A business whose plan depends on people the buyer is not acquiring is worth less, and diligence will find out.
Why it matters when the plan changes
Owners prepare the numbers and the narrative and leave the organisation as it is. A buyer then discovers that key relationships sit with the departing owner, that decisions have never been made below a certain level, or that a critical role has no successor. This is what due diligence, the investigation a reasonable buyer is expected to undertake before committing, is built to surface: not just financial risk but concentration, a single point of failure where the plan assumes a team. Each finding is a discount applied at the point of least negotiating advantage.
The tension is that fixing the organisation takes longer than preparing the financials. Building a second person into a customer relationship, or moving decisions down a layer, are matters of quarters, not weeks, and they mirror the logic behind key person cover, built because replacing or training one person takes time. Owners who start preparing six months before a process can fix the accounts and not the thing that will be found.
In practice
A founder-led business goes to market with clean accounts and strong growth. Diligence finds that pricing, key accounts and the product roadmap all run through the founder, who intends to leave. The price reflects it. Two years of distributing those three things would have cost less than the discount did.
Evidence
Due diligence is the investigation a reasonable buyer undertakes before committing, which is where organisational dependencies surface.
Due diligence, Wikipedia (2026)Key person exposure carries defined consequences including the cost of replacing the person and covering the gap.
Key person insurance, Wikipedia (2026)
What it cannot tell you
Exit readiness describes whether a business can be sold at the owner's expected value; it does not price the business or guarantee a buyer will pay that price. It is silent on market conditions, buyer appetite and timing, all of which move valuation independently of how well the organisation would survive the owner's departure.
Questions
Whether the plan can be delivered by the people who remain. Due diligence, Wikipedia (2026) defines it as the investigation a reasonable buyer undertakes before committing, and that is exactly what gets tested: decisions distributed below the owner, customer relationships held by more than one person, a working management layer, and a successor for every critical role.
Two years or more for the organisational half, because distributing relationships and moving decisions down a layer take that long to become real. Six months is enough to prepare accounts and a narrative and not enough to change how the business actually runs.
Concentration in the departing owner: pricing, key accounts, supplier relationships and the roadmap running through one person who is leaving. It carries the exposure that Key person insurance, Wikipedia (2026) describes as financing the recruitment and training of a replacement.
Yes, which is why it is deferred. Distributing decisions means other people making calls the owner used to make, for two years before any sale. That discomfort is the actual cost of exit readiness, and it is paid either then or in the price.
Overlapping. Professionalisation is building management capability and process as a business grows, which happens whether or not a sale is contemplated. Exit readiness is the subset that a buyer will examine, plus the parts of the narrative and record a process requires.