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Free Buydown Calculator

Buydown Calculator

1-0, 1-1, 2-1 & 3-2-1 Temporary Rate Buydowns — Purchase & Refinance

Use our free interest rate buydown calculator to model 1-0, 1-1, 2-1, and 3-2-1 temporary buydown programs on a purchase or refinance. Compare year-one payments against the note rate, estimate the buydown subsidy cost, see all four buydown structures side by side, and explore 10- to 30-year mortgage terms.

100% Free No Sign-Up Purchase & Refinance Shareable Results

Temporary Buydown Calculator

1-0, 1-1, 2-1 & 3-2-1 Buydown Calculator

Estimate temporary rate buydown payments, monthly savings, and subsidy cost for purchase and refinance loans.

1-0 Buydown1-1 Buydown2-1 Buydown3-2-1 BuydownPurchase & Refinance10–30 Year Terms

Loan Details

$400,000
$100,000$2,000,000
$80,000
$0$400,000

20.0% of home price

6.250%
0.000%15.000%

Loan Term

Buydown Program

Temporary interest rate buydown structure

Buydown Results

1-0 · 30-year purchase

Estimated Buydown Subsidy

$2,439

Total payment difference funded during the buydown period

Year 1 Payment

$1,767

at 5.250%

Note Rate Payment

$1,970

at 6.250%

Save $203/mo in year 1

Year-by-Year Schedule

Year 15.250%

$1,767/mo

$2,439 annual savings

Year 26.250%

$1,970/mo

Full note rate — payment increases from buydown period

Payment after buydown period

Starting year 2, your payment returns to $1,970/mo at the full note rate for the remaining 30-year term.

Need a Real Buydown Quote?

Talk with a loan officer about 1-0 buydown options for your purchase.

Compare All Buydown Structures at Your Numbers

Same $320,000 loan at 6.250% over 30 years. Tap a program to select it.

This 1-0 buydown calculator provides estimates only. Subsidy amounts, seller or lender concessions, and program eligibility depend on lender guidelines, loan type, and underwriting. Payments shown are principal and interest and exclude taxes and insurance. Not a commitment to lend.

Calculator Disclaimer

This mortgage buydown calculator provides estimates based on your inputs. Actual buydown costs, savings, and eligibility may vary based on credit, loan program, property type, market rates, lender policies, and seller concessions available.

Consult a mortgage expert for personalized buydown options. Results are for informational purposes only and do not constitute a commitment to lend.

How to Use the Buydown Calculator

Step 1

Choose Purchase or Refinance, then enter your loan details and note rate

Step 2

Select buydown type (1-0, 1-1, 2-1, or 3-2-1) and loan term

Step 3

Review year-by-year payments, estimated subsidy, and the side-by-side program comparison

Step 4

Share results or speak with a loan officer for exact terms

What This Buydown Estimate Includes

Estimated buydown subsidy (total payment difference)

Year 1 monthly payment at reduced rate

Note-rate payment comparison

Refinance mode: current payment vs new buydown payment

Side-by-side comparison of all four buydown structures

Year-by-year rate and payment schedule

10-, 15-, 20-, 25-, and 30-year amortization options

Payment jump warning after buydown period

Shareable link with your scenario inputs

1-0 vs 1-1 vs 2-1 vs 3-2-1 Buydown Comparison

1-0 Buydown

Years with reduced rate
1 year
Year 1 rate reduction
1% below note rate
Year 2 rate reduction
None (note rate)
Typical subsidy cost
About 1% of loan amount
Best for
Lower upfront cost, year-one payment relief

1-1 Buydown

Years with reduced rate
2 years
Year 1 rate reduction
1% below note rate
Year 2 rate reduction
1% below note rate
Typical subsidy cost
About 2% of loan amount
Best for
Steady savings over two years

2-1 Buydown

Years with reduced rate
2 years
Year 1 rate reduction
2% below note rate
Year 2 rate reduction
1% below note rate
Typical subsidy cost
2–3% of loan amount
Best for
Moderate early savings

3-2-1 Buydown

Years with reduced rate
3 years
Year 1 rate reduction
3% below note rate
Year 2 rate reduction
2% below note rate
Typical subsidy cost
3–4% of loan amount
Best for
Maximum early payment relief

What Is a 1-0 Buydown?

A 1-0 buydown is a temporary interest rate buydown that lowers your rate by 1% in the first year, then returns to the note rate. It is a straightforward way to reduce your initial monthly payment with a smaller buydown subsidy than multi-year programs like 2-1 or 3-2-1. Use the calculator above to estimate your year-one payment and total subsidy based on your loan amount and note rate.

Learn more about buydown programs on our temporary buydown guide.

