Mortgage Rate Buydowns Explained: 2-1, 3-2-1, and Permanent Buydowns in Arizona

Almost every buyer I sit down with in Maricopa County right now asks some version of the same question: “Can we do anything about the rate?” The answer is yes — but the honest version of that answer is more complicated than what you see in a builder’s flyer or a lender’s Instagram post.

I hold a mortgage license in addition to my real estate license, which means I get to look at both sides of these deals: the purchase contract and the rate sheet. That combination is why I’m writing this post. A mortgage rate buydown in Arizona can be a genuinely great tool, and it can also be a very expensive way to make a bad deal feel good for 24 months. Which one you get depends entirely on whose money is paying for it and how long you actually plan to keep the loan.

Here is everything I explain at the kitchen table, with the real math at today’s rates.

What a mortgage rate buydown actually is

A buydown is prepaid interest. That’s it. Somebody hands the lender a lump sum of money at closing, and in exchange the lender charges you a lower interest rate — either for the first couple of years (a temporary buydown) or for the full life of the loan (a permanent buydown, bought with discount points).

The two work very differently:

• Temporary buydown (2-1, 3-2-1, 1-0): Your note rate never changes. The money sits in an escrowed subsidy account and each month the servicer pulls from it to cover the gap between your reduced payment and the real payment. When the account runs dry, your payment steps up to the note rate and stays there.
• Permanent buydown (discount points): You pay a fee at closing and the note rate itself is lower for all 360 payments. One point equals 1% of the loan amount and typically buys about 0.25% of rate, though 2026 rate sheets range from roughly 0.125% to 0.375% per point depending on loan type, credit tier and LTV (Real Cost Report).

For reference, Freddie Mac’s Primary Mortgage Market Survey put the 30-year fixed at 6.76% for the week ending September 10, 2026, up from 6.71% the week before (Freddie Mac PMMS). Every number below uses 6.76% as the note rate so you can compare apples to apples.

The 2-1 buydown, with real numbers

Let’s use a purchase most of my clients would recognize: a $500,000 home with 5% down, so a $475,000 loan at 6.76% on a 30-year fixed. Principal and interest at the note rate is $3,084/month. (Taxes, insurance and HOA are on top of that — see the hidden costs of buying a home in Arizona for the rest of the payment.)

A 2-1 buydown means year one is priced as if your rate were 2% lower (4.76%) and year two as if it were 1% lower (5.76%). A 3-2-1 adds a third step at 3% lower (3.76%) in year one.

Year	2-1 buydown	3-2-1 buydown	No buydown
Year 1	4.76% — $2,481/mo	3.76% — $2,203/mo	6.76% — $3,084/mo
Year 2	5.76% — $2,775/mo	4.76% — $2,481/mo	6.76% — $3,084/mo
Year 3	6.76% — $3,084/mo	5.76% — $2,775/mo	6.76% — $3,084/mo
Year 4+	6.76% — $3,084/mo	6.76% — $3,084/mo	6.76% — $3,084/mo
Total subsidy cost	$10,948 (2.3 points)	$21,526 (4.5 points)	$0

Two things jump out of that table if you look at it honestly.

First, the cost of a temporary buydown equals the savings, to the penny. There is no discount and no magic. The $10,948 the seller writes into escrow is exactly the $10,948 you don’t pay in months 1–24. Anyone who describes a 2-1 as “getting a 4.76% rate” is describing an escrow account, not a mortgage.

Second, a 3-2-1 is roughly twice the money for a third year of relief — and on this loan it’s 4.5 points, which blows past the 3% seller-concession cap a conventional buyer with less than 10% down is allowed to receive. That’s why you see far more 2-1s than 3-2-1s actually close in Maricopa County.

Who pays for it — and what the caps are

This is the part that decides whether a buydown is smart or silly. There are three funding sources:

• Seller-paid. The best version. It comes out of a concession you negotiated, so it’s the seller’s money creating your lower payment. This is what I push for on resale homes where the seller has been sitting for 60+ days.
• Builder-paid. Common and aggressive in our new-build market right now — often as a permanent buydown through the builder’s affiliated lender rather than a temporary one.
• Buyer-paid. Rarely worth it for a temporary buydown. If it’s your own cash, you’re just prepaying your own payments and giving up the down payment or reserves you could have used instead. For a permanent buydown it can pencil — more on the break-even below.

