What key person risk means in a business valuation
Key person risk is the risk that a business's earnings depend materially on one individual — an owner, founder or specialist staff member — who is not contractually bound to stay, such that their departure through sale, illness, death or simply walking away would measurably reduce what the business earns. It is assessed under the same market value standard that governs an Australian valuation generally: what a willing but not anxious buyer would pay a willing but not anxious seller, the Spencer v Commonwealth (1907) test still applied consistently with IVS 104 and, for valuations prepared under APES 225, by a member bound by its independence and evidence requirements. A buyer stepping into that hypothetical transaction is buying future cash flows, and if those cash flows are concentrated in one person, the buyer prices that concentration in. Key person risk is not a discrete line item like a minority discount; it shows up wherever earnings, client relationships, supplier terms, technical knowledge or regulatory standing sit with an individual rather than the entity. It is the single most common value-destroyer we see in private Australian businesses, and unlike goodwill quality or market conditions, it is largely within the owner's control to reduce before a valuation date or a sale process.
How much key person risk reduces business value
There is no ATO-published table or industry-standard percentage for key person discounts, and any valuer who quotes one without reference to the specific business is asserting, not evidencing. In practice the reduction is derived one of two ways, and a defensible file states which was used and why.
- ·With-and-without earnings analysis. The valuer models maintainable earnings under two scenarios: earnings as reported, and earnings adjusted for a realistic transition period — client attrition, a temporary revenue dip while a successor beds in, the cost of replacement management or a locum, and any loss of preferential supplier or lender terms tied to the individual. The difference between the two maintainable earnings figures is capitalised at the business's multiple, producing a dollar value for the risk rather than an arbitrary percentage haircut. This is the more rigorous approach and the one Comprehensive and Defensible engagements default to where dependence is material.
- ·Multiple or discount-rate adjustment. Where earnings-level modelling is not practical — thin data, multiple overlapping risk factors, or a business valued primarily on a market multiple rather than CME or DCF — the valuer instead widens the capitalisation rate or trims the selected multiple relative to the comparable set, on the basis that comparable transactions typically involve businesses without the same degree of single-person dependence. This is a blunter instrument and the report should say so; it is a reasonable fallback, not the preferred method, because it cannot show its working the way an earnings model can.
- ·Cross-checking against the comparable evidence itself. Where the multiple is drawn from transactions of similarly structured owner-operator businesses, part of the market discount for key person dependence may already be embedded in the comparable multiple — applying a further standalone discount on top risks double-counting. A supportable file addresses this explicitly rather than stacking adjustments without reconciling them.
How to tell if a business has key person risk
A business has material key person risk when its revenue, relationships or operations cannot continue unchanged without one specific individual, and the discount cannot be sized without first establishing, with evidence, how dependent the business actually is. Assertion ("the owner is obviously critical") is not diagnosis. A proper assessment works through three lenses.
- ·Revenue attribution. What proportion of revenue is directly attributable to relationships, technical delivery or business development the key person personally controls? This is tested against client/revenue concentration records, referral source data and, where available, account-manager or biller-level revenue splits — not estimated from memory.
- ·Relationship mapping. Which clients, referrers, suppliers, financiers and staff deal exclusively or primarily with the key person, with no other point of contact in the business? A relationship held solely by one individual, with no secondary contact ever introduced, is a materially higher risk than one where the client already knows a second team member.
- ·Decision bottlenecks. Which operational, pricing, hiring, technical sign-off or strategic decisions cannot proceed without the key person specifically? This is diagnosed through process mapping — what actually happens, in practice, when the person is on leave for two weeks — not through an org chart that assumes delegation exists because a title says it should.
Illustrative discount magnitudes by dependence severity
These are indicative bands drawn from typical Australian private-business practice, not a lookup table. The concluded figure in any engagement has to be argued from the specific business's revenue attribution, relationship mapping and succession evidence — a bare assertion that "20% is standard" would fail the same scrutiny this article describes for other unsupported discounts.
- ·Low dependence — documented second-tier management, systemised delivery, client relationships spread across multiple staff, owner works materially in the business but is not the sole point of failure: typically a modest adjustment, often absorbed within normal earnings normalisation rather than a separate discount.
- ·Moderate dependence — owner is the primary but not sole relationship holder for key accounts, some documented processes exist, a second-in-charge exists but is not yet tested running the business unsupervised: a discernible discount to maintainable earnings or a step down in the selected multiple, reasoned from the specific transition costs identified.
