly. Compare the two scenarios and calculate your break-even using the simple division: cost of points divided by monthly savings.
Then ask yourself three questions. First, how long do you realistically expect to keep this loan? If you’re likely to move or refinance within five years, points rarely pay off. Second, do you have the cash to spare without weakening your financial position? Points should come from funds you can comfortably part with, not from your last reserves. Third, what else could that money do? If you’re choosing between one point ($3,000) and keeping that cash invested or in savings, think about what return you’d need elsewhere to match the guaranteed savings from a lower rate.
The guaranteed nature of point savings is worth noting. Unlike investments that fluctuate, a lower mortgage rate saves you a fixed, predictable amount every single month. For borrowers who value certainty and plan to stay put, that reliability can tip the decision toward buying points.