How to Fill Out and Sign a Promissory Note Form

To fill out a promissory note, you work through a short list of fields in order: the date and parties, the principal amount, the interest rate, the repayment schedule, default and late-fee terms, governing law, and signatures. Each field has a correct way to complete it, and a few — the interest rate especially — have legal limits you have to check before writing anything in. Get those right and the signed note becomes a binding contract that a court can enforce.

Pick the Right Type of Note First

The template you use depends on how the loan will be repaid and whether anything backs it up. Decide this before you touch any blanks.

An installment note has the borrower make regular payments (usually monthly) that chip away at principal and interest until the balance hits zero on a set maturity date. It’s the most common structure for personal and real estate loans because both sides know exactly what’s owed and when. A demand note has no fixed schedule — the lender can call the full balance due at any time with written notice. Useful for short-term or informal loans, but it gives the borrower almost no planning certainty. A balloon note mixes the two: small periodic payments (often interest-only), then the remaining principal in one lump sum on the maturity date.

Then decide whether the note is secured or unsecured. A secured note ties the debt to specific collateral — a car, equipment, real estate. If the borrower defaults, the lender has a legal right to seize and sell that property. A separate security agreement accompanies the note and spells out which assets are pledged. An unsecured note has no collateral behind it; the lender’s only remedy on nonpayment is to sue the borrower personally. Unsecured notes are simpler to draft but riskier for the lender, which is why they’re more common for smaller loans between people who already trust each other.

What the Note Has to Contain

A promissory note doesn’t need to be long, but it does need to cover certain ground. Missing even one key term can leave the note ambiguous enough to fight over, or unenforceable entirely.

Parties: full legal names and current addresses of the lender (payee) and borrower (maker). If either party is a business, use the registered entity name, not just the owner’s name.
Principal amount: the exact sum borrowed, written in both numbers and words — “$25,000 (Twenty-Five Thousand Dollars)” — so there’s no dispute if one gets altered.
Interest rate: the annual percentage rate, how it’s calculated (simple or compound), and the compounding period if applicable.
Repayment terms: each payment’s amount, frequency, due date, and the final maturity date.
Default and acceleration: what counts as a default (missed payment, bankruptcy filing, breach of another condition) and what happens when one occurs. An acceleration clause lets the lender demand the entire remaining balance immediately rather than waiting for each installment to come due.¹
Late fees: the penalty for a late payment, usually a flat dollar amount or a percentage of the overdue installment. Many notes also include a grace period, commonly 10 to 15 days, before the late fee kicks in.
Governing law: the state whose laws control the note. This determines usury limits, collection rules, and which courts have jurisdiction if things go sideways.
Signatures: the borrower must sign. Most templates include a signature line for the lender too, and adding one is good practice because it shows both parties agreed to the same terms.

If you want the note to qualify as a negotiable instrument under UCC Article 3 — meaning the lender can transfer it to a third party — it must contain an unconditional promise to pay a fixed amount of money, be payable on demand or at a definite time, and not require any action beyond payment of money.²

Set the Interest Rate Within Legal Limits

Every state caps the interest a private lender can charge, and exceeding that cap — the usury limit — can void the interest entirely, expose the lender to penalties, or trigger criminal liability. Caps vary widely. Some states set a default rate as low as 5% or 6% for loans without a written agreement; others allow rates above 20% for certain written contracts. The applicable rate depends on which state you designate as governing law, the type of loan, and whether the lender is a licensed institution or a private individual.

Check your state’s usury statute before writing the rate into the template. If the note names a rate above the cap, a court could refuse to enforce the interest provision, and in some states the borrower can recover penalties on top of the excess interest already paid.

