What is a Quality of Earnings (QofE) Audit in a Business Sale?

The 30-Second Definition

A Quality of Earnings (QofE) assessment is a highly rigorous financial analysis commissioned during due diligence to test the sustainability, repeatability, and accuracy of a company's reported earnings. Unlike a standard statutory audit, which merely checks if historical accounts are legally compliant, a QofE audit proves whether your business's profits are driven by normal operations or artificial, non-recurring spikes.

Why a Buyer's QofE Audit Directs the Deal

For businesses in the £1M–£50M bracket, the QofE report is the single most critical document in the Virtual Data Room. Institutional buyers and private equity firms use it to stress-test your Adjusted EBITDA. If the report uncovers that your numbers are accurate but fragile, the buyer won't necessarily walk away from the deal—instead, they will alter the deal structure, forcing you to accept an Earn-Out or vendor loan note rather than 100% cash up front.

The Core Metrics Scrutinised in a QofE

The buyer’s corporate finance advisors will rebuild your trailing financial records on a monthly, granular baseline. They look directly at three operational vulnerabilities:

- Customer Concentration Risk: If a single client represents more than 15% of your turnover, or your top five clients generate over 50% of your profitability, your earnings have low "quality". The buyer knows that losing one contract post-acquisition could devastate the company's value. 

- Gross Margin Sustainability: The audit tracks your direct costs against individual product or service lines over a 36-month horizon. If your recent profit spike was driven by a temporary drop in raw material costs or a one-off high-margin contract that cannot be replicated, those earnings will be stripped out of the core valuation baseline.

- Run-Rate Adjustments: If you hired three expensive senior executives halfway through the year, your historical statutory accounts only show six months of their salaries. The QofE will calculate a full 12-month "annualised run-rate" for those overheads, lowering your forward-looking EBITDA projection.

The Strategic Defense: Vendor Due Diligence (VDD)

The absolute worst time to find out your gross margins are slipping or your customer concentration is too high is when a buyer's accountant presents it to you mid-deal. To maintain complete control of the narrative, many sellers commission their own corporate finance advisors to run a Vendor QofE before going to market. This allows you to spot anomalies, present clean data, and defend your pricing strategy aggressively.