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Quality of Earnings Explained

Published September 2026 5 minute read

A quality of earnings analysis, often called a “QoE,” answers a question that a standard set of financial statements can’t fully answer on its own: how sustainable and reliable are this company’s earnings, really?

Why reported earnings aren’t the whole story

A company’s reported net income or EBITDA can be technically accurate and still be a poor predictor of what the business will actually generate going forward. One-time gains, unusual expenses, aggressive or inconsistent accounting choices, and revenue that isn’t likely to repeat can all inflate or distort a single year’s earnings without reflecting the business’s true, ongoing performance.

A QoE digs underneath the reported numbers to answer the real question a buyer (or a lender, or an investor) actually cares about: what would this business realistically earn in a normal year, run the way it’s actually going to be run going forward?

What a QoE actually looks at

Revenue quality. Is revenue growing because of durable factors, new customers, expanding relationships, real demand, or because of one-time events like a single large order that won’t repeat? Is revenue recognized appropriately and consistently period over period?

Margin trends. Are margins stable, improving, or eroding, and why? A margin bump driven by a temporary cost-cutting measure or a one-time favorable pricing arrangement tells a different story than genuine, sustainable margin improvement.

Adjustments and add-backs. Sellers often want to add back owner compensation above market rate, one-time legal fees, discretionary expenses, and similar items to show a cleaner earnings picture. Some of these adjustments are legitimate. Others are aggressive or double-counted. A QoE tests each one for whether it holds up.

Working capital trends. Unusual swings in receivables, payables, or inventory can signal timing games, collection problems, or operational issues that wouldn’t show up by just looking at the income statement.

Recurring vs. non-recurring items. Anything unusual, a lawsuit settlement, an asset sale, a one-time grant or rebate, gets separated out from the ongoing operating picture, so the earnings baseline reflects the business as it actually runs day to day.

Why buyers (and sellers) both benefit from this

For a buyer, a QoE reduces the risk of overpaying based on an earnings number that won’t repeat. It’s one of the most common and most valuable pieces of buy-side due diligence, precisely because it tests the assumption every offer is built on: that historical earnings are a reasonable proxy for future performance.

For a seller, getting ahead of this with a sell-side QoE, essentially doing the same analysis or a lighter version on your own business before a buyer does, can be just as valuable. It surfaces issues while there’s still time to address or explain them, rather than having a buyer discover a problem mid-negotiation and use it as leverage to renegotiate price.

A simple way to think about it

Reported EBITDA tells you what the business earned. Quality of earnings tells you what the business is actually likely to keep earning, once the noise, one-time items, and unsustainable factors are stripped out. That adjusted, normalized number, not the raw reported figure, is usually what a purchase price actually gets built around.

ProDelta Advisors connects clients with the right quality of earnings providers and quarterbacks the process from engagement through delivery, keeping it efficient for both buyers and sellers navigating a transaction.

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