Blog · Finance metrics and formulas · Finance and FP&A teams
Profitability ratios measure earnings, while efficiency ratios measure the assets used to support sales. This business-unit example connects operating margin and asset turnover to explain differences in operating return.
Profitability and efficiency ratios explain two different parts of business performance: earnings retained from sales and assets used to support those sales. Operating margin measures the first; asset turnover measures the second. Their product is operating return on average assets, so a unit with a higher margin can still earn a lower return.
The CFA Institute's financial analysis reading distinguishes activity measures, including total asset turnover, from profitability measures, including operating margin and operating return on assets.
| Comparison | Profitability | Efficiency |
|---|---|---|
| Main question here | How much operating profit remains from sales? | How much sales activity does the asset base support? |
| Measure used | Operating margin | Total asset turnover |
| Numerator | Operating profit | Net revenue |
| Denominator | Net revenue | Average total assets |
| Useful follow-up | Price, product mix, purchase cost, operating expense | Inventory, receivables, equipment use, idle capacity |
| What it misses alone | Capital tied up to earn the margin | Whether the sales produce a profit |
Profitability also includes return measures that already combine earnings and assets. This comparison separates margin from turnover to explain that combined result. The financial ratios guide covers the broader families; return on assets covers the return measure in detail.
Take a hypothetical US industrial supplies company with West and East operating units. Both report the calendar year ending December 31, 2025. The company uses the same revenue recognition, inventory costing, depreciation and corporate-cost allocation policies for both.
Export net revenue, cost of goods sold and operating expenses from the income statement by unit. Export total assets at the start and end of the year from the balance sheet by the same unit identifiers. Operating expenses here include depreciation and allocated corporate operating costs, with interest and income taxes excluded.
The SEC's financial statement guide defines operating margin using income from operations divided by net revenue, before interest and income taxes. That is the earnings definition used throughout this example.
| Input (USD) | West | East | Company |
|---|---|---|---|
| Net revenue | 4,000,000 | 2,000,000 | 6,000,000 |
| Cost of goods sold | 2,800,000 | 1,200,000 | 4,000,000 |
| Operating expenses | 800,000 | 500,000 | 1,300,000 |
| Opening total assets | 1,800,000 | 1,900,000 | 3,700,000 |
| Closing total assets | 2,200,000 | 2,100,000 | 4,300,000 |
These units have no intercompany sales or duplicated shared assets. In a real consolidation, remove internal transactions and assign shared assets once before comparing unit totals with the company.
Operating profit = Net revenue − Cost of goods sold − Operating expenses
Operating margin = Operating profit / Net revenue
Asset turnover = Net revenue / Average total assets
Operating return on average assets = Operating profit / Average total assets
Average assets are opening plus closing assets, divided by two. Percentages below are rounded to two decimals and turnover to two decimals; calculations retain the unrounded values.
| Calculation | West | East | Company |
|---|---|---|---|
| Operating profit (USD) | 4,000,000 − 2,800,000 − 800,000 = 400,000 | 2,000,000 − 1,200,000 − 500,000 = 300,000 | 6,000,000 − 4,000,000 − 1,300,000 = 700,000 |
| Average assets (USD) | (1,800,000 + 2,200,000) / 2 = 2,000,000 | (1,900,000 + 2,100,000) / 2 = 2,000,000 | (3,700,000 + 4,300,000) / 2 = 4,000,000 |
| Operating margin | 400,000 / 4,000,000 = 10.00% | 300,000 / 2,000,000 = 15.00% | 700,000 / 6,000,000 = 11.67% |
| Asset turnover | 4,000,000 / 2,000,000 = 2.00 times | 2,000,000 / 2,000,000 = 1.00 times | 6,000,000 / 4,000,000 = 1.50 times |
| Operating return | 400,000 / 2,000,000 = 20.00% | 300,000 / 2,000,000 = 15.00% | 700,000 / 4,000,000 = 17.50% |
East has the better operating margin. West earns the better operating return because it generates more revenue from the same average asset balance. Neither statement requires claiming that one unit is managed better; product economics and capacity requirements may differ.
Multiply operating margin by asset turnover:
(Operating profit / Revenue) × (Revenue / Average assets) = Operating profit / Average assets
Revenue cancels. West's 10.00% × 2.00 equals 20.00%; East's 15.00% × 1.00 equals 15.00%. At company level, use the unrounded 700,000 / 6,000,000 margin multiplied by 1.50 to recover 17.50%.
Do not average the displayed unit margins to obtain company margin. Divide summed operating profit by summed revenue; the weighted-ratio guide explains why the denominator determines the weighting.
Suppose East can support unchanged revenue and operating profit with average assets of $1,500,000, rather than $2,000,000. This is an illustrative operating scenario, with all other inputs held constant.
| East measure | Revised calculation | Result |
|---|---|---|
| Operating margin | 300,000 / 2,000,000 | 15.00% |
| Asset turnover | 2,000,000 / 1,500,000 | 1.33 times |
| Operating return | 300,000 / 1,500,000 | 20.00% |
Use unrounded turnover for the identity. The return improves with no margin improvement. Before treating that reduction as achievable, operations must confirm that lower assets will preserve delivery performance, credit availability and maintenance capacity.
Finance owns the definitions and reconciliation. Unit managers own the operating actions. Use the efficiency ratios overview to investigate individual asset balances, and compare liquidity and efficiency ratios when the concern is payment capacity.
Bring your unit income statement and asset-balance files to Covirage, which maps the columns. Its tools compute and check margins, turnover and returns; the external AI model explains the differences with every figure traced to its rows. Create a free Covirage account and bring a sample of your own data.
See financial planning and reporting for the wider finance workflow.
Asset turnover is an efficiency ratio because it compares revenue with average assets, without measuring earnings. Pairing it with a consistent profit margin shows how asset use and profitability combine to produce a return on assets.
Yes, if sales generated per dollar of assets increase enough to offset the lower margin. Check the same earnings definition and asset boundary in both periods before attributing a better return to stronger operating performance.
Start with the decision the manager controls. Pricing and direct costs affect margin, while inventory, receivables and equipment use affect turnover. Read the combined return too, so improving one measure does not hide deterioration in another.