Whoever funds it, the money is capped by the interested-party contribution rules on your loan program, and buydown dollars share that cap with your other closing costs:

Loan type	Max seller/interested-party contribution	What it means for a buydown
Conventional, primary home, <10% down	3% of price	$15,000 on a $500K home — a 2-1 ($10,948) fits, a 3-2-1 does not
Conventional, primary home, 10%–24.99% down	6% of price	Plenty of room for a 2-1 plus closing costs
Conventional, primary home, 25%+ down	9% of price	Rarely a binding constraint
Conventional investment property	2% of price	Usually too tight for a meaningful buydown
FHA	6% of price	Buydown, closing costs and prepaids all share the 6%
VA	4% of value/price for concessions	Ordinary closing costs sit outside the 4%; buydown funds count toward it
USDA	6% of price	Same shared-bucket logic as FHA

How the escrowed subsidy actually works

The mechanics matter, because they create most of the surprises.

• The full buydown amount is funded at closing and shows up on the Closing Disclosure as a lump sum. It is not a monthly promise from the seller — if the seller can’t fund it, there’s no buydown.
• You are qualified at the note rate (6.76% in our example), not the teaser rate. Fannie Mae and Freddie Mac require it. So a buydown does not help you get approved for more house — it only helps cash flow.
• Your amortization never changes. Principal is paid down exactly as if you were making the full payment, because the subsidy account is making up the difference. You do not fall behind on equity.
• If you sell or refinance before the subsidy is used up, the unused balance doesn’t vanish. It’s typically applied to your payoff, which means you effectively got a discount on the loan. Get that confirmed in writing from your lender before you sign — servicing handling varies.
• Temporary buydown funds are generally not tax-deductible to you when someone else paid them, and seller-paid points on a purchase have their own IRS treatment. Ask your CPA; I’m not one.

Permanent buydowns: the break-even math

Discount points are the other half of this conversation, and the math is much simpler: divide the cost by the monthly savings and you get your break-even in months.

Points paid	Cost on a $475K loan	Rate	P&I	Monthly savings	Break-even
0	$0	6.76%	$3,084	—	—
1	$4,750	6.51%	$3,005	$79	~61 months
2	$9,500	6.26%	$2,928	$156	~61 months
3	$14,250	6.01%	$2,851	$233	~61 months

Notice the break-even is about five years no matter how many points you buy, and that’s before you account for the fact that you could have invested the cash. My rule of thumb: if there’s a real chance you refinance or sell inside five years, buyer-paid points are a bad bet. If it’s the seller’s or builder’s money, points are almost always the better use of the concession than a temporary buydown, because the savings never expire.

Buydown vs. price reduction: which should you ask for?

This is the question I get asked least and should be asked most. Say you’ve negotiated roughly $15,000 of seller help on that $500,000 home. You can take it as a price cut or as a buydown. Here’s what each does:

Option	Cost to seller	Your payment, years 1–2	Your payment, year 3+	Best when
Nothing	$0	$3,084	$3,084	You have leverage elsewhere
2-1 temporary buydown	$10,948	$2,481 / $2,775	$3,084	Income is rising, or you expect to refi soon
$15,000 price reduction	$15,000	$2,991	$2,991	You’re staying long-term (also lowers your tax basis and down payment)
$14,250 as 3 permanent points	$14,250	$2,851	$2,851	You’re keeping this loan 5+ years

The pattern is consistent: a temporary buydown wins on early cash flow, a permanent buydown or price cut wins on total cost. A price reduction also lowers your property tax basis and your down payment requirement, and it doesn’t disappear if you sell in year two. What it doesn’t do is move your monthly payment much — $15,000 off the price on this loan is worth $93/month. The same $15,000 as a 2-1 is worth $603/month in year one. That gap is exactly why sellers and builders love buydowns: they’re the cheapest way to move a payment number in an ad.

