AnyTool
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How do I write a promissory note or loan IOU for free?

Open AnyTool’s Promissory Note Generator and fill in the lender (payee) and borrower (maker) names and addresses, the PRINCIPAL amount and currency, and the INTEREST — a simple annual rate, or interest-free at 0%. Then choose the REPAYMENT structure: a single LUMP SUM due on one maturity date, equal INSTALLMENTS on a schedule (weekly, bi-weekly, monthly or quarterly) with an optional amount and count, or ON DEMAND (payable whenever the lender asks). Add an optional flat LATE FEE with a grace period, allow or restrict PREPAYMENT, toggle SECURED (which adds a security-interest clause describing the collateral) or leave it UNSECURED, name an optional CO-SIGNER, and set the governing law. A complete promissory-note template — parties, the promise to pay, interest, the matching repayment clause, late charge, prepayment, an acceleration-on-default clause, security or unsecured clause, governing law, and borrower / lender (plus optional co-signer) signature lines — is assembled instantly in Markdown, HTML and plain text with a live preview, entirely in your browser, nothing uploaded. It is a template, not legal or financial advice: interest is capped by usury laws that vary by state and country, and an unlawful rate can void the note — so check your local limits first.

  • Lump sum, installments (weekly / bi-weekly / monthly / quarterly) or on-demand repayment — the clause changes to match
  • Simple annual interest or interest-free (0%); optional honest payment estimate from principal, rate and number of payments
  • Secured (adds a collateral / security-interest clause) or unsecured; optional flat late fee, prepayment toggle and co-signer / guarantor
  • Always includes an acceleration-on-default clause and a usury-cap safeguard that reduces an over-limit rate to the highest lawful rate
  • 100% client-side — names, amounts and terms never leave your browser; copy or download .md / .html / .txt

What is

Promissory Note

A promissory note is a written, signed promise by a borrower (the maker) to repay a sum of money to a lender (the payee) on agreed terms. It typically identifies the parties, states the principal amount, sets the interest rate (or that the loan is interest-free), and defines how the loan is repaid — in a single lump sum on a maturity date, in installments on a schedule, or on demand (a note with no written payment terms is generally treated as due on demand). Notes commonly add a late charge for missed payments, a prepayment clause stating whether the borrower may pay early without penalty, and an acceleration clause that makes the whole balance due if the borrower defaults. A note can be secured — backed by collateral such as a vehicle, equipment or real estate that the lender can claim on default — or unsecured, resting only on the borrower’s personal promise. Interest is limited by usury laws that vary by jurisdiction, and charging more than the legal maximum can forfeit the interest or void the note. A generated promissory note is a template that should be checked against local usury and disclosure rules, not legal or financial advice.

Generators

Related terms

IOULoan agreementPrincipalInterest rateInstallmentLump-sum / balloon paymentSecured vs unsecured noteAcceleration clauseUsury lawCo-signer / guarantor

Frequently Asked Questions

A promissory note generally needs the lender and borrower names, the principal amount, the interest rate (or that it is interest-free), how and when it is repaid (lump sum, installments or on demand), what happens on default, the governing law, and the borrower’s signature. The lender’s signature is recommended but not always required.

At a minimum, a promissory note should identify the lender (payee) and the borrower (maker) by name, state the principal amount being borrowed, and contain a clear, unconditional promise to repay it. It should state the interest rate (or that the note is interest-free) and how interest is calculated, and it must define the repayment terms — a single lump sum due on a maturity date, equal installments on a stated schedule, or payment on demand. Most notes also describe what happens on default (late fees and acceleration of the whole balance), whether prepayment is allowed, and the governing law. The borrower must sign for the note to be enforceable against them; the lender’s signature is recommended but is not always legally required. This generator collects every one of these elements and assembles them into a template, but a valid note must also comply with your jurisdiction’s usury cap and any required lending disclosures, so check your local rules and have a lawyer review it.

A secured note is backed by collateral — specific property such as a car, equipment or real estate — that the lender can take and sell if the borrower defaults. An unsecured note has no collateral and rests only on the borrower’s promise to pay, so the lender’s only remedy on default is to pursue the debt as an unsecured creditor.

