Decision-Making Under Pressure in Business Acquisitions: The Traps and How to Avoid ThemNew Blog Post
Business acquisitions are high-stakes decisions made under conditions that systematically distort human judgement. Time pressure. Significant financial commitment. Emotional investment in an outcome. Incomplete information. The influence of advisers with their own interests. A counterparty who is simultaneously a partner and an adversary. A deal structure that feels increasingly irreversible the further into the process you travel.
These conditions do not bring out the best in human decision-making. They activate a set of cognitive patterns — heuristics and biases that are useful in low-stakes, high-frequency decisions but genuinely dangerous in high-stakes, low-frequency ones. The acquisition entrepreneur who understands these patterns can compensate for them. The one who does not is subject to them without knowing it, making decisions that feel right in the moment but that a dispassionate analysis later reveals to have been systematically distorted.
This post identifies the specific cognitive traps that affect acquisition decisions most frequently and most expensively, and the practical frameworks that produce better decisions precisely at the moments when the pressure to make poor ones is greatest.
Trap 1: Anchoring on the First Number You Hear
Anchoring is one of the most robustly demonstrated cognitive biases in decision-making research, and one of the most reliably exploited in commercial negotiation. The first number introduced into a negotiation — the asking price, the indicative multiple, the initial offer — has a disproportionate influence on every subsequent number that is discussed, regardless of whether that first number is well-founded or entirely arbitrary.
In acquisition negotiations, anchoring operates in both directions. A seller who opens at a high price — higher than they expect to achieve — pulls the eventual settlement upward, because even a buyer who negotiates hard from that starting point is negotiating against an anchor that has already framed the range. A buyer who has seen a comparable business trade at a specific multiple will anchor their valuation of the next business to that multiple, even if the businesses are not genuinely comparable.
The most expensive anchoring mistake in acquisitions is not price anchoring — it is earnings anchoring. When the seller presents a normalised EBITDA figure in the information memorandum, that figure becomes the earnings baseline against which the multiple is applied. Buyers who do not independently rebuild the normalised EBITDA from the source documents — and who instead adjust the seller's figure at the margin — are anchoring their valuation to a number the seller constructed. The result, as we explored in the Week 10 deal autopsy, is a model built on assumptions the buyer did not independently validate.
The deanchoring discipline
The practical counter to anchoring is to form an independent view before exposure to the seller's framing. In valuation terms: before reading the information memorandum's financial summary, calculate the normalised EBITDA yourself from the accounts. Before hearing the asking price, form a view — even a rough one — of what you believe the business is worth. Before entering any price negotiation, anchor yourself explicitly to your own calculation.
This does not mean refusing to be influenced by information the seller provides. It means ensuring that your own analysis precedes and is not replaced by the seller's presentation. The difference between being informed by their framing and being anchored to it is whether you have done the independent work first.
Trap 2: Overconfidence in Your Own Analysis
Acquisition entrepreneurs tend to be confident people. That confidence is not accidental — the willingness to make a significant financial commitment under uncertainty requires a certain temperament, and excessive timidity produces people who look at deals indefinitely without completing. But the same confidence that enables completion is a liability when it produces overconfidence in the quality of the analysis.
Overconfidence in acquisitions manifests most commonly in three specific ways:
Overconfidence in the financial model — believing that the projections are more reliable than they are, and therefore underweighting the scenarios in which the model is wrong
Overconfidence in due diligence — believing that the issues found are representative of all the issues that exist, and therefore underestimating the probability of post-completion surprises
Overconfidence in the post-acquisition plan — believing that the operational improvements planned will be easier to implement and more impactful than they prove in practice, and therefore overpaying based on a value creation thesis that is more fragile than it appears
The insidious thing about overconfidence is that it feels like competence. The buyer who is overconfident in their analysis does not experience it as overconfidence — they experience it as a well-founded belief that is supported by their knowledge and preparation. The challenge is that the things you do not know, by definition, do not register as gaps in your analysis. You do not know what you do not know.
