What Is an LOI and Why Is It Important?
By Davis Clarkson , August 26 2025

When two parties are about to work together, the first step is for them to set things out. You wouldn't want to enter a deal without knowing what to expect, your role and the overall framework. That's where a Letter of Intent (LOI) comes in.
So, what is an LOI? In simple terms, it's a document that outlines an initial understanding between different parties. It is usually written before signing a full, binding contract. LOIs are used across different industries.
While most LOIs are not legally binding, they are still important. It helps to ensure that every expectation is clear enough. This article explains a Letter of Intent and everything it entails.
What Is an LOI?
So, what is an LOI? A Letter of Intent is a written document that expresses the intention of two or more parties to work together. This letter shows the intention you may have to work towards having a future agreement. It doesn't finalize the deal. Instead, it specifies the major points so you and the other party can fully understand what it is. This ultimately allows everyone to know what direction the discussions are going.
The main features of an LOI include:
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A preliminary commitment between parties.
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A clear outline of the major terms being discussed.
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Usually non-binding, except for specific clauses.
Purpose and Importance of an LOI
Many parties usually use a Letter of Intent (LOI) before drafting a complete contract. Instead of going directly into the legal agreements, the LOI helps both sides to outline what's important first. Here's why they are important:
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Saves time and resources: An LOI allows parties to confirm if they are on the same page early. This way, you won’t spend weeks negotiating or drafting contracts only to discover later that the deal won't work.
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Clarifies the deal structure: With a Letter of Intent, it usually writes down the basic framework of the agreement. Having this document ahead of time makes it easier to create the final contract, as this has already been agreed upon.
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Builds trust: Even though an LOI is usually not binding, putting your intentions in writing shows that you’re serious about it. It also shows both sides that the other truly cares about what's being offered.
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Acts as a record if a deal fails: Not all negotiations are usually successful at the end, so it records what was agreed on. It can be useful for reference in the future or if a dispute ever occurs.
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Reduces ambiguity: An LOI clearly states expectations, reducing guesswork. Since you and the other party already understand the key terms, it leads to easy negotiations.
What Is an LOI in Business?
You can use a Letter of Intent across different fields or industries, whether business, real estate, or construction.
Therefore, when people ask, "What is an LOI in business ?", the answer is pretty much the same, only in a business context. It is simply a preliminary agreement that states the intentions of different parties before signing a formal contract. Businesses use Letters of Intent (LOIs) to outline the key terms of a deal, agree on negotiations, and reduce misunderstandings.
Letters of Intent in business are mostly used in:
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Mergers & acquisitions (M&A)
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Joint ventures
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Partnerships
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Investment deals
What Is an LOI in Construction?
In the construction industry, a Letter of Intent is a document that states a project owner's intention to work with a contractor. It is written or drafted before the official contract is finalized.
Construction companies and contractors usually rely on LOIs for several reasons. First, it allows both sides to outline the scope of work, responsibilities, and expectations early on. An LOI can confirm key details. It can include estimated costs, timelines, and payment arrangements. This is useful for contractors because it allows them to start initial work.
For example, a contractor may be asked to begin groundwork or order materials under an LOI. This could happen while the full construction contract is still under review. This ensures the project doesn't end up stalling and all deadlines remain on track.
What Is an LOI in Real Estate?
The LOI shows the terms of a potential deal between a buyer and seller, right before they create a formal contract. An LOI outlines important details, such as the purchase price, payment structure, timelines and financing. Writing these down helps both parties see where they agree or disagree before drafting the purchase agreement.
It's important to know how an LOI differs from a purchase agreement. A purchase agreement is legally binding, and it seals the deal between the buyer and the seller. In contrast, an LOI is usually non-binding. It just serves as a form of proposal for negotiations. For example, in commercial lease negotiations, landlords and tenants usually use an LOI to agree on rent. Also, they can use it to pick the lease duration or set responsibilities on this before signing the full lease.
How To Write a Letter of Intent (LOI)
Writing a Letter of Intent doesn't have to be difficult. The key is making sure it's clear and professional. It should cover the most important details so that there wouldn't be any confusion. Here's how you can write it:
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Contact details: The first step is to include contact details, including the names, addresses and roles of the parties involved.
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Introduction: This is where you briefly explain the purpose of the letter. For example, a construction LOI can show the intent to hire a contractor for a project.
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Body: The body is usually the most important part when writing your LOI. Here, you'd need to outline the scope of work, proposed terms and conditions, and any main timelines. This section needs clarity, but shouldn't be so detailed that it replaces the contract.
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Closing and signature: It makes the Letter of Intent official. Both parties should sign and date it to show mutual acknowledgment.
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Supporting documents: If applicable, attach supporting documents, such as a confidentiality agreement (NDA), project specifications or financial information that supports the arrangement.
For best practices, always use professional formatting. This includes company letterhead, consistent fonts and a structured layout. This ensures the document looks credible and minimizes the chances of misunderstandings. Avoid being too vague. If the terms aren't clear, a poorly written LOI can cause disputes later.
A common mistake is adding binding terms. This can make the LOI look like a complete contract. To avoid this, always clarify phrases like "subject to contract". This ensures both sides understand the LOI is only a beginning step.
LOI vs Other Types of Agreement
When businesses begin negotiations, they often choose between different types of preliminary agreements. One of the most common is the Letter of Intent (LOI), but it's not the only option. You need to be able to understand how it compares to other documents:
LOI vs Memorandum of Understanding (MOU)
Both of these documents explain your intentions before a deal is finalized. However, an LOI is more formal and may include specific financial or timeline details. MOUs, on the other hand, are usually broader and they focus on cooperation. They usually don't go into too much depth.
LOI vs Term Sheet
A term sheet is used in investment and startup deals. It lists the main financial and structural terms, like valuation, equity percentages and investor rights. It is very straightforward and mostly numbered. An LOI has a more narrative style and can cover different business agreements.
LOI vs Contract
A contract is legally binding. Most LOIs aren't, unless they include provisions like confidentiality or exclusivity. Companies, however, use LOIs when they want clarity and commitment on the main points.
In Summary
A Letter of Intent is a tool that helps to prepare for successful business dealings. We can say that the strength of an LOI lies in its flexibility. While it is usually not legally binding, it still provides a useful framework that guides both parties to move forward. That said, you should always draft your LOIs carefully. Also, consult a lawyer or industry advisor for help. An LOI can then serve as a great foundation for negotiations while protecting your best interests.
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