What Is Rate Buydown?
Rate buydowns let borrowers trade upfront cash for a lower monthly payment. A permanent buydown costs one discount point (1% of the loan amount) per roughly 0.25% rate reduction. On a $400,000 loan, one point costs $4,000 and drops the rate from, say, 7.0% to 6.75%, saving about $67 per month. Temporary buydowns — the 2-1 and 3-2-1 structures — reduce the rate for the first two or three years before reverting to the full note rate. Builders frequently offer temporary buydowns as buyer incentives on new construction, effectively subsidizing early payments without cutting the sale price. The decision to buy down a rate comes down to breakeven math: how many months of savings does it take to recoup the upfront cost? If you plan to hold past the breakeven point, the buydown pays for itself. If you're flipping or selling within a few years, skip it.
A rate buydown is an upfront payment — typically in the form of discount points — that reduces the interest rate on a mortgage, either temporarily for the first few years or permanently for the life of the loan.
At a Glance
- Permanent Buydown: 1 point (1% of loan) typically reduces the rate by ~0.25% for the full loan term
- 2-1 Temporary Buydown: Rate is 2% below note rate in year one, 1% below in year two, then full rate from year three onward
- 3-2-1 Temporary Buydown: Rate reduced 3% in year one, 2% in year two, 1% in year three, full rate from year four
- Who Pays: Buyer, seller, or builder — seller/builder-paid buydowns are common concessions
- Breakeven Period: Typically 4-7 years on a permanent buydown, depending on rate and loan size
- Tax Deductibility: Discount points paid by the buyer are generally tax-deductible in the year of purchase for a primary residence
How It Works
A permanent rate buydown works like prepaid interest. When you pay one discount point at closing — $3,500 on a $350,000 loan — the lender reduces your rate for the entire loan term. The standard ratio is one point per 0.25% rate reduction, though this varies by lender and market conditions. Some lenders offer fractional points: half a point for a 0.125% reduction.
The math is straightforward. On a $350,000 30-year loan, dropping the rate from 7.0% to 6.5% (two points, costing $7,000) reduces the monthly payment from $2,329 to $2,212 — a savings of $117 per month. Dividing the $7,000 cost by the $117 monthly savings gives a breakeven of 60 months, or five years. Every month after that, the savings are pure profit. Over 30 years, those two points save $35,120 in total interest.
Temporary buydowns use a different mechanism. The lender collects the full buydown cost upfront and deposits it into an escrow account. During the reduced-rate period, the escrow account subsidizes the difference between the actual payment and the reduced payment. The borrower qualifies at the full note rate, not the temporary rate — this is critical. A 2-1 buydown on a 7% loan means payments at the 5% rate in year one, 6% in year two, and 7% from year three onward.
On a $400,000 loan, a 2-1 buydown saves the borrower approximately $468/month in year one and $241/month in year two, totaling roughly $8,508 in payment reductions. The cost to fund this buydown is around $8,500 — often paid by the seller or builder as a closing concession.
Builders in markets like Phoenix, Dallas, and Raleigh have used 2-1 and 3-2-1 buydowns aggressively since 2023 to move inventory. Rather than cutting the sale price (which affects comps and appraisals), builders fund a temporary buydown that reduces the buyer's payments during the highest-rate years. If rates decline and the buyer refinances before the buydown expires, any unused funds in the escrow account typically revert to the party who funded it.
Real-World Example
Marcus and Tanya Williams purchased a new-construction townhome in Apex, North Carolina, for $425,000 in September 2024. The builder, a regional firm with 40 unsold units, offered a 2-1 buydown funded entirely by the builder as a sales incentive — worth $9,200 in concessions.
Their base mortgage rate was 6.875% on a $382,500 loan (10% down). Without the buydown, their monthly principal and interest payment would have been $2,514. With the 2-1 buydown, they paid at 4.875% in year one ($2,024/month) and 5.875% in year two ($2,264/month), saving $5,880 in year one and $3,000 in year two.
Marcus ran the numbers against a permanent buydown. Two points on their loan would have cost $7,650 and saved $157/month permanently — a 49-month breakeven. Since they planned to hold the townhome for at least 10 years, a permanent buydown would have saved more long-term. But the builder's free 2-1 buydown saved $8,880 with zero out-of-pocket cost. The builder preferred this structure because it maintained the $425,000 sale price on public records, supporting appraisal values across the remaining inventory.
Marcus used the $490/month year-one savings to accelerate their emergency fund and begin saving for their next investment property — a small multifamily in Durham they purchased 18 months later.
Pros & Cons
- Permanent buydowns reduce total interest paid over the loan term by tens of thousands of dollars
- Temporary buydowns lower payments during the initial high-rate years, easing cash flow pressure
- Builder or seller-funded buydowns provide rate relief at no cost to the buyer
- Discount points may be tax-deductible, improving the effective return on the upfront investment
- Buydowns can be combined with other strategies — a seller concession applied to points plus a rate-lock float-down
- Permanent buydowns require significant upfront cash that could otherwise be deployed as a down payment or into another investment
- Breakeven periods of 4-7 years mean early sales or refinances waste the upfront cost
- Temporary buydowns create payment shock when the full rate kicks in — borrowers must budget for the increase
- Points are not always refundable if the loan falls through before closing, depending on lender policy
- The 0.25% reduction per point is a guideline, not a guarantee — some lenders offer less favorable ratios
Watch Out
- Breakeven Blindspot: Many buyers pay for a permanent buydown without calculating the breakeven period. If you're likely to sell or refinance within five years, those points are wasted money. Run the numbers with a specific hold timeline.
- Temporary Buydown Qualification: Borrowers must qualify at the full note rate, not the temporary reduced rate. A 2-1 buydown on a 7% loan does not help you qualify for a bigger loan — it only reduces early payments.
- Refinance Waste: If rates drop 1.5-2% and you refinance, the remaining value of a permanent buydown disappears. You cannot transfer points to a new loan. Factor refinance probability into your decision.
- Builder Buydown vs. Price Reduction: A builder offering a $10,000 buydown instead of a $10,000 price cut is protecting their comps. The buydown helps your cash flow short-term, but the price reduction builds equity immediately. Evaluate which benefits your specific situation more.
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The Takeaway
Rate buydowns are a math problem, not a gut decision. Permanent buydowns pay off handsomely for long-term holders — investors keeping a rental property for 10-15 years recover the point cost and then save pure interest for decades. Temporary buydowns are most valuable when someone else pays for them — builder concessions on new construction or seller credits in a buyer's market. For investors, the key question is always opportunity cost: does the upfront point payment earn more here than it would as additional down payment, rehab capital, or reserves? Run the breakeven calculation on every deal.