A memorandum of understanding (MOU) or letter of intent (LOI) is not automatically binding or automatically non-binding in Singapore. What matters is what the parties intended, judged objectively from the words used and their conduct, and whether the terms are certain enough to enforce. Many MOUs make the main commercial deal non-binding while making selected clauses, such as confidentiality, exclusivity, costs and governing law, binding immediately. Singapore’s Court of Appeal has also upheld an express clause requiring parties to negotiate in good faith. So even a “non-binding” MOU can leave you with real obligations.
This guide is for business owners and directors who are about to sign, or have already signed, an MOU, LOI or term sheet and need to know what they are actually committed to.
Why does the label not decide the question?
Calling a document an MOU, LOI, term sheet or heads of terms does not by itself make it binding or non-binding. These are commercial labels, not legal categories. A document headed “Letter of Intent” can be a complete, enforceable contract if it contains all the essential terms and nothing suggests the parties meant to wait for a formal agreement. Equally, a document headed “Agreement” may not bind if the parties clearly intended to sign something more detailed first.
For short definitions of the documents themselves, see our glossary entries on the memorandum of understanding and the letter of intent. This guide goes further and looks at which obligations survive if the deal falls apart.
What do Singapore courts look at to decide if an MOU binds?
Intention to create legal relations
In commercial dealings, courts generally start from the position that businesses intend their agreements to have legal effect. That presumption can be displaced by clear words. Phrases such as “this MOU is not legally binding” or “subject to contract” are strong signals that the parties did not intend to be bound yet, at least on the matters they cover.
The test is objective. A court asks what a reasonable person would conclude from the documents, emails and conduct, not what one party privately thought.
Certainty and completeness
Even if the parties meant to be bound, a court cannot enforce terms that are too vague, or a deal where essential terms (for example price, scope or quantity) are expressly left to be agreed later. An “agreement to agree” on a key term is a common reason an MOU fails as a contract.
Consideration
Under Singapore contract law, a promise generally needs something given in return to be enforceable, unless it is made by deed. In an MOU, mutual promises (for example, each side promising to keep information confidential) usually supply this. A one-sided exclusivity promise with nothing in return is more vulnerable.
Conduct after signing
If the parties start performing as though a deal exists, for example by delivering goods, paying invoices or sharing staff, a court may find that a contract came into existence on the MOU terms, even if a formal agreement was never signed. Contracts can also be formed by email: the Electronic Transactions Act 2010 confirms that an offer and acceptance may be expressed by electronic communications. A string of emails “confirming” the MOU terms can therefore matter.
What does “subject to contract” actually do?
“Subject to contract” tells the other side that you do not intend to be bound until a formal contract is signed. Used consistently, it is one of the clearest ways to keep the main deal open.
Its protection is not absolute. It can be weakened if the parties later behave as though they have dispensed with the formal contract, or if correspondence shows they agreed to be bound regardless. It also does not automatically switch off clauses that the MOU expressly says are binding. If you want the main deal open but certain clauses binding now, say both things clearly in the same document.
Which MOU clauses are typically binding?
Most well-drafted MOUs and LOIs divide into two parts: commercial terms that are intended to be non-binding, and a short list of protective clauses that are intended to bind from signing. The table below shows the usual split.
| Clause | Usually intended to bind? | What makes it enforceable |
|---|---|---|
| Price, scope, deliverables | Usually no | Clear “non-binding” or “subject to contract” wording keeps them open |
| Confidentiality | Yes | A clear definition of confidential information, permitted uses and a survival period |
| Exclusivity (lock-out) | Yes, if drafted for it | A fixed period, a defined scope of what the party must not do, and something given in return |
| Costs | Yes | A plain statement that each party bears its own costs, or a defined break fee |
| Non-solicitation of staff or customers | Sometimes | A reasonable duration and scope linked to a legitimate business interest |
| Good faith negotiation | Can be | Express wording; Singapore courts have upheld such clauses |
| Governing law and disputes | Yes | Stating which law applies and which forum resolves disputes about the binding clauses |
| Termination of the MOU | Yes | A long-stop date and a statement of which clauses survive |
If you are relying mainly on confidentiality, a stand-alone non-disclosure agreement signed before the MOU is often cleaner. For the governing law clause, our guide to governing law and jurisdiction clauses explains the choices.
Is an agreement to negotiate in good faith enforceable in Singapore?
English law has traditionally been reluctant to enforce a bare agreement to negotiate, because negotiating parties are entitled to act in their own interests and may walk away. Singapore’s Court of Appeal took a different view of express clauses in HSBC Institutional Trust Services (Singapore) Ltd v Toshin Development Singapore Pte Ltd [2012] SGCA 48. The court said there was no good reason why an express agreement between contracting parties to negotiate in good faith should not be upheld. It reasoned that such clauses are not contrary to public policy and promote the consensual resolution of differences.
Two practical cautions apply. First, that case concerned a good faith clause inside an existing lease (a rent review mechanism), not a stand-alone pre-contract MOU, so how a clause works in a preliminary document still depends on its wording and context. Second, a good faith obligation does not oblige a party to reach agreement. The judgment cited commentary making the point that good faith should not prevent a party from withdrawing from negotiations where appropriate. What a good faith clause typically restrains is dishonest or bad faith conduct during the negotiations, not a genuine decision to walk away.
