A letter of intent (LOI) is a written document that summarizes the main terms of a potential agreement before either party commits to a binding contract. It sets what the parties are proposing, on what terms, and under what conditions they are willing to move forward. LOI templates are used across business transactions, real estate deals, partnerships, acquisitions, and academic applications.
An LOI is sometimes called a letter of intent form, an LOI form, or a letter of intent format, depending on the context. In some industries, the same document may be called a term sheet or memorandum of understanding. While the names differ, the core purpose is the same: to put the key terms in writing early, before the time and cost of drafting a full contract.
Most letters of intent are non-binding — they express intent without creating enforceable obligations. However, specific clauses within an LOI, such as confidentiality, exclusivity, or governing law, can be written as legally binding even when the rest of the document is not. The way a clause is worded determines whether it creates an obligation, which is why careful drafting matters even for a "preliminary" document.