Temporary Mortgage Buydown Calculator

See the credits needed and monthly savings of a 1-0, 2-1, and 3-2-1 buydown.

HOME PURCHASE PLANNING

Temporary Rate Buydown
Calculator

See the payment path. Plan for what comes next.

Compare 1-0, 2-1 and 3-2-1 structures with your loan amount and note rate.

Illustrative inputs, not a rate quote. Principal and interest only.

Get a personalized scenario ↗

UNDERSTAND THE NUMBERS

A clearer view of your first years.

01

Temporary payment

See the principal-and-interest payment for each introductory year and how it steps up over time.

02

Upfront subsidy

The total of the monthly payment differences during the temporary period. Confirm permitted funding and seller-credit limits.

03

Full payment

Plan for the full note-rate payment after the temporary period. The contractual note rate stays the same.

COMPARE THE STRUCTURES

One, two, or three introductory years.

Illustrative example · $400,000 loan
30-year term · 6.50% note rate

1–0

One-year start

Year 1 $2,271
Year 2 onward $2,528

ESTIMATED SUBSIDY $3,085

2–1

Two-year transition

Year 1 $2,027
Year 2 $2,271
Year 3 onward $2,528

ESTIMATED SUBSIDY $9,104

3–2–1

Three-year transition

Year 1 $1,796
Year 2 $2,027
Year 3 $2,271
Year 4 onward $2,528

ESTIMATED SUBSIDY $17,889

BEFORE YOU MAKE AN OFFER

Good questions.
Clear answers.

How do I use the calculator?

Enter your loan amount, full note rate and term. Select 1-0, 2-1, or 3-2-1, then compare the introductory payments with the full payment after the temporary period.

What does the payment schedule include?

The calculator estimates principal and interest, monthly payment assistance and total subsidy. Property taxes, homeowners insurance, mortgage insurance and HOA dues are not reduced by the Temporary Rate Buydown.

Is this the same as permanent discount points?

No. A Temporary Rate Buydown reduces initial payments for a limited period without changing the note rate. Permanent discount points generally involve an upfront cost to obtain a lower note rate for the life of the loan.

What should California homebuyers confirm?

Use your expected loan amount and quoted note rate. Confirm program availability, permitted funding sources and seller-credit limits before negotiating an offer. Borrowers should be prepared for the full note-rate payment.

Read the complete Temporary Rate Buydown guide ↗

LOCAL KNOWLEDGE. PERSONAL GUIDANCE.

Make the numbers
work for your purchase.

Compare the full payment, temporary schedule, subsidy cost and available credits for your home purchase in SLO County or elsewhere in California.

GET A PERSONALIZED RATE QUOTE ↗Talk through your options

Sean Mertens · Assist Home Loans
NMLS #2047444

MORE WAYS TO PLAN

Get a Personalized Purchase Scenario

How to Use the Buydown Calculator

  1. Enter the loan amount.
  2. Enter the full note rate and mortgage term.
  3. Select the temporary buydown structure.
  4. Review the payment for each buydown year.
  5. Compare those payments with the full note-rate payment that begins after the temporary period.

The note rate is the contractual interest rate on the mortgage. A temporary buydown uses deposited funds to cover part of the required payment during the initial period; it does not permanently change the note rate.

Understanding the Result

Full note-rate payment

The estimated principal-and-interest payment after the temporary buydown ends.

Temporary payment

Calculated using the rate reduction assigned to that year.

Monthly payment assistance

The difference between the full note-rate payment and the temporary payment.

Estimated subsidy cost

The total of those monthly differences during the buydown period.

Property taxes, homeowners insurance, mortgage insurance and HOA dues are not reduced by the temporary buydown.

Worked Example

Illustrative example only—not a rate quote.

For a $400,000, 30-year mortgage with a 6.50% note rate, the estimated principal-and-interest payment is approximately $2,528. With an illustrative 2-1 temporary buydown:

  • Year 1 payment, calculated at 4.50%: approximately $2,027
  • Year 2 payment, calculated at 5.50%: approximately $2,271
  • Year 3 and after, at the 6.50% note rate: approximately $2,528
  • Estimated total subsidy needed: approximately $9,104

Actual program eligibility, funding and qualification requirements vary. Borrowers should be prepared for the full note-rate payment.

1-0 Temporary Rate Buydown Example

On a hypothetical $400,000, 30-year fixed loan with a 6.50% note rate, the full monthly principal-and-interest payment is $2,528.27. A 1-0 Temporary Rate Buydown reduces the buyer's payment to $2,271.16 for the first 12 months—about $257 less per month. The full payment begins in year 2.

Estimated upfront subsidy: approximately $3,085.

3-2-1 Temporary Rate Buydown Example

Using the same hypothetical $400,000 loan, 30-year term and 6.50% note rate:

  • Year 1: $1,796.18 monthly principal and interest—about $732 less per month.
  • Year 2: $2,026.74—about $502 less per month.
  • Year 3: $2,271.16—about $257 less per month.
  • Year 4 onward: the full $2,528.27 monthly principal-and-interest payment.

Estimated upfront subsidy: approximately $17,889.

These examples are illustrations, not current rate quotes. Payments exclude taxes, homeowners insurance, mortgage insurance, HOA dues and fees. Subsidy estimates are rounded. The contractual note rate does not change, and eligibility and permitted funding sources vary by lender and loan program.

Planning a Purchase in SLO County or Elsewhere in California?

Use your expected loan amount and quoted note rate to compare the introductory payments with the full payment. Confirm program availability, permitted funding sources and seller-credit limits before negotiating an offer.

Read our Temporary Rate Buydown guide for details on 1-0, 2-1 and 3-2-1 plans, costs, qualification, seller funding and refinancing.

Temporary vs. Permanent Buydowns

A temporary buydown reduces the initial payment for a limited period. A permanent buydown generally involves paying discount points to obtain a lower note rate for the life of the loan. They solve different problems and should be compared using the expected time in the mortgage, upfront cost and long-term payment.

Get a Personalized Purchase Scenario

Compare the full note-rate payment, temporary payment schedule, subsidy cost and available credits for your specific purchase.

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