Builders and sellers often offer 2-1 or 3-2-1 temporary rate buydowns. Compute year-by-year payment + escrow amount needed to fund the buydown.
Detailed instructions, formula notes, and US-context guidance shown in the calculator above.
Disclaimer: Estimate only. Consult a qualified professional for decisions with major financial, legal, or health consequences.
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📋 How to use this calculator
- Enter loan amount, target permanent rate, and the buydown structure (2-1 or 3-2-1).
- Enter loan term (typically 30 years).
- Review year-by-year monthly payments during the buydown period and the escrow amount needed.
- Compare total buydown cost vs simply offering equivalent price reduction.
- Note: Buydown funds sit in escrow at closing — typically paid by seller or builder as concession.
🧮 Temporary Rate Buydown (2-1 / 3-2-1)
Buydown_Cost = sum over buydown years of (Permanent_payment - Reduced_payment) x 12
- 2-1: Year 1 rate = Note rate - 2%, Year 2 = -1%, Year 3+ = note rate
- 3-2-1: Year 1 = Note rate - 3%, Year 2 = -2%, Year 3 = -1%, Year 4+ = note rate
- Payment calculated using standard amortization on the NOTE rate, then discount applied
- Escrow holds total buydown amount, disbursed monthly to lender
- Funded by seller/builder concession at closing (max varies by loan type, often 3-6%)
Conventional/FHA/VA allow buydown concessions within seller concession limits. If borrower refinances or sells during buydown period, unused escrow returns to the lender or original payer per agreement. Buyer must still qualify at the FULL note rate, not the reduced rate.
💡 Worked example: $400K loan, 7.5% note rate, 2-1 buydown
Given:- Loan amount: $400,000
- Note rate (permanent): 7.5% — monthly P&I $2,797
- Year 1 rate (note - 2%): 5.5% — monthly P&I $2,271
- Year 2 rate (note - 1%): 6.5% — monthly P&I $2,528
- Year 3+ rate: 7.5% — back to $2,797
Steps:- Year 1 monthly savings: $2,797 - $2,271 = $526
- Year 2 monthly savings: $2,797 - $2,528 = $269
- Year 1 annual buydown cost: $526 x 12 = $6,312
- Year 2 annual buydown cost: $269 x 12 = $3,228
- Total escrow needed at closing: $6,312 + $3,228 = $9,540
Result: Seller funds $9,540 at closing into escrow. Buyer's first year P&I is $526/month lower, easing the transition into a high-rate environment.
❓ Frequently asked questions
Should I take a 2-1 buydown or just negotiate a lower price?
Math comparison: a $9,540 buydown saves $9,540 in cash flow over 2 years. A $9,540 price reduction at 7.5% saves $66.78/month for 30 years = $24,041 in total interest avoided. Long-term, price reduction wins. But buydown wins for buyers who need short-term cash flow relief — first-year payment $526 lower, often the difference between qualifying and not, or between affording moving costs.
Can I refinance during a buydown?
Yes, but most lenders require unused buydown funds to be returned to the original payer (seller/builder) or applied to principal. Read your buydown agreement carefully — some return funds to borrower, most don't. If rates drop and you refinance in year 1, you may forfeit the year-2 escrow.
Do I qualify at the buydown rate or the note rate?
The note rate, in nearly all cases. Fannie Mae, Freddie Mac, FHA, and VA all require qualifying at the full note rate (or higher of note vs reduced) for temporary buydowns. The buydown reduces actual monthly out-of-pocket but not the DTI calculation. The exception: 'extended buydown' products (rare) may qualify at reduced rate.
Who pays for the buydown — me or the seller?
In most 2026 transactions, the SELLER or BUILDER pays. It's a common concession in slow markets to maintain headline sale price while offering effective discount. Builder programs (Lennar, KB Home, DR Horton) frequently advertise 'buy this house with a 2-1 buydown' as marketing. Buyer-funded buydowns exist but are rare — same money buys more value as price reduction or permanent rate lock.
Are buydowns better than discount points?
Different tools. Discount points PERMANENTLY reduce the rate by ~0.25% per point (1% of loan), better for buyers staying 5+ years. Temporary buydowns provide larger initial relief but rate snaps back. Compare break-even: a $9,540 buydown breaks even at month 24 (when escrow exhausts). $9,540 in discount points at 0.25%/point reduction breaks even at month 33-36. Buydown wins for shorter holding period.
📚 Sources & references
Last updated: May 23, 2026