The IRS Floor: Applicable Federal Rates

State usury law sets the ceiling. Federal tax law sets the floor. If you charge interest below the IRS Applicable Federal Rate, the IRS treats the “forgone interest” — the difference between what you charged and the AFR — as a taxable event. For gift loans between family members, that gap is treated both as a gift from lender to borrower and as imputed interest income to the lender.³

The AFR changes monthly and comes in three tiers based on the loan’s length. For June 2026 with annual compounding, the short-term rate (three years or less) is 3.85%, the mid-term rate (over three years up to nine) is 4.13%, and the long-term rate (over nine years) is 4.87%.⁴

Two exceptions soften smaller loans. If the total outstanding balance between you and the borrower stays at or below $10,000, Section 7872 doesn’t apply at all. For loans between $10,001 and $100,000, imputed interest is capped at the borrower’s net investment income for the year; if the borrower earns less than $1,000 in investment income, the imputed amount is zero.³

The annual gift tax exclusion for 2026 is $19,000 per recipient.⁵ If the forgone interest on a below-market loan stays under that threshold, the lender won’t owe gift tax, but still has to report the imputed interest as income.

Working Through the Template

With your terms decided and your rate confirmed against both the state usury cap and the AFR floor, you’re ready to populate the form. Go methodically. A missed field invites exactly the kind of ambiguity the template exists to prevent.

Start with the header: the date, the full legal names of both parties, and their addresses. The date matters because it establishes when the obligation begins and anchors every deadline in the repayment schedule. If you’re lending to or borrowing from a business, use the entity’s legal name and state of formation, not a trade name.

Enter the principal amount in both numerical and written form. Then fill in the interest rate and specify whether interest accrues simple or compound. If compound, state the compounding period (monthly, quarterly, annually). A template that leaves this ambiguous creates headaches later, because the total interest owed can differ substantially depending on method.

For the repayment section, spell out each payment’s amount, frequency, and due date. For an installment structure, include the first payment date and the final maturity date. For a balloon note, state the periodic payment amount and then separately identify the balloon payment date and expected final balance. If you’ve agreed to let the borrower direct payments toward principal first, say so. Otherwise the standard convention is that payments cover accrued interest before reducing principal.

Fill in the late fee amount or percentage, the grace period if any, and the default triggers. If the note includes an acceleration clause, the template will have a section stating that the lender can demand the full remaining balance upon default. Review it rather than relying on boilerplate: an acceleration clause the borrower didn’t expect is a fast way to land in a dispute.

Prepayment

Decide whether the borrower can pay the loan off early without penalty. Some notes charge a prepayment fee, often structured as a declining percentage of the prepaid principal — for instance, 5% in the first year, stepping down by 1% each year until it disappears.⁶ If you want to allow penalty-free early payoff, include an explicit statement to that effect. Silence on prepayment in some states means the borrower can prepay freely; in others, the opposite. Say what you mean.

If the Note Is Secured, Add a Security Agreement

If the loan is large enough to justify collateral, you need more than a single line in the note that says “secured by a 2022 Toyota Tacoma.” The note should reference a separate security agreement, and that agreement needs to describe the collateral in enough detail that a court could identify it, grant the lender a security interest in it, and authorize enforcement on default.

A security agreement must include the borrower’s grant of a security interest, a specific description of the pledged property, and a statement that the interest secures the debt evidenced by the note.⁷ Without it, the lender has a promissory note but no enforceable claim on the collateral.

Perfecting the Interest

Signing a security agreement creates the security interest between the two of you, but it doesn’t protect the lender against other creditors or a bankruptcy trustee. For that, the lender needs to perfect the interest. For most personal property, perfection means filing a UCC-1 Financing Statement with the Secretary of State in the state where the borrower is located. The filing must include the debtor’s name, the secured party’s name, and a description of the collateral, and the borrower must have authorized the filing in the security agreement.⁸

Filing fees are modest, generally $10 to $25 depending on the state. Errors in the debtor’s name can be fatal; if the name is misleading enough that a search wouldn’t turn it up, the filing may be treated as ineffective. Double-check spellings against the borrower’s legal identification before submitting.

