What Are Operating Expenses (OpEx)?
Operating expenses are the ongoing, day-to-day costs a company pays to keep running, such as rent, salaries, marketing, and utilities. They cover everything needed to operate the business except the direct cost of making the product itself. Companies watch them closely because cutting waste here flows straight to profit.
What actually counts as an operating expense?
Every business has two very different kinds of cost. There is the cost of literally making the thing it sells, and then there is the cost of keeping the lights on so it can sell anything at all. Operating expenses are that second bucket: the steady, recurring price of simply being open for business.
These are the costs that show up whether you sell one unit or a million: office rent, staff salaries, marketing campaigns, software subscriptions, insurance, and utility bills. On the income statement they sit just below the cost of goods sold, and subtracting them from gross profit is what reveals whether the core business actually makes money.
The Analogy
The cost of opening the doors
Think of a coffee shop. The beans, milk, and cups that go into each latte are the direct cost of the product. The rent, the barista's wages, the music subscription, and the glowing "We're Open" sign are something else: they are what it costs to simply unlock the door each morning, whether one customer shows up or a hundred. Those door-opening costs are operating expenses, and they have to be paid even on the slowest day.
How are operating expenses different from cost of goods sold?
It is a distinction worth getting right, because the two behave very differently. COGS rises and falls directly with how much you produce: make more lattes, buy more beans. Operating expenses are mostly fixed or slow to move: the rent is the same whether the shop is packed or empty. Many of them get grouped under a label called overhead, and a large chunk usually falls under "SG&A," short for selling, general, and administrative expenses.
| Cost type | What it covers | Examples |
|---|---|---|
| Cost of goods sold | Making the product | Coffee beans, milk, cups |
| Operating expenses | Running the business | Rent, salaries, marketing |
Research and development, the money a company spends inventing future products, is also an operating expense, even though it may not pay off for years. Both buckets are real costs, but operating expenses are usually the ones management can steer most directly month to month.
Why do investors watch operating expenses so closely?
Because they are the costs a management team can most directly control. A company cannot easily change the price of raw materials, but it can decide how many people to hire, how much to spend on advertising, and how lavish its offices are. When a business wants to lift profit without selling more, operating expenses are the first place it looks.
Why It Matters
Every dollar saved here lands on the bottom line
Operating expenses sit between gross profit and operating profit, so trimming them flows almost directly into earnings. That is why "cost-cutting" and "restructuring" usually translate to layoffs and reduced spending: payroll and marketing are among the largest operating expenses most companies carry. The flip side is that cutting too deep can starve the very activities, like research or sales, that fuel future growth.
What happens when a company slashes its operating expenses?
Sometimes an entire company reorganizes itself around this single line. When growth slows, leadership often turns to operating expenses to defend profit, and the results can be dramatic and very public.
Real-World Example
Meta's "Year of Efficiency"
In early 2023, Meta chief executive Mark Zuckerberg declared a "Year of Efficiency" and moved to cut the company's operating expenses sharply, including reducing headcount by well over 20,000 jobs across late 2022 and 2023.¹ The aim was to shrink running costs that had ballooned during a hiring spree. With lower operating expenses, far more of Meta's revenue flowed through to profit, and its profitability rebounded strongly over the following year.² It was a textbook demonstration of how powerful the operating expense line can be.
Can operating expenses be manipulated?
Because shrinking this line makes profit jump, it has long been a tempting target for companies that would rather look healthy than be healthy. The classic trick is to pretend an everyday operating cost is something else entirely.
Red Flags & Pitfalls
The classic trick: hiding expenses as "investments"
The most infamous case was WorldCom, which in 2002 was found to have recorded billions of dollars of ordinary operating costs as long-term capital investments instead.³ That single move made its operating expenses look far smaller and its profit far larger than reality, until the fraud unraveled into one of the biggest bankruptcies in US history. You do not need to be an accountant to stay alert: when a company's operating expenses fall suspiciously fast, it is always worth asking where those costs really went.
The TL;DR for Operating Expenses (OpEx)
At a Glance
Key Takeaways
- Operating expenses are the recurring costs of running a business, like rent, salaries, marketing, and R&D.
- They are separate from cost of goods sold, which is the direct cost of making the product itself.
- They sit between gross profit and operating profit, so controlling them directly shapes earnings.
- Cutting them lifts short-term profit, but cutting too deep, or hiding them, is a real warning sign.