Operating Margin

Definition

Operating margin is the percentage of revenue that remains after you subtract all operating expenses — cost of goods sold, salaries, rent, software, marketing, and everything else it takes to run the business. It excludes interest payments and taxes, which makes it a clean measure of how well your core operations perform.

It sits between gross margin (which only subtracts direct costs) and net profit margin (which includes everything). Operating margin is the sweet spot for understanding operational efficiency.

Why It Matters

Gross margin tells you if your pricing works. Operating margin tells you if your business works. You can have a great gross margin but a terrible operating margin if your overhead is bloated — too many tools, too much office space, too many people for the revenue you're generating.

It's also the best metric for comparing yourself to peers in your industry. A marketing agency with a 15% operating margin is doing well. A SaaS company with 15% is underperforming. Knowing the benchmark for your industry lets you set realistic targets.

Example: A design studio does $1.2M in revenue. COGS (freelancers, stock assets) is $360K, giving a 70% gross margin. Operating expenses (salaries, rent, software, insurance) are $660K. Operating profit is $180K, which means a 15% operating margin. For every dollar billed, fifteen cents is actual operating profit.

How to Calculate It

Operating Margin = (Revenue - COGS - Operating Expenses) / Revenue x 100

Or equivalently: Operating Income / Revenue x 100

How CentSight Helps

CentSight calculates your operating margin automatically by categorizing your expenses into COGS and operating costs. You can track it month-over-month and see exactly which expense categories are eating into your margin. Ask “Why did our operating margin drop last month?” and CentSight will point to the specific line items that changed.