Why Deals Collapse After Heads of Terms

In short: Why Deals Collapse After Heads of Terms

Deals most often collapse after Heads of Terms because due diligence uncovers undisclosed issues, trading performance dips during the process, or the seller is not prepared for the pace of scrutiny that follows. Most of these causes can be reduced with preparation before Heads of Terms are signed.

What this article covers

What Heads of Terms actually commit you to
Due diligence uncovers something that was not disclosed
Trading performance changes during the process
The seller is not ready for the pace of the process
The seller changes their mind or their terms
Buyer financing falls away
Legal drafting reopens commercial points
How sellers reduce the risk of collapse

Signing Heads of Terms sets out the price and key conditions both parties expect to complete on, but it is not a binding contract and does not guarantee the deal will close. Most SME transactions that fail do so after this point, once due diligence, legal drafting and financing conditions test whether the business matches what was represented. The period between Heads of Terms and completion is where a deal is actually won or lost, and the risk is highest for sellers who treat signing as the end of the process rather than the start of the most demanding phase.

What Heads of Terms actually commit you to

Heads of Terms (sometimes called a letter of intent or memorandum of understanding) record the agreed price, structure and timetable for a sale, along with any conditions such as exclusivity or a due diligence period. Most clauses are not legally binding, with the common exceptions of confidentiality and exclusivity. That means either side can still walk away, renegotiate price, or add new conditions once detailed scrutiny begins, which is precisely why the following stages need careful management.

Due diligence uncovers something that was not disclosed

Buyers accept normal commercial imperfections in an SME, but they react badly to information that contradicts what was presented earlier in the process. Undisclosed liabilities, inconsistent management accounts, customer concentration that was understated, or contracts that turn out to be terminable on change of control all raise the same question in a buyer's mind: what else has not been mentioned. The result is usually a reduced offer, new conditions, or withdrawal, and thorough due diligence preparation before Heads of Terms are even discussed removes most of this risk.

Trading performance changes during the process

A sale process can run for several months from Heads of Terms to completion, and buyers typically track monthly management accounts throughout. A material decline in revenue or margin during this window unsettles buyers and their funders, and it commonly leads to price renegotiation rather than outright collapse, though a severe fall can end the deal entirely. Sellers who keep the business running normally, rather than diverting management attention entirely to the transaction, are less exposed to this risk.

The seller is not ready for the pace of the process

Buyers and their advisers work to information requests, deadlines and follow-up questions, and a seller who is slow to respond, cannot locate requested documents, or has not organised its records signals disorganisation that buyers read as risk. Momentum matters because both sides are incurring cost and advisory time as the process continues, and a stalled response undermines confidence even where the underlying business is sound. A well-prepared data room, assembled in advance, is the single most effective defence against this.

The seller changes their mind or their terms

Selling a business is an emotional decision as much as a financial one, and some owners find that the reality of scrutiny under due diligence brings second thoughts. Renegotiating terms that were already agreed, becoming defensive when buyers ask difficult questions, or introducing new demands after Heads of Terms are signed damages trust that is hard to rebuild. Owners who have thought through their exit planning and personal readiness before entering a process are considerably less likely to behave this way once pressure builds.

Buyer financing falls away

Many SME acquisitions are funded in part by external finance, whether bank debt, asset-based lending or private equity co-investment, and that funding is rarely committed unconditionally at Heads of Terms. If diligence findings, valuation caution or wider credit conditions cause a lender to withdraw or reduce facilities, the buyer may be unable to proceed on the agreed terms, or at all. This risk sits largely with the buyer, but sellers can reduce their exposure by understanding a buyer's funding structure and confirming commitment levels before granting exclusivity.

Legal drafting reopens commercial points

The Share Purchase Agreement translates the commercial deal into binding legal terms, covering warranties, indemnities, restrictive covenants and any working capital adjustment or earn-out mechanism. Points that felt settled at Heads of Terms stage can resurface here, particularly around the scope of warranties and what happens if a warranty claim is made after completion. Agreeing the principles of these mechanisms clearly at Heads of Terms, rather than leaving them vague, reduces the scope for late-stage disagreement.

How sellers reduce the risk of collapse

None of these steps guarantee completion, since some causes of collapse sit with the buyer rather than the seller. What preparation does achieve is removing the avoidable causes, so that if a deal does not proceed, it fails for a genuine commercial reason rather than a gap in the seller's own readiness. Owners approaching this stage should read the negotiating a business sale guide alongside their Heads of Terms discussions, and review their business sale timeline so that the diligence period is planned for rather than absorbed as a surprise.

A practical next step.

Most owners start with a conversation and a considered view of value. Both are confidential, and neither commits you to going to market.

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