A straight note in real estate is a loan on which you pay only interest during the entire term and then owe the full original principal as a single lump sum, called a balloon payment, on the maturity date. Because none of your monthly payments touch the principal, the balance you owe on the last day is identical to the balance you owed on day one. Straight notes show up most often in commercial deals, bridge financing, and seller-financed transactions where the borrower is counting on a specific future event to generate the cash needed to retire the balance.
How the Payments Work
Every payment covers interest and nothing else. The math is simple: multiply the loan amount by the annual interest rate, then divide by 12. On a $500,000 note at 6%, that’s $2,500 per month, every month, for the life of the loan. Six months in or six years in, the principal is still $500,000.
Because no principal is being paid down, your payments don’t build equity. The only way the loan-to-value ratio improves is if the property itself appreciates. If the market goes sideways or drops, you can end up owing more than the property is worth when the balloon comes due.
The whole original principal becomes payable on the maturity date. If the note runs five years, you make 60 interest-only payments and then deliver the full principal plus any final accrued interest in one shot. Planning for that date is the single most important thing a straight-note borrower has to do.
How It Differs From a Fully Amortized Loan
A standard 30-year mortgage is fully amortized. Each monthly payment includes both interest and principal. Early on, most of the payment is interest, but the principal share grows over time until the balance reaches zero on the final payment. The debt disappears on its own schedule.
A straight note doesn’t work that way. The payment covers only the financing cost, so the balance never moves. The trade-off is a lower monthly outlay. Using the same numbers, a $500,000 amortized loan at 6% over 30 years costs roughly $3,000 a month in principal and interest. A straight note on the same terms costs $2,500. That $500 gap matters when a borrower is managing cash flow on a tight timeline.
The catch is unavoidable. The amortized borrower gradually eliminates the debt. The straight-note borrower defers all of it. When maturity arrives, the straight-note borrower has to refinance, sell, or pay from reserves. There’s no gradual path to zero.
How It Differs From an Interest-Only Mortgage
These two terms get confused constantly, and they describe different products. A typical interest-only mortgage has an initial interest-only period, usually five to ten years, and then converts into a fully amortizing loan for the remaining term. Once the interest-only window closes, payments jump because the full principal has to be repaid over a shorter amortization schedule.
A straight note never converts. You pay interest only for the entire term, and the full principal comes due as a balloon at the end. There’s no built-in amortization phase. That makes the straight note simpler as an instrument but riskier for the borrower, since the whole balance has to be addressed on a single date.
Where Straight Notes Are Actually Used
Straight notes rarely appear in traditional homebuying. Under the Consumer Financial Protection Bureau’s Qualified Mortgage rules, a loan can’t be a qualified mortgage if it includes a balloon payment; the regulation requires payment terms that fully repay the loan over the term without deferring principal. Most residential lenders won’t originate balloon-payment mortgages because non-QM loans carry greater legal exposure if a borrower later claims the lender failed to verify their ability to repay. A narrow exception exists for small creditors operating in rural or underserved areas.1Consumer Financial Protection Bureau. Small Creditors Operating in a Rural or Underserved Area
When a balloon-payment loan is issued, federal truth-in-lending rules require the lender to disclose that the loan includes a balloon payment, the maximum amount of that payment, and when it’s due. A balloon payment is defined as any payment more than twice the regular periodic payment amount.2Consumer Financial Protection Bureau. Section 1026.37 – Content of Disclosures for Certain Mortgage Transactions
Where straight notes do thrive is in short-cycle, capital-intensive deals with a specific exit in mind.
Bridge Financing
Bridge loans are short-term debt designed to cover a gap, such as buying a new property before selling an existing one, or holding a site while waiting for construction financing. Because the borrower expects to repay within months rather than decades, interest-only payments keep carrying costs low during a period when the property may produce no income. Bridge loan rates tend to run about two percentage points above the prime rate.
Seller Financing
When the seller acts as the lender, straight notes are common. The seller collects steady interest income over the term and receives a lump sum at the end. The buyer gets time to improve the property, build credit, or arrange conventional financing before the balloon comes due. These deals are negotiated directly between the parties, so terms tend to be more flexible than institutional lending would allow.