Refinance Rate Buydown

Temporary buydowns are not just for home purchases. Many lenders allow a 1-0, 1-1, 2-1, or 3-2-1 buydown on a rate-and-term or cash-out refinance. Because there is no seller on a refinance, the subsidy is typically funded through a lender credit or paid at closing. A refinance buydown can bridge the gap while you wait for rates to fall further — you lower your payment immediately in year one, then settle at the new note rate, which may still be well below your current rate.

Compare against your current payment

Switch the calculator to Refinance mode, enter your current interest rate, and see exactly how much you save in year one versus what you pay today.

Lender-paid buydown programs

Some lenders offer credits that fund part or all of the buydown subsidy on refinances. Ask your loan officer which programs your loan type qualifies for.

Watch the break-even

If you pay for the buydown yourself, compare the subsidy cost to your total savings and how long you plan to keep the loan before refinancing again.

Weighing a full refinance instead? Try our refinance calculator to compare closing costs and break-even timing.

How This Buydown Calculator Works

For each year of the buydown structure, the calculator computes a standard amortized monthly principal-and-interest payment at the reduced rate over the full loan term. The buydown subsidy is the sum, across every discounted year, of the difference between the full note-rate payment and the reduced-rate payment, multiplied by 12. In Refinance mode, it also estimates your current payment from your existing rate so you can see year-one savings against what you pay today.

Worked Example: 2-1 Buydown

Loan amount $320,000 at a 6.25% note rate on a 30-year term. The full note-rate payment is about $1,970/mo. In year one the rate drops to 4.25% (payment ≈ $1,574/mo, saving ≈ $396/mo). In year two the rate is 5.25% (payment ≈ $1,767/mo, saving ≈ $203/mo). The estimated buydown subsidy is ($396 + $203) × 12 ≈ $7,188, funded at closing by the seller, builder, lender, or borrower.

Payments shown are principal and interest only and exclude property taxes, homeowners insurance, and mortgage insurance. Actual buydown escrow requirements vary by lender and loan program.

Temporary Buydown vs Discount Points

FeatureTemporary BuydownDiscount Points
Rate reduction duration1–3 years, then note rateEntire loan term
Upfront costBuydown subsidy fundPoints paid at closing
Payment patternLower initially, then increasesConsistently lower payment
Common payerSeller or builderBuyer
Best whenYou need short-term payment reliefYou plan to stay long-term

Compare permanent rate reduction with our discount points calculator.

Example Buydown Scenarios

1-0 Buydown

$400k home, 20% down, 6.25% note rate, 30-year term

2-1 Buydown

$425k home, 20% down, 6.5% note rate, 30-year term

3-2-1 Buydown

$500k home, 20% down, 6.75% note rate, 30-year term

Refinance Buydown

$350k refinance from 7.875% to 6.5% with a 1-0 buydown in year one

Understanding Mortgage Buydowns

A temporary mortgage buydown reduces your interest rate for the first one to three years of your loan, then returns to the note rate. The 1-0 buydown — our most popular option — lowers your rate by 1% in year one. Multi-year programs like 1-1, 2-1, and 3-2-1 offer deeper or longer early savings on 10- to 30-year loan terms, and buydowns can be used on both purchase and refinance loans.

Types of Buydowns

1-0 Buydown

Interest rate is reduced by 1% in year 1, then returns to the note rate.

Year 1
-1%
Year 2+
Note Rate

1-1 Buydown

Interest rate is reduced by 1% in years 1 and 2, then returns to the note rate.

Year 1
-1%
Year 2
-1%
Year 3+
Note Rate

2-1 Buydown

Interest rate is reduced by 2% in year 1 and 1% in year 2, then returns to the note rate.

Year 1
-2%
Year 2
-1%
Year 3+
Note Rate

3-2-1 Buydown

Rate reduces by 3% first year, 2% second year, and 1% third year.

Year 1
-3%
Year 2
-2%
Year 3
-1%
Year 4+
Note Rate

Benefits & Considerations

Benefits

  • Lower initial monthly payments
  • Easier qualification for homebuyers
  • Time to adjust to homeownership costs
  • Potential for future rate decreases
  • Can be paid by seller or builder

Considerations

  • Upfront cost of buying down the rate
  • Payment increases after buydown period
  • May not be best if planning to move soon
  • Consider future income expectations

Benefits of Mortgage Buydowns

Discover how temporary buydowns can make homeownership more affordable

Lower Initial Payments

Reduce your monthly mortgage payment during the first few years, making it easier to manage your budget as a new homeowner.

Easier Qualification

Lower initial payments can help you qualify for a larger loan amount or meet debt-to-income ratio requirements.

Seller Incentives

Many sellers and builders offer buydowns as incentives, paying the cost to make their properties more attractive to buyers.

