Operating Expense

Operating Expense Definition

An operating expense (OPEX) is any cost your business incurs through its normal day-to-day operations. This includes rent, utilities, payroll, office supplies, insurance, and marketing — basically everything it takes to keep the lights on and the business running. Operating expenses do not include the cost of goods sold or capital expenditures.

Operating Expense in Practice — Example

A digital marketing agency has monthly operating expenses of $28,000: $8,000 for office rent, $12,000 for employee salaries, $3,000 for software subscriptions, $2,000 for utilities and internet, and $3,000 for marketing. These costs exist whether the agency signs new clients or not. The owner tracks these closely to know exactly how much revenue she needs each month to break even.

Why Operating Expense Matters for Your Business

Understanding your operating expenses is essential for profitability. These are the costs you must cover before you see a dollar of profit. If your operating expenses grow faster than your revenue, your margins shrink — even if sales look healthy on paper.

Tracking operating expenses also helps you find savings. Many small businesses discover they're paying for unused software subscriptions, overpaying for insurance, or spending too much on office space. Regular reviews of your OPEX can free up cash for growth.

How Operating Expense Works

Operating expenses are reported on your income statement and subtracted from gross profit to calculate operating income. The formula:

Operating Income = Gross Profit − Operating Expenses

Operating Expense vs Capital Expense

Operating expenses are recurring costs for running your business day-to-day. Capital expenses (CAPEX) are one-time purchases of long-term assets like equipment, vehicles, or property. OPEX is fully deductible in the year it's incurred, while CAPEX is depreciated over several years.

FAQ

Q: Are operating expenses tax-deductible?

A: Yes. Most operating expenses are deductible in the tax year they're incurred, reducing your taxable income.

Q: How do I reduce operating expenses without hurting the business?

A: Start by auditing subscriptions and vendor contracts. Negotiate better rates, eliminate unused tools, and consider remote work to reduce office costs.

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