ONEDEAL EDUCATIONAL GUIDE · SEPTEMBER 9, 2026
Hypothetical interest-only seller note
- Principal / annual rate
- $50,000 / 6%
- Monthly interest
- $50,000 × 6% ÷ 12 = $250
- Interest paid over 60 months
- $15,000
- Principal due after five years
- $50,000
- Bank + seller monthly payment
- $1,000 + $250 = $1,250
$450 modeled monthly cash flow does not cover an $833.33 monthly balloon savings target.
Amortization and maturity are different
Amortization describes how scheduled payments reduce principal. Maturity is when the remaining debt becomes due. A note can use a long amortization schedule but mature much sooner, leaving a balloon balance. An interest-only note does not reduce principal through its regular interest payments.
The example uses a $50,000 seller note at a fixed 6% annual interest rate with monthly interest-only payments and principal due after five years. It is a hypothetical schedule, not an offer or a recommended financing structure.
A small payment can hide a large payoff
Interest-only payments on this note are $250 per month. After 60 payments, $15,000 of interest has been paid, but the $50,000 principal still needs to be repaid. Paying interest is not the same as building a principal repayment fund.
With $1,700 monthly NOI before debt and a separate $1,000 bank payment, combined debt service is $1,250. That leaves $450 before any costs excluded from NOI. Accumulating $50,000 over 60 months would require about $833.33 per month without investment earnings—more than that modeled cash flow.
Plan for the obligation, not an assumed refinance
A future refinance or sale is not guaranteed. Model lower property value, tighter lending terms and insufficient cash at maturity. Different repayment terms, fees or prepayment rules change the calculation.
- Ask qualified legal and lending professionals to review the written structure, title and existing-loan restrictions.
- Confirm the exact interest, amortization, maturity and balloon terms.
- Include taxes, insurance, operating reserves and all debt obligations in the property budget.
Examples are hypothetical educational estimates, not market data, loan approvals or individualized investment, tax or legal advice. Verify property facts and financing terms with appropriate professionals.
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