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Basics

What is the difference between QoE and FDD?

Also known as: quality of earnings vs financial due diligence, QoE vs due diligence, QoE and FDD difference

Short answer

A QoE focuses on the sustainability of earnings, meaning how much of reported EBITDA is real and repeatable. Financial due diligence is the wider exercise that includes the QoE and adds net working capital, net debt, cash flow and other items that affect price and deal terms.

Updated November 2026

QoE and FDD, explained simply

People often use the two terms for the same piece of work. In most transactions the QoE is the core of financial due diligence, and the FDD adds the balance sheet and cash items that decide how the headline price becomes the price actually paid.

Agreeing the scope at the start avoids a report that answers the earnings question but leaves working capital and debt open.

QoE and FDD compared

Illustrative

The QoE answers the earnings question. FDD answers that question and the questions around it.

Side by side

Quality of earningsFinancial due diligence
PurposeShow how much of reported EBITDA is sustainableIdentify what a buyer is paying for and what protects the price
ScopeAdjustments, revenue quality, margins, proof of cashThe QoE plus net working capital, net debt and debt-like items, cash flow and other deal items
Main outputsAdjusted EBITDAAdjusted EBITDA, normalized working capital and peg, net debt and debt-like items
Used forPricing and lender underwritingPricing, purchase agreement terms and closing mechanics

Worked example

Alder Creek’s QoE shows adjusted EBITDA of $4.60 million. At 8.0x, that implies an enterprise value of $36.8 million. The wider FDD then sets the working capital peg and identifies the debt-like items that move the figure from enterprise value to the price paid for the shares.

Alder Creek Manufacturing, Inc. is a fictional company. All figures are illustrative.

Why it matters in a deal

The scope decides which questions are answered before signing. Leaving working capital or debt-like items out of the scope tends to move those discussions into the purchase agreement, where they are harder to resolve.

Red flags

  • A report called a QoE that does not cover working capital or net debt on a deal that needs both
  • A scope that is not written down
  • Different advisers working from different definitions of EBITDA

Frequently asked questions

Do I need both a QoE and FDD?
In most transactions the QoE is part of the FDD. The scope depends on the size of the deal, the lender’s requirements and the risks identified.
Can a QoE be done on its own?
Yes. Where the main question is earnings, the QoE is sometimes commissioned alone and further workstreams are added if the findings call for them.

Discuss your requirements with our team