Rates & Market

2-1 Buydown Explained: How It Works, Who Pays and When It Pays Off

Two cheaper years, then the full rate: the 2-1 buydown is like an intro offer for your mortgage. Here is the real math and the fine print.

By Shivam Kaushik · Updated October 31, 2026 · 6 min read

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Quick answers

What is it? A 2-1 buydown lowers your rate by 2 points in year one and 1 point in year two. From year three on, you pay the full note rate.
Who pays for it? Someone prepays the difference into an account at closing. Often that’s the seller or builder, sometimes the lender or you.
Do I qualify at the low rate? No. For Fannie Mae loans, you must qualify at the full note rate.
Is it the same as buying points? No. Points lower your rate for the life of the loan. A 2-1 buydown is temporary.

Imagine a gym that gives you two cheap months before the full membership kicks in. That is a 2-1 buydown in a nutshell, except instead of a gym it’s a mortgage, and instead of two months it’s two years.

With 30-year rates averaging 7.24% for the week of October 29, 2026 (per Freddie Mac), a lot of buyers and sellers are talking about buydowns. Let’s look at how they work, who pays, and when they’re a smart move or just a nice-looking sticker.

How a 2-1 buydown works

Your loan has a note rate: the real, permanent rate written in your loan documents. A 2-1 buydown doesn’t change that rate. It just reduces what you pay for the first two years:

Year 1: note rate minus 2%
Year 2: note rate minus 1%
Years 3–30: full note rate

The gap between the reduced payment and the full payment has to come from somewhere. It’s paid upfront, at closing, into a buydown account. Each month the servicer pulls from that account to cover the difference. You see a smaller bill; the lender still gets the full payment.

There’s also a 3-2-1 version (three years of steps) and a 1-0 version (one year). Fannie Mae’s Selling Guide caps temporary buydowns at three years, with the rate rising no more than 1% each year.

Worked example: the real numbers

Example

You borrow $400,000 on a 30-year fixed at a note rate of 7.24%. Here’s what a 2-1 buydown does:

Period	Rate you pay	Monthly P&I	Monthly savings
Year 1	5.24%	$2,206.34	$519.65
Year 2	6.24%	$2,460.27	$265.72
Years 3–30	7.24%	$2,725.99	$0

Total subsidy: ($519.65 × 12) + ($265.72 × 12) = $9,424.55. That’s about 2.36% of the loan amount, and that’s what someone has to put into the buydown account at closing.

Want to play with your own numbers? Use the mortgage calculator at the full rate and at the reduced rates, and compare.

Temporary vs permanent buydown

A permanent buydown means paying discount points to lower your note rate for the whole loan. A temporary buydown is a two- or three-year discount.

	2-1 temporary buydown	Permanent buydown (points)
Rate change	Lower for 2 years, then full rate	Lower for the life of the loan
Note rate	Unchanged	Reduced
Best if you…	Expect income to grow soon, or plan to refinance	Plan to keep the loan a long time
Qualifying	At the full note rate (Fannie Mae)	At the new lower rate
Cost	Equal to the payment subsidy	Set by the lender’s pricing; varies

Fair warning: the same dollars spent on points might buy a different (permanent) rate cut depending on the lender’s pricing. Ask for both quotes on a Loan Estimate before you decide.

Myth buster“A buydown lets me afford a bigger house.” Not for qualifying. Fannie Mae requires lenders to qualify you at the full note rate, not the year-one teaser rate. If you can’t handle the year-three payment, the buydown just delays the stress.

Who pays for the buydown?

Anyone can fund it, within the rules:

The seller: very common when homes sit on the market. Instead of cutting the price, the seller pays for your buydown.
A builder: new-construction builders often advertise buydowns as a sales incentive.
The lender: sometimes funded through pricing or promotions.
You: allowed, but think hard. Paying your own temporary discount is mostly just prepaying your own interest.

When a seller or builder pays, it’s an interested party contribution (IPC), and that comes with limits.

