What is a 2-1 buydown and how does it work?
Last updated September 1, 2026
A 2-1 buydown lowers your mortgage payment for the first two years of the loan. In year one you pay as if the rate were 2 percentage points lower. In year two, 1 point lower. From year three on you pay the full note rate, forever. The discount is paid for up front, usually by the seller, with money that sits in an escrow account and covers the gap each month. Your actual rate never changes. Only the check you write does.
That last part is the piece most people miss. A 2-1 buydown is not a lower interest rate. It is a prepaid subsidy of your first 24 payments. Hold that frame and every question below answers itself.
How does a 2-1 buydown work?
Say your loan closes at a 6.5 percent note rate. That number is illustrative, and every figure on this page is. Your quoted rate will be its own number. The mechanics do not change.
You pay as if the rate were 4.5 percent. The subsidy account pays the difference to the servicer every month.
You pay as if the rate were 5.5 percent. The account keeps covering the smaller gap.
You pay the full 6.5 percent payment. The account is empty and the training wheels are off.
The whole cost of the buydown is deposited at closing into a custodial account. It is a written agreement between you and whoever funds it, disclosed to the lender and the appraiser. The servicer draws from the account each month. You never touch the money and you never see it, except as a smaller payment.
The loan underneath is a normal fixed rate mortgage. Your note rate, your loan balance, and your amortization schedule are all built on the full rate from day one. If a lender ever pitches you a buydown as a rate, ask them to show you the note.
What does a 2-1 buydown cost? Run the arithmetic.
Take an illustrative $800,000 loan, 30 year fixed, at a 6.5 percent note rate. Principal and interest at the full rate is about $5,057 a month.
Add up the 24 subsidized months and the buydown costs about $18,200 on this loan. That is the check the seller, the builder, or the lender writes at closing. The cost is always this same arithmetic: twelve months of the year one gap plus twelve months of the year two gap.
Notice the shape of the deal. The savings are front loaded and they end. Your budget has to work at $5,057, because that is the payment for the next 28 years. Run your own loan size and rate through the payments calculator and look at the full payment, not the year one payment.
Who pays for the buydown?
Almost always the seller or a builder, as a negotiated credit in the purchase contract. It comes out of their proceeds at closing the same way any other credit does. Lenders fund them sometimes as a promotion. A buyer can fund their own, but a buyer with cash to spend should usually price permanent discount points first, for reasons in the next section.
Seller funded buydowns count as an interested party contribution, and loan programs cap how much a seller can contribute toward your costs. The cap depends on your program and down payment. Your lender will know your limit. Ask before you write the credit into an offer.
One practical note from our side of the table. In a slow week, a seller who will not cut the price by $20,000 will often agree to an $18,000 buydown credit, because the list price stays intact in the record. The seller protects the comp. You get the subsidy. That trade is real and it is worth asking for.
Do you qualify at the lower rate?
No. This is the guardrail, and it is a good one. On conventional loans, Fannie Mae's selling guide requires the lender to qualify you at the full note rate, ignoring the buydown. Your income has to support the year three payment on day one.
So a 2-1 buydown cannot stretch your approval. It will not buy you a bigger house. What it buys is breathing room, two years of smaller payments while you absorb the other costs of a new house. If someone is selling you the buydown as a way to afford a payment you otherwise could not, walk. The full payment is coming, and the underwriter already decided you can carry it. Make sure you agree with the underwriter. Start with how much house you can actually afford.
Buydown vs price cut vs permanent points: which wins?
Same illustrative loan. Suppose you can get about $18,200 of value out of the seller. You have three ways to take it.
You save $1,003 a month in year one and $514 a month in year two. Then zero. Total saved: about $18,200, all of it in the first two years.
An $18,200 price reduction with 20 percent down shrinks the loan by about $14,600. Payment drops by roughly $92 a month, every month, for 30 years. It also lowers your property tax base a little, since tax follows price.
The seller credit buys down the note rate itself, for good. How far $18,200 moves the rate depends on that week's pricing, so get the quote in writing. The saving is smaller per month than a 2-1 buydown's first year, but it never expires.
The honest decision rule. The 2-1 buydown wins when your cash flow is tight early and you expect it to improve, or when you genuinely may not hold the loan long. The permanent option, points or price, wins when you plan to stay put and hold the loan for years, because permanent savings compound and temporary ones stop. If you are choosing between buying now with a buydown or waiting for rates to move, read should I buy a house now or wait first. A buydown is a cash flow tool. It is not a market timing tool.
One honest limitation. The comparison above depends on point pricing, and point pricing changes daily and differs by lender. We cannot tell you what a point buys this week, and neither can any article. Ask your lender to price all three versions of the same credit on the same day, on one sheet of paper.
