Definition
Gross margin is the percentage of revenue remaining after subtracting the direct costs of delivering your product or service (cost of goods sold).
Formula: Gross Margin = (Revenue − COGS) ÷ Revenue × 100
Why It Matters
Gross margin is the first filter for business viability. If your gross margin is too low, no amount of growth will make the business profitable — you're losing money on every sale before you even pay for sales, marketing, or overhead.
It's also the number that tells you how much room you have for everything else. A 70% gross margin means $0.70 of every dollar is available for sales, marketing, R&D, admin, and profit. A 25% gross margin means you're working with $0.25 — which forces a completely different operating model.
Example
A SaaS company generates $800K in annual revenue. Their COGS includes $80K in hosting, $30K in third-party API costs, and $10K in customer onboarding labor — $120K total. Gross margin = ($800K − $120K) ÷ $800K = 85%. That's strong for SaaS. But if they sign a large enterprise client requiring dedicated infrastructure at $50K/year, COGS jumps to $170K and gross margin drops to 79%. Still healthy, but worth monitoring — especially if more enterprise deals follow the same pattern.
Benchmarks
Typical gross margins by industry: SaaS and software sit at 70-85%. Professional services (agencies, consulting) range from 50-70% depending on utilization. E-commerce lands at 30-50%. Manufacturing and distribution run 15-35%. Construction typically operates at 20-35%.
Within your industry, gross margin also varies by product or service line. An agency might earn 65% margin on retainer work but only 40% on one-off projects. Understanding margin by offering lets you prioritize what to sell more of.
What to Watch For
- Declining margin at stable revenue. This usually means your COGS is creeping up — vendor price increases, scope creep on projects, or infrastructure costs growing faster than usage.
- Margin compression during growth. Rapid scaling sometimes requires discounting or higher delivery costs. If gross margin drops 5 points while revenue doubles, you need to know whether that's temporary or structural.
- Not tracking margin by segment. An overall 55% gross margin might hide a 75% product and a 20% product. Blended numbers mask the real story — always break it down by product, service line, or customer type.
How CentSight Helps
CentSight calculates gross margin from your actual QuickBooks data and tracks it over time. It flags changes early: a 2% margin decline over two months might seem small, but at $10M revenue that's $200K in lost profit annually. CentSight catches these trends before they become crises.