Land Acquisition and Development
Raw land generates no rental income. A developer holding a vacant parcel while pursuing permits, zoning, or construction financing doesn’t want high monthly payments eating into working capital. Interest-only structure keeps debt service minimal during the pre-development phase. Once the project reaches a revenue-producing stage or the developer secures long-term financing, the straight note gets retired.
What Happens at Maturity
The maturity date is where straight notes succeed or fail. You need a clear exit strategy well before that date, not the day the balloon comes due. There are three standard paths, plus one outcome nobody wants.
Refinancing
The most common exit is replacing the straight note with a fully amortized loan. Lenders looking at a refinance application will check the property’s current appraised value, your debt-to-income ratio, and your credit profile. A commonly used benchmark for debt-to-income is a maximum of about 43%. If property values have dropped since you took out the straight note, or if rates have risen sharply, refinancing can become expensive or unavailable. That’s the core risk of the structure: your exit depends on market conditions you don’t control.
Selling the Property
If the property has appreciated enough to cover the principal plus transaction costs, a sale is a clean exit. For developers, this is often the plan from the start: buy, improve, sell before the balloon hits. The danger is a slow market. If the property doesn’t sell before maturity, you’re back to scrambling for refinancing or an extension.
Negotiating an Extension
If neither refinancing nor a sale is realistic by maturity, some lenders will agree to extend. An extension typically involves a new agreement that pushes the maturity date out, often six months to a year, while keeping the original rate and terms. The lender may charge an extension fee or require an updated appraisal. Extensions aren’t guaranteed. A borrower who starts that conversation early has more leverage than one who waits until the last minute.
Default and Foreclosure
Failing to deliver the balloon payment on the maturity date is a default. Most straight notes contain an acceleration clause, giving the lender the right to demand immediate repayment of the entire outstanding principal plus accrued interest. Acceleration is usually a choice the lender makes rather than something that triggers automatically, and a borrower who corrects the default quickly may be able to head it off.
If the debt stays unpaid, the lender will generally initiate foreclosure to recover the balance by seizing and selling the property.3Federal Housing Finance Agency Office of Inspector General. An Overview of the Home Foreclosure Process For residential properties, federal rules generally prevent a lender from starting the legal foreclosure process until a borrower is at least 120 days behind.4Consumer Financial Protection Bureau. How Long Will It Take Before I’ll Face Foreclosure if I Can’t Make My Mortgage Payments? If the foreclosure sale doesn’t produce enough to cover the outstanding principal, the lender may be able to pursue a deficiency judgment for the shortfall, depending on state law.
Prepayment Terms
Some straight notes include a prepayment penalty, meaning the lender charges a fee if you retire the principal before maturity. Lenders include these clauses because they’ve priced the loan expecting a certain number of interest payments, and early payoff cuts that income short. Common structures include a percentage of the remaining balance (often around 2% in the first year), a lockout period during which prepayment is prohibited entirely, or reimbursement of the lender’s closing costs if the loan is paid off within a set window. Some notes carry no penalty at all. This is a negotiable term, and it’s worth pushing back on, particularly in seller-financed deals where terms are more flexible.
Tax Treatment of the Interest
The fact that a loan is interest-only doesn’t change whether the interest is deductible. What matters is how the property is used and how the loan is structured.
If the straight note is secured by your primary home or a second home and was used to buy, build, or substantially improve that residence, the interest counts as qualified residence interest. You can deduct interest on up to $750,000 of that acquisition debt ($375,000 if married filing separately). The higher $1,000,000 ceiling applies to debt incurred on or before December 15, 2017.5Office of the Law Revision Counsel. 26 USC 163 – Interest
If the property is an investment or rental, the interest is generally deductible as an investment or business expense. Rental property interest goes on Schedule E; interest on property used in a non-farm business goes on Schedule C.6Internal Revenue Service. Publication 936 – Home Mortgage Interest Deduction
One practical wrinkle: because a straight note never reduces the principal, you deduct the same interest amount every year for the life of the loan. On an amortized loan, deductible interest gradually decreases as more of each payment goes to principal. The straight note gives you a consistent annual deduction, which can simplify tax planning on investment properties.