An unsecured promissory note is a written promise to repay a loan that isn’t backed by any collateral. If the borrower stops paying, the lender has nothing to repossess. Recovery runs entirely through a lawsuit, which is why unsecured notes carry higher interest rates than secured loans and need to be drafted carefully from the start.
How It Differs From a Secured Note
The defining feature is what happens at default. A secured note ties the debt to a specific asset: pledge a car or a piece of equipment, miss payments, and the lender can take the asset, sell it, and apply the proceeds to the balance. An unsecured note strips that away. The lender’s only path to recovering money is suing the borrower, winning a judgment, and chasing assets through the court system.
That one difference drives everything else. Lenders who accept unsecured notes look harder at credit history, income, and existing debts before agreeing. They charge more to compensate for the risk. A borrower who could get a secured loan at 6% might see 10% or more on an unsecured note of the same size. In exchange, the borrower gets speed and simplicity. There’s no appraisal, no lien filing, and no collateral inspection. The note can be drafted, signed, and funded in a single meeting.
If the borrower later files bankruptcy, the gap widens. Secured creditors get paid first out of the collateral they hold a claim on. Unsecured creditors stand in line with credit card companies, medical providers, and everyone else, competing for whatever is left. That lack of priority is the single biggest risk of holding an unsecured note.
What a Valid Note Must Include
A promissory note is only as enforceable as the language inside it. Missing a key term doesn’t just create confusion; it can make the whole note unenforceable in court. At a minimum, every unsecured promissory note should spell out:
- The principal amount being lent, as an exact dollar figure.
- The interest rate, whether it’s fixed or variable, and whether interest is calculated simple or compound.
- The repayment schedule, whether that’s monthly installments, quarterly payments, or a single lump sum at the end.
- The maturity date by which all principal and interest must be paid.
- Full legal names and addresses of both lender and borrower.
- Default provisions, including what counts as a default, whether there’s a cure period, and whether the full balance accelerates after a missed payment.
- Prepayment terms, including any penalty for paying early.
- The state law that governs disputes.
Both parties have to sign. An unsigned promissory note is a piece of paper describing a hypothetical loan. The signatures turn it into a binding contract.
Notarization isn’t required by federal law, but it’s one of the smartest things a lender can insist on. Under the Federal Rules of Evidence, a document carrying a notary’s certificate of acknowledgment qualifies as self-authenticating and can be admitted in court without calling a witness to prove the signatures are real. Skip notarization and you may end up tracking down a witness or paying a handwriting expert to prove the borrower actually signed, which adds cost and delay to any collection suit.
Interest Rate Rules You Can’t Ignore
Private loans don’t operate in the free-market space most people assume. The IRS watches whether the rate on a private note is high enough, and states cap how high it can go.
The AFR and Imputed Interest
The IRS publishes Applicable Federal Rates every month, broken out by loan duration. For April 2026, the annual AFRs are 3.59% for short-term loans (three years or less), 3.82% for mid-term loans (over three years but not more than nine), and 4.62% for long-term loans (over nine years).1Internal Revenue Service. Applicable Federal Rates If a private note charges less than the applicable AFR, the IRS treats the difference between what was charged and what should have been charged as taxable income to the lender, and in family-loan situations as a gift from lender to borrower.2Office of the Law Revision Counsel. 26 USC 7872 – Treatment of Loans With Below-Market Interest Rates
There’s one practical exception. Loans of $10,000 or less between individuals are exempt from the imputed interest rules, as long as the borrower doesn’t use the money to buy income-producing assets like stocks or rental property.2Office of the Law Revision Counsel. 26 USC 7872 – Treatment of Loans With Below-Market Interest Rates Above that threshold, charging at least the AFR keeps the IRS from recharacterizing the transaction.
If the lender later forgives any part of the note, the forgiven amount is treated as a gift. For 2026, the annual gift tax exclusion is $19,000 per recipient.3Internal Revenue Service. Frequently Asked Questions on Gift Taxes Forgiving up to that amount in a year triggers no gift tax and no filing. Above $19,000, the lender has to file Form 709, though no tax is actually owed until the lender passes the $15,000,000 lifetime exemption.4Internal Revenue Service. What’s New – Estate and Gift Tax Married couples who both consent can exclude up to $38,000 per recipient per year.
State Usury Caps
Every state limits the interest rate a private lender can charge. The ceilings vary a lot. Some states cap non-bank lending as low as 6% to 10%, while others allow rates above 20%. Charging more than your state permits can void the interest entirely, and in some states the lender forfeits the principal too. Check your state’s usury statute before setting a rate. Getting it wrong doesn’t just shrink your return; it can wipe out your right to collect.
