What is a 2-1 buydown and is it worth it?
In this article
"A 2-1 buydown lowers your mortgage rate by 2 percentage points in year one and 1 point in year two. In year three, your rate goes back to the full rate on your loan note and stays there. Someone pays for those early savings up front, often the builder or seller, and it can be worth it if you want smaller payments at first and can comfortably afford the full payment later.
What is a 2-1 buydown?
A 2-1 buydown is a temporary rate cut. Your loan still has one real interest rate, called the note rate. For the first two years, money set aside at closing covers part of each monthly payment, so you pay as if your rate were lower.
The ""2-1"" name tells you the steps. You pay 2 points below the note rate in year one. You pay 1 point below it in year two. From year three on, you pay the full note rate for the rest of the loan.
Fannie Mae's Selling Guide (section B2-1.4-04, checked Sept. 24, 2026) sets the ground rules for temporary buydowns on the loans it buys. The buydown period can be no longer than 3 years. The rate you pay can rise by no more than 1% in each one-year step. The rate cut can be no more than 3% in total. A 2-1 buydown fits inside all of those limits.
The same Fannie Mae section also says the buydown must be a written agreement, and the mortgage papers must show the permanent terms, not the buydown terms. In plain words: the loan itself never changes. Only who pays part of the payment changes, and only for two years.
How much does a 2-1 buydown save at today's rates?
Here is where the math matters. The 30-year fixed rate averaged 7.03% in Freddie Mac's Primary Mortgage Market Survey as of Sept. 24, 2026. That was up from 6.95% the week before. A year earlier, Freddie Mac reported an average of 6.30%.
The table below uses Freddie Mac's 7.03% survey average as the note rate. Your own rate will depend on your credit, your down payment, the loan type and the lender.
EXAMPLE ONLY: $400,000 loan, 30-year fixed, note rate 7.03% (Freddie Mac PMMS average as of Sept. 24, 2026). Principal and interest only. Taxes, insurance and mortgage insurance are not included.
Loan year | Rate you pay | Monthly principal and interest | Monthly savings vs. full rate |
|---|---|---|---|
Year 1 | 5.03% | $2,154.63 | $514.64 |
Year 2 | 6.03% | $2,405.92 | $263.35 |
Years 3 to 30 | 7.03% | $2,669.27 | $0 |
In this example, you save $514.64 a month in year one and $263.35 a month in year two. That adds up to $6,175.68 in year one and $3,160.20 in year two. So the buydown in this example costs about $9,335.88, and that money has to be paid into the buydown account at closing.
Who pays for a 2-1 buydown?
A buydown can be paid for by the seller, the builder, the lender, or you. On new construction, builders often offer to pay for it as an incentive. Offers change often, so call 561-704-0091 for today's numbers.
When a builder or seller pays, Fannie Mae calls that money an interested party contribution. Fannie Mae's Selling Guide (section B3-4.1-02, checked Sept. 24, 2026) caps these contributions for a principal residence at 3% of the price or appraised value (whichever is lower) when your loan-to-value is above 90%. The cap is 6% when your loan-to-value is 75.01% to 90%, and 9% when it is 75% or less.
Why this matters: the buydown money and any help with closing costs may come out of the same limited pot. If you want both, ask your lender to show you how the numbers fit under the cap before you sign.
What happens in year 3 of a 2-1 buydown?
In year three, the buydown money is used up. Your payment rises to the full note-rate payment and stays there for the rest of the loan. In the example above, that means $2,669.27 a month in principal and interest, starting in year three.
This is the part people forget. The jump from year two to year three in the example is $263.35 a month. The jump from year one to year three is $514.64 a month. Plan for the year-three payment from day one.
Some buyers hope to refinance before year three. That can happen if rates fall, but nobody can promise where rates will go. Treat a refinance as a bonus, not a plan.
Do you qualify at the lower rate or the full rate?
For loans sold to Fannie Mae, you qualify at the full rate. Fannie Mae's Selling Guide (section B2-1.4-04, checked Sept. 24, 2026) says the lender must qualify the borrower ""based on the note rate without consideration of the bought-down rate.""
That is good protection. It means a lender has to check that you can handle the full payment, not just the year-one payment. It also means a 2-1 buydown does not help you qualify for a bigger loan.
The same section says your obligation to make the payments stays in place even if the buydown funds are not available for any reason. And it allows the agreement to return unused buydown money if you pay off the loan early. Ask your lender where unused funds go before closing.
Is a 2-1 buydown worth it?
A 2-1 buydown is worth it when three things are true:
Someone else is paying for it, or the price is fair. A builder-paid buydown is money you do not have to bring yourself.
You can afford the full payment today. Since you qualify at the note rate, the lender will check this too. Make sure your own budget agrees.
You have a use for the early savings. New homeowners often need cash for window coverings, furniture, a fence or simply a bigger emergency fund.
It may not be the best fit if the same builder money could buy you something that lasts longer. A permanent rate reduction or help with closing costs are common alternatives. Ask for each option in writing and compare the total cost over the years you expect to keep the loan.
What should you ask before you accept a 2-1 buydown?
What is my note rate, and what are my payments in years one, two and three?
Who is paying for the buydown, and how much is going into the account?
Does the buydown use up part of the interested party contribution cap?
What happens to unused buydown money if I sell or refinance early?
Could the same money lower my rate for the full loan instead?
What this means for new-construction buyers in Southeast Florida
If you are shopping new homes in Palm Beach, Martin, Broward or Miami-Dade counties, you will likely see buydown offers. Builders use them because a lower first-year payment is easy to understand.
Compare offers the same way every time. Look at the year-three payment first, since that is your real long-term cost. Then look at the savings in years one and two. Then check whether the offer affects your closing cost help.
Your property taxes and homeowners insurance also go on top of the principal and interest shown in the table. Get those estimates for the exact home before you decide.
National House Search is builder-neutral. We can help you line up buydown offers from different builders side by side, so you can see which one actually saves you the most.
Common Questions
What does 2-1 mean in a 2-1 buydown?
It means your rate is 2 points below the note rate in year one and 1 point below it in year two. From year three on, you pay the full note rate. The loan itself does not change.
How much does a 2-1 buydown cost?
It costs the total of the payment savings for the two years. On a \$400,000 example loan at the 7.03% Freddie Mac survey average as of Sept. 24, 2026, that is about \$9,335.88. Your real cost depends on your loan amount and rate.
Do I qualify at the lower payment?
Not for loans sold to Fannie Mae. Fannie Mae's Selling Guide, checked Sept. 24, 2026, says lenders must qualify you at the note rate. So you need to afford the full payment from the start.
Can a builder pay for my 2-1 buydown?
Yes, builders often do. Fannie Mae counts that money as an interested party contribution, which has limits based on your loan-to-value. Call 561-704-0091 for today's builder offers.
What happens if I refinance or sell during the buydown?
Fannie Mae's Selling Guide allows the buydown agreement to return unused funds if the loan is paid off early. Where that money goes depends on your agreement. Ask your lender before closing.
Is a 2-1 buydown the same as buying points?
No. A 2-1 buydown lowers your payment for two years only. Buying points lowers your rate for the whole loan. Ask for both options in writing and compare them.
Ready to take the next step?
Call 561-704-0091 to talk with a National House Search specialist, or Schedule a visit.
Related reading: Lakeside Landing new homes · Buying a new-construction townhome for the first time · Condo vs. townhouse vs. single-family home
This is general information, not financial, tax or legal advice. Figures checked September 24, 2026."