Seller concession limits in general

Each loan program caps how much the seller and other interested parties can chip in. For conventional loans, Fannie Mae’s limits (as a share of price or appraised value, whichever is lower) are:

Occupancy	LTV/CLTV	Max interested party contributions
Primary home or second home	Over 90%	3%
Primary home or second home	75.01%–90%	6%
Primary home or second home	75% or less	9%
Investment property	Any	2%

FHA and VA loans have their own concession limits and rules about what counts toward them, so ask your loan officer how a buydown fits. See our guides on FHA loans and conventional loans.

In our example, a $9,424.55 buydown on a $500,000 purchase with 20% down (80% LTV) is about 1.9% of the price, well inside the 6% limit. With 3% down, though, the cap is 3%, which has to cover the buydown and any closing costs the seller pays.

Fun factFreddie Mac has published its weekly mortgage rate survey (the Primary Mortgage Market Survey) since 1971. That’s the number most news stories quote when they say “rates rose this week.”

When a 2-1 buydown makes sense

The seller is paying. Free money toward your payment is hard to argue with, as long as you aren’t overpaying for the house.
Your income is likely to rise in the next two years (new job, promotion, a partner returning to work).
You expect to refinance. If rates fall and you refinance, Fannie Mae’s guide says leftover buydown funds are generally credited to your payoff, so they aren’t simply lost. Read your buydown agreement. Of course, a rate drop is never guaranteed. Our when to refinance guide covers the math.

When to skip it

If the year-three payment would stretch your budget.
If a simple price cut, or seller-paid closing costs, would save you more over time.
If you’d rather lock in a lower rate for good with points and plan to stay for many years.

Tip: ask the seller for the cash value of the buydown and compare it to a price reduction of the same amount. A lower price also means a smaller loan and less interest for 30 years.

Try it: use our 2-1 buydown calculator to see your payments and the total buydown cost.

FAQ

Can I get a 2-1 buydown on an adjustable-rate mortgage?

Some ARMs allow it, but Fannie Mae restricts which ARM plans qualify. Most buydowns are used with fixed-rate loans. See our ARM guide for how ARMs work.

Can I use a buydown on a cash-out refinance?

Not under Fannie Mae’s rules. Temporary buydowns are not allowed on cash-out refinances or investment properties.

What happens to unused buydown money if I sell?

Under Fannie Mae’s guide, leftover funds are generally applied toward paying off the loan. Your buydown agreement spells out the details.

Does a buydown change my APR?

It can affect how costs show up on your disclosures. Compare full Loan Estimates side by side rather than relying on the teaser rate.

Is a 2-1 buydown worth it if I pay for it myself?

Usually only as a cash-flow tool. You’re mostly prepaying your own interest. Points or a bigger down payment may serve you better.

Sources: Fannie Mae Selling Guide (B2-1.4-04 Temporary Interest Rate Buydowns, B3-4.1-02 Interested Party Contributions), Freddie Mac Primary Mortgage Market Survey, CFPB. This article is general education, not financial, tax or legal advice. Keys & Coffee is not a lender.

Written by

Shivam Kaushik· IMSHIVA

Founder & Director, QuibbleTech Solutions Pvt Ltd · Editor, Keys & Coffee

Shivam Kaushik is the founder of QuibbleTech Solutions Pvt Ltd and the editor of Keys & Coffee. He is not a licensed loan officer or financial adviser. Every guide here is written in plain English and checked against official sources such as the CFPB, HUD, Fannie Mae, Freddie Mac and the Federal Reserve. For advice on your own loan, talk to a licensed lender.

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Keys & Coffee is an independent education site. We are not a lender or mortgage broker, we do not take loan applications or payments, and nothing here is financial advice. This site is not affiliated with Axia Home Loans, Axia Financial, LLC, or Planet Home Lending. Rates and rules change often — always confirm details with a licensed loan officer and check any lender on the NMLS Consumer Access site.