A secured promissory note is backed by collateral: the borrower grants the lender a security interest in specific property — for example a vehicle, business equipment, inventory or real estate — and if the borrower defaults the lender can, within the law, take, sell or otherwise enforce its rights against that property and apply the proceeds to the debt. Because the lender has that extra assurance, secured notes often carry lower interest. An unsecured note has no collateral; it relies entirely on the borrower’s personal promise, so on default the lender’s remedy is to sue and collect as an unsecured creditor. This generator lets you toggle between the two: choosing secured adds a security-interest clause where you describe the collateral, while unsecured adds a clause stating the note is not backed by any collateral. Note that a secured note usually needs a separate security agreement, lien, mortgage, deed of trust or financing statement to actually perfect and enforce the security interest against the collateral.

You can charge a simple annual interest rate or make the note interest-free. Every US state (and most countries) caps the maximum interest by a usury law, and charging more than the legal limit can forfeit the interest or, in some places, make the entire note void and unenforceable — so always confirm your local cap.

A promissory note can charge interest on the unpaid principal — usually a simple annual rate (per annum) — or it can be interest-free, in which case the borrower repays only the principal. The crucial limit is usury law: every US state, and most countries, sets a maximum lawful interest rate, and the cap can depend on the type of loan and whether the lender is a licensed institution. Exceeding the usury cap has serious consequences — depending on the jurisdiction the lender may forfeit the interest, have to refund excess interest, or have the entire note declared void and unenforceable. To reduce that risk this generator includes a clause that automatically reduces an over-limit rate to the highest lawful rate, but that safeguard is not a substitute for charging a lawful rate in the first place. Any payment estimate the tool shows is a rough convenience figure, not legal or financial advice, so confirm your state or country’s usury limit and any required disclosures before you set a rate.

No. The promissory note is assembled entirely in your browser. Nothing you type — the lender and borrower names and addresses, the principal, interest rate, repayment schedule, collateral description or co-signer name — is sent to a server, logged or stored.

AnyTool’s Promissory Note Generator runs completely client-side. Every keystroke and toggle updates the Markdown, HTML, plain text and the live preview locally, with no server round-trip, so the lender and borrower details, the principal amount, interest rate, repayment terms, late fee, collateral description and co-signer name never leave your device. Because a promissory note contains personal and financial information, keeping the draft local matters. The page works offline once cached, and closing the tab discards your draft.

Detailed Explanation

Methodology

How the Promissory Note Generator Builds the Document

AnyTool’s Promissory Note Generator maps a short form to a structured loan IOU / promise-to-pay entirely in the browser. It reuses the same clock-free engine as the Privacy Policy, Terms of Service, NDA, DMCA, Freelance Contract, Lease Agreement, Power of Attorney and Bill of Sale generators (legalDocEngine), which models a document as a title, an effective date, an intro and an ordered list of { heading, body } sections and renders that single model into Markdown, ready-to-paste HTML and plain text. A dedicated promissoryNoteDoc builder assembles the note from your inputs — the lender (payee) and borrower (maker) names and addresses, the principal and currency, a simple annual interest rate or an interest-free flag, the repayment structure, an optional late fee and grace period, a prepayment toggle, a secured flag with a collateral description, an optional co-signer, and the governing law — and assembles only the clauses your choices require. The repayment clause switches between a single lump sum due on one maturity date, equal installments on a weekly / bi-weekly / monthly / quarterly schedule (with an optional honest payment estimate computed from the principal, rate and number of payments), or payment on demand. The interest clause states a simple per-annum rate or interest-free terms; a late-charge clause appears only when a late fee is set; the prepayment clause states whether early payoff is allowed without penalty; a security-interest clause with the collateral description is added only for a secured note (otherwise an unsecured clause is used); an acceleration-on-default clause is always present; and the signature block adds a co-signer / guarantor line only when a co-signer is named.

