If you disappeared for thirty days, what breaks? That list is the discount.

What is the thirty-day test?

Leave the business for thirty consecutive days, take no calls, delegate no decisions in advance beyond what is already written down, and record what happened. Not what people say would happen. What happened.

It is a diagnostic rather than a holiday. The output is a written list in four columns: the decision that could not be made, the person who should have made it, the reason they could not, and whether the reason was authority, information or capability. Those three reasons have completely different fixes and completely different timelines, and owners routinely mistake one for another. A manager who is not permitted to approve a discount has an authority problem, solvable in an afternoon. A manager who does not know the margin on the account has an information problem, solvable in a quarter. A manager who could not have priced the account under any circumstances has a capability problem, solvable in a year if at all.

Thirty days is the interval because it is long enough to cross a month-end close, a payroll cycle, a customer escalation and at least one supplier problem, and short enough that most owners will actually do it. Two weeks tests nothing; a business can hold its breath for two weeks.

The reason to run it now rather than later is that the preparation window is longer than owners assume. Exit preparation should begin twelve to twenty-four months before a sale in order to improve valuations, and general partners report that underlying asset performance remains strong while capital market conditions continue to limit liquidity opportunities (EY, Global Private Equity Exit Readiness Study 2026, published 28 July 2026, survey fielded February to April 2026). An owner who starts preparing when they decide to sell has already spent the window.

What does owner dependence actually cost?

Two things, and the second is larger than the first. The first is a direct valuation reduction. The key-person discount is a recognized valuation mechanism, referenced in United States revenue rulings on the valuation of closely held businesses, and it is applied either as an entity-level reduction or as an uplift to the discount rate rather than as a negotiating concession. Advisory sources put the reduction in the range of 15 to 25 percent, and quote wider compression for lower-middle-market businesses. No regulator or professional body publishes a measured series for it, so every figure of that kind comes from a firm that advises on these transactions, and it should be read as a practitioner estimate rather than as data.

The second is the buyer pool, which is where the real money is. An owner-dependent business is not simply worth less to every buyer; it is unbuyable to several categories of buyer at any price. A lender underwriting an acquisition finance package prices key-person risk directly. A platform company doing an add-on is buying capability it intends to integrate, and capability resident in one departing person is not capability. That matters more than it used to, because 885 add-ons made up roughly three quarters of all US buyout transactions in the second quarter of 2026, against 289 platform deals (PitchBook, Q2 2026 US PE Breakdown, 6 July 2026). The largest single buyer category in the market is the one least able to buy an owner-dependent business.

Dependence also shows up in the shape of the consideration rather than the headline. Where a buyer cannot verify that the business runs without the seller, the response is usually not a lower price but more of the price held back: a longer transition commitment, a retention package, a larger earnout. Thirty-five percent of deals with closing payments at or below 25 million dollars already carry an earnout, and closer to one dollar in five of earnout consideration is ever paid (SRS Acquiom, 5 June 2026 and 7 July 2026). Owner dependence is the single most common reason a seller ends up holding that paper.

Which failure points map to which discount?

Four categories cover almost everything the test surfaces. Customer relationships held personally by the owner are the most expensive, because they convert into the concentration question a buyer already prices hardest. Many institutional acquirers hold hard internal rules on customer concentration and decline above the threshold rather than bidding lower, which means the relationship problem is a buyer-list problem before it is a price problem; the published discount ranges and their sourcing are set out in a companion article on this site.

Pricing and commercial authority is the second. If nobody but the owner can approve a price, a discount, a scope change or a contract term, then every commercial decision in the business queues behind one person, and a buyer models the queue rather than the decision. This is usually the cheapest category to fix and the one owners resist most.

Operational knowledge that exists only in the owner's head is the third: the supplier who has to be called personally, the machine setting nobody wrote down, the exception that gets handled by memory. This is the category a management presentation exposes fastest, because a buyer asks the operations lead and watches who answers.

Financial control is the fourth, and it compounds with everything else. An owner who is also the effective finance function produces a business where the numbers cannot be interrogated without them, which collides directly with a diligence process that is getting longer: 73 percent of senior investment bank executives expect diligence to become more complex over the next twelve to twenty-four months, and 57 percent of firms already seeing extension report one to three additional months (SRS Acquiom and Mergermarket, published 23 February 2026, surveying 150 senior US investment bank executives, fielded in Q4 2025).

How long does a fix take to register?

Longer than the fix itself, and this is the part owners most need to hear early. A buyer underwrites a trailing period. A change made this year is a claim until the trailing period contains enough of it to be evidence, which is the argument set out in full in the companion article on fixing concentration before a sale.

In practical terms the four categories register at different speeds. Delegated authority registers fastest, because it is documented and demonstrable: an approvals matrix, signed limits, and a record of decisions actually made by other people. Twelve months of that record is persuasive. Operational documentation registers next, because the artefacts exist and can be inspected. Customer relationship transfer registers slowly, because it needs renewal cycles to prove: a contract renewed by an account manager the owner did not attend is worth more than any organization chart. And a finance function registers only once it has produced a full year of closes without the owner, which is also the year that makes the thirty-six months of clean monthly financials worth having (Capstone Partners, Capital Markets Update, 4 June 2026).

One honest limitation. No published dataset measures what happens to revenue when an owner is absent, or how long a documented handover takes to register in diligence. Both are asked constantly and neither is published by anyone independent. What is published is the exit preparation window of twelve to twenty-four months, and it is a reasonable planning proxy for exactly this reason.

What do you do in the first ninety days?

Three things, in order. Write the approvals matrix. Every recurring decision, the limit at which it escalates, and the named person who holds it below that limit. Most owners discover in the writing that half the escalations exist by habit rather than by design, and those can be delegated the same week.

Second, name a deputy for each of the four categories and give them the decision rather than the recommendation. The distinction is the whole exercise. An owner who reviews every decision has moved the work and kept the dependence, and a buyer can see the difference in a single meeting.

Third, start the financial pack. Thirty-six months of clean, normalized monthly financial statements is the current preparation standard, along with a quality of earnings report commissioned early rather than in response to a buyer's findings, and the firms that closed successfully were described as having well-prepared financial packages that minimized re-trading risk (Capstone Partners, 4 June 2026). The pack is also the instrument that proves the delegation happened, because it shows the closes being produced by the finance function rather than by the owner.

Then run the test again in a year. The second reading is the one worth having, because the first reading measures the business as it was built and the second measures whether anything actually changed. An owner who can produce two lists, twelve months apart, with the second materially shorter, is holding the most persuasive readiness evidence available and it did not cost them anything.