How Does a 2-1 Buydown Work? Rates, Caps, and Eligibility

A 2-1 buydown is a mortgage arrangement where a lump sum paid at closing temporarily lowers your interest rate for the first two years of the loan: two percentage points below the note rate in year one, one point below in year two, then the full note rate from year three through the end of the loan. On a $400,000 loan, the upfront cost typically runs between $8,000 and $12,000, though the exact figure depends on your note rate and balance.

The Rate and Payment Schedule

The schedule is fixed and tied to the permanent rate on your promissory note. With a 7% note rate, the phases look like this:

Year one: your effective rate is 5%.
Year two: your effective rate is 6%.
Year three and after: you pay the full 7% for the remaining 28 years of a 30-year loan.

On a $400,000 loan at that 7% note rate, monthly principal and interest come out to roughly $2,147 in year one, $2,398 in year two, and $2,661 from year three onward. The lender isn’t forgiving the interest gap. Someone pays it upfront, and each month the servicer draws from an escrow account to cover the difference between what you pay and what the lender is owed.¹

Who Pays for the Buydown

The money can come from the seller, a home builder, the lender, or sometimes the buyer directly. In slower markets, sellers and builders often offer a 2-1 buydown as a concession to attract offers without cutting the sale price.¹

Whoever funds it, the full subsidy is deposited into a separate escrow account at closing. That account is protected from creditors of the lender, seller, builder, and buyer. Each month, the servicer pulls from it to cover the gap.²

When the seller, builder, or another interested party pays, the amount counts toward the seller concession cap for your loan type. Those caps matter because a buydown on a $400,000 loan can easily land between $9,000 and $10,000.

Conventional Loan Caps

Fannie Mae ties interested party contribution limits to your loan-to-value ratio and property type:³

Down payment below 10% (LTV above 90%): capped at 3% of sale price or appraised value, whichever is lower.
Down payment of 10% to 25% (LTV of 75.01–90%): capped at 6%.
Down payment above 25% (LTV of 75% or less): capped at 9%.
Investment properties: capped at 2% regardless of LTV.

A 3% cap on a low-down-payment loan can get tight fast, especially if the seller credit also needs to cover other closing costs.

FHA and VA Caps

FHA caps total seller concessions at 6% of sale price or appraised value, whichever is lower, and buydown costs count toward that limit. VA caps seller concessions at 4% of the property’s reasonable value, and buydowns provided by a seller or builder count as concessions.¹

Loan and Property Eligibility

Fannie Mae permits temporary buydowns on all fixed-rate mortgages and on certain adjustable-rate plans, with restrictions on the ARM versions.² FHA allows buydowns only on fixed-rate mortgages; ARMs are excluded.⁴ VA follows a similar structure.

On the property side, Fannie Mae allows 2-1 buydowns on primary residences and second homes. Investment properties are not eligible.² FHA buydowns apply to one-to-four-unit properties where you occupy one of the units.⁴

One rule cuts across all major programs: you have to qualify for the loan at the full note rate, not the discounted year-one or year-two rate. Debt-to-income and ability-to-repay checks are measured against the payment you’ll owe starting in year three.² VA underwriters may treat the buydown as a compensating factor in borderline files, but the baseline calculation still uses the permanent rate.¹

The Payment Jump in Year Three

The main risk of a 2-1 buydown is the payment increase when the subsidy runs out. On that $400,000 loan at 7%, the monthly payment rises from about $2,398 in year two to $2,661 in year three, an increase of roughly $263 a month or about 11%. Measured from the year-one payment of $2,147, the swing is over $500.

Because you qualified at the full note rate, the year-three payment is theoretically within your budget. In practice, two years at lower payments can reshape spending. If your income doesn’t grow the way you expected, or you pick up new debt during the buydown period, the transition can feel steeper than the arithmetic suggests.⁵

If You Sell or Refinance Early

If you sell your home or refinance before the 24 months are up, money will be left in the buydown escrow. Fannie Mae’s guidelines direct that those unused funds be credited toward your payoff balance, reducing what’s needed to close out the loan. The buydown agreement may instead specify that the remainder returns to you or to the lender if the lender funded it.²

If you stay put and make all 24 payments, the escrow account depletes on schedule and there is nothing to refund. The funds aren’t refundable in any other circumstance; your only right to them is having them applied to your payments as they come due.²

2-1 Buydown vs. Discount Points

Both cost money upfront to lower your rate, but they behave differently. Discount points permanently reduce your note rate for the whole loan term. One point typically costs 1% of the loan amount and cuts the rate by roughly 0.25%, though the exact reduction varies by lender and market.

A 2-1 buydown leaves your note rate untouched. It just subsidizes payments during the first two years, and after month 24 you pay whatever rate you would have paid anyway. The tradeoff is fairly simple: discount points deliver smaller savings spread across 15 or 30 years, while a 2-1 buydown delivers larger savings concentrated up front.

Points tend to work better if you plan to hold the loan for many years, because the savings compound. A 2-1 buydown fits better if you expect to refinance within a few years or need breathing room while your income catches up to the new housing cost.

When a 2-1 Buydown Makes Sense

A buydown is not free money. Someone pays thousands of dollars for temporary relief. A few situations tend to make it worthwhile:

The seller or builder is offering it as a concession. If the cost is folded into the deal without raising your out-of-pocket expense, the savings are effectively a gift.
You expect your income to rise. Lower payments in years one and two give you time to grow into the full obligation.
You plan to refinance if rates drop. A buydown keeps payments manageable while you wait, though future rate movements aren’t guaranteed.

It is harder to justify paying for a buydown yourself with no plan to refinance. In that case, the same money often does more work as discount points or a larger down payment. Fannie Mae places no dollar cap on the buydown itself; the practical ceiling is usually the seller concession cap for your loan type.²

Tax Notes

If a seller pays for your buydown, the IRS generally treats the contribution as a reduction in your purchase price rather than taxable income. That can lower your cost basis in the home and slightly increase a future capital gains calculation when you sell. The IRS applies similar treatment to seller-paid discount points, which explicitly reduce basis.⁶

Whether you can deduct the interest that a seller-funded buydown covers on your behalf is less settled. IRS Publication 936 says you cannot deduct mortgage interest paid for you under certain government assistance programs, and the same logic likely applies here: you can only deduct interest you actually paid out of pocket.⁷ Because the IRS hasn’t addressed buydown subsidies in explicit published guidance, checking with a tax professional before claiming a deduction is worth the time.

1
Department of Veterans Affairs. Temporary Buydowns – VA Home Loans
2
Fannie Mae. B2-1.4-04, Temporary Interest Rate Buydowns
3
Fannie Mae. Interested Party Contributions (IPCs)
4
U.S. Department of Housing and Urban Development. Adjustable Rate Mortgages and Interest Buydowns
5
Federal Housing Finance Agency Office of Inspector General. Temporary Interest Rate Buydowns Dashboard
6
Internal Revenue Service. Publication 551, Basis of Assets
7
Internal Revenue Service. Publication 936, Home Mortgage Interest Deduction