A secured promissory note is a written promise to repay borrowed money that is backed by a specific asset the lender can seize and sell if the borrower defaults. It is really two documents working together: the note itself creates the debt, and a companion security agreement gives the lender a legal claim, or lien, on the pledged property. That pairing is what separates a secured loan from a handshake IOU, and it is the reason secured notes carry lower rates than unsecured ones.
Getting the paperwork right matters more than most private lenders realize. A missing clause, a vague collateral description, or a skipped filing can leave you standing in line behind other creditors when the borrower stops paying.
What the Note Itself Must Say
To qualify as a negotiable instrument under UCC Article 3, a promissory note must contain an unconditional promise to pay a fixed amount of money, be payable on demand or at a definite time, and carry no side obligations beyond payment.1Legal Information Institute. UCC – Article 3 – Negotiable Instruments Negotiability lets you sell or transfer the note later, which is routine in secondary markets. Even when transfer is not the plan, meeting those benchmarks keeps the note enforceable in court.
Beyond the legal minimum, a well-drafted note pins down several specifics:
- The exact principal amount and the annual interest rate. Every state caps interest through usury laws, and a rate above the ceiling can wipe out the entire interest charge. Check the law of the state that governs the note before you set the number.
- The payment schedule and maturity date. Monthly installments, quarterly payments, a single balloon, or some mix. A note with no maturity date is treated as payable on demand, meaning you can call it in at any point.
- Late fees. A flat charge or percentage that kicks in after a grace period. Five percent of the overdue installment is common in commercial notes, though consumer transactions often face lower state ceilings.
- An acceleration clause. This lets you declare the entire remaining balance due after a default. Without it, you can only sue for the individual missed installments. For real-estate-backed notes, acceleration is typically a prerequisite to foreclosure. Most commercial agreements make it optional so the lender has room to negotiate a workout first.
Nobody is liable on a negotiable instrument unless they signed it. That matters most with co-borrowers. If two people sign a note containing joint-and-several-liability language, you can pursue either one for the full balance, and a private arrangement between them, such as a divorce decree, does not change what they owe you. The only ways off the note are refinancing, a lender-approved modification, or full payoff.
Describing the Collateral
The security agreement has to describe the pledged property clearly enough that someone reading the document can identify exactly what is covered. Under UCC Article 9, a description is sufficient if it “reasonably identifies” the collateral, and the code allows a specific listing, a category of assets, a quantity, or a formula. What the code prohibits is catch-all language. “All the debtor’s assets” or “all the debtor’s personal property” will not hold up.
In practice, be as specific as the asset allows. For a vehicle, include make, model, year, and VIN. For industrial equipment, use manufacturer name, model number, and serial number. For accounts receivable, describe them by category and identify the account debtors or the range of obligations covered. A single transposed digit in a serial number can defeat enforcement later, so proofread these details closely.
Specificity also affects priority disputes. If two creditors both claim the same property and one described it precisely while the other used a vague category, the specific description makes the stronger case in court. That precision also protects you if the borrower files for bankruptcy and a trustee starts picking apart every creditor’s documentation.
Purchase Money Security Interest
When you finance the borrower’s purchase of specific goods and take a security interest in those same goods, the resulting lien is a purchase money security interest, or PMSI. A PMSI in non-inventory goods beats any earlier-filed security interest in the same collateral, as long as it is perfected when the borrower takes delivery or within 20 days after.2Legal Information Institute. UCC 9-324 – Priority of Purchase-Money Security Interests This is how an equipment financer can leapfrog a bank that already has a blanket lien on the borrower’s assets. For inventory, the rules are tighter: the PMSI must be perfected before the borrower receives the goods, and you must send written notice to every existing secured party filed on that type of inventory.
Preparing and Signing the Documents
A secured loan involves at least two documents, the promissory note and the security agreement, and often a UCC-1 financing statement for the public filing step. Before drafting, gather:
- Full legal names as they appear on government-issued ID for individuals or on formation documents for a business. A name mismatch between the security agreement and the financing statement can make the filing unsearchable, which effectively destroys your priority.
- Current addresses for both parties, needed for legal notices and any future service of process.
- Collateral identifiers such as serial numbers, VINs, or account numbers.
- Loan terms. Every figure in the security agreement must match the note exactly. A discrepancy gives a court or bankruptcy trustee an opening to challenge the lien.
When the borrower signs the security agreement, that signature automatically authorizes you to file the financing statement covering the described collateral.3Legal Information Institute. UCC 9-509 – Persons Entitled to File a Record The borrower does not sign the UCC-1 separately. Notarization is not required for most UCC filings, though it is common for promissory notes, especially when a mortgage or deed of trust will be recorded at the county level.
Federal law gives electronic signatures the same legal weight as handwritten ones for any transaction affecting interstate commerce, so a note or security agreement signed through a reputable e-signature platform is enforceable.4Office of the Law Revision Counsel. 15 USC 7001 – General Rule of Validity
Making the Lien Stick: Perfection
A security interest that exists only between borrower and lender will not protect you against other creditors or a bankruptcy trustee. Perfection is the step that makes the lien enforceable against the rest of the world.
