Understanding the Letter of Intent (LOI) and Heads of Terms

The 30-Second Definition

A Letter of Intent (LOI)—frequently referred to as Heads of Terms (HoT) in the UK—is the foundational document signed by a buyer and seller that outlines the principal commercial, financial, and structural terms of a proposed acquisition. While the majority of an LOI is legally non-binding, it serves as the definitive roadmap for the transaction. Signing it signals the formal end of preliminary negotiations and the beginning of intensive due diligence inside the deal room.

The Exclusivity Trap: Where Leverage Shifts

Many business owners view the Heads of Terms as a casual "agreement in principle" and sign it quickly to get the deal moving. This is a critical strategic mistake.

While the valuation and transaction structure outlined in the LOI are non-binding, the document almost always contains a legally binding Exclusivity Clause (sometimes called a lock-out period). This clause legally prevents you from speaking to, negotiating with, or soliciting offers from any other competitive buyers for a set timeframe—typically 45 to 90 days.

The moment you sign that clause, your market leverage vanishes. You are locked in a room with a single buyer. If your LOI contains vague financial definitions, the buyer's corporate finance team will use the exclusivity period to pick apart your balance sheet and chip your valuation, knowing you cannot walk away to entertain an alternative offer without breaching a legal contract.

What Must Be Locked Down Before Signing Exclusivity

To defend your enterprise value, an LOI must be highly detailed. Never sign an offer that simply states a headline price without explicitly defining the following transaction parameters:

- The Exact Valuation Multiple and Metric: It must specify exactly what baseline metric the price is built upon (e.g., "An 8x multiple applied to an Adjusted EBITDA of £2.5M").

- The Payment Grid: The exact split of cash at completion, deferred consideration, vendor loan notes, and earn-out structures must be written in stone.

- The Balance Sheet Benchmarks: The document must state that the deal is on a Debt-Free, Cash-Free baseline and define the exact formula that will be used to calculate the rolling 12-month Net Working Capital Peg.

Audit the Offer Before You Lock Yourself In

Entering exclusivity with a vague LOI is the single biggest cause of deal failure in the mid-market. Once a buyer senses you are fatigued by the due diligence process and locked out from the market, they will tighten the commercial screw.