2-1 Buydown Calculator

How a 2-1 Buydown Works

In a 2-1 buydown on a $330,000 loan at an illustrative 7% note rate, your effective rate in year one is 5% and in year two it is 6%. From year three onward, you pay the full 7%. The difference between the reduced payments and the full payments is funded by the buydown account — a prepaid escrow that the builder, seller or sometimes the buyer funds at closing.

The upfront cost of the buydown equals the total payment difference across the two reduced years. On the $330,000 example, the year-one savings (the gap between the 7% payment and the 5% payment) plus the year-two savings (the gap between 7% and 6%) might total $10,000 to $15,000 depending on exact rates. That money sits in the buydown account and subsidizes your payment — it does not reduce your principal. Once the fund is exhausted after year two, your payment jumps to the full amount. You must qualify at the full note rate, not the temporary one.

Buydown vs Price Reduction: The Comparison

If the seller or builder is willing to contribute $12,000 toward your purchase, that money could fund a 2-1 buydown or reduce the sale price by the same amount. The two options produce different outcomes. A price reduction lowers your loan balance permanently: you borrow $12,000 less, which reduces every single payment for the full 30-year term and also lowers your total interest paid. A buydown gives you larger savings in the first two years but costs more starting in year three because your balance — and therefore your payment — is higher than it would have been with the price cut.

The calculator shows cumulative cost at year three, year five and year ten so the crossover is visible. Buydowns tend to win if you plan to sell or refinance within the first few years, because you capture the steep early savings without enduring the higher payments later. Price reductions tend to win if you plan to hold the loan for a decade or more. Many buyers on personal-finance forums who chose buydowns during the 2022-2023 period expected to refinance quickly into lower rates — those who did came out ahead, while those still waiting are now paying the full note rate.

You must qualify at the full note rate, not the temporary buydown rate. The buydown cost is funded at closing, usually as a seller or builder concession.