The premortem — the single most useful decision-making tool in M&A
The premortem is a technique originally developed in academic research on team decision-making and subsequently adapted for business contexts. It works like this: before making a final commitment, imagine that the deal has completed and that, twelve months later, it has failed significantly. Not in a minor way — fundamentally. Then work backwards and identify the specific reasons why it failed.
The premortem forces the mind into a mode that overconfidence suppresses — it gives explicit permission to think of failure as the expected outcome rather than the exception, which surfaces the specific risks that optimistic analysis has minimised or ignored. In acquisition terms, the premortem questions are: what would need to be true for this business to perform significantly below the model? What are the specific assumptions I am most uncertain about? What would a hostile analyst say about this deal?
Done seriously — not as a cursory exercise but as a genuine attempt to identify the strongest case against proceeding — the premortem reliably identifies considerations that were present in the analysis but underweighted in the conclusion. It does not change the decision in every case. But it consistently improves the quality of the decision and the preparedness of the buyer for the scenarios that are identified.
Trap 3: The Confirmation Bias Spiral
Confirmation bias — the tendency to seek, interpret, and recall information in a way that confirms pre-existing beliefs — is the most pervasive cognitive trap in any prolonged decision process. In an acquisition, it operates across the entire timeline from initial enthusiasm to completion.
The confirmation bias spiral works like this. The buyer is initially attracted to the business — something about it appeals to their investment criteria, their sector knowledge, or their commercial instinct. That initial attraction creates a prior belief: this is a good deal. From that point forward, the information-gathering process is subtly shaped by that belief. Questions that might confirm the thesis are pursued vigorously. Questions that might challenge it are asked less persistently. Answers that are consistent with the investment case are remembered. Answers that are inconsistent are absorbed and rationalised.
By the time the buyer reaches heads of terms, they have typically processed hundreds of pieces of information about the business. The ones they remember most vividly are the ones that confirmed the investment case. The ones that challenged it have been explained away, attributed to the seller's nervousness, or simply not retained with the same clarity.
This is not dishonesty or laziness. It is a structural feature of how human memory and attention work when engaged with a question to which we already have a preferred answer. The solution is not to have no preferred answer — that would make decision-making impossible. The solution is to deliberately structure the process to force engagement with the case against the deal.
The red team approach
The most effective structural counter to confirmation bias in acquisition decision-making is the red team — a deliberate, formal exercise in which someone whose job is to argue against the deal is given full access to the information and asked to produce the strongest possible case for not proceeding.
In a solo acquisition process — where the buyer is the decision-maker and there is no investment committee or board that naturally plays this role — the red team exercise requires finding a trusted adviser or peer who is not emotionally invested in the deal and asking them explicitly: what is the strongest case against this acquisition, and what would you need to see addressed before you would be comfortable proceeding?
The quality of that conversation depends on the honesty of the buyer in providing all the relevant information — including the things that concern them — and on the willingness of the red team participant to be genuinely critical rather than supportive. This is harder to achieve than it sounds. The social dynamics of advising someone on a decision they clearly want to make push towards encouragement rather than challenge. The buyer needs to explicitly create permission — and incentive — for the red team to be adversarial.
Trap 4: Recency Bias and the Most Recent Data Problem
Recency bias is the tendency to weight recent information more heavily than older information, even when the older information is equally relevant or more reliable. In acquisitions, it manifests most commonly in the treatment of the most recent financial period — typically the last 12 months of trading — relative to the longer historical picture.
Sellers understand, consciously or not, that buyers weight recent performance heavily. The natural result is that the financial presentation in an IM and in due diligence emphasises recent performance — the strong last year, the improving trajectory, the pipeline of new business that is about to convert. Buyers who weight recent performance too heavily relative to the three to five year picture are systematically exposed to businesses whose recent improvement is genuine but not yet durable, or — in the worst cases — where the presentation has been managed to produce a favourable recent picture.
