Quality of Earnings & Financial Due Diligence
Quality of earnings (QoE) converts a target's reported EBITDA into the number a buyer is actually paying a multiple on. This guide covers the standard adjustment categories, how to build a defensible EBITDA bridge, how working capital targets get set and manipulated, the debt-like items sellers do not always disclose, and a worked example showing how a $640,000 adjustment becomes $3.84m of purchase price.
What quality of earnings actually measures
Quality of earnings (QoE) is the analysis that converts reported EBITDA into a number that reflects the cash-generating capacity of the business a buyer is actually acquiring. It is the single highest-leverage workstream in financial diligence, because the output — adjusted EBITDA — is multiplied by the deal's valuation multiple. A $500,000 adjustment on a 6x multiple is a $3 million swing in price, which is why QoE receives more scrutiny per hour than any other financial workstream.
QoE is not an audit and does not opine on GAAP compliance. It asks a narrower, more commercial question: if this business continues exactly as it has been run, what EBITDA will it actually produce next year, on a standalone basis, run by someone other than the current owner?
The standard adjustment categories
| Adjustment | What it corrects for | Where it goes wrong |
|---|---|---|
| Owner/related-party compensation normalisation | Owner salary and benefits reset to market rate for the role | Owner is under- or over-paid relative to a genuine market comparator, distorting reported margin either direction |
| One-time and non-recurring items | Legal settlements, relocation costs, one-off consulting, restructuring | Recurring costs relabelled as one-time, or genuinely one-time items excluded inconsistently year to year |
| Related-party transactions | Revenue or expense with affiliates on non-market terms | Related-party revenue treated as arm's-length when pricing was set to flatter the seller's numbers |
| Discontinued operations | Removing results from a business line already exited | Costs of exit lingering in the base period are not backed out consistently |
| Accounting policy normalisation | Aligning revenue recognition, inventory and depreciation methods to a consistent standard across the period analysed | A policy change mid-period inflates or depresses one year relative to the others without disclosure |
| Pro forma adjustments | Full-year effect of a mid-period acquisition, new contract, or facility opening | Run-rate assumed without evidence the new revenue or cost has actually stabilised |
The test that separates a real adjustment from an aggressive one. A legitimate add-back has documented, contemporaneous support — an invoice, a board minute, a termination agreement — and a clear reason it will not recur. An adjustment supported only by management's assertion that "this won't happen again" should be treated with proportionally more scepticism the larger it is.
Building the EBITDA bridge
The bridge should be built as a walk from reported EBITDA to adjusted EBITDA, with every line independently supportable, rather than presented as a single adjusted number. A defensible bridge looks like this in structure:
- Reported EBITDA per the financial statements, tied out to the trial balance.
- Plus/minus owner compensation normalisation.
- Plus one-time and non-recurring items, each with supporting documentation.
- Plus/minus related-party transaction adjustments to market terms.
- Plus/minus accounting policy normalisation.
- Plus pro forma adjustments for completed, verifiable changes only.
- Equals adjusted EBITDA.
Run the bridge for at least three fiscal years plus the trailing twelve months (LTM), not a single period. A single-year bridge hides trend: an adjustment that recurs every year is not one-time regardless of how it is labelled, and running multiple years is the fastest way to catch that.
Net working capital: setting and testing the target
Deals are typically structured cash-free, debt-free, with a normalised working capital target built into the purchase price. Getting this target wrong moves cash at closing in a way most buyers underestimate.
How the target is usually set
The standard methodology averages net working capital (current assets excluding cash, less current liabilities excluding debt) over a trailing twelve-to-twenty-four month period, adjusted to remove seasonal peaks and troughs so the target reflects a normal operating level rather than a snapshot. Twelve months is a minimum; twenty-four is preferable for any business with seasonality.
