Promissory Note

A Promissory Note in the United States records a borrower's unconditional promise to repay a stated sum to the lender on agreed terms.

The enforceability of promissory notes is well established in American commercial law, with UCC Section 3-104 defining the essential requirements: the note must be in writing, signed by the maker, contain an unconditional promise to pay a fixed amount, be payable on demand or at a definite time, and be payable to order or to bearer. Meeting these requirements elevates the document from a simple IOU to a negotiable instrument with enhanced legal protections for the holder.

Promissory notes are classified as either secured or unsecured. A secured note is backed by collateral pledged under a separate security agreement governed by UCC Article 9, giving the lender the right to seize and sell the collateral upon default. An unsecured note relies solely on the borrower's personal promise to repay, making it riskier for the lender but simpler to execute. Unlike a complete loan agreement, which is a bilateral contract with covenants, representations, and conditions, a promissory note is the maker's unilateral promise to pay, though the two documents are frequently used together in larger transactions.

Personal loans between family members and friends are the most common use case. Without a written promissory note, courts may presume that a money transfer was a gift rather than a loan, leaving the lender with no legal basis for repayment. The IRS also requires that loans between related parties charge at least the Applicable Federal Rate (AFR) under IRC Section 7872, and a promissory note documenting the interest rate prevents the IRS from imputing taxable interest income to the lender.

Business financing transactions rely heavily on promissory notes. Angel investors funding startups, businesses extending credit to customers, employers providing employee advances, and shareholders lending money to their corporations all use promissory notes to formalize the debt obligation and establish enforceable repayment terms.

Seller-financed real estate transactions, where the property seller acts as the lender, are structured around promissory notes secured by a deed of trust or mortgage. Down payment loans between family members helping first-time homebuyers similarly require promissory notes for both legal enforceability and mortgage lender compliance. Private student loans, equipment financing arrangements, and short-term bridge loans between businesses all depend on properly drafted promissory notes to establish clear payment obligations and default remedies.

The principal amount must be stated in both numerical and written form to prevent ambiguity. The interest rate must comply with state usury laws, which vary significantly: California caps personal loan interest at 10% per annum (Cal. Const. Art. XV, Section 1), while New York's civil usury limit is 16% (NY Gen. Oblig. Law 5-501) and criminal usury applies above 25%. Charging interest above the state usury ceiling can void the note entirely and expose the lender to statutory penalties.

The repayment schedule defines whether the note is payable in a lump sum at maturity, in equal monthly installments (amortized), as interest-only payments with a balloon payment at maturity, or on demand. The maturity date establishes when the full remaining balance becomes due regardless of the installment schedule.

Late payment provisions specify penalty amounts or percentages for overdue installments, typically structured as a percentage of the missed payment (commonly 5%) or a flat fee assessed after a grace period. The acceleration clause permits the lender to demand immediate payment of the entire outstanding balance upon borrower default, rather than suing for each missed payment individually.

For secured notes, the collateral must be described with specificity, including serial numbers, VINs, property addresses, or account numbers as applicable. Prepayment terms should state whether early repayment is permitted without penalty. A governing law clause, default remedies, waiver of presentment and demand (standard UCC language), and the maker's signature complete the essential elements.

The holder-in-due-course doctrine under UCC Article 3 is one of the most commercially significant aspects of the promissory note. Under UCC Section 3-302, a holder in due course is a party who takes a negotiable instrument for value, in good faith, and without notice of any claim or defense. A holder in due course takes the note free of most personal defenses the maker might raise — including failure of consideration, fraud in the inducement, and breach of contract — leaving only so-called real defenses available (infancy, duress, illegality, fraud in the factum, discharge in insolvency, and the statute of limitations) under UCC Section 3-305(b). This doctrine was squarely at issue in Triffin v. Dillabough, 448 Pa. Super. 72 (1996), where the Superior Court of Pennsylvania confirmed that a commercial check-cashing company that acquired dishonored money orders for value without notice of defects qualified as a holder in due course and was entitled to enforce the instruments against the maker despite the underlying transaction defects. Parties who sign a promissory note that may be transferred should understand that subsequent holders may enjoy stronger enforcement rights than the original payee, making it critical to document all defenses to payment before signing.

A United States Promissory Note is the most common private lending instrument in American commerce, yet it is also one of the most frequently mis-drafted, creating unenforceable debts or unexpected legal exposure for both lenders and borrowers. The following are the most common mistakes made in drafting and executing promissory notes under US law.

1. Failing to state the promise as unconditional. UCC Section 3-104 defines a negotiable instrument as containing an unconditional promise to pay a fixed amount of money. A promise conditioned on business performance, project completion, or any other event falls outside UCC Article 3 and is treated as a simple contract, losing the holder-in-due-course protections and simplified enforcement remedies that make promissory notes valuable. Correct approach: state the promise in absolute terms — "the Maker unconditionally promises to pay" — without any conditions or qualifications. Consequence: the note loses its status as a negotiable instrument under UCC Article 3, and the payee must rely on general contract law to enforce it.

