Operating income reveals a financial reality that revenue growth alone cannot explain: a business can sell more, attract new customers, and expand its operations while still struggling to make a profit. Higher sales may look impressive, but the real question is how much money remains after covering the costs of running the business.
Amazon’s International segment illustrates this challenge. In 2023, it generated $131.2 billion in sales but recorded a $2.656 billion operating loss. By 2025, the segment had returned to profitability. Costco presents a different picture, reporting more than $303 billion in fiscal 2026 revenue while maintaining an operating margin below 4%.
These examples reveal why revenue alone is an incomplete measure of business success. Understanding operating income, operating margins, and the costs behind sales growth helps entrepreneurs and investors distinguish genuine profitability from impressive-looking revenue figures.
What Is Operating Income?
Operating income, also known as operating profit, is the profit a business earns after deducting the costs of its core operations from revenue. These costs include production, salaries, marketing, administration, and depreciation.
Unlike net income, it generally excludes interest expenses, income taxes, and non-operating gains or losses. It helps business owners understand whether everyday operations are profitable.
Operating Income Formula and Example
The operating income formula is:
Operating Income = Revenue − Cost of Goods Sold − Other Operating Expenses
For example, consider a business with the following annual results:
| Financial item | Amount |
|---|---|
| Revenue | $500,000 |
| Cost of goods sold | $300,000 |
| Other operating expenses | $140,000 |
| Operating income | $60,000 |
Its operating margin is:
($60,000 ÷ $500,000) × 100 = 12%
This means the company earns $12 in operating profit for every $100 in revenue.
However, positive operating profit does not necessarily mean the business has positive cash flow or net income.
The Amazon Case: $131 Billion in Sales, but an Operating Loss
Amazon’s 2025 annual Form 10-K provides historical results for its International segment. Figures in the table below are in billions of U.S. dollars.
| Measure | 2023 | 2024 | 2025 |
|---|---|---|---|
| Segment sales | $131.200 | $142.906 | $161.894 |
| Segment operating expenses | $133.856 | $139.114 | $157.144 |
| Segment operating income (loss) | −$2.656 | $3.792 | $4.750 |
| Calculated operating margin | −2.02% | 2.65% | 2.93% |
In 2023, each $100 of international-segment sales was associated with approximately $102.02 in reported operating expenses. Large-scale revenue did not prevent a loss. Two years later, revenue was higher, and the segment reported positive operating profit.
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Amazon’s Latest Results Show Why Revenue Mix Matters
Amazon’s third-quarter 2026 earnings report recorded $201.944 billion in sales and $28.076 billion in operating income. However, profitability varied significantly across its business segments.
- North America: $112.852 billion in sales, with a 7.73% operating margin.
- International: $43.108 billion in sales, with a 3.67% operating margin.
- Amazon Web Services (AWS): $45.984 billion in sales, with a 38.65% operating margin.
AWS generated approximately 22.8% of Amazon’s total revenue but 63.3% of its operating income during the quarter.
This comparison demonstrates why revenue alone cannot measure profitability. Different operating costs, business models, and revenue sources can produce significantly different margins. AWS also requires substantial infrastructure investment, so its operating margin should not be confused with free cash flow.
Costco: What $303 Billion in Revenue Actually Produces
Costco offers a contrasting high-volume business model. Its 2026 Form 10-K reports results for the 52 weeks ended August 30, 2026.
| Financial item | Fiscal 2026 |
|---|---|
| Merchandise sales | $297.247bn |
| Membership fees | $5.907bn |
| Total revenue | $303.154bn |
| Merchandise costs | $264.279bn |
| Selling, general and administrative expenses | $27.190bn |
| Operating income | $11.685bn |
| Calculated operating margin | 3.85% |
The calculation is straightforward: $303.154 billion minus $264.279 billion minus $27.190 billion equals $11.685 billion.
Yet the revenue breakdown is more revealing than the headline margin. Subtracting merchandise costs from merchandise sales leaves $32.968 billion, an 11.09% merchandise gross margin as reported in the filing. Costco also recorded $5.907 billion in membership-fee revenue. Both sources contribute to the revenue available to cover company-wide operating expenses.
Membership fees are not pure profit: associated costs are not separately removed from that revenue line. Operating income increased from $10.383 billion in 2025, while margin improved from approximately 3.77% to 3.85%.
A thin margin is not necessarily a weak business; consider stability, cash generation, inventory economics, and capital needs. Amazon and Costco also report different periods and models, so this is not a ranking of management quality.
What the Two Companies Reveal About Growth
Three conclusions emerge from reading the filings together.
First, scale and profitability are separate dimensions. Amazon’s International operation once reported a multibillion-dollar loss despite enormous sales. Costco earns significant absolute operating income on a relatively narrow percentage margin.
Second, revenue composition changes the outcome. Amazon’s AWS segment delivers a different operating margin from its other reported segments. Costco combines merchandise sales with a membership revenue stream. The headline sales number is incomplete.
Third, the trend matters more than one impressive figure. Look for improving operating profit relative to sales over several comparable periods. Investigate whether it reflects pricing, mix, expenses, or unusual charges. Understand what drives the change.
