Should a Florida Buyer Use a Seller-Funded 2-1 Mortgage Buydown?

How the 2-1 buydown works

In a common 2-1 structure, the borrower makes payments as if the interest rate were two percentage points below the note rate in year one and one point below it in year two. From year three forward, the borrower pays the full note-rate payment. A funded account covers the difference during the buydown period; the mortgage note itself does not change. Fannie Mae permits temporary buydowns on eligible principal residences and second homes, subject to its written-agreement and funding rules. Investment properties are ineligible under that guide. Read Fannie Mae’s temporary buydown guide.

That distinction matters. I do not want a buyer to shop from the first-year payment and discover later that the permanent payment strains the household budget. Fannie Mae requires the lender to qualify the borrower using the note rate, without the temporary discount. See its qualifying-payment rule.

A transparent payment example

Assume a $400,000, 30-year fixed loan with a hypothetical 7% note rate. This is a math illustration, not a current rate quote or an offer of credit. Principal and interest at the note rate would be about $2,661 a month. A 2-1 buydown would produce approximately the following borrower payments:

The approximate subsidy is 12 times the first-year payment difference plus 12 times the second-year difference, or about $9,323 in this example. Taxes, insurance, mortgage insurance, association dues and closing costs are excluded. The actual funded amount and disclosures must come from the lender’s written plan.

How a seller credit changes the negotiation

A seller or builder may offer to fund the buydown, but that money counts toward Fannie Mae’s interested-party contribution limits. The applicable cap depends on occupancy and loan-to-value ratio. Before writing the offer, I ask for the price, down payment, occupancy, other seller-paid costs and the lender’s buydown quote. I then check the entire concession package against the applicable cap—not just the rate subsidy. Fannie Mae explains the contribution limits; my Florida seller-concession guide walks through them.

When a seller is willing to give the same dollar amount in another form, compare the 2-1 buydown with a permanent rate reduction, a smaller purchase price and allowable closing-cost credits. The best choice depends on how long the buyer expects to hold the loan, cash available at closing and the full payment after the buydown ends. A future refinance is a possibility, never a plan I would require for affordability.

My five checks before I recommend one

1. Full-payment comfort: Can the buyer carry the note-rate payment plus property taxes, Florida insurance, possible flood coverage, dues and maintenance?
2. Written funding: Is the buydown agreement documented and fully funded under the lender’s program?
3. Concession room: Do all seller and builder contributions fit the correct agency limit?
4. Side-by-side costs: What do the Loan Estimates show for points, lender credits, cash to close and longer-term costs?
5. Exit flexibility: What does the written agreement say about unused funds if the loan is paid off early?

The CFPB’s Loan Estimate comparison guide shows the numbers I ask buyers to compare, especially lender costs, credits and the five-year borrowing cost. I will review a buydown only as part of that full comparison.

Ask for these three written versions of the same offer

I ask the lender to price the same home, down payment, loan term and lock period three ways: no seller credit, a seller-funded temporary buydown, and an allowable credit toward permanent points or closing costs. A different purchase price can be a fourth comparison if the seller is open to it. Keeping the other assumptions fixed reveals what the credit actually changes.

For each version, write down cash to close, the first-year payment, the permanent payment, mortgage insurance if any, and the total interest and fees over the expected holding period. A first-year payment can look appealing while costing more over five years, especially if an alternative credit could have reduced permanent borrowing costs. Conversely, a buyer who expects to sell soon may value immediate payment relief more than a permanent rate reduction. That is a decision to make with numbers, not a slogan.

My decision

A 2-1 buydown can be useful when a buyer already qualifies at—and is comfortable with—the permanent payment, and a negotiated seller credit funds short-term breathing room. If the deal only works at the first-year payment, I would change the price, down payment, property or loan structure before calling it affordable.

Related Florida guides

• Florida seller-concession limits
• Rate, APR and points explained
• Florida mortgage calculator inputs