What happens to the buydown money if you refinance or sell?
The funds sit in a custodial account, so they do not vanish into the lender's pocket by default. Under standard servicing rules, when a loan with buydown funds is paid off early, the servicer credits the remaining funds against your payoff amount, unless the buydown agreement says the party who funded it gets the remainder back.
That clause is the one to read before closing. Seller funded agreements commonly credit leftover funds to you at payoff. Some lender funded agreements let the lender recoup them. Ask your escrow officer or lender to show you the paragraph, and know the answer before you sign, not when the payoff demand arrives.
And a warning about the refinance plan itself. A 2-1 buydown is often sold with the line that you will refinance before year three arrives. Maybe. Rates do not owe you a refinance. If the full note rate payment would break your budget in year three, the buydown did not fix that problem, it postponed it. Buy the house whose full payment you can carry, then treat any refinance as a bonus.
Mechanics here follow the Fannie Mae Selling Guide section on temporary interest rate buydowns (B2-1.4-04) and its servicing rules for buydown funds at payoff: qualification at the note rate, funds fully deposited in a custodial account at closing, and remaining funds credited at payoff or handled per the buydown agreement. Program rules change, and FHA, VA, and jumbo programs have their own versions. Confirm your program's terms with your lender.
When is a 2-1 buydown a bad idea?
- When it is priced into the house. A buydown funded by a seller who padded the price is you financing your own subsidy, plus interest, for 30 years. Check the comps before you agree on price and credit together.
- When year three does not fit the budget. The qualification rule protects the lender. Protect yourself too. If the full payment only works on paper, it does not work.
- When you would stay long and could take points instead. Two years of subsidy is worth less than a permanently lower rate if you hold the loan for a decade.
- When the seller would simply cut the price. A price cut lowers your loan, your property tax base, and your transfer tax basis. If both options are truly on the table at equal cost, the price cut is the cleaner win for a long stay.
Four free tools, no sign-up. See what you can afford at the full note rate with Purchase Power. Compare payment scenarios side by side in the payments calculator. Get every dollar it takes to close in the buyer net sheet. When you are ready to look, get listing matches sent as they hit the market.
This is not lending advice, and the numbers on this page are illustrative arithmetic, not quotes. Loan programs, contribution caps, and point pricing change. Your own figures come from your lender's Loan Estimate and your buydown agreement. Read both before you commit.
What is a 2-1 buydown on a mortgage?
A 2-1 buydown is a temporary payment reduction on a fixed rate loan. In year one you pay as if your rate were 2 percentage points below the note rate. In year two you pay as if it were 1 point below. From year three on you pay the full note rate for the life of the loan. The note rate itself never changes. A lump sum, deposited at closing, covers the difference during the first two years.
Do you qualify for the loan at the lower buydown rate?
No. On conventional loans the lender qualifies you at the full note rate, not the reduced first year rate. Fannie Mae's selling guide requires it. The buydown lowers what you pay for two years. It does not lower the income you need to get approved, and it should not stretch you into a house you cannot carry at the full payment.
Who pays for a 2-1 buydown?
Usually the seller or a builder, as a credit negotiated in the purchase contract. A lender can fund one, and a buyer can pay for their own, though at that point permanent discount points usually deserve a look first. Whoever pays, the full amount is deposited up front into a custodial account at closing, and the servicer draws from it each month during the first two years.
What happens to buydown funds if you refinance or sell early?
The money is not lost by default. Under standard servicing rules, remaining buydown funds are credited against your payoff when the loan is paid in full, unless your buydown agreement says the party who funded it gets the remainder back. Read the agreement before you sign, and ask your lender to point to the clause that says where leftover funds go.
Summary points
- A 2-1 buydown lowers your payment as if the rate were 2 points lower in year one and 1 point lower in year two. From year three on you pay the full note rate.
- The note rate never changes. A buydown is a prepaid subsidy of your first 24 payments, funded up front into an escrow account, usually by the seller.
- On an illustrative $800,000 loan at 6.5 percent, a 2-1 buydown saves about $1,003 a month in year one and $514 a month in year two, and costs about $18,200 up front.
- Lenders qualify you at the full note rate on conventional loans, so a buydown cannot stretch your approval and should never stretch your budget.
- If you pay the loan off early, remaining buydown funds are credited against your payoff unless the buydown agreement sends them back to whoever funded it. Read that clause before closing.
- A buydown wins for short holds and tight early cash flow. Permanent points or a price cut win for long stays, because permanent savings never expire.
- Never count on a refinance to rescue year three. Buy the house whose full payment you can carry.