Finance category
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Temporary Buydown Calculator
See how a 3-2-1, 2-1, or 1-0 temporary buydown reshapes the first few years of a mortgage. Compare the reduced payments against the permanent note payment and calculate the upfront subsidy a seller, builder, or buyer would need to fund.
Permanent payment
$2,918.69
Year 3 through payoff at the note rate
Year 1 payment
$2,347.41
At 4.750%
Year 1 savings
$6,855.34
Total subsidy cost
$10,366.70
Year-by-year payment path (2-1 buydown (2 years))
The buydown rate is temporary. The payment steps up each year until it reaches the note payment.
| Year | Rate | Monthly payment | Monthly savings vs. note | Annual subsidy |
|---|---|---|---|---|
| 1 | 4.750% | $2,347.41 | $571.28 | $6,855.34 |
| 2 | 5.750% | $2,626.08 | $292.61 | $3,511.36 |
| 3+ | 6.750% | $2,918.69 | — | — |
Budget check
Underwriting usually qualifies you at the full note rate even when a seller or builder is funding the buydown. Make sure the permanent payment is affordable before using the subsidized year-one payment for budgeting.
EveryCalc calculators are designed for fast, practical estimates with transparent inputs and no required account. We use plain formulas, visible assumptions, and related tools so visitors can check the result from more than one angle.
Results are informational only. For financial, tax, legal, medical, construction, or other high-impact decisions, verify the output against primary sources or a qualified professional.
Learn more about our review process on the EveryCalc methodology page.
How this calculator works
What this page estimates
This Temporary Buydown Calculator is built to give a quick, browser-based estimate for temporary buydown. See how a 3-2-1, 2-1, or 1-0 temporary buydown reshapes the first few years of a mortgage. Compare the reduced payments against the permanent note payment and calculate the upfront subsidy a seller, builder, or buyer would need to fund. The inputs stay on the page during normal use, and the result should be treated as an estimate for planning, comparison, or education rather than professional advice.
Calculation approach
The calculator applies the standard relationship implied by the inputs, then formats the answer so it can be checked and reused. For finance tools, the most important step is using consistent units, rates, time periods, and assumptions before comparing the result with another calculator or outside quote.
Example workflow
For example, start with a realistic value you already know, change one input at a time, and watch how the answer moves. That makes it easier to tell whether the result is being driven by the main amount, the rate, the time period, or a unit conversion.
Practical checks
- Use current, real-world numbers when the result affects money, health, tax, or legal decisions.
- Run a low, base, and high case when the inputs are estimates.
- Check the related calculators below when the next decision depends on a different assumption.
How to interpret the temporary buydown result
Best use
Use the result as a planning number for comparing payments, rates, returns, tax reserves, or cash-flow choices before you request a quote or make a commitment.
Cross-check
Compare the answer with the contract, lender estimate, tax form, brokerage statement, payroll record, or invoice that will control the real-world outcome.
Watch for
Do not rely on a single optimistic rate, return, or fee assumption. Money pages work best when you run low, base, and high cases and keep professional advice separate from the estimate.
This page belongs to the Finance calculator library, so the answer should be read in the context of the decision you are modeling rather than as a universal rule.
Before relying on this temporary buydown estimate
Most calculator mistakes come from the inputs, not the arithmetic. Use this short audit before you reuse the answer in a spreadsheet, quote, application, or important conversation.
Confirm source numbers
Match balances, rates, fees, taxes, income, and payment dates against the lender quote, payroll record, tax form, statement, invoice, or contract.
Separate cash flow from total cost
A lower monthly payment can still cost more over time if fees, interest, taxes, or a longer term are hidden in the structure.
Run conservative cases
Test at least one higher-cost or lower-return case before using the output for a purchase, refinance, investment, loan, or tax decision.
Rerun this page when the rate, price, term, fee, tax rule, income, expense, or expected holding period changes.
How to Use
- Enter the loan amount, the permanent note rate, and the loan term being offered.
- Pick the buydown structure — 3-2-1, 2-1, or 1-0 — based on what your lender or builder is quoting.
- Review the first-year payment, each subsequent step-up, and the permanent note payment that starts after the buydown ends.
- Check the total subsidy cost so you know how much the seller, builder, or buyer would need to escrow at closing to fund the reduced payments.
Frequently Asked Questions
What is a temporary mortgage buydown?
A temporary buydown lowers the borrower's effective interest rate for the first one to three years of the mortgage. Funds escrowed at closing cover the payment difference so the borrower pays a lower amount early in the loan.
How does a 3-2-1 buydown differ from a 2-1 buydown?
A 3-2-1 cuts the rate by 3% in year one, 2% in year two, and 1% in year three before reverting to the note rate. A 2-1 is a shorter two-year version. Both settle at the permanent note rate once the subsidy runs out.
Who pays for the subsidy?
The subsidy is usually funded by the seller, builder, or lender credit at closing, though a buyer can pay for it. The calculator totals the cost so you can negotiate who funds the escrow.
Will the borrower qualify at the lower payment?
Usually no. Most lenders qualify the borrower at the full note rate because the buydown is temporary. Plan your budget around the permanent payment before leaning on the reduced year-one payment.
Is this the same as discount points?
No. Discount points permanently lower the interest rate for the life of the loan. A temporary buydown only reduces the payment during the buydown period and then reverts to the note rate.
Related Calculators
Mortgage Points Calculator
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Mortgage Calculator
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Closing Cost Calculator
Understand how seller credits are typically allocated between buydown funds, closing costs, and rate buydowns.
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