Where sellers manage the number
Working capital is the line item most susceptible to pre-sale management, and it is worth testing for deliberately in the months immediately before a process: receivables collected unusually hard, payables stretched beyond normal terms, inventory drawn down rather than replenished. None of these changes the business; all of them flatter the closing cash position at the buyer's expense if the target is set off a manipulated period.
| Component | What to test |
|---|---|
| Accounts receivable | Days sales outstanding trend; aging schedule; collectability of balances over 90 days |
| Inventory | Turnover trend; obsolescence reserve adequacy; physical count reconciliation |
| Accounts payable | Days payable outstanding trend against historical vendor terms |
| Accrued liabilities | Completeness — unrecorded accruals are a common source of understatement |
Net debt and debt-like items
Net debt reduces the equity purchase price dollar for dollar, which makes its completeness the highest-stakes line item in the whole analysis after adjusted EBITDA itself. Beyond interest-bearing borrowings, several items behave like debt without being labelled that way, and sellers do not always volunteer them:
- Deferred and contingent consideration from prior acquisitions the target itself made.
- Unfunded pension or post-retirement obligations.
- Capitalised lease obligations not already reflected in reported debt.
- Accrued but unpaid bonuses and transaction-related payouts triggered by the sale itself.
- Unremitted payroll and sales tax beyond the normal payment cycle.
- Customer deposits or deferred revenue where the cost of future delivery has not yet been incurred.
- Outstanding litigation settlements agreed but not yet paid.
The discipline is to request a complete net debt schedule from the seller and independently test it against the general ledger, rather than accepting a summary figure. Each omitted item is a direct, dollar-for-dollar transfer of value from buyer to seller at closing.
Worked example
A target reports $4.0m EBITDA. QoE finds: $250k of owner compensation above market rate, $180k of legal costs tied to a single non-recurring dispute, $120k of related-party rent above market terms, and a $90k full-year effect of a contract signed mid-year. Adjusted EBITDA comes to $4.64m.
| Line | Amount |
|---|---|
| Reported EBITDA | $4,000,000 |
| + Owner compensation normalisation | $250,000 |
| + Non-recurring legal costs | $180,000 |
| + Related-party rent adjustment | $120,000 |
| + Pro forma contract effect | $90,000 |
| Adjusted EBITDA | $4,640,000 |
At a 6x multiple, that $640,000 of adjustments is worth $3.84m of purchase price — which is why each line needs documentation, not assertion, and why a buyer's diligence team tests every adjustment independently rather than accepting the seller's own bridge.
Frequently asked questions
What is quality of earnings in due diligence?
Quality of earnings (QoE) is the analysis that converts a target's reported EBITDA into an adjusted figure reflecting the cash-generating capacity of the business on a standalone, ongoing basis. It removes one-time items, normalises owner compensation and related-party transactions to market terms, and corrects for accounting policy changes, producing the EBITDA figure that a valuation multiple is actually applied to.
How is net working capital target set in an M&A deal?
The standard methodology averages net working capital over a trailing twelve-to-twenty-four month period, adjusted to remove seasonal peaks and troughs, producing a target that reflects normal operating levels rather than a single snapshot. Actual working capital at closing is then compared to the target, with the buyer's purchase price adjusted up or down for the difference.
What counts as a debt-like item in net debt calculations?
Beyond interest-bearing borrowings, debt-like items include deferred and contingent consideration from prior acquisitions, unfunded pension obligations, capitalised lease obligations, accrued but unpaid transaction bonuses, unremitted payroll or sales tax, customer deposits where future delivery cost has not been incurred, and outstanding litigation settlements. Each omitted item transfers value from buyer to seller at closing.
How much does an EBITDA adjustment actually affect purchase price?
Every dollar of adjusted EBITDA is multiplied by the deal's valuation multiple, so a relatively small adjustment has an outsized effect on price. A $500,000 adjustment at a 6x multiple moves the purchase price by $3 million. This is why QoE, despite covering a single line item, typically receives more scrutiny per hour than any other financial diligence workstream.