2. Charging an interest rate that violates state usury limits. Usury laws vary dramatically by state: California caps personal loan interest at 10% per annum under Article XV, Section 1 of the California Constitution; New York's civil usury ceiling is 16% per annum (General Obligations Law Section 5-501) with criminal usury above 25%; Texas sets a maximum of 18% for consumer loans under the Texas Finance Code. Charging above the applicable usury ceiling can render the note entirely void — not merely the excess interest, but the entire note — in some states. Correct approach: verify the applicable usury ceiling before setting the interest rate, and confirm the rate is within the lawful maximum for the governing state and loan type. Consequence: a usurious note may be void and unenforceable, and the lender may face civil and criminal penalties.

3. Not complying with IRS Applicable Federal Rate (AFR) requirements for related-party loans. When a promissory note between family members or related corporations charges zero interest or an interest rate below the AFR published by the IRS under IRC Section 1274(d), the IRS imputes interest income to the lender and a gift to the borrower under IRC Section 7872 — regardless of what the note actually says. Correct approach: charge at least the current AFR (published monthly by the IRS) for the term of the loan. Consequence: the lender faces phantom income tax on imputed interest not actually received; the transaction may be recharacterized as a gift with gift tax implications.

4. Leaving the maturity date or repayment schedule blank or ambiguous. A note that lacks a clear maturity date or repayment schedule creates immediate confusion about when the debt is due and when the statute of limitations begins to run. Under most state statutes of limitations — typically six years for written contracts — the clock begins running from the date payment was due. Correct approach: specify either a fixed maturity date or a clear instalment schedule with payment amounts and due dates. Consequence: uncertainty about the limitation period may bar enforcement earlier than the lender expected, leaving an unrecoverable debt.

5. Omitting the acceleration clause. Without an acceleration clause, a lender whose borrower misses one instalment payment cannot demand the full outstanding balance — the lender must sue for each missed payment individually, creating a recurring litigation burden for every default. Correct approach: include an acceleration clause stating that upon default, the entire outstanding balance becomes immediately due and payable at the lender's option. Consequence: the lender must file separate suits for each missed payment rather than a single action for the full debt.

6. Failing to perfect a security interest by filing a UCC-1 financing statement. A promissory note secured by collateral (equipment, inventory, accounts receivable, or vehicles) protects the lender only if the security interest is perfected. Under UCC Article 9, perfection of a security interest in most personal property requires filing a UCC-1 financing statement with the Secretary of State in the debtor's jurisdiction. An unperfected security interest loses priority to a perfected security interest, a lien creditor, and a trustee in bankruptcy. Correct approach: file a UCC-1 financing statement with the appropriate state Secretary of State within ten days of the note's execution. Consequence: the lender loses its priority as a secured creditor in a bankruptcy proceeding, recovering only as a general unsecured creditor.

7. Not including a waiver of presentment and demand. Under UCC Section 3-501, a holder who wants to enforce a promissory note must generally make a formal demand for payment. Many promissory note disputes involve the maker arguing that no formal demand was made. Correct approach: include a standard waiver clause: "the Maker hereby waives presentment, demand, protest, and notice of dishonor." Consequence: the payee may be required to make formal demand as a condition of enforcement, adding procedural steps and cost to an otherwise straightforward debt collection.

8. Using oral modifications after execution. Under UCC Section 3-117, a written promissory note may be discharged by an agreement between the parties, and many makers argue that the parties orally agreed to extend the due date or reduce the interest rate. Oral modifications to a written promissory note may be enforceable if supported by consideration, creating uncertainty about the actual terms of the obligation. Correct approach: include a no-oral-modification clause and require any changes to the note to be in writing and signed by both parties. Consequence: disputed oral extensions or modifications create factual issues that require expensive litigation to resolve.

9. Losing the original signed note. Under UCC Section 3-309, enforcing a lost, destroyed, or stolen promissory note requires the claimant to prove the terms of the note, the claimant's right to enforce it, and the reason it cannot be produced. Courts may require the claimant to post a bond. Correct approach: retain the original signed note in a secure location; if a copy is provided to the maker, mark it clearly as "COPY — NOT NEGOTIABLE." Consequence: lost notes are difficult and expensive to enforce, and may require court proceedings before any recovery is possible.

10. Not specifying the governing law when the parties are in different states. When the maker and payee reside in different states, conflict-of-laws issues arise regarding which state's usury laws, enforcement procedures, and limitation periods apply. Correct approach: include a governing law clause specifying the state whose law governs the note. Choose a state with clear usury limits consistent with the agreed interest rate. Consequence: a court in the maker's state may apply its own usury law and void the interest rate, or apply a shorter limitation period than the lender expected.