Why this question comes up so much right now
The average 30-year fixed rate was 7.03% the week of September 24, 2026 (Freddie Mac Primary Mortgage Market Survey, September 24, 2026). When rates sit there, builders in places like Meridian, Star and Kuna often offer to help with your rate instead of lowering the price, which is why “builder rate buydown” is one of the first things buyers ask me about.
Before real estate, I spent eleven years as a financial advisor. So I’m going to explain this the way I’d explain it at a kitchen table: what a buydown is, the two main kinds, and the one comparison that matters.
What a buydown actually is
A buydown is money paid at closing to lower your interest rate. That money can come from you, from the builder, or from a mix. On new construction it often comes from the builder as an incentive, sometimes with the condition that you use the builder’s preferred lender.
There are two basic kinds:
A permanent buydown lowers your rate for the life of the loan. You (or the builder) pay “discount points” up front, and the rate drops for all 30 years, or until you sell or refinance.
A temporary buydown lowers your rate for the first year or two, then it goes back up to the full rate written in your loan. The most common version is the 2-1 buydown: two percentage points lower in year one, one point lower in year two, then the full rate from year three on. The cost is the total of those payment differences, and it’s set aside at closing to cover them.
Neither one is a trick. They’re tools that do different jobs. A permanent buydown is about the long run. A 2-1 buydown is about breathing room in the first two years, maybe while you’re furnishing a new home, finishing the landscaping, or waiting for a raise.
A worked example (illustration, not a quote)
This is an illustration, not a quote. The numbers below are round, hypothetical figures I picked to show how the math works. Real buydown pricing changes daily and differs by lender, loan program and credit. Principal and interest only; taxes, insurance and HOA dues are left out.
Say you’re buying a new home in Meridian with a $400,000 loan on a 30-year fixed at a hypothetical 7.00%. The principal-and-interest payment is about $2,661 a month.
The builder offers a $20,000 incentive, and you can use it one of three ways:
Option A: $20,000 off the price. Your loan drops to $380,000 at 7.00%. Payment: about $2,528.
Option B: a permanent buydown. Suppose the lender says $20,000 buys the rate down to 6.25% (an assumption for this example only). Loan stays at $400,000. Payment: about $2,463.
Option C: a 2-1 buydown. Year one at 5.00%: about $2,147. Year two at 6.00%: about $2,398. Year three onward at 7.00%: $2,661. In this example the 2-1 costs about $9,300 of the $20,000. Ask the builder in writing whether the rest can go toward closing costs.
Looking only at the monthly payment, Option B wins from day one, and Option C feels fantastic for a year. But the monthly payment isn’t the whole story.
Compare total cost over the years you’ll actually keep the loan
Here’s the comparison I’d run for anyone. Add up every payment you’ll make, plus the loan balance you’ll still owe when you sell or refinance. That’s the true cost of the loan over your timeline.
Comparing Option A (price cut) to Option B (permanent buydown) in the same illustration:
- Keep the loan 5 years: the price cut comes out about $11,700 ahead.
- Keep the loan 10 years: the price cut is still about $3,000 ahead.
- Around year 12: they roughly break even.
- Keep it all 30 years: the buydown comes out about $23,500 ahead.
Why? The buydown saves you about $65 a month compared to the price cut, but the price cut means you owe $20,000 less from the very first day. It takes years of those monthly savings to catch up.
And here’s the part people forget: if you refinance, the permanent buydown is gone. Nobody can tell you where rates will go, and I won’t try. But if there’s a real chance you’d refinance in a few years, a permanent buydown has less time to pay you back. A price reduction stays with you no matter what.
The 2-1 buydown is a different decision. It doesn’t change your long-run rate at all, so it’s really a question of whether payment relief in years one and two is worth more to you than putting that money toward price or closing costs.
How to think about it
There isn’t a universally right answer. Here’s how I’d sort it:
- Planning to stay a long time and unlikely to refinance? A permanent buydown can make sense.
- Might move or refinance within several years? A price reduction often holds up better.
- Tight on cash in the first couple of years? A 2-1 buydown can help, but only if the full-rate payment in year three is one you’re comfortable with today.
- Short on cash to close? Closing-cost help may matter more than any of these.
A price reduction can also affect your down payment, your appraisal and possibly your property taxes, and none of that is in the illustration above. Talk with your lender, and get a written comparison of each option on the same loan.
Questions to ask the builder and the lender
- Is the incentive tied to using a specific lender or closing by a specific date?
- If I choose a permanent buydown, exactly how much rate does the money buy, in writing?
- On a 2-1 buydown, what happens to any unused funds if I sell or refinance early?
- Can any leftover incentive go toward closing costs or the price instead?
- Which payment will I be qualified on?
What I’d do if it were me
I’d decide how long I honestly expect to keep the loan, then ask the lender for all three options priced on the same day. Then I’d put them side by side over that timeline using payments plus remaining balance. Usually, one option clearly wins for your situation and the decision gets a lot calmer.
The builder incentives guide covers what else builders offer and how to ask. If you’re a first-time buyer, look at Idaho’s first-time home buyer programs too, and ask your lender whether any of them can be combined with a builder incentive. And if you’d like me to run your actual numbers, that’s exactly the kind of thing I enjoy.