How should you draft the binding and non-binding split?
- State the overall position at the top. For example: “Except for the clauses listed in paragraph 10, this MOU is not legally binding and no party is obliged to enter into the Definitive Agreement.”
- List the binding clauses by number. Do not leave the reader to guess. Name each one: confidentiality, exclusivity, costs, governing law, termination.
- Give exclusivity a fixed end date. An open-ended lock-out is harder to enforce and risky for the party giving it.
- Add a long-stop date. If no definitive agreement is signed by that date, the MOU ends, except for the surviving clauses.
- Use “subject to contract” consistently. Mark later emails and drafts the same way so your conduct matches the document.
- Do not start performance early by accident. If work must start before signing, put it under a separate short interim agreement with its own price and terms.
- Check who is signing. Make sure the signatory has authority to bind the company, especially for the binding clauses.
What can you do if the other side walks away?
If negotiations collapse, the first question is not “can I enforce the deal?” but “which clauses bound us, and were any of them breached?” Work through it in this order.
- Re-read the MOU and every later email. Identify the clauses expressed to be binding and any correspondence that may have changed the position.
- Check exclusivity. If the other party dealt with a competitor during a defined lock-out period, that may be a breach, though proving loss can be difficult.
- Check confidentiality. If your information is being used, you may be able to demand its return or destruction and, in urgent cases, seek an injunction.
- Check costs and break fees. A clear break fee clause is usually the most straightforward claim.
- Check good faith wording. If the MOU contains an express good faith clause, consider whether the other side behaved dishonestly, for example by misleading you about its intentions.
- Preserve evidence. Keep drafts, emails, meeting notes and messaging records.
- Take advice before sending a demand. A letter that overstates your rights can harm your position later.
A court will not usually force the parties to sign the main deal, and damages for “the deal you would have had” are difficult to obtain where the commercial terms were non-binding. Remedies are generally tied to the specific binding clauses. Where the relationship had already moved into performance, the analysis may become one of breach of an actual contract, discussed in our guide on terminating a contract for breach.
Example: an exclusivity promise in a distribution MOU
Example (hypothetical): A Singapore trading company signs an MOU with an overseas manufacturer to become its exclusive regional distributor. The MOU says the commercial terms are “subject to contract”, but paragraph 9 states that, for 60 days, the manufacturer will not negotiate distribution rights for the region with anyone else, and paragraph 12 lists paragraphs 9 to 11 as binding. In return, the distributor agrees to prepare a market study at its own cost.
Six weeks later, the manufacturer appoints a competitor. The distributor cannot force the manufacturer to sign the distribution agreement, because the commercial terms were never binding. However, it has a credible argument that the binding exclusivity clause was breached during the 60-day period, supported by mutual promises. Its claim would focus on losses flowing from that breach, such as wasted expenditure on the market study, rather than the profits it hoped to make as distributor.
If the MOU had not listed the binding clauses, or had made the whole document non-binding, the distributor’s position would be much weaker.
Before you sign an MOU: a short checklist
- Is there a clear statement of what is and is not binding?
- Are the binding clauses listed by number?
- Does exclusivity have a fixed end date and a defined scope?
- Is there a long-stop date?
- Does the confidentiality clause survive termination?
- Are governing law and dispute resolution stated?
- Is the signatory authorised by the board?
- Have you avoided starting work or paying money under the MOU alone?
If the MOU comes out of a mediation, a different set of questions applies; see our article on heads of terms proposed by a commercial mediator.
Frequently asked questions
Is a signed MOU a contract?
It can be. If it is intended to bind, contains certain and complete terms, and is supported by consideration, it can be enforceable as a contract whatever it is called. Clear non-binding wording usually prevents this for the commercial terms.
Can an MOU be binding even if we never signed it?
Possibly. Contracts can be formed by email exchanges and by conduct. If both sides acted on the terms as though agreed, a court may find a contract, even without signatures.
Does “non-binding” protect me completely?
No. It protects you on the terms it covers. Clauses expressed to be binding, such as confidentiality or exclusivity, can still be enforced, and later conduct can change the position.
Can I sue for the profits I would have made if the deal had gone ahead?
Usually not where the main deal was non-binding. Claims typically relate to breach of the specific binding clauses, and the recoverable loss is linked to that breach.
Should a Singapore company use an MOU or go straight to a contract?
An MOU is useful for complex deals that need due diligence or approvals. For simple transactions, a short binding contract is often clearer and avoids arguments about what was intended.
Need help with an MOU or letter of intent?
If your company, or you as a director or shareholder, is dealing with an MOU, letter of intent or term sheet, or a counterparty who has walked away from one, contact the Raffles Corporate Services team at [email protected] or on WhatsApp at +65 8501 7133 or +65 9018 0072. We will help you understand the documents and deadlines. Where your matter needs a lawyer, we will refer you to a firm on our panel of Singapore law firms that regularly handles commercial contracts. Raffles Corporate Services is a corporate services provider, not a law firm, and this article is general information, not legal advice.
The Raffles Corporate Services Editorial Team