Builder buydowns in the Phoenix market — and the traps

Our new-construction market is where the biggest buydown money is right now. Builders would rather pay a lender than cut a base price, because a price cut resets comps for every home left in the community. Tri Pointe, for example, has been advertising Phoenix-metro permanent buydowns to rates in the high-4s with roughly $20,000–$30,000 in builder-paid points and fees (Tri Pointe Homes promotion disclosures). That is real money, and often better than anything a resale seller will do.

Things to check before you get excited:

• The incentive usually requires the builder’s affiliated lender. Get a competing quote anyway. Sometimes an outside lender at a market rate with a $20,000 price concession beats the in-house 4.99%. Sometimes it doesn’t. You won’t know without the second Loan Estimate.
• Is it permanent or temporary? The flyer rate is sometimes a 2-1 step rate. Ask for the note rate in writing.
• Is the base price inflated to fund it? Compare against recent closings in the same community, not the builder’s list sheet. If you’re buying at $30,000 over what the same floor plan closed for last quarter, you paid for your own buydown and you’ll feel it at resale.
• Extended lock and rate-cap terms. On a build 6–9 months out, ask who eats the cost if rates move and whether the incentive survives a closing delay.
• The upgrade trade-off. Builders often make you choose between rate incentive and design-center dollars. Run both.

If you’re comparing a builder deal to an existing home, I walk through the whole trade-off in buying a new construction home in Phoenix and new construction vs. resale.

When a buydown is the right call — and when it isn’t

Where I say yes:

• Someone else’s money is paying, and you’d otherwise leave the concession on the table.
• Your income is genuinely stepping up — a resident finishing training, a spouse returning to work, commission ramping.
• You’re carrying a temporary expense (daycare, a lease overlap, a rental you’re covering while it sells) that ends inside two years.
• You have real reserves, so the year-three step-up is an annoyance and not an emergency.

Where I say no, or at least slow down:

• The buydown is the only reason the payment works. If you can’t comfortably make the year-three payment today, the house is too expensive today. I’ve watched this movie before and it does not end with a refinance that shows up right on schedule.
• You’re paying for it out of your own cash while also going in with minimum down and no reserves.
• You’re an investor underwriting the deal on year-one cash flow. Underwrite it at the note rate or don’t buy it.
• The concession could have gone to a repair credit on a house with a 20-year-old roof and an original HVAC. See what a home inspection in Arizona actually turns up.

How I’d negotiate this in today’s Valley market

Right now we have more inventory and softer pending-sale numbers than a year ago, which means concessions are on the table on a lot of resale listings — especially anything that’s been active 45+ days. My playbook:

• Ask for a dollar amount, not a product. “Seller to contribute $15,000 toward buyer’s closing costs, prepaids and rate buydown at buyer’s election.” That keeps your options open through underwriting.
• Price it before you write. I have my lender quote a 2-1, a 1-0, and 2 permanent points on the same loan amount so we know which use of the concession produces the best result for that specific buyer.
• Watch the appraisal. Concessions don’t hurt you, but an inflated price to fund them can. If the deal only works because we papered the price up, the appraisal usually finds it.
• Check the cap first. Nothing worse than negotiating 5% in concessions on a conventional loan with 5% down and finding out 3% is the ceiling.

And if the underlying question is really “should I be buying at all right now,” that’s a different conversation — I laid out my honest take in is 2026 a good time to buy a home in Phoenix, and first-time buyers should also read Arizona down payment assistance programs and VA and FHA loans in Arizona before locking anything.

The bottom line

A buydown doesn’t create money. It moves money around in time. Used well — funded by a motivated seller or a builder with inventory, on a house you could afford at the note rate anyway — it’s free breathing room and I’ll fight for it in every negotiation. Used badly, it’s a two-year runway to a payment you already couldn’t afford.

Ask one question before you sign anything: can I make the year-three payment today? If yes, take the buydown. If no, we need to look at a different house.

Want the math run on your actual numbers?

Because I’m licensed on both the real estate and mortgage side, I can price a 2-1, a 3-2-1 and permanent points against a straight price reduction on your specific purchase — before you write the offer, not after. No cost, no obligation. Reach out here and tell me the price range you’re looking at and how long you plan to stay, and I’ll send you the side-by-side.

Frequently asked questions about mortgage rate buydowns in Arizona