Buying down your interest rate means paying an upfront fee at closing to secure a lower rate on your mortgage. You can do this by purchasing discount points, where one point costs 1% of your loan amount and reduces your rate by a fraction of a percentage point. On a $400,000 mortgage, one point would cost $4,000. There’s also a second approach, the temporary buydown, which lowers your rate for just the first few years of the loan. Both strategies can save you real money, but they work in very different ways.
How Discount Points Work
Discount points are the most common way to permanently buy down your rate. You pay the fee at closing, and your rate stays lower for the entire life of the loan. One point equals 1% of the loan amount, and you can buy fractions of a point (like half a point or a quarter point) if you want a smaller reduction.
The exact rate reduction you get per point varies. It depends on your lender, the type of loan, and broader market conditions. In some environments, one point might shave 0.25% off your rate. In others, the reduction could be larger or smaller. The only way to know is to ask your lender for quotes with and without points so you can compare the numbers side by side.
Here’s a practical example. Say you’re borrowing $350,000 at 7% on a 30-year fixed mortgage. Your monthly principal and interest payment would be about $2,329. If buying one point ($3,500) drops your rate to 6.75%, your payment falls to roughly $2,270, saving you $59 per month. That difference compounds over the life of the loan into more than $21,000 in total interest savings, assuming you keep the mortgage for the full 30 years.
The Break-Even Calculation
Discount points only pay off if you stay in the home long enough to recoup the upfront cost. The math is straightforward:
Cost of points ÷ monthly savings = months to break even
Using the example above: $3,500 ÷ $59 = about 59 months, or just under five years. If you sell the house or refinance before that mark, you’ve spent more on the points than you saved in lower payments. If you stay past the break-even point, every month after that is pure savings.
Before you buy points, think honestly about how long you expect to keep this mortgage. If you’re in a starter home and plan to move in three years, points are likely a bad deal. If you’re settling into a home for the long haul, they can be one of the most effective ways to reduce your total borrowing cost.
Temporary Buydowns: The 2-1 and 3-2-1
A temporary buydown works differently. Instead of permanently lowering your rate, it reduces your payments for the first one to three years of the loan. After that, your rate reverts to the full note rate for the remaining term.
In a 2-1 buydown, your rate is 2 percentage points below the note rate in the first year and 1 percentage point below in the second year. Starting in year three, you pay the full rate. So on a loan with a 7% note rate, you’d pay as if the rate were 5% in year one, 6% in year two, and 7% from year three onward.
A 3-2-1 buydown extends the ramp-up to three years: 3 points below in year one, 2 below in year two, 1 below in year three, then the full rate. Fannie Mae caps temporary buydowns at a three-year period with rate increases of no more than 1 percentage point per year.
The key difference from discount points: a temporary buydown doesn’t change your actual note rate. Your mortgage documents reflect the permanent rate, and you’re legally obligated to pay that rate even if the buydown funds somehow become unavailable. The lender also qualifies you at the full note rate, not the temporarily reduced rate, so it won’t help you qualify for a larger loan.
Who Pays for a Temporary Buydown
Temporary buydowns are often funded by the home seller or builder as a concession to attract buyers. The full cost of the buydown, covering the difference between the reduced payments and the actual note rate for each year, gets deposited into a custodial account at closing. That money is then applied toward your payments as they come due.
You can also pay for a temporary buydown yourself, though this is less common since paying for a permanent rate reduction through discount points typically makes more financial sense if you’re the one writing the check. Where temporary buydowns really shine is in a negotiation: if a seller is willing to contribute toward closing costs, directing those funds into a buydown can meaningfully lower your payments during the years when you’re most cash-strapped from the purchase.
Seller Concession Limits
If a seller or other interested party is funding the buydown, the cost counts toward seller concession limits. For conventional loans on a primary residence or second home, those caps are:
- Down payment under 10%: seller can contribute up to 3% of the sale price
- Down payment of 10% to 24.99%: up to 6%
- Down payment of 25% or more: up to 9%
Both temporary and permanent buydown costs count toward these limits. If the seller is also covering other closing costs like title fees or prepaid taxes, the buydown funds plus those other concessions can’t exceed the cap. FHA and VA loans have their own concession limits, which your lender can confirm during the application process.
When to Lock In Your Buydown
You’ll typically discuss discount points or a temporary buydown when you receive your loan estimate, which comes early in the mortgage process. This is when your lender presents rate options, often showing you what the rate looks like with zero points, one point, or two points. You don’t finalize the decision until you lock your rate, which usually happens after your offer is accepted but before closing.
For temporary buydowns, the funding account must be fully established and funded by the time the lender finalizes the loan. If the seller is paying, this gets handled as part of the closing settlement. Everything, including the buydown terms, must be disclosed to the mortgage insurer and the appraiser, and the arrangement must be documented in a written agreement between the funding party and the borrower.
Deciding Which Option Fits
The choice between discount points and a temporary buydown comes down to your timeline and who’s paying.
Discount points make the most sense when you’re paying out of pocket and plan to keep the mortgage for well beyond the break-even period. They reduce your rate permanently and lower your total interest cost over the life of the loan. If you can get a meaningful rate reduction, say 0.25% per point, and you expect to stay put for seven to ten years or more, points can save you tens of thousands of dollars.
Temporary buydowns make the most sense when someone else is paying, typically the seller or builder, and you want lower payments during the first few years while your income grows or you recover from the cash outlay of buying a home. They don’t save you money over the full loan term the way discount points do, but they ease the financial pressure early on.
In either case, ask your lender to run the numbers both ways. Request a loan estimate showing the rate, monthly payment, and total interest with and without the buydown so you can see exactly what the upfront cost gets you. Compare those figures against what you’d save by simply making a larger down payment instead, since reducing your loan balance also lowers your monthly payment and eliminates private mortgage insurance sooner.