  • Clauses cover parties, the promise to pay, interest, repayment (lump / installments / on demand), late charge, prepayment, security or unsecured, default & acceleration, governing law, and signatures
  • Repayment rewrites the clause: lump sum (one maturity date), installments (frequency, first-payment date, optional amount and count) or on demand
  • Simple annual interest or interest-free; an optional honest installment estimate is computed from the principal, rate and number of payments
  • Secured note adds a collateral / security-interest clause; an interest clause caps an over-limit rate at the highest lawful rate; optional late fee, prepayment toggle and co-signer
  • All assembly is pure client-side JavaScript — no server call, no CDN, no upload
Privacy & Security

Client-Side Processing and the Live Preview

Every input — the lender and borrower names and addresses, the principal amount, the interest rate, the repayment schedule, the late fee, the collateral description and the co-signer name — is processed locally. The Markdown, HTML, plain text and a rendered HTML preview (produced with the marked library in the browser) all update on each keystroke with no network round-trip, so the details used to build the promissory note never leave the device. Because a promissory note contains personal and financial information, keeping the draft local matters. The page works offline once cached, and the draft is discarded when the tab is closed. Users can copy any format or download promissory-note.md, .html or .txt, each ending in borrower, lender and optional co-signer signature lines.

  • No upload, logging or storage — inputs stay in the browser
  • Live HTML preview rendered locally via the marked library
  • Three export formats: Markdown, HTML and plain text, each with borrower, lender and optional co-signer signature lines
  • Works offline once cached; closing the tab discards the draft
Limitations

A Template, Not Legal or Financial Advice — Usury Caps and Required Disclosures

The generated promissory note is a starting template based on common practice, not legal or financial advice, and the tool does not guarantee that it is valid, enforceable or collectable. A promissory note is a legally binding promise to repay money, and the rules differ by state and country. Most importantly, interest is capped by usury laws that vary by jurisdiction and by loan type: charging more than the legal maximum can forfeit the interest, require a refund of excess interest, or in some places make the entire note void and unenforceable. To reduce that risk the generated note includes a clause that automatically reduces an over-limit rate to the highest lawful rate, but that is no substitute for charging a lawful rate, and any payment estimate shown is a rough convenience figure rather than a binding amount. Consumer, payday, real-estate-secured and business loans often require specific disclosures, licensing or a different document, and a secured note usually needs a separate security agreement, lien, mortgage, deed of trust or financing statement to be enforceable against the collateral. The interface states this prominently at the top and again next to the output, leaves bracketed placeholders for details the author must supply, includes signature lines, and recommends that the user confirm the usury limit and disclosure rules where they live and have a qualified attorney review the document before anyone signs or relies on it.

  • Output is a template, explicitly not legal or financial advice, and creates no lawyer-client relationship
  • Interest is capped by usury laws that vary by state and country; an unlawful rate can forfeit the interest or void the entire note
  • Consumer, payday, real-estate and business loans may require specific disclosures, licensing or a different document
  • A secured note usually needs a separate security agreement, lien, mortgage or financing statement to be enforceable against the collateral
  • Bracketed placeholders and signature lines flag what the author must complete; confirm the local usury cap and have a qualified attorney review it
Promissory note generation: in-browser (AnyTool) vs typical online generators
CapabilityAnyToolTypical online generators
ProcessingRuns entirely in your browserOften server-side, account-gated
Your inputsNever uploaded, works offlineUsually sent to and stored on a server
Repayment typesLump sum, installments or on demand — the clause rewrites to matchOften a single fixed repayment style
InterestSimple annual rate or interest-free, with a usury-cap safeguard clauseVaries; usury limit rarely flagged
Payment estimateOptional honest estimate from principal, rate and number of paymentsOften none or paywalled
SecuritySecured (collateral / security-interest clause) or unsecuredOften fixed or unsecured-only
Default & extrasAcceleration on default, optional late fee, prepayment toggle, co-signer / guarantorVaries; sometimes omitted
Output formatsMarkdown, HTML and plain textOften HTML/PDF only or a hosted page
PreviewLive local HTML preview (marked)Varies
Honesty about limitsProminent template-not-legal/financial-advice + usury-cap + disclosure warningSometimes implies enforceability
Cost / signupFree, no signupOften gated, upsold or ad-heavy

AnyTool assembles the promissory note locally and uploads nothing. The output is a template, not legal or financial advice; a promissory note is a binding promise to repay money, interest is capped by usury laws that vary by state and country (and an unlawful rate can void the note), some loans require specific disclosures, and a secured note needs a separate security agreement — so confirm your local usury limit and have a qualified attorney review it before you rely on it.