2-1 Buydown: How It Works, Cost & Who Pays (+3-2-1)

Quick answer: A 2-1 buydown is a temporary rate reduction. Your rate is 2 percentage 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 for the rest of the loan. The lower payments are prepaid at closing, usually by the seller or builder, and the money sits in an escrow-type account that covers the difference each month. You still have to qualify at the full note rate.

How a 2-1 buydown works

A buydown doesn't change your mortgage note. Your loan documents show the permanent rate, which is called the note rate. Separately, someone deposits enough money at closing to cover part of your monthly interest for the first two years:

Year 1: You pay as if your rate were 2% lower than the note rate.
Year 2: You pay as if your rate were 1% lower than the note rate.
Year 3 onward: You pay the full note rate.

Each month, the servicer combines your reduced payment with money from the buydown account to make the full payment. Once that account is used up at the end of year two, your payment goes to its permanent amount.

2-1 buydown example

Here's a hypothetical example: a $400,000 fixed-rate loan with a 7.00% note rate. This is an illustration, not a quote.

Period	Effective rate you pay
Year 1	5.00%
Year 2	6.00%
Year 3 onward	7.00% (the full note rate)

Approximate cost of the buydown: about $9,323, which is the total principal-and-interest difference between the note rate and the reduced rates over the first two years. This amount gets deposited at closing. Taxes, insurance, and any mortgage insurance aren't part of the buydown.

If the home cost $500,000, this buydown equals about 1.9% of the purchase price. That's why it's a common thing to negotiate instead of a price reduction.

Who pays for a 2-1 buydown?

The funds can come from:

The seller, as a seller concession negotiated in the purchase contract. This is the most common setup.
A builder, often as a new-construction incentive.
The lender, sometimes in exchange for a higher note rate or as a promotion.
The buyer, though paying for your own temporary buydown rarely makes sense compared with other options.

When the seller, builder, real estate agent, or another "interested party" pays, the money counts toward the loan program's interested party contribution (IPC) limits. For a conventional loan sold to Fannie Mae, those limits are:

Occupancy	LTV/CLTV	Maximum interested party contribution
Principal residence or second home	Over 90%	3%
Principal residence or second home	75.01%–90%	6%
Principal residence or second home	75% or less	9%
Investment property	All	2%

The percentage is based on the lower of the sales price or appraised value. All seller-paid costs count toward it, so if the seller is also covering some of your closing costs, the buydown has to fit under the same cap.

Fannie Mae rules for temporary buydowns

For conventional loans sold to Fannie Mae, the Selling Guide (B2-1.4-04) sets the main rules:

Eligible: fixed-rate loans and certain ARMs on a principal residence or second home.
Not eligible: investment properties and cash-out refinances.
Limits: The reduction can't exceed 3%, the rate can't go up more than 1% per year, and the buydown period can't be longer than 3 years. A 2-1 fits within those limits, and so does a 3-2-1.
Qualifying: The lender must qualify you at the note rate, not the bought-down rate.
Funds: They're held in a custodial account and can't be used to cover past-due payments or to reduce the loan amount when calculating LTV.
Written agreement: The buydown agreement must say you are still responsible for the full note payment if, for any reason, the buydown funds aren't available.

FHA and VA loans also allow temporary buydowns, with their own rules. On VA loans, temporary buydowns can be used on fixed-rate loans, including purchases, cash-out refinances, and IRRRLs. You must qualify at the full payment after the buydown ends, and the funds must be held in a separate escrow account. A seller- or builder-paid buydown counts as a seller concession, and VA caps those at 4% of the reasonable value. If you're using a government loan, ask us which rules apply to your file.

What about a 3-2-1 buydown?

A 3-2-1 buydown works the same way over three years: 3 points below the note rate in year one, 2 points below in year two, and 1 point below in year three. It costs more up front because the subsidy is larger and lasts longer, so it uses more of the seller's concession. Fannie Mae classifies a reduction of more than 2 points, or a buydown period longer than two years, as a "significant" buydown, and lenders may have extra overlays for it. For most buyers, the 2-1 is the more common choice.

What happens if you refinance or sell during the buydown?

Under Fannie Mae's guide, if the loan is paid off before the buydown funds are used up, the leftover money is credited toward your payoff, or it's returned to you or the lender as the buydown agreement specifies. If a buyer assumes the loan, the remaining funds can keep reducing payments under the original plan. Read your buydown agreement so you know which applies to you.

So you don't "lose" the unused subsidy if rates drop and you refinance in year one. That's one reason buyers like 2-1 buydowns.

2-1 buydown vs. permanent buydown vs. price reduction

If a seller offers you a set amount, say $9,000, you have a few ways to use it:

Option	What you get	Best if…
2-1 temporary buydown	Lower payments for 2 years, then the full note rate	You expect your income to rise or think you may refinance
Permanent buydown (discount points)	A lower rate for the life of the loan	You plan to keep the loan for many years
Price reduction	A slightly smaller loan amount	You want a lower loan balance and LTV from day one
Closing cost credit	Less cash needed at closing	Cash to close is your biggest hurdle

Which one is best depends on your plans, the price of points that day, and how long you'll keep the loan. We can run all four side by side for your scenario. Learn more about permanent buydowns.

Pros and cons of a 2-1 buydown

Pros

Much lower payments for the first two years, when move-in costs are highest
Usually funded with the seller's money, not yours
Unused funds are credited back if you refinance or sell early (per the buydown agreement)
Gives you time for raises or other income growth

Cons

You must qualify at the full note rate, so it doesn't increase how much you can borrow
The payment increase in years two and three is real, and you need to budget for it
Seller money spent on a buydown can't go toward closing costs or a lower price
Not available on investment properties or cash-out refinances (Fannie Mae)

Frequently asked questions

What does a 2-1 buydown mean?

It means your interest rate is temporarily 2 percentage points below the note rate in year one and 1 point below it in year two. In year three, it goes to the full note rate. The difference is prepaid at closing, usually by the seller or builder.

Do you qualify at the note rate or the bought-down rate?

For conventional loans sold to Fannie Mae, the lender must qualify you at the note rate, not the reduced rate. VA also requires qualifying at the full post-buydown payment. A 2-1 buydown lowers your early payments but doesn't increase how much you can borrow.

How much does a 2-1 buydown cost?

It costs the total of the monthly payment differences for the two years. In our hypothetical $400,000 example at a 7.00% note rate, the cost is about $9,323. The actual cost depends on your loan amount and rate.

Can the seller pay for a 2-1 buydown?

Yes. A seller-paid buydown is the most common setup. It counts toward the interested party contribution limits. For a Fannie Mae principal residence loan, those limits are 3%, 6%, or 9% of the price or appraised value (whichever is lower), depending on your LTV.

What happens to the buydown money if I refinance?

Under Fannie Mae's guide, unused buydown funds are credited toward the payoff, or they're returned to the borrower or lender as the buydown agreement specifies. You don't automatically lose them.

See if a 2-1 buydown fits your purchase

Negotiating seller concessions? Before you sign the contract, we'll compare a 2-1 buydown, points, and a closing cost credit for your exact numbers. Buydowns depend on what the seller agrees to and on your loan program's limits. MortgageCS is a mortgage broker and does not make credit decisions. Each loan is subject to the lender's underwriting guidelines, property eligibility and borrower qualification, and not all applicants will qualify. Loan terms and availability are set by the lender and may change.

Schedule a quick call with our team, or call or text (215) 987-2602.

What Is a 2-1 Buydown? How It Works, What It Costs, and Who Pays