Alex is Sprintlaw’s co-founder and principal lawyer. Alex previously worked at a top-tier firm as a lawyer specialising in technology and media contracts, and founded a digital agency which he sold in 2015.
- What Is a Promissory Note?
- When Should I Use a Promissory Note Template?
- How Does a Promissory Note Differ from Other Agreements?
- What Should a Promissory Note Template Include?
- Are Free Promissory Note Templates a Good Idea?
- What Are the Key Legal Risks With Promissory Notes?
- How Do I Customise a Promissory Note Template for My Business?
- What Are My Next Steps If I Want To Use a Promissory Note?
- Does My Promissory Note Need to Meet Any Specific Legal Requirements in the UK?
- What If the Loan Isn’t Repaid? Enforcing Your Promissory Note
- Other Useful Legal Documents for Business Lending
- Key Takeaways
Looking to borrow money or lend funds between businesses, partners, or even friends? Making these financial arrangements official is key to avoiding awkward disputes or costly misunderstandings down the line. One of the most practical (and commonly used) ways to do this in the UK is by using a promissory note. But what exactly is a promissory note, and how do you use a promissory note template the right way for your business loans or agreements?
Don’t stress - with the right understanding and a bit of expert guidance, you can quickly get to grips with how promissory notes work, why using a good template matters, and how to make sure you’re protected from day one. In this guide, we’ll walk you through what a promissory note is, when to use one, what to look for in a template, the legal essentials you need to tick off, and some next steps for ensuring you stay compliant and secure.
What Is a Promissory Note?
A promissory note is a legally binding document where one party (the borrower) promises in writing to pay a specific amount of money to another party (the lender) by a certain date, or on demand. Think of it as a formal IOU - but with real legal weight behind it.
Promissory notes are used in all sorts of business situations, such as:
- Lending money to kickstart a new venture or cover a cash flow gap
- Employee or director loans
- Inter-company loans (e.g. between a parent company and its subsidiary)
- Short-term loans between business partners or shareholders
- Replacing informal verbal agreements with something enforceable
By putting the arrangement in writing, both sides can be sure of what’s expected and when. And - crucially - a well-drafted promissory note means you’re far better protected if something goes wrong.
When Should I Use a Promissory Note Template?
You should consider using a promissory note template whenever you’re lending money or receiving a loan in a business context that:
- Is not covered by a larger loan agreement (like with a bank)
- Is between individuals, business partners, family, or related companies
- Needs clear terms for how and when repayment will occur
- Calls for simple documentation, but more formal than an email or verbal promise
While many business owners rely on goodwill, misunderstandings and disputes can easily arise - especially when significant sums are involved. Using a properly structured promissory note ensures there’s no confusion about repayment amounts or timeframes, helping both parties stay on good terms.
How Does a Promissory Note Differ from Other Agreements?
It’s easy to get promissory notes confused with other finance-related documents. Here’s how they stand apart:
- Loan Agreements: Far more detailed and formal, typically used with larger lenders (like banks).
- IOUs: Informal acknowledgments of a debt, often lacking legally enforceable terms.
- Convertible Notes: Used by startups to raise investment that could convert to equity in the future - more complex legally.
- Shareholder Loans: Usually documented through written loan agreements, but can also use promissory notes.
In short: a promissory note is the ‘middle ground’ - simple but official, and perfect for straightforward lending between businesses or individuals.
What Should a Promissory Note Template Include?
All promissory notes should cover certain essentials to ensure the arrangement is legally binding and enforceable in the eyes of UK law. Whether you’re using a free promissory note template, a sample promissory note, or creating your own document, make sure it includes:
- Names and addresses of both lender and borrower
- Principal amount being lent
- Interest rate (if any) and how it is calculated
- Repayment terms (e.g., on a specific date, by instalments, or on demand)
- Events of default and what happens if repayment is late or missed
- Signatures of both parties (witnessed, if appropriate)
- Any security provided (e.g., collateral for the loan, if applicable)
If you’re looking for a sample promissory note, these are the basic elements to include. But be careful: using a generic template found online can leave you exposed if it doesn’t take into account your specific situation or UK law.
Are Free Promissory Note Templates a Good Idea?
You might be tempted by the promise of a free promissory note template or a sample document you found with a quick Google search. But before you rely on a free template, keep in mind:
- Many “sample” notes are not written for UK legal requirements.
- Terms may be outdated, ambiguous, or not suit your circumstances.
- Failure to address events of default or dispute resolution can make it hard to enforce your rights in court.
- If the loan is business-related, there may be special tax, company, or regulatory implications to consider.
For simple agreements between trusted parties, a sample promissory note or free template can be a starting point for discussion. But for anything involving significant sums, valuable business relationships, or company money, it’s wise to have a lawyer review or draft your document so it’s fit for purpose.
What Are the Key Legal Risks With Promissory Notes?