- ·High dependence — owner holds substantially all key client and supplier relationships personally, limited or no documented systems, no credible second-in-charge, technical delivery or regulatory standing (e.g., a licence or registration) sits with the individual alone: a materially larger discount, and in some cases a conclusion that the business's goodwill is substantially personal rather than transferable, which affects methodology choice as much as the discount magnitude.
Personal goodwill versus enterprise goodwill
Severe key person dependence eventually raises a more fundamental question than "what discount applies" — whether the goodwill being valued is transferable at all. Where earnings genuinely follow the individual rather than the entity (a solo professional practice with no institutional client base, a tradesperson valued substantially on personal reputation), the analysis may conclude that a meaningful share of goodwill is personal goodwill that does not transfer on sale, rather than enterprise goodwill that a buyer is actually acquiring. This distinction changes which methodology is appropriate and what a buyer would rationally pay, and it is a separate analytical step from sizing a key person discount within otherwise transferable earnings — the two are often confused but they answer different questions.
The 12-month mitigation playbook
Key person risk is unusual among value discounts in that most of the fix is operational, not financial, and most of it is achievable within a year — which matters if a sale, restructure or valuation date is on the horizon.
- ·Build a genuine second tier. Identify and develop at least one person capable of running client delivery and day-to-day operations without the owner for an extended period, and test it — an actual two-to-four-week absence, not a hypothetical one. A second-in-charge who exists on paper but has never run the business unsupervised has not reduced the risk a valuer will price.
- ·Document the systems. Capture pricing logic, delivery processes, supplier terms and technical know-how in written procedures rather than leaving them in the owner's head. This is unglamorous work, but it is the single most direct evidence a valuer can point to when arguing dependence has genuinely reduced.
- ·Spread client and referrer relationships deliberately. Introduce a second point of contact for key accounts well before any transaction is contemplated — clients and referrers who already know another team member are measurably less likely to be modelled as at-risk revenue.
- ·Formalise what can be formalised. Employment agreements with retention or non-compete terms for other senior staff, documented delegated authorities, and where relevant a succession or buy-sell agreement between owners all give a valuer (and a buyer) something concrete to point to rather than an assurance.
- ·Use insurance as partial cover, not a substitute. Key person insurance compensates the business financially for the disruption of losing the individual — it can fund a locum, a search process or working capital through a transition. It does not, on its own, replace the relationships, systems or knowledge that were concentrated in that person, and a valuer will not treat a policy as eliminating the underlying operational dependence. It is a genuinely useful mitigant for the financial shock; it is not a substitute for the diagnostic work above.
What buyers actually ask to smoke out dependence
Key person risk is not just a valuation-day concept — it is one of the first things a sophisticated buyer's due diligence team probes, because it directly affects what they are willing to pay and how they structure the deal. Owners preparing for sale should expect, and be able to answer, questions in this vein: which staff member deals directly with each of the top ten clients, and would that client follow the staff member elsewhere? What happens to pricing, delivery and quality control if the owner is unavailable for a month? Are there written procedures for core processes, or does the knowledge exist only with named individuals? What retention arrangements exist for senior non-owner staff, and do they survive a change of control? Is any material licence, accreditation or regulatory standing held personally by the owner rather than the entity? A business that can answer these cleanly, with documentation rather than reassurance, is negotiating from a materially stronger position — and often this is exactly where an earn-out or vendor finance structure gets proposed, as the buyer's way of pricing the residual risk rather than a straight discount off the headline price.
Where this fits in a valuation engagement
Key person dependence is assessed as a matter of course in Comprehensive engagements (from $3,995 + GST, 15–25 business days) wherever the entity is owner-operated, and the with-and-without earnings analysis is standard practice in the Defensible Valuation File (from $8,995 + GST, 25–35 business days) for matters where the concluded value is likely to be tested — a small business CGT concession claim, a related-party transfer, or a sale process. Where the discount magnitude itself is the contested question, or where a personal-versus-enterprise-goodwill split materially changes the outcome, the Valuation Range & Scenario Review engagement (from $12,995 + GST, 30–45 business days) maps the concluded value across the range of defensible dependence assumptions, with the most supportable position identified and reasoned. As with every discount in our reports, the figure is derived from the evidence specific to that business — not selected to produce a target outcome, and not asserted without a working file behind it. Prismi is not a registered tax agent and does not provide tax advice — how a key person discount is applied to a CGT concession claim or a related-party transfer is a matter for your accountant or tax adviser.