What Happens If the Borrower Doesn’t Pay
Without collateral to seize, collection runs through the court system from start to finish. The process is slower and less certain than foreclosing on a house or repossessing a car.
The usual first step is a formal demand letter telling the borrower they’ve missed a payment and are in default. If the note has a cure period, the borrower gets a short window to catch up. If the note has an acceleration clause and the default isn’t cured, the lender can declare the entire remaining balance due immediately instead of chasing each installment as it comes due. The demand letter puts the borrower on notice and creates a paper trail for court.
If the borrower ignores the letter, the lender files a civil suit for a money judgment. The case is usually straightforward when the note is well-drafted and properly signed: present the note, show the default, and ask the court to order payment. Once a judgment is entered, the debt turns from a private agreement into a court-ordered obligation, which unlocks enforcement tools the lender didn’t have before.
A judgment by itself doesn’t put money in anyone’s pocket. The lender has to use state enforcement mechanisms to actually collect. The common tools are wage garnishment, which orders the borrower’s employer to withhold part of each paycheck and send it to the lender subject to federal and state caps;5Office of the Law Revision Counsel. 15 USC 1673 – Restriction on Garnishment a bank levy, which freezes and seizes funds in the borrower’s accounts above state exemption floors; and a judgment lien recorded against the borrower’s real property, which doesn’t force a sale but has to be paid off before the property can be sold or refinanced.
The full cycle from demand letter to actual cash in hand can easily take a year or longer. That timeline is the practical cost of lending without collateral.
If the Borrower Files Bankruptcy
Chapter 7 is the lender’s worst case. A Chapter 7 discharge eliminates most unsecured debts, and a standard promissory note between private parties sits squarely in that category.6Office of the Law Revision Counsel. 11 USC 727 – Discharge The lender gets whatever the bankruptcy trustee distributes from the borrower’s non-exempt assets, which in many Chapter 7 cases is nothing.
There are narrow exceptions. A debt obtained through fraud, false pretenses, or a materially false written financial statement isn’t dischargeable.7Office of the Law Revision Counsel. 11 USC 523 – Exceptions to Discharge If the borrower lied about income or assets to get the loan, the lender can challenge the discharge. But the burden of proving the fraud sits with the lender, and ordinary inability to repay doesn’t qualify.
The Statute of Limitations Clock
Every state imposes a deadline for suing to collect on a defaulted promissory note. Once it passes, the debt still exists on paper but the lender loses the right to enforce it. For written contracts and promissory notes, the window is typically three to six years, with a few states allowing longer. The clock usually starts from the date of the first missed payment, or from the date the lender accelerates the full balance if the note has an acceleration clause. Sitting on a defaulted note for years is how lenders lose their only real remedy.
When the Note Might Be a Security
One boundary worth knowing: a promissory note sold to outside investors can be classified as a security under federal law, which triggers SEC registration requirements and real liability if the seller didn’t comply. The Supreme Court sorts commercial notes from investment notes using a “family resemblance” test.8Justia Law. Reves v. Ernst and Young, 494 US 56 (1990) If you’re writing a note between two individuals or a small-business loan with a personal guarantee, this isn’t your problem. If someone is pitching you a promissory note as an “investment” with above-market returns and claims of guarantees or insurance, the SEC has flagged exactly that pattern as one of the most common forms of securities fraud.9U.S. Securities and Exchange Commission. Promissory Notes – Investor Alert
Where These Notes Make Sense
The most common setting is a loan between family members or friends. The existing relationship substitutes for the credit analysis a bank would do, and the written note substitutes for a handshake. Even between people who trust each other completely, putting the loan in writing prevents disputes about when payments are due and how much interest is being charged. It also protects the lender’s ability to deduct a bad debt loss on their taxes if the borrower never repays, since the IRS wants documentation that a real loan existed. Family lenders should remember the imputed interest rules: a zero-interest note to a relative for more than $10,000 will generate phantom taxable income, so pegging the rate to the AFR avoids an unnecessary tax headache.
Small businesses without hard assets like real estate or expensive equipment often use unsecured notes for capital. These are frequently backed by the owner’s personal guarantee, meaning the owner is personally on the hook if the business can’t pay.10U.S. Securities and Exchange Commission. Promissory Note Secured by Personal Guarantee A personal guarantee turns a business-only problem into personal liability, so owners should understand that their savings, home equity, and other assets can be reached if the business fails.
Short-term bridge financing is the third common fit. When the borrower expects cash soon but needs money now, an unsecured note keeps the risk window small and closes in days rather than weeks. The borrower keeps assets free of liens and gets fast capital. The lender takes on more risk and charges a higher rate for it. For smaller loans, short time horizons, and relationships where trust is high, the unsecured note is often the more practical instrument.