Buydown Calculator FAQ

Can you use a temporary buydown on a refinance?

Yes. Temporary buydowns are available on many rate-and-term and cash-out refinance loans, not just purchases. On a refinance, the buydown subsidy is typically paid by the lender as a credit or funded at closing, since there is no seller. Use the Refinance tab on the calculator above to compare your current payment against year-one refinance payments with a 1-0, 1-1, 2-1, or 3-2-1 buydown.

What is a 1-1 buydown?

A 1-1 buydown reduces your interest rate by 1% for the first two years of the loan, then returns to the note rate in year three. It spreads moderate savings across two years instead of concentrating a larger reduction in year one, and typically costs about 2% of the loan amount.

Who pays for a buydown on a refinance?

On a refinance there is no seller, so the buydown subsidy is usually paid by the lender through a lender credit, or by the borrower at closing. Some lenders offer lender-paid buydown programs specifically for refinances. Ask your loan officer which structures are available for your loan type.

What is a 1-0 buydown?

A 1-0 buydown reduces your interest rate by 1% in the first year, then returns to the note rate for the remainder of the loan. It is a popular temporary buydown option when you want lower year-one payments with a smaller upfront subsidy than a 2-1 or 3-2-1 program.

How does a 1-0 buydown calculator work?

Enter your home price, down payment, note rate, and loan term. The calculator applies a 1% rate reduction in year one, compares your buydown payment to the full note-rate payment, and estimates the total buydown subsidy needed to fund the difference.

How does a 3-2-1 buydown calculator work?

A 3-2-1 buydown calculator estimates your monthly payment when the interest rate is reduced by 3% in year one, 2% in year two, and 1% in year three, then returns to the note rate. Enter your home price, down payment, note rate, and loan term to see year-by-year payments and the total buydown subsidy required.

How much does a 2-1 buydown cost?

A 2-1 buydown typically costs about 2–3% of the loan amount, representing the total payment difference funded during the first two years. Use this calculator to estimate the exact subsidy based on your loan amount, rate, and term. Sellers often pay this cost as a concession.

What is a seller buydown?

A seller buydown is when the home seller (or builder) pays the upfront cost to temporarily reduce the buyer's interest rate for the first one to three years. This makes the home more affordable initially and can help buyers qualify. The subsidy is typically deposited into an escrow account at closing.

What is the difference between a temporary buydown and discount points?

A temporary buydown (1-0, 2-1, or 3-2-1) lowers your rate for only the first few years, then returns to the note rate. Discount points permanently reduce your interest rate for the entire loan term. Use our discount points calculator to compare permanent rate reduction options. Discount Points Calculator.

What is a mortgage buydown?

A mortgage buydown is a financing technique where an upfront payment reduces your interest rate for the initial years of your mortgage. This lowers monthly payments during early homeownership, making it easier to afford your new home.

What is a 2-1 buydown?

A 2-1 buydown reduces your interest rate by 2% in the first year and 1% in the second year, then returns to the note rate for the remainder of the loan.

What is a 3-2-1 buydown?

A 3-2-1 buydown reduces your interest rate by 3% in the first year, 2% in the second year, and 1% in the third year, then returns to the note rate. This provides more savings in the early years but requires a larger upfront subsidy.

How much does a buydown cost?

Buydown costs vary based on loan amount, rate reduction, and lender policies. A 1-0 buydown typically costs about 1% of the loan amount, a 2-1 buydown costs 2–3%, and a 3-2-1 buydown costs 3–4%. The seller or builder may pay these costs as a concession.

Who pays for a mortgage buydown?

The buyer, seller, or builder can pay for a buydown. In many cases, sellers or builders offer buydowns as incentives to make homes more affordable. The cost is typically paid at closing as part of the loan origination.

Is a buydown worth it?

A buydown can be worth it if you need lower payments initially, expect your income to increase over time, or if the seller or builder is paying for it. Consider the upfront cost versus the monthly savings and how long you plan to stay in the home.

Can I refinance with a buydown?

Yes, in both directions. You can refinance a mortgage that currently has a buydown at any time, though refinancing during the buydown period may forfeit remaining buydown benefits (many lenders credit unused escrow funds toward the payoff). You can also add a temporary buydown to a new refinance loan — use the Refinance tab on the calculator above to model it.

What's the difference between a temporary and permanent buydown?

A temporary buydown (like 1-0, 2-1, or 3-2-1) reduces the rate for only the first few years, then returns to the note rate. A permanent buydown uses discount points to permanently lower the interest rate for the entire loan term.

Ready to Lower Your Mortgage Rate?

Our mortgage experts can help you find the best 1-0, 1-1, 2-1, or 3-2-1 buydown options for your purchase or refinance.