If you had to point to two numbers that tell you the most about the financial health of a business, gross margin and net margin would be strong contenders. Yet in my experience working with founders and business owners across Australia, these two metrics are frequently misunderstood, conflated, or simply not tracked with the rigour they deserve.
Let me fix that.
What Is Gross Margin?
Gross margin is the profit remaining after deducting the direct costs of producing or delivering your product or service from your revenue.
Gross Margin = Revenue − Cost of Goods Sold (COGS)
Expressed as a percentage: Gross Margin % = (Revenue − COGS) ÷ Revenue × 100
The key question is: what counts as COGS? This varies by business type, but the general principle is that COGS includes only the costs that are directly and variably tied to each unit of output:
- For a product business: raw materials, direct labour, packaging, and freight
- For a restaurant: food and beverage costs, kitchen labour
- For a professional services firm: the direct labour cost of delivering the service (consultant time, contractor costs)
What does NOT belong in COGS: rent, utilities, management salaries, marketing, accounting fees — these are overhead costs, not direct costs.
Why Gross Margin Matters
Gross margin tells you how efficiently you are converting revenue into contribution after direct delivery costs. It is the foundation of your business model.
A high gross margin means you have significant room to absorb overhead, invest in growth, and generate profit. A low gross margin means your entire business is built on thin ice — every overhead dollar you add puts more pressure on an already tight model.
Industry benchmarks vary widely:
- Software (SaaS): 70–85%
- Professional services: 50–70%
- Retail: 40–60%
- Hospitality: 60–70% on food (though this falls significantly after labour is included)
- Manufacturing: 25–45%
If your gross margin is significantly below your industry benchmark, something is wrong: your pricing is too low, your direct costs are too high, or both.
What Is Net Margin?
Net margin is the profit remaining after ALL costs have been deducted — including overhead, depreciation, interest, and tax.
Net Profit = Revenue − COGS − Operating Expenses − Interest − Tax
Net Margin % = Net Profit ÷ Revenue × 100
Net margin is the "bottom line" measure — it tells you what percentage of every dollar of revenue actually translates into profit for the owner.
For most SMEs, a healthy net margin falls somewhere between 5% and 20%, depending on the industry. Professional services firms can achieve 20%+ net margins. Hospitality businesses are doing well to achieve 8–12%. Retail margins are typically tight at 3–8%.
Why Net Margin Matters
Net margin is the measure that ultimately determines whether the business is viable. A business with high gross margin but unsustainable overhead can still have a miserable net margin. Net margin forces you to look at the full picture, not just the revenue-minus-cost-of-delivery calculation.
The Gap Between Gross and Net: Your Overhead Structure
The difference between gross margin and net margin is, essentially, your overhead. This is where many businesses bleed money without realising it.
If your gross margin is 55% and your net margin is 8%, you are spending 47% of revenue on overhead. The question is: are those overhead costs proportionate, productive, and managed?
Overhead costs include:
- Occupancy — rent, outgoings, utilities
- People — salaries for non-direct labour (management, administration, sales, marketing)
- Technology — software subscriptions, IT infrastructure
- Finance costs — interest on loans, bank fees
- Professional services — accounting, legal, consulting
Each category deserves scrutiny. As businesses grow, overhead tends to expand quietly — a new software subscription here, a new hire there — and before long the overhead structure is consuming a disproportionate share of revenue.
Using Both Metrics Together
Gross margin and net margin used together give you a powerful diagnostic toolkit.
High gross margin, low net margin: Your business model is fundamentally sound (you are making money at the point of delivery) but your overhead structure is too heavy. Look hard at operating expenses.
Low gross margin, low net margin: You have a structural problem at the pricing or cost-of-delivery level. This is the harder problem to fix because it is embedded in the core business model.
High gross margin, high net margin: You are running an efficient, well-priced business. Protect this position as you scale — overhead creep is the most common way businesses degrade from this position.
Low gross margin, high net margin: Unusual, but can occur in very low-overhead businesses (some distribution or agency models). The risk here is that any increase in direct costs or overhead destroys the margin.
Practical Steps for Founders
- Calculate your gross margin for the last 12 months. Make sure you are only including true direct costs in COGS, not overhead.
- Calculate your net margin for the same period.
- Compare to industry benchmarks. Are you in line, above, or below?
- Identify the gap. If gross is high but net is low, your overhead is the problem. If gross is low, your pricing or delivery costs are the problem.
- Set targets. Decide what gross margin and net margin you want to achieve in the next 12 months, and build a plan to get there.
Understanding these two numbers, and the story they tell together, is one of the most important financial skills a founder can develop. It is not complicated — but it does require honesty and consistency to apply well.
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