Some collateral types work differently. A lender who holds physical possession of a negotiable instrument (like the promissory note itself) perfects by possession rather than filing.⁹ Real property collateral requires recording a deed of trust or mortgage with the county recorder, not a UCC-1.

Signing the Note

The borrower’s signature is the one non-negotiable requirement. Without it, there is no enforceable promise to repay. Both parties should sign, though. A lender’s signature confirms acceptance of the terms, which matters if the note includes obligations that run both ways, such as a commitment to release collateral after payoff.

Notarization

Most states do not require a promissory note to be notarized, but having a notary witness the signing adds a layer of protection. The notary verifies each signer’s identity, which makes it much harder for either party to later claim the signature is forged or that they never agreed to the document. Maximum notary fees for an acknowledgment vary by state, ranging from as low as $2 in a few states to $25 in others, with most falling between $5 and $15 per signature.

Witnesses

Some lenders also ask two disinterested witnesses — people who aren’t parties to the loan and have no financial stake in it — to sign the note. Witness signatures aren’t legally required for most promissory notes, but they provide additional evidence of proper execution if authenticity is ever challenged.

Electronic Signatures

The federal Electronic Signatures in Global and National Commerce Act (E-SIGN Act) makes electronic signatures legally valid for promissory notes, so you can use an e-signing platform rather than printing and mailing the document.¹⁰ One caveat: if you also have a signed paper copy, don’t destroy it until the loan is fully paid off. Keeping both prevents disputes about which document controls.

After Signing: Storage, Payments, and Payoff

The lender keeps the original signed note. This isn’t just good recordkeeping. Under UCC Article 9, physical possession of the instrument is one way to perfect a security interest in the note itself, which matters if the lender ever wants to sell or assign the debt.⁹ Store the original in a fireproof safe or safe deposit box. The borrower should keep an identical signed copy.

Both sides should track every payment in writing: date, amount, how it was applied (interest vs. principal), and remaining balance. A shared spreadsheet or payment log attached to the note works. If a dispute lands in court years later, contemporaneous records carry far more weight than anyone’s memory.

If the Borrower Defaults

If the borrower misses a payment past the grace period, the lender can charge the late fee specified in the note. If the default continues and the note contains an acceleration clause, the lender can declare the entire remaining balance due immediately.¹ On a secured note, the lender can then move to seize the collateral under the terms of the security agreement. On an unsecured note, the lender’s path is a lawsuit.

One federal protection to be aware of: if the borrower enters active-duty military service after signing the note, the Servicemembers Civil Relief Act caps interest at 6% on pre-service debts and restricts foreclosure or seizure of collateral during service and for a period afterward.¹¹

Releasing the Note After Payoff

When the borrower makes the final payment, the lender should issue a written satisfaction and release — a short document confirming the debt has been paid in full and that the borrower has no further obligation under the note. The lender should return the original note to the borrower, ideally marked “PAID IN FULL” with the date, or physically cancel it by stamping or writing across its face. If a UCC-1 financing statement was filed, the lender needs to file a termination statement with the Secretary of State to clear the public record. Skipping this leaves a cloud on the borrower’s credit and ability to use that collateral for future loans.

1
Legal Information Institute. Acceleration Clause
2
Cornell Law Institute. Uniform Commercial Code 3-104 – Negotiable Instrument
3
Office of the Law Revision Counsel. 26 USC 7872 – Treatment of Loans With Below-Market Interest Rates
4
Internal Revenue Service. Applicable Federal Rates
5
Internal Revenue Service. Frequently Asked Questions on Gift Taxes
6
Securities and Exchange Commission. Promissory Note
7
U.S. Securities and Exchange Commission. Promissory Note and Security Agreement
8
Cornell Law School. UCC Financing Statement
9
Legal Information Institute. Uniform Commercial Code 9-313 – When Possession By Or Delivery To Secured Party Perfects Security Interest Without Filing
10
Health Resources and Services Administration. Electronic Promissory Notes With Electronic Signatures
11
Military OneSource. Servicemembers Civil Relief Act