Operating expenses are the day-to-day costs of running a business. They include everything a company must spend money on to keep its operations moving, such as salaries, rent, utilities, marketing, and office supplies. In short, operating expenses are what it takes to keep the lights on and the doors open.
Understanding operating expenses is critical because they directly impact profitability. The more efficiently a business manages these costs, the more money it has left over to invest in growth or return to shareholders.
Types of Operating Expenses
Operating expenses generally fall into a few major categories:
- Selling, general, and administrative expenses (SG&A): This includes salaries for office staff, rent, insurance, utilities, and office supplies.
- Marketing and advertising: Campaigns, digital ads, and promotional activities that help generate sales.
- Research and development: Costs related to creating new products or improving existing ones.
- Depreciation: The gradual reduction in value of equipment, buildings, or vehicles used in the business.
While these are the most common, every business has its own mix of operating expenses depending on its industry.
Operating Expenses vs Cost of Goods Sold
A common point of confusion is the difference between operating expenses and the cost of goods sold (COGS). COGS refers to the direct costs of producing a product or service, such as raw materials and factory labor. Operating expenses, on the other hand, are the indirect costs of running the business, like paying for office space or hiring an accountant.
Both matter, but they serve different purposes. COGS is subtracted from revenue to calculate gross profit. Then, operating expenses are deducted to calculate operating income.
Why Operating Expenses Matter
Operating expenses give investors and financial advisors insight into how efficiently a business is being managed. High operating expenses can drag down profits even if revenue is strong. On the other hand, cutting expenses too aggressively can hurt growth if it means reducing marketing or talent.
For entrepreneurs and small business owners, keeping track of operating expenses is just as important as it is for large corporations. Using budgeting apps or accounting software can help identify areas where costs can be reduced without hurting the overall health of the business.
A real example: where Walmart’s money goes.
Walmart’s latest twelve months of results show about $736 billion in revenue. Its gross margin is about 25%, meaning roughly $184 billion remains after the cost of the goods it sells. Its operating margin is about 4.4%. The gap between those two figures, roughly 21% of revenue or more than $150 billion a year, is operating expenses: wages, store leases, trucks and logistics, utilities, and corporate overhead.
That gap is why investors read the operating-expense line so carefully. A retailer cannot change what a pallet of goods costs very much, but how efficiently it moves that pallet through 10,000 stores is entirely a management question.
Operating leverage: why investors watch OpEx closely.
When revenue grows faster than operating expenses, each extra dollar of sales carries a bigger share to profit. That is operating leverage, and it is one of the main reasons investors prefer businesses with disciplined cost control. The flip side is just as real: when sales stall but salaries and leases do not shrink, margins compress fast.
For an investor, the practical habit is simple. Track a company’s operating margin, which is operating income divided by revenue, over several years. A steady or rising operating margin usually means management is keeping costs in line as the business grows. A falling one deserves a closer look before you buy. See also Profit Margin for how operating margin fits with gross and net margins.
Learning from Operating Expenses
Studying how businesses manage operating expenses can also help individuals learn more about money in their personal lives. Just as companies need to budget for salaries, rent, and utilities, households must budget for groceries, housing, and transportation.
Many popular books on money, like Your Money or Your Life by Vicki Robin, highlight the importance of identifying where your money goes and aligning expenses with your values. The same principle applies to businesses: money spent should support the long-term goals of the organization.
Final Thoughts
Operating expenses are more than just numbers on a financial statement. They represent the choices a business makes every day about how to allocate resources. For investors, entrepreneurs, and anyone trying to strengthen their financial knowledge, understanding operating expenses provides valuable lessons about efficiency, decision-making, and long-term success.
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