How Rising Sales Can Reduce Operating Income
Higher revenue does not always translate into higher profits. When production, staffing, marketing, or expansion costs increase faster than sales, a company’s operating income can decline.
Consider this hypothetical business example:
| Financial measure | Year 1 | Year 2 |
|---|---|---|
| Revenue | $1,000,000 | $1,200,000 |
| Cost of goods sold | $600,000 | $780,000 |
| Other operating expenses | $250,000 | $340,000 |
| Operating income | $150,000 | $80,000 |
| Operating margin | 15% | 6.67% |
Despite a 20% increase in revenue, operating profit fell by approximately 46.7%. The company spent an additional $270,000 to generate just $200,000 in extra sales.
This situation can arise from aggressive discounts, rising labor costs, expensive expansion, or a shift toward lower-margin products.
Evaluate Profit Before Expanding
Suppose a company accepts a $100,000 contract requiring $75,000 in direct costs. That leaves a $25,000 contribution before additional operating expenses.
If the contract also requires $30,000 in new operating costs, it would reduce expected operating profit by $5,000.
Before pursuing growth, businesses should evaluate additional costs, available capacity, customer payment risks, and expected returns.
Sustainable growth depends on how much profit additional sales generate, not simply how much revenue increases.
Operating Income vs. Net Income, EBITDA and Cash Flow
These measures answer different financial questions, even when the numbers appear side by side.
| Measure | Useful question | What it does not establish |
|---|---|---|
| Operating income | Are core operations profitable? | Final earnings or cash available |
| Net income | What remains after non-operating items and taxes? | Cash generated in the period |
| EBITDA | What are earnings before interest, taxes, depreciation and amortization? | Capital expenditure needs |
| Operating cash flow | How much cash did operations generate? | Cash remaining after investment |
Amazon illustrates the difference. In Q3 2026, operating income increased from $17.422 billion a year earlier to $28.076 billion, while net income declined from $21.187 billion to $20.685 billion. Amazon explained that Q3 2025 benefited from $9.5 billion in pretax gains related to Anthropic investments, recorded outside operating income. An investor looking only at net income might miss the improvement in operating performance.
Cash requires another check. For the 12 months ended September 30, 2026, Amazon reported $168.3 billion in operating cash flow but negative $42.4 billion in free cash flow, using its disclosed definition. The company associated the decline primarily with higher property-and-equipment spending linked to artificial-intelligence investments. Strong reported operations do not eliminate the need to examine capital expenditure, working capital, or liquidity.
What Is Net Operating Income?
Net operating income, or NOI, commonly describes a property-level measure in real estate, not necessarily the operating-income line of a company’s financial statements. Fannie Mae’s multifamily guide defines property NOI as effective gross income minus operating expenses.
For example, a rental building with $120,000 in effective annual income and $45,000 in eligible property operating expenses produces $75,000 in NOI. Debt service, income taxes, and capital expenditures are not automatically deducted from that figure. Specific underwriting rules may require other adjustments.
This distinction prevents an investor from comparing a property NOI figure directly with corporate operating profit as though the two were calculated identically.
A Practical Operating Profit Review for Owners
Before celebrating a sales target or approving expansion, work through five checks:
- Reconcile the statement: Confirm that reported revenue, cost of sales, and other operating expenses produce the stated operating income. Check where depreciation is recorded to avoid double counting.
- Measure the margin trend: Compare the same quarter across years or equivalent annual periods, not an isolated month with a seasonal peak.
- Identify the profitable mix: Examine products, customers, channels, and regions. A growing low-margin line can dilute the business’s overall result.
- Model the next sale: Estimate incremental revenue, variable costs, capacity requirements, and any new fixed expenses. Test what happens if volume or pricing misses expectations.
- Verify the cash picture: Review receivables, inventory, operating cash flow, debt obligations, and capital spending before assuming accounting profit can fund growth.
Public filings help investors; private-business owners may need detailed management accounts reconciled to the ledger.
Conclusion
Operating income reveals whether rising sales translate into meaningful business profits. Amazon’s historical operating losses demonstrate that substantial revenue does not guarantee profitability, while Costco shows how a high-volume business can generate billions in earnings despite relatively modest operating margins. These examples highlight why revenue growth alone cannot measure financial success.
For entrepreneurs and investors, tracking operating income alongside operating margins, net income, and cash flow provides a clearer picture of financial performance. Before expanding, businesses should evaluate rising expenses, profit margins, and the costs of generating additional sales. Sustainable growth depends not just on selling more, but on retaining enough profit to support long-term operations.
FAQs AboutOperating Income
1. Can Operating Income Be Higher Than Net Income?
Yes. Operating income can exceed net income when interest expenses, taxes, and other non-operating losses reduce a company’s final earnings.
2. Can Operating Income Be Negative?
Yes. Negative operating income means a company’s operating expenses exceed its operating revenue, resulting in an operating loss.
3. Does Operating Income Include Depreciation?
Yes. Operating income generally includes depreciation and amortization expenses when they relate to business operations, unlike EBITDA, which excludes them.
Source: Cosmo Politian
