Red flags that survive a clean audit

An unqualified audit opinion says the accounts are free from material misstatement. It does not say the business is durable, that the revenue will recur, or that the price on the table is right. Buyers who treat a clean opinion as diligence completed are the ones who renegotiate after completion, from a much weaker position.

Every issue below can sit inside a clean set of accounts. None of them is fraud. All of them move price.

Related-party revenue

Related-party transactions are disclosed, not prohibited. The disclosure tells you they exist; it does not tell you what happens to the earnings if the relationship ends. When a meaningful share of revenue sits with a counterparty connected to the seller, the question is not whether it was properly recorded. It is whether it survives the transaction.

Establish the share of revenue and gross margin attributable to connected counterparties, not just the transaction values in the note.
Read the contracts. Look at term, renewal mechanics, termination rights and whether pricing sits at market or at something more accommodating.
Test what the margin looks like if that revenue is repriced to arm’s length.
Ask what contractually binds the counterparty after the seller exits. Frequently the answer is nothing.

Working capital timing

The most common value leakage in a private transaction is not in the profit and loss at all. It is in the working capital position at completion, and in the months either side of the reference date.

A seller preparing for a sale has ordinary commercial levers: collect receivables harder, let payables run, defer discretionary spend, ship early. None of it is improper. All of it flatters the completion balance and unwinds afterwards, at the buyer’s cost.

The defence is a monthly working capital series over at least two to three years, not a year-end snapshot. The seasonal shape should be visible, and the normalised level should be set against that shape rather than against the single most convenient month. Where the reference period sits outside the normal pattern, the mechanism should say so explicitly.

Customer concentration

Concentration is usually known and usually understated, because it is measured on revenue when it matters most on margin. A customer at a modest share of turnover can carry a disproportionate share of contribution, and losing it changes the business rather than trimming it.

Rank customers by gross margin contribution as well as revenue.
Check contract length, notice periods and whether the relationship is contracted at all or simply habitual.
Look at who owns the relationship. If it is the departing founder, it is not yet an asset of the company.
Model the loss of the largest one or two and see what remains of debt capacity.

Revenue recognition at the edges

Timing differences are legitimate accounting and can still distort a run rate. Multi-year contracts recognised early, milestone billing, capitalised costs that might reasonably have been expensed — each is defensible in isolation and each lifts reported earnings in the period a buyer is pricing off.

The test is simple: rebuild the last twelve months on a cash-converted basis and compare it to reported earnings. Where the two diverge persistently, the multiple is being applied to something the business does not actually generate.

Doing this in a two-week window

Short timetables are the norm, so the sequence matters more than the coverage. We start with the items that can change price rather than the ones that merely confirm the file: revenue quality, working capital shape, concentration, and the contracts underpinning the largest relationships. Ownership and documentation integrity run in parallel, because a defect there stops the transaction rather than pricing it.