For most personal property, perfection means filing a UCC-1 financing statement with the appropriate central filing office, usually the Secretary of State. Filing fees typically run from about $5 to $60 depending on the state and whether you file online or on paper. Some states no longer accept paper. The financing statement names the debtor, the secured party, and the collateral, and the public record puts other potential creditors on notice.
Priority among competing creditors follows a first-to-file-or-perfect rule: whichever secured party files or perfects first wins, regardless of when the security agreement was signed. Experienced lenders file the UCC-1 the same day the loan closes, or even before the borrower takes possession.
Real estate follows a different path. Instead of a UCC-1, you record a mortgage or deed of trust with the county clerk where the property sits. Recording fees vary by county and usually combine a base charge with a per-page fee. The county then assigns a book-and-page or instrument number that becomes the official record of the lien.
Whether you file a UCC-1 or record a real-estate instrument, keep the stamped copy or electronic confirmation. That document proves your priority date and is the first thing you will need if you ever have to enforce.
Five-Year Expiration
A UCC-1 financing statement does not last forever. It expires five years after filing.5Legal Information Institute. UCC 9-515 – Duration and Effectiveness of Financing Statement If the loan is still outstanding as the five-year mark approaches, file a continuation statement during the six months before expiration. A timely continuation extends the filing another five years, and you can keep renewing indefinitely. Miss the window and the filing lapses, dropping your interest behind every other creditor who is still perfected. Calendar the expiration date the day you file.
Enforcing the Note After Default
Default is when a secured note earns its keep. Your options split into two paths: sell the collateral, or keep it.
Selling the Collateral
After default, a secured party can take possession of the collateral and sell it at a public or private sale.6Legal Information Institute. UCC 9-610 – Disposition of Collateral After Default Every aspect of the sale, including method, timing, price, and terms, must be “commercially reasonable.” Dumping equipment at a fire-sale price to a friend invites a lawsuit from the borrower. Commercially reasonable usually means advertising the sale, using a recognized auction platform, or selling through normal trade channels at market prices.
Before disposing of collateral, you must send the borrower and any other secured parties a reasonable advance notification describing what will be sold, when, and how.7Legal Information Institute. UCC 9-611 – Notification Before Disposition of Collateral Skipping the notice can expose you to liability for the borrower’s actual damages.
Sale proceeds are applied in order: first to your reasonable expenses for repossession and sale, including attorney fees if the agreement allows them; then to the outstanding debt; then to any subordinate lienholders who made a timely demand. Any surplus goes back to the borrower. If the sale does not cover the full debt, the borrower still owes the deficiency.8Legal Information Institute. UCC 9-615 – Application of Proceeds of Disposition Deficiency judgments are where borrowers get blindsided: they lose the asset and still owe money.
Keeping the Collateral
Instead of selling, you can propose to keep the collateral in full or partial satisfaction of the debt. The borrower must consent in writing after the default, and no subordinate lienholder can object within 20 days of receiving your proposal.9Legal Information Institute. UCC 9-620 – Acceptance of Collateral in Full or Partial Satisfaction If you accept it in full satisfaction, the debt is wiped out entirely, even if the asset is worth less than the balance. In a consumer transaction, partial satisfaction, where you keep the collateral but the borrower still owes a balance, is prohibited. This route, sometimes called strict foreclosure, works best when the collateral’s value roughly equals the debt and neither side wants the hassle of a sale.
Tax Reporting for Private Lenders
Interest earned on a secured promissory note is taxable income, and the IRS expects you to report it even if you are not a bank. If you receive $10 or more in interest from a single borrower during a calendar year, you must file Form 1099-INT.10Internal Revenue Service. Instructions for Forms 1099-INT and 1099-OID Below that threshold, the income is still taxable; only the filing requirement for the form itself is triggered at $10.
Private loans between family members or business associates trigger a separate trap called imputed interest. If you charge a rate below the IRS Applicable Federal Rate, the IRS treats the forgone interest, meaning the difference between what you charged and the AFR, as though you had given it to the borrower and the borrower had paid it back to you.11Office of the Law Revision Counsel. 26 USC 7872 – Treatment of Loans With Below-Market Interest Rates Both parties get taxed on interest that was never actually paid. For a short-term loan in mid-2026, the AFR is roughly 3.8% annually, with mid-term and long-term rates higher.12Internal Revenue Service. Rev. Rul. 2026-7 – Applicable Federal Rates
A narrow exception exists: gift loans between individuals where the total outstanding balance stays at or below $10,000 are exempt from the imputed-interest rules, so long as the loan is not used to buy income-producing assets.11Office of the Law Revision Counsel. 26 USC 7872 – Treatment of Loans With Below-Market Interest Rates The same threshold applies to employer-employee and corporation-shareholder loans unless tax avoidance is a principal purpose. For any private loan above $10,000, charge at least the AFR to avoid phantom income on both sides.