Operating Margin

I. Formal Definition

Operating income as a percentage of revenue, representing profitability after operating expenses but before interest and taxes. Operating margin is the federation-recognised measure of operating profitability and is the principal indicator of cost discipline below the gross margin line. The federation requires operating margin to be published on a GAAP basis with non-GAAP reconciliation when relevant, including consistent treatment of stock-based compensation and acquisition-related expense under UFMS-001:3.2. Reclassifications between cost of revenue and operating expense are footnoted with quantification.

II. Etymology

A standard term of corporate accounting; the modern construction stabilised in the standardised income statement format adopted in the early twentieth century.

III. Federation Usage

Federation members publish GAAP operating margin with non-GAAP reconciliation. Stock-based compensation treatment is consistent across periods. Reclassifications between cost lines are footnoted with quantification under MEV-Annex:4.1.

IV. Related Terms

• gross-margin
• ebitda
• ebitda-margin
• net-profit

V. Authoritative Citations

• UFMS-001:3.2UFMS Article III - Operating Margin
• MEV-Annex:4.1MEV Annex IV - Operating Margin Reporting

VI. Citation in BibTeX

@misc{ifo4_glossary_operating_margin,
  title        = {{Operating Margin}},
  author       = {{IFO4 Federation Editorial Board}},
  howpublished = {{IFO4 Federation Glossary, slug \texttt{operating-margin}}},
  year         = {2026},
  url          = {https://ifo4.org/glossary/operating-margin},
  note         = {Category: Unit Economics; key: OperatingMargin}
}

VII. Challenge This Definition

Federation members and accredited practitioners may challenge any entry under TGS-002:1.7. Filed challenges are routed to the editorial board, triaged into the revision register, and resolved in writing on the public docket. The slug remains stable through any revision.