Definition
A promissory note is a legal document where a borrower promises in writing to repay a specific amount of money to a lender under agreed-upon terms. This document serves as formal evidence of the debt and includes key details like the loan amount, interest rate, payment schedule, and consequences of default.
The promissory note acts as an IOU with legal teeth — it's enforceable in court if the borrower fails to repay as promised. Unlike a simple handshake agreement, this written contract protects both parties by clearly outlining everyone's obligations. The note typically specifies whether payments are interest-only or include principal, when the full balance is due, and what happens if payments are missed.
For most home loans, the promissory note works alongside a deed of trust or mortgage, which gives the lender the right to foreclose on the property if you don't pay. Think of the promissory note as your personal promise to pay, while the deed of trust secures that promise with your home as collateral.
How It Applies to HELOCs
With a HELOC, your promissory note will reflect the unique structure of this type of credit line. During the draw period (typically 10 years), your note may allow interest-only payments on whatever amount you've borrowed, with the interest rate adjusting monthly or quarterly based on market conditions.
The promissory note will clearly spell out what happens when your draw period ends and you enter the repayment phase. At this point, you can no longer borrow additional funds, and your payments will include both principal and interest to fully repay the balance over the remaining loan term (usually 10-20 years). Since HELOC rates are variable, your note will explain how rate changes affect your payment amounts.
How It Applies to DSCR Loans
For DSCR loans, the promissory note reflects that you're qualifying based on your property's rental income rather than personal income documentation. The note will specify the loan terms typical for investment properties, such as higher interest rates (often 1-2% above residential rates) and shorter amortization periods.
Since many real estate investors hold properties in LLCs, the promissory note may be signed by you personally even if the LLC owns the property. This means you're personally guaranteeing the debt. The note will also outline any prepayment penalties, which are common with investor loans, and specify whether the loan has a balloon payment due after a certain period (like 5-7 years).
Example Calculation
HELOC Promissory Note Example: Sarah has a $400,000 home and gets approved for a $200,000 HELOC at 8.5% variable rate.
Draw Period (Years 1-10): Interest-only payments
- She borrows $100,000 for renovations
- Monthly interest payment: $100,000 × 8.5% ÷ 12 = $708
Repayment Period (Years 11-25): Principal + interest
- Remaining balance: $100,000
- 15-year amortization at 8.5%
- Monthly payment: $984 (includes $708 interest + $276 principal)
Her promissory note specifies that if rates increase to 9.5%, her interest-only payment would rise to $792/month, and her repayment period payment would increase to $1,044/month.
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