If a promissory note isn’t clearly written or doesn’t comply with UK law, you could face real problems down the line - whether you’re the borrower or the lender. Common mistakes include:
- Unclear repayment deadlines or interest calculation (leading to disputes)
- Lack of detail on consequences if repayment is missed
- No clarity on what happens if either party goes bankrupt
- Notes drafted for another country or using inappropriate jurisdiction clauses
- Notes missing key legal requirements (such as signatures, or clear identification of both parties)
If things ever got to court, having a legally valid and well-drafted promissory note massively increases your chances of recovering the loan or defending yourself successfully. Addressing these legal requirements from the start protects your business from unnecessary risk.
How Do I Customise a Promissory Note Template for My Business?
If you decide to use a promissory note template, tailoring it accurately to your deal is vital. Here’s what you should always check or add:
- All parties’ full legal names, trading names (if relevant), and addresses
- Specific details of the debt, repayment amount(s), due dates, and interest terms
- What ‘default’ means (missing a payment, insolvency, breach of other promises, etc.)
- How you’ll resolve disputes (for instance - mediation or legal action in a certain UK court)
- If there’s security, describe it in detail (such as a charge over company assets)
- Whether either side is entitled to assign the promissory note (transfer it to someone else)
- Details of any additional terms you’ve agreed that may affect the repayment (such as early repayment rights or penalties)
Remember, in business, every scenario is unique. Avoid just copying a template word for word - discuss your needs with a legal expert to make sure your document is enforceable and works for everyone involved.
What Are My Next Steps If I Want To Use a Promissory Note?
If you’re getting ready to lend or borrow money, here’s a sensible approach for setting up your promissory note:
- Have a clear conversation with the other party. Make sure you both agree on all the key terms before writing anything down.
- Prepare your promissory note template. If you use a template, ensure it’s suitable for UK law and covers the points above.
- Have it reviewed by a solicitor. For any business-related loan, especially involving shareholders, related companies, or third parties, legal review is the best way to avoid future disputes (see our contract review service).
- Sign the document properly. Both parties should sign - and consider having independent witnesses, especially for larger sums or where company assets are involved (learn more about witnessing contracts).
- Store the document safely and share copies. Both sides should keep a copy of the signed promissory note accessible.
- Stick to the agreement. If there are any changes later, always amend the promissory note in writing and have both parties sign the changes (see how to safely amend contracts).
Does My Promissory Note Need to Meet Any Specific Legal Requirements in the UK?
Most promissory notes for business loans in the UK don’t have to be officially registered or notarised, but they:
- Must be in writing and signed by the borrower at minimum (ideally by both sides)
- Should be detailed enough so there’s no ambiguity over the terms
- May trigger additional requirements if security is given (such as registering a charge by a company at Companies House)
- Should comply with other business law duties (for example, company directors must act in the company’s best interests when issuing or accepting loans)
It’s also worth keeping in mind that tax may apply to the interest earned through a promissory note, and regulatory rules could be relevant (for instance, for very large loans, or where consumer finance is involved).
What If the Loan Isn’t Repaid? Enforcing Your Promissory Note
Ideally, everything goes smoothly, and the borrower repays on time. But life isn’t always ideal. If repayment is missed, a clear promissory note gives you a solid legal basis for:
- Requesting full repayment (plus any agreed interest and penalties)
- Triggering any agreed security (e.g., seizing pledged assets)
- Pursuing the debt in a UK court or using statutory demand processes
The court will look to the written terms of your note, so the clearer your agreement, the easier (and less costly) enforcement will be. You can learn more about business debt recovery here.
Other Useful Legal Documents for Business Lending
Depending on the complexity of your situation, you might also want to consider these additional agreements and documents:
- Loan Agreements - for more detailed or multi-party arrangements
- Personal Guarantees - if an individual is personally backing a business loan
- Deeds of Assignment or Novation - if you may need to transfer the loan
- Waivers and Indemnities - to manage liability and risk further
Setting up your legal foundations with the right agreements can save countless future headaches and ensure smooth business relationships.
Key Takeaways
- A promissory note is a simple, legally binding document that sets out a debt and repayment terms in writing, providing clarity and protection for loans between businesses or individuals.
- Using a promissory note template can help, but always check it’s suitable for your exact situation and compliant with UK law - generic or free notes often lack necessary protections.
- A good promissory note should clearly state the borrowers and lenders, loan amount, repayment details, interest, events of default, dispute process, and be signed by both parties.
- Having your document reviewed or drafted professionally is highly recommended for anything but the simplest loans, as this will ensure you’re properly protected and enforceable in court.
- Enforcement is much easier if your promissory note is clear, complete, and validly executed.
- Consider if you also need additional agreements, like loans, guarantees, or deeds of assignment, for more complex deals.
If you need tailored legal advice on using or preparing a promissory note, or want support with any other business contracts, you can reach us on 08081347754 or at team@sprintlaw.co.uk for a free, no-obligations chat. Our friendly experts are here to help you get your legal foundations right from day one.


