Revenue is vanity. Profit is sanity. Gross margin is where you see the truth.
A $10M company with 80% gross margin is stronger than a $20M company with 30% margin. Gross margin reveals your unit economics and whether you can scale profitably.
The Formula
Gross Margin = (Revenue - Cost of Goods Sold) ÷ Revenue × 100
Or:
Gross Margin = (Revenue - COGS) ÷ Revenue %
Where COGS (Cost of Goods Sold) includes only direct costs to deliver the product:
- Materials/ingredients
- Manufacturing labor
- Hosting/infrastructure directly attributed to serving customers
- Payment processing fees
- Support/delivery labor
COGS does NOT include:
- Salaries for non-delivery roles (marketing, sales, engineering)
- Rent/utilities
- Administrative overhead
Step-by-Step Calculation
Step 1: Identify total revenue for period Use revenue recognized in the period (not invoiced revenue).
Step 2: List all COGS
- Raw materials cost
- Manufacturing/production labor
- Hosting costs per customer
- Payment processor fees
- Customer support (direct delivery)
- Shipping/delivery costs (if applicable)
Step 3: Sum COGS
Step 4: Calculate gross profit
Gross Profit = Revenue - COGS
Step 5: Divide gross profit by revenue
Gross Margin % = (Gross Profit ÷ Revenue) × 100
Example 1: SaaS Company
Q2 Income Statement:
- Revenue: $500,000
- COGS (costs to deliver):
- Cloud hosting ($50K for servers): $50,000
- Payment processing fees (2.9% + $0.30): $15,500
- Customer support team (30% allocation): $20,000
- Total COGS: $85,500
Calculation:
Gross Profit = $500,000 - $85,500 = $414,500
Gross Margin = $414,500 ÷ $500,000 × 100 = 82.9%
Interpretation: For every dollar of revenue, $0.83 is profit after direct costs.
Example 2: E-commerce
Monthly:
- Revenue: $100,000
- COGS:
- Product cost: $35,000
- Packaging/shipping: $8,000
- Payment processing: $2,900
- Warehouse labor: $5,000
- Total COGS: $50,900
Calculation:
Gross Profit = $100,000 - $50,900 = $49,100
Gross Margin = $49,100 ÷ $100,000 × 100 = 49.1%
Example 3: Manufacturing
Quarterly:
- Revenue: $2,000,000
- COGS:
- Raw materials: $600,000
- Manufacturing labor: $300,000
- Factory utilities: $80,000
- Equipment depreciation: $40,000
- Quality assurance labor: $50,000
- Total COGS: $1,070,000
Calculation:
Gross Margin = ($2,000,000 - $1,070,000) ÷ $2,000,000 × 100 = 46.5%
Industry Benchmarks
Healthy margins vary dramatically:
| Industry | Typical Gross Margin | |----------|---------------------| | SaaS | 70-90% | | Professional Services | 40-60% | | E-commerce | 30-50% | | Manufacturing | 30-50% | | Retail | 25-40% | | Hospitality | 60-80% |
High-margin businesses (SaaS, software) scale better than low-margin (retail, manufacturing).
Gross Margin vs. Net Margin
Don't confuse the two:
| Metric | Formula | What It Includes | |--------|---------|-----------------| | Gross Margin | (Rev - COGS) ÷ Rev | Direct product costs only | | Operating Margin | (Rev - COGS - OpEx) ÷ Rev | + Sales, marketing, overhead | | Net Margin | Net Income ÷ Rev | + Interest, taxes |
Example with all three:
- Revenue: $1,000,000
- COGS: $200,000
- Gross Margin = 80%
- Operating expenses (sales, marketing, salaries): $500,000
- Operating Margin = 30%
- Interest & taxes: $50,000
- Net Margin = 25%
Gross margin shows product economics. Operating margin shows business viability. Net margin shows profitability to shareholders.
What to Include in COGS (and What NOT to)
INCLUDE in COGS:
- Raw materials/inventory
- Direct labor (people making/delivering the product)
- Manufacturing overhead directly tied to production
- Hosting/infrastructure per customer
- Payment processing fees
- Shipping/delivery costs
- Packaging
- Quality assurance labor
DO NOT INCLUDE:
- Sales commissions (put in Operating Expenses)
- Marketing (Operating Expenses)
- Management salaries (Operating Expenses)
- Rent/utilities (Operating Expenses)
- Administrative staff (Operating Expenses)
- R&D/engineering (Operating Expenses)
- Depreciation of non-manufacturing assets
The rule: If you can't directly tie it to delivering the product to a customer, it's not COGS.
Gross Margin Trends
Track gross margin over time:
| Quarter | Revenue | COGS | Gross Margin | |---------|---------|------|--------------| | Q1 | $400K | $80K | 80% | | Q2 | $500K | $95K | 81% | | Q3 | $600K | $120K | 80% | | Q4 | $800K | $168K | 79% |
Declining margin (Q1: 80% → Q4: 79%) suggests:
- Scale inefficiencies
- Higher customer support costs
- Increased competition (discounting)
- Product quality changes
Investigate and fix before it gets worse.
Improving Gross Margin
1. Reduce COGS
- Negotiate better supplier rates
- Optimize production efficiency
- Reduce waste
- Automate labor-intensive processes
- Move from manufacturing to SaaS model (if applicable)
2. Increase prices
- Without changing COGS, higher revenue = higher margin
- Test price increases (usually only 5-10% reduce volume)
3. Mix shift
- Focus on high-margin products
- Sell more high-margin vs. low-margin SKUs
- Upsell/cross-sell to increase per-customer revenue
4. Scale benefits
- As revenue grows, fixed COGS components spread across more revenue = higher margin
Common Mistakes
Mistake 1: Including operating expenses in COGS Sales commissions, marketing, and admin should go in Operating Expenses, not COGS.
Mistake 2: Not updating COGS allocation If you add a new product line or manufacturing process, recalculate COGS for each product. One company-wide COGS number hides problems.
Mistake 3: Ignoring gross margin by customer Some customers might have negative gross margin (costs more to serve than revenue). Identify and fix or drop them.
Mistake 4: Confusing accrual vs. cash COGS COGS should be accrued (when product is delivered), not when paid.
Tools
Spreadsheet: Monthly gross margin tracking with variance analysis. Accounting software: QuickBooks, Xero, NetSuite track COGS automatically. Analytics: Tableau, Looker show gross margin trends by product/customer.
Related Articles
- What Is EBITDA — Removes depreciation and other items
- Net Profit Margin — Full profit picture
- Unit Economics — Cost per customer