What Is SG&A?
Selling, general and administrative expense sits on the income statement below gross profit and captures the cost of running the business rather than making the product. The selling component includes sales force compensation, commissions, advertising, and marketing programs. The general and administrative side covers corporate functions such as executive management, finance, human resources, legal, information technology, office rent, and insurance.
Presentation varies by company. Some break out sales and marketing separately from G&A, a convention common among software companies, while others report a single combined SG&A line. Costs directly attributable to production, such as factory labor and materials, belong in cost of goods sold instead, and research and development typically gets its own line. Reading the footnotes matters because classification choices differ across peers.
How Analysts Use It
The standard metric is SG&A as a percentage of revenue, tracked over time and benchmarked against competitors. A retailer running SG&A at 20% of sales against peers at 25% has a structural cost advantage worth investigating. Because a meaningful portion of SG&A is fixed, the ratio also reveals operating leverage: when revenue grows faster than SG&A, each incremental sales dollar drops through to operating income at a higher margin.
In a three-statement model, SG&A is usually projected as a percentage of revenue, sometimes split into fixed and variable components for more precision. Consider a company growing revenue from $1.0 billion to $1.2 billion while holding SG&A flat at $200 million: the expense ratio falls from 20% to about 16.7%, and that improvement flows straight into operating margin expansion.
Why It Matters in Deals and Interviews
SG&A is where most M&A cost synergies live. When two companies combine, duplicated headquarters functions, overlapping sales organizations, redundant executive teams, and doubled-up public company costs can all be consolidated. Merger models typically quantify these synergies as a percentage of the target's SG&A base, and announced synergy targets are a headline number in deal communications. Activist investors likewise target bloated SG&A when arguing a company is undermanaged.
For interview preparation, know where SG&A sits in the income statement walk from revenue to operating income and how a change flows through all three statements. A $10 million SG&A increase reduces pre-tax income by $10 million and net income by $7.9 million at a 21% tax rate, with the effect carrying into retained earnings and operating cash flow. Understanding which SG&A components are fixed versus variable is also central to margin questions.
