Reading the Margin Waterfall
The three margins form a waterfall — each step removes another cost layer. Gross margin removes COGS; operating margin additionally removes operating costs; net margin removes financing and taxes. The gap between each margin tells you where costs are concentrated.
A high gross margin that collapses to a low operating margin signals excessive operating expenses (often sales, marketing, or R&D spend). A high operating margin that shrinks at net margin signals high debt service. Each gap points to a different management priority.
The Margin Diagnostic
Use margin analysis as a diagnostic: High GM, low OM → operating cost problem. Low GM → pricing or COGS problem. High OM, low NM → leverage / tax problem. All three strong → excellent business. Improving NM without improving GM → cost cutting that may harm growth. The relationships between the three margins tell a story.
Margin Improvement Priorities
The highest-leverage margin improvement is usually gross margin. A 10-percentage-point gross margin improvement (e.g., from 60% to 70%) flows directly through to operating and net margin — it's not absorbed by any other cost layer. This is why pricing strategy and COGS optimisation deserve disproportionate attention.
Operating margin improvement through cost discipline is the second lever. Reducing operating expenses as a percentage of revenue (through productivity gains as revenue scales) is the engine of operating leverage — the mechanism by which growing SaaS businesses improve from −20% to +20% operating margin as they scale.
70–80%
Target gross margin for SaaS
20–25%
Target operating margin for mature SaaS
10–15%
Target net margin for profitable businesses
GM first
Gross margin is the highest-leverage improvement