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Corporate · Guide · 7 min

The letter of intent: what to include, what binds and what to leave for the agreement

A plain-language walk through the letter of intent on an Ontario business purchase: the terms it should cover, the clauses that bind, and the traps.

Last reviewed September 4, 2026 · Updated September 4, 2026

A plain-language walk through the letter of intent on an Ontario business purchase: the terms it should cover, the clauses that bind, and the traps.

⚖️ This is general information, not legal advice. It can't account for your specific situation. Use it to get oriented, then confirm the details with a licensed Ontario lawyer.

A letter of intent is the first document most buyers and sellers sign, and the one they read least carefully. It is short, it says it is non-binding, and the broker has a form. Yet the LOI sets the price, the structure and the timetable, and its binding clauses on exclusivity, confidentiality and deposits can cost real money if the deal fails. This guide explains what a good LOI covers, what actually binds you in Ontario, and which points are better left for the purchase agreement.


What an LOI should say

What binds and what does not

In Ontario a document binds when the parties intended to be bound and the essential terms are certain. The label does not decide. An LOI that says the deal terms are non-binding and that no obligation to buy or sell arises until a definitive agreement is signed will normally be read that way. But the same LOI usually makes specific clauses binding on purpose: confidentiality, exclusivity, costs, governing law and sometimes a break fee.

The danger is language that reads as a promise: the buyer will purchase, the seller agrees to sell, or a signature block with no non-binding statement at all. Courts also look at conduct. A party that acts as if the deal were done, for example by taking possession or letting the other side incur large costs on the strength of the LOI, may find it harder to argue that nothing was agreed.

Deposits

Exclusivity

Exclusivity protects the buyer's investment in diligence. Sixty to ninety days is common for a small business. Link the period to the seller's obligation to deliver documents within a set number of days of each request, with an automatic extension if the seller is late. Say whether the seller may continue to talk to other buyers without negotiating, and whether it must tell you if another offer arrives. A seller, for its part, should insist that exclusivity ends automatically if the buyer misses a financing or diligence date.

Leave for the purchase agreement

Common traps


How Treadstone Law can help

A good LOI is short, honest about what it does not decide, and precise about the few things it does. Have it reviewed before you sign; the cost is small next to the cost of untangling a bad one.

Treadstone Law handles corporate matters on a transparent flat fee, with online intake and a real lawyer on your file, across Ontario.


This is not legal advice

This guide is general information, not legal advice. Reading it does not create a lawyer-client relationship. Ontario laws and government programs change, and how the law applies depends on your specific facts. For advice about your situation, speak with a licensed Ontario lawyer. Treadstone Law is licensed by the Law Society of Ontario — reach us at 1-844-900-1070 or start a file online.

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Official resources

Government and regulator sources for this topic. Rules change — confirm the current position before you rely on it.

Official resources

Government and regulator sources for this topic. Rules change — confirm the current position before you rely on it.

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These guides are general information, not legal advice. Reading one does not create a lawyer–client relationship. For advice about your situation, speak with a licensed lawyer — call 1-844-900-1070.

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