The specific recency bias problem that costs buyers the most money: buying on a trailing 12-month EBITDA that represents a peak or a one-off improvement, rather than on a normalised multi-year average. The Week 10 deal autopsy illustrates this precisely — a business where the most recent year's EBITDA, used as the basis for the multiple, was driven by sector tailwinds that were already moderating at the point of acquisition.
The multi-year normalisation discipline
The counter to recency bias in financial analysis is simple but requires discipline to apply consistently: never use a single year of earnings as the basis for a valuation multiple without understanding why that year is representative, and what the trajectory looks like over three to five years.
Build a normalised earnings bridge for each of the last three to five years. Understand the specific drivers of any year that is materially above or below the trend. If the most recent year is the strongest, establish what drove that strength — and ask specifically whether those drivers are structural or temporary. If they are temporary, the valuation should be based on the normalised multi-year average, not the peak year. If they are structural, the model should explain clearly why the recent improvement is durable rather than simply asserting it.
Trap 5: Loss Aversion at the Walk-Away Point
Loss aversion — the well-documented tendency to feel the pain of a loss more acutely than the pleasure of an equivalent gain — is the cognitive trap that is most dangerous at the walk-away decision point in any acquisition. By the time a buyer is considering walking away from a deal, they have typically invested significant money in advisers, significant time in the process, and significant emotional energy in the relationship and the opportunity. Walking away means experiencing all of that investment as a loss — and loss aversion makes that pain feel disproportionately large relative to the benefit of avoiding a bad deal.
The specific manifestation in acquisitions: the buyer who discovers a material problem in due diligence — a working capital issue, an undisclosed liability, a customer concentration risk that changes the investment thesis — and who then finds ways to rationalise proceeding rather than accepting the loss of their invested time and money. They adjust the model slightly to accommodate the issue. They accept the seller's explanation without sufficient scrutiny. They reduce the price modestly and convince themselves the adjustment is adequate.
Sometimes those rationalisations are correct — the issue is genuinely manageable at the adjusted price. But sometimes they are the product of loss aversion rather than analysis, and the buyer who should have walked away completes a deal that destroys more value than the sunk costs they were trying to protect.
The sunk cost reset
The counter to loss aversion at the walk-away point is a deliberate mental reset: treat the money already spent on advisers and the time already invested in the process as gone, regardless of whether you proceed or not. The only question is whether this deal — at this price, with this information, in this structure — is one you would choose to do if you were seeing it for the first time today.
That question is harder to answer honestly than it sounds. The emotional weight of the investment already made is real, and the mental discipline of setting it aside requires genuine effort. But it is the question that produces the right decision — and the best acquisition entrepreneurs ask it explicitly at every major decision point, not just the ones where they are considering walking away.
Building a Better Decision Process — Structurally
The cognitive traps described in this post are not character flaws. They are features of how human minds work under conditions of complexity, uncertainty, and emotional investment — conditions that describe every significant acquisition decision. The solution is not to try to eliminate the traps through willpower or self-awareness alone. It is to structure the decision process in ways that compensate for them systematically.
The structural elements that produce better acquisition decisions:
Form your own earnings view before reading the seller's presentation — deanchors the analysis from the seller's framing
Build a genuine downside case alongside the base case — compensates for overconfidence by forcing engagement with failure scenarios
Run a premortem before final commitment — surfaces specific risks that optimistic analysis has underweighted
Assign a red team role explicitly — creates structural permission and incentive for adversarial challenge
Use multi-year normalised earnings rather than the most recent period — compensates for recency bias in financial analysis
Apply the sunk cost reset at every major decision point — isolates the forward-looking decision from the backward-looking loss
None of these require extraordinary analytical capability. They require the discipline to implement them consistently — including and especially in the moments when the pressure to skip them is greatest.
The acquisition entrepreneurs who make the best decisions over a career are not the most intelligent or the most experienced. They are the ones who have built a process that produces good decisions reliably, regardless of the emotional state they are in or the pressure they are under when the decision is required.
Take the Acquisition Readiness Scorecard at www.DealwiseAdvisory.co.uk
Contact Steve at [email protected] to discuss a specific deal decision
WhatsApp Steve on +44 7930-857243
