Brad is on the roll of solicitors of England & Wales but does not hold a practising certificate and does not provide legal advice.
Updated June 2026 · England & Wales
A Memorandum of Understanding, often shortened to MOU, is the document two or more parties reach for when they have shaken hands on the shape of a deal but are not yet ready to sign a full contract. It captures the direction of travel, records what has been agreed in principle, and gives everyone a reference point while the detail gets worked out.
In a commercial context, that might mean the early stages of forming a company together, scoping a joint venture, or setting the groundwork for a longer commercial arrangement. Whether an MOU is legally binding depends entirely on how it is written and what the parties actually intend.
This guide walks through what an MOU does, when it helps, what to put in one, and the traps that catch people out.
What this document is
An MOU is a written record of the shared intentions of two or more parties who are planning to work together. It sits earlier in the commercial timeline than a shareholders' agreement, joint venture agreement, or services contract. Think of it as the framework that says 'here is what we have agreed so far, here is what we still need to negotiate, and here is how we will behave while we figure the rest out'.
The common misconception is that an MOU is automatically non-binding because it feels informal. That is not how English law treats it. Under the law of England and Wales, a court looks at the substance of what the parties wrote and did, not the label on the top of the document.
If the wording shows an intention to create legal relations and the basic elements of a contract are present, parts of the MOU can bind the parties even if they thought it was just a gentlemen's agreement. This is why drafting matters.
An MOU typically covers the parties involved, the purpose of the proposed arrangement, key commercial terms being discussed, confidentiality, exclusivity (if any), costs, timelines, and whether specific clauses are intended to be binding.
How to use this document
Identify the parties and the purpose. Name each party in full, including company numbers where a business entity is involved, and describe in plain terms what you are trying to achieve together. A vague purpose creates vague obligations later, so be specific about the project, venture, or company you intend to form and the role each party is expected to play.
Set out the commercial framework. Record the headline terms you have agreed in principle, such as the split of ownership, who contributes what (cash, assets, IP, time), how decisions will be made, and the expected structure of any company or joint venture. This section is where most negotiation happens, so capture the current position clearly rather than trying to hide disagreement with woolly language.
Be explicit about what binds and what doesn't. This is the single most important part of any MOU. State clearly which provisions are intended to be legally binding (commonly confidentiality, exclusivity, costs, and governing law) and which are 'subject to contract' and non-binding. Without this, you risk a court deciding for you.
Address confidentiality and exclusivity. Early-stage discussions often involve sensitive commercial information. A confidentiality clause protects what is shared during negotiations. Exclusivity, sometimes called a lock-out clause, prevents the other side from shopping the same deal around while you negotiate in good faith. Both clauses are commonly binding even when the rest of the MOU is not.
Agree governing law, term, and next steps. Specify that the MOU is governed by the laws of England and Wales (assuming that is the intention), state how long the MOU lasts, and describe the path to a definitive agreement, including target dates for signing the full contract. Sign and date the document, keeping a countersigned copy for each party.
Q Is a Memorandum of Understanding legally binding in the UK?
It depends on the wording and what the parties intended. English courts look at substance over label. If the MOU shows an intention to create legal relations and has the elements of a contract, it can bind the parties. To avoid uncertainty, state clearly which clauses are binding (such as confidentiality or exclusivity) and which are expressly non-binding and 'subject to contract'.
Q What is the difference between an MOU and a contract?
A contract is a complete, enforceable agreement with all material terms settled. An MOU usually sits earlier in the process and records what the parties have agreed in principle while the detail is still being negotiated. An MOU can contain binding clauses, but the overall deal is typically not finalised until a full contract is signed.
Q What is the difference between an MOU and a Heads of Terms?
In practice the terms are often used interchangeably. Both describe a preliminary document recording the shape of a deal before full contracts. You may also see 'Letter of Intent' or 'Term Sheet' used in similar contexts. What matters is not the title but whether the document makes clear which provisions are binding and which are not.
Q When should we use an MOU rather than going straight to a contract?
An MOU is useful when parties want to commit to the direction of a deal, protect confidential information, or secure a period of exclusivity while the detail is worked through. It is also helpful where due diligence, regulatory approvals, or third-party consents are still pending. If the terms are already fully agreed, skip the MOU and sign the contract.
Q Can one party walk away from an MOU?
Usually yes, provided they comply with any binding clauses such as confidentiality, exclusivity, and costs. The non-binding commercial terms are generally a statement of intent rather than an enforceable promise to complete the deal. However, walking away in breach of a binding provision (for example, leaking confidential information) can give the other side a claim.
Q Do we need a lawyer to draft an MOU?
You are not legally required to use a lawyer, and MOUs are often drafted in-house. That said, the binding/non-binding distinction is easy to get wrong, and a poorly drafted MOU can create obligations you did not intend or fail to protect information you needed to protect. For anything with meaningful commercial value, a professional review is worth the cost.
Q How long should an MOU last?
Most MOUs include a fixed term, often between one and six months, matching the expected timeline to negotiate the full contract. You can include an extension mechanism or provide that the MOU terminates automatically once the definitive agreement is signed. Confidentiality obligations typically survive termination for a further period.
The binding/non-binding line in a Memorandum of Understanding is where most problems start, and the wrong wording can commit you to things you never intended. An experienced legal adviser can help you think through what your MOU means in practice, based on what you describe on the call.
✓A plain-English explanation of what an MOU does and doesn't do
✓Practical perspective on which clauses commonly bind based on what you describe
✓What to watch out for around confidentiality, exclusivity, and 'subject to contract' wording
✓Clarity on your next steps before signing or moving to a full contract
Personal call · For information only · Independent advisers
Written & reviewed by
Brad Askew Solicitor (non-practising)
Brad is on the roll of solicitors of England & Wales but does not hold a practising certificate and does not provide legal advice. LegalDocuments.co.uk is not a law firm and does not provide regulated legal advice.
This article is for general information only. It is a tool to help you find your way — not legal advice, and not a substitute for speaking to a qualified adviser about your situation.
