Temporary Buydown Calculator

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Explore points, temporary buydowns and loan costs using actual quotes or clearly labeled assumptions.

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Calculator estimates are educational. A real mortgage professional can review your circumstances, documentation and lender requirements. A scenario review is not a loan approval or a guarantee of terms.

210 Mortgage | NMLS #219381

210 MORTGAGE • SCENARIO TOOLS

See the subsidy and the full payment

This temporary buydown calculator compares 1-0, 2-1 and 3-2-1 schedules, including the estimated fund needed and the payment after the subsidy ends.

1. Loan terms

The note rate stays in effect throughout the mortgage.

Financed loan amount ($)

Use the final amount on the loan, including any permitted financed fee.

Permanent note rate (%)

Enter a hypothetical rate or a comparable quote; this is not an advertised 210 rate.

Loan term

Fixed-rate fully amortizing loan only.

2. Buydown and complete housing costs

Choose a schedule and add the other housing expenses as a monthly total.

Temporary buydown schedule

Reductions are percentage points, not percent changes.

Other monthly housing costs ($)

Taxes + insurance + mortgage insurance + HOA + other housing costs. Enter zero only if none apply.

No contact information required. Numbers stay in the browser unless you choose to share them in a review request.

Your scenario estimate

Complete the numbered sections, then select Calculate.

ESTIMATED TOTAL BUYDOWN FUND

Full note-rate principal and interest
Full monthly housing payment
First-year borrower housing payment
Loan balance when subsidy period ends

Swipe or scroll the comparison table to see every column.

Temporary payments and subsidy schedule; final row starts the unsubsidized period
Year	Payment-model rate	Borrower P&I	Total borrower housing	Monthly subsidy	12-month subsidy

This models the cost, not buydown eligibility or permitted funding. Fannie Mae qualifying uses the full note rate. Other programs and lenders control availability, contribution limits and agreement terms.

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Send your question and, if you choose, attach these estimates for a personal scenario review.

Educational estimates, not approval, a rate quote or a commitment to lend. Entered rates are hypothetical modeling assumptions, not currently available 210 Mortgage rates. No APR calculation, ARM changes or automatic eligibility decision. Reduced payments are hypothetical contributions, not changing contractual note rates. Unused-fund treatment depends on the buydown agreement. 210 Mortgage • Tyler Krug NMLS #219381 • Mortgage loans originated through My Community Mortgage, LLC NMLS #2408499 • Equal Housing Lender. See site licensing and disclosures.

How to Use the Temporary Buydown Calculator

Step 1: Loan terms

Enter the total financed principal, fixed note rate and amortizing term. A temporary buydown subsidizes payments; it does not replace the contractual note rate.

Step 2: Buydown and complete housing costs

Select 1-0, 2-1 or 3-2-1. Add monthly property taxes, homeowners/flood insurance, mortgage insurance, HOA and other required housing expenses. These are held constant and are not subsidized by this model.

Calculate, compare and request a review

Choose Calculate to see your estimate. Change one assumption at a time and calculate again. Contact information is optional. Use the review form or Text a Question when you need help verifying the inputs.

How the Calculator Works

Each temporary P&I contribution is calculated using the original principal and original term at note rate minus the scheduled reduction. Note-rate P&I and temporary P&I are rounded separately to cents; monthly subsidy is their difference. The fund is the sum of 12 monthly subsidies for each reduced-payment year. Loan balances amortize at the note rate.

Example calculation

For $300,000 over 30 years at a 7% note rate, note P&I is $1,995.91. A 2-1 schedule models year-one P&I at 5% and year-two at 6%, with the full payment from year three. The rounded-payment fund is approximately $6,992.52, before any administrative fee.

How to interpret your results

The fund is an estimated deposit to support the payment schedule, not a discount-point charge. Future tax or insurance increases can change total housing costs even while the subsidy schedule is fixed.

Assumptions and factors that change the result

Standard whole-year schedules and a fixed fully amortizing loan. No admin fee, contribution cap, qualifying-income analysis, ARM, escrow increase or guaranteed refinance. Rates cannot fall below zero in a selected schedule. Actual lender rounding and agreement terms may differ.

Frequently asked questions

Does the loan amortize at the lower temporary rate?

No. In this model the full note-rate payment is received and principal amortizes at the note rate.

Can I qualify using the first-year payment?

Fannie Mae requires note-rate qualification. Verify the applicable agency and lender requirements for your actual loan.

Related 210 Mortgage guides

Methodology sources

Guideline references checked October 6, 2026. Mathematical comparisons do not replace the applicable lender’s review.

Fannie Mae temporary buydown requirements