What is a memorandum of understanding (MOU)?
An MOU records what two parties have agreed in principle. Learn when a memorandum of understanding is binding, which clauses always bind, and how to keep it from becoming a contract by accident.
The short answer
A memorandum of understanding (MOU) records the shared intentions of two or more parties before a full contract exists. It is usually meant to be non-binding on the commercial terms, but it is binding if the wording and the parties' behaviour show they intended to be bound — and some clauses, like confidentiality and exclusivity, are normally binding even in a non-binding MOU.
Binding or not — what actually decides it
The title on the document does not decide anything. Courts look at whether the terms are certain enough to enforce, whether there is a clear statement about intention, whether anything of value has been exchanged, and how the parties have behaved since signing.
An MOU that sets a price, a start date and deliverables, and is then acted upon, can be a contract no matter what it is called.
Say it plainly
The single most useful sentence in an MOU states which parts bind and which do not. Without it, you are relying on a judge's reading of context.
Typical split: the commercial terms are stated as intentions 'subject to a definitive written agreement', while confidentiality, exclusivity, costs and governing law are expressly binding.
The clauses that should bind
Even in a deliberately non-binding MOU, make these binding on their own terms:
- Confidentiality — you are about to exchange sensitive information.
- Exclusivity or no-shop, with a clear end date.
- Who bears their own costs if the deal does not proceed.
- Publicity — neither side announces anything without consent.
- Governing law and dispute resolution, so a fight about the MOU has a forum.
MOU, LOI, term sheet, heads of terms
These names overlap heavily. A letter of intent (LOI) and a term sheet are most common in transactions and investment; heads of terms in property and M&A; MOU in partnerships, government and non-profit work. The legal analysis is identical: read the intention wording, not the title.
Give it an expiry date
An MOU that never lapses lingers as evidence of what the parties agreed long after the deal changed shape. Add a date after which it falls away unless a definitive agreement is signed or the parties extend it in writing.
Sample clause language
Illustrative wording, written for this guide — not copied from any real contract.
The parties agree that Party A shall provide the services described in Schedule 1 from 1 October for a fee of $8,000 per month, and shall work together in good faith to document this arrangement in due course.
Defined service, price and start date, with no statement that it is non-binding. This is a contract wearing an MOU label.
Save for clauses 6 (Confidentiality), 7 (Exclusivity), 8 (Costs) and 9 (Governing Law), which are binding, this Memorandum records the parties' current intentions only, is not intended to create legal relations, and is subject to the execution of a definitive written agreement. This Memorandum lapses on 31 December unless extended in writing.
States what binds, what does not, and when the whole thing expires.
Red flags to look for
- No statement about whether the document is binding.
- Precise price, dates and deliverables in a document meant to be non-binding.
- Exclusivity with no end date.
- No expiry, so the MOU outlives the negotiation.
- Parties already performing the work before the definitive agreement exists.
What to ask for
- Add an explicit binding/non-binding clause naming the binding clauses.
- Keep commercial detail at the level of intention, not obligation.
- Put an end date on exclusivity and on the MOU itself.
- Say each side bears its own costs if no deal is reached.
- Do not start delivering work until the definitive agreement is signed.
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Frequently asked questions
Is an MOU legally binding?
It can be. If the terms are certain and the parties intended to be bound — or behaved as if they were — it is enforceable regardless of the title. An express non-binding statement is the reliable way to avoid that.
What is the difference between an MOU and a contract?
A contract is intended to create legal obligations; an MOU normally records intentions ahead of one. In practice the difference lives in the wording about intention, not the name.
Can you break an MOU?
If it is genuinely non-binding, walking away has no contractual consequence — but binding clauses such as confidentiality and exclusivity still apply, and misleading conduct can create liability outside contract law.
Do you need a lawyer for an MOU?
For a short, clearly non-binding MOU, often not. Get advice if it contains exclusivity, money, IP, or anything the other side may start relying on.
Related guides
This guide is general educational information about how these clauses usually work. It is not legal advice, and contract law differs by jurisdiction. For a decision that matters, speak to a qualified lawyer.