The distinction between COGS and operating expenses (OpEx) shapes how investors evaluate a business's unit economics.
Where Each Appears on the P&L
Revenue $1,000,000
- COGS ($400,000) ← Direct production costs
= Gross Profit $600,000 ← Gross margin: 60%
- R&D ($100,000)
- Sales & Marketing ($200,000) ← Operating expenses (OpEx)
- General & Administrative ($80,000)
= Operating Income (EBIT) $220,000 ← Operating margin: 22%
What Goes Where
| Cost | COGS or OpEx? | Why |
|---|---|---|
| Raw materials | COGS | Directly in the product |
| Factory worker wages | COGS | Direct production labor |
| Sales rep salary | OpEx | Indirect — enables sales, not production |
| Customer support | Depends | If pre-sale or general: OpEx. If post-sale fulfillment for SaaS: COGS |
| Cloud hosting (SaaS) | COGS | Cost incurred per customer served |
| R&D | OpEx | Future product, not current delivery |
Why the Distinction Matters for Investors
High gross margin (low COGS ratio) signals pricing power and scalable unit economics. Operating expenses can be cut in a downturn; COGS is harder to reduce without cutting quality or volume. Investors compare gross margin first, operating margin second.