Two companies are talking about a merger. A buyer wants to purchase a small business but isn’t ready to sign a full purchase agreement yet. A landlord and a prospective commercial tenant have agreed on the broad strokes of a lease but need time to work out the details. In each case, both sides want something in writing that says “we’re serious about this” without yet committing to every clause of a final, binding contract. That’s exactly what a letter of intent is for.
This covers what a letter of intent actually does, why “non-binding” doesn’t mean “meaningless,” what needs to be in one, and the mistake that turns a simple LOI into an accidental contract.
What a Letter of Intent Actually Does
A letter of intent, often shortened to LOI, is a written document that outlines the preliminary terms of a proposed deal before a final, binding agreement is signed. It signals genuine intent to move forward, sets expectations for both sides, and gives everyone a shared reference point while the details get worked out.
The key word is preliminary. An LOI isn’t the deal itself, it’s the roadmap for getting to the deal. It typically covers the big-picture terms, price range, timeline, key conditions, without locking in every detail a full contract eventually will. This makes it useful in situations where both parties want to invest time in due diligence, financing, or further negotiation, but neither wants to commit fully until they know the deal is actually going to work.
Where an LOI Actually Gets Used
Business acquisitions are probably the most common use, where a buyer and seller agree on a rough price and structure before the buyer spends real money on due diligence, accountants, and legal review. Commercial real estate follows a similar pattern, with landlords and tenants using an LOI to agree on rent, term length, and major conditions before drafting a full lease. Joint ventures and partnerships often start with an LOI to confirm both sides actually want to move forward together before spending time on a full partnership agreement. And vendor or supplier relationships sometimes use one to lock in rough terms while contracts and legal review catch up.
If the relationship you’re formalizing is a partnership rather than an acquisition or lease, and you’re past the LOI stage and ready for the real terms, our guide on how a partnership agreement generator simplifies business partnerships covers what that fuller document needs to include.
“Non-Binding” Doesn’t Mean What Most People Assume
This is the part that catches people off guard. Most letters of intent are explicitly non-binding, meaning neither party is legally obligated to complete the final deal just because they signed the LOI. But an LOI can still contain specific clauses that are binding even while the rest of the document isn’t. Confidentiality clauses, exclusivity or “no-shop” provisions that stop one side from negotiating with anyone else during a set period, and governing law clauses are commonly carved out as binding, even in an otherwise non-binding letter.
This mixed structure is exactly where LOIs cause problems if they’re written casually. Someone assumes the whole document is just a friendly formality, signs it without reading closely, and later finds out they agreed to an exclusivity period that legally prevented them from talking to other buyers or partners for sixty days. Every clause in an LOI should be clearly labeled as binding or non-binding, and if that labeling isn’t explicit, it’s worth assuming a court could interpret ambiguous language either way.
What Actually Belongs in a Letter of Intent
A well-built LOI covers a consistent set of ground. Clear identification of both parties, including full legal names. A description of the proposed transaction or relationship in plain terms. The key commercial terms as currently understood, price, structure, timeline, without over-specifying details that still need negotiation. An explicit statement of which sections, if any, are binding, and which are not. Any conditions that need to be satisfied before the deal can close, financing approval, due diligence results, regulatory clearance. And a response deadline or expiration date, so the LOI doesn’t sit indefinitely as a vague, half-open commitment.
That last point matters more than people expect. An LOI without an expiration date can quietly linger for months, creating confusion about whether the deal is still active or whether either side considers themselves free to walk away. A clear deadline forces a decision one way or the other.
The Exclusivity Clause: Read This One Twice
An exclusivity or “no-shop” clause is one of the most consequential parts of an LOI, and it’s often binding even when nothing else in the document is. It prevents one party, usually the seller or the party being courted, from negotiating with anyone else for a set period while the deal is being finalized.
From the buyer’s side, this makes sense: nobody wants to spend weeks and real money on due diligence only to find out the seller quietly accepted a better offer from someone else. From the seller’s side, it means genuinely taking their business or property off the market for that window, even though the deal isn’t guaranteed to close. Before agreeing to exclusivity, it’s worth being realistic about how long the other side actually needs and whether that timeline is reasonable given how firm their interest actually seems.
Letter of Intent vs Memorandum of Understanding
These two terms get used almost interchangeably, and in most everyday business contexts, they function the same way: a preliminary, mostly non-binding document outlining proposed terms before a final agreement. Where a distinction sometimes gets drawn, an LOI tends to be used more in deal-making contexts like acquisitions and transactions, while an MOU tends to show up more in partnerships, collaborations, and situations without money directly changing hands. In practice, what matters far more than which label you use is whether the document clearly states what’s binding and what isn’t.
The Due Diligence Angle Nobody Talks About Enough
The Small Business Administration’s guidance on buying a business specifically recommends using preliminary agreements like a letter of intent before committing to the time and expense of full due diligence, since it establishes that both sides are seriously aligned on the basic terms before either party spends significant money confirming the details. You can review the SBA’s guidance on buying an existing business for how this fits into the broader acquisition process. The core idea scales down well beyond acquisitions too: an LOI is what earns the right to spend real time and money on the details, by confirming first that both sides actually want the same deal.
Final Thoughts
A letter of intent earns its place whenever two parties want to move forward on something significant without committing to every final detail up front. Its real value isn’t the binding weight of the document, most of it usually has none, it’s the clarity it forces onto a negotiation that might otherwise stay vague indefinitely. Read the exclusivity and confidentiality clauses carefully, set a real deadline, and use it as the bridge it’s meant to be rather than treating it as either meaningless paperwork or a fully binding contract.
Frequently Asked Questions
Q: Is a letter of intent legally binding?
Usually not as a whole, but specific clauses within it, like confidentiality or exclusivity, are often written to be binding even when the rest of the document isn’t. Always check which sections are labeled binding before signing.
Q: Can you back out of a deal after signing a letter of intent?
In most cases, yes, since the core deal terms are typically non-binding. However, backing out can still trigger consequences if you’ve violated a binding clause, such as an exclusivity period or confidentiality obligation.
Q: What’s the difference between a letter of intent and a term sheet?
They’re closely related and sometimes used interchangeably. A term sheet is often more numbers-focused and common in investment or funding contexts, while an LOI tends to be broader and more narrative in format, though the underlying purpose is similar.
Q: Do I need a lawyer to write a letter of intent?
Not always for simple, low-stakes situations, but it’s strongly recommended for significant transactions like business acquisitions or commercial real estate, specifically to review which clauses are binding before you sign.
Q: How long is a letter of intent valid?
It depends entirely on the expiration date written into the document itself. A well-drafted LOI always includes one, typically somewhere between 30 and 90 days depending on the complexity of the deal.