Profitability ratios

Q: How is Capital Employed calculated in the context of Return on Capital Employed (ROCE)?

Capital Employed equals either Total Equity + Non-Current Liabilities or Total Assets - Current Liabilities .

BA3 – Fundamentals of Financial Accounting · CIMA (CGMA Professional Qualification) · 5 min read · Updated: 6 Nov 2026

Introduction to Profitability Ratios

Welcome to one of the most exciting parts of the BA3 Fundamentals of Financial Accounting syllabus! In Section D, we move beyond simply "doing" the accounts and start "interpreting" them. Imagine you are a doctor examining a patient; the financial statements are the test results, and profitability ratios are the tools you use to diagnose how healthy the business really is.

In this chapter, we will learn how to measure how efficiently a company turns its sales into profit and how well it uses its resources to generate a return for its owners. Don't worry if numbers usually feel a bit overwhelming—we will break every formula down into simple, logical steps.

What is Profitability?

It is important to distinguish between profit (the absolute dollar amount left over) and profitability (the relative success of the business). A company making \$1 million in profit might sound great, but if they had to spend \$100 million to get it, they aren't very "profitable." Profitability ratios help us compare businesses of different sizes by looking at percentages and proportions.

Quick Review: Remember the three levels of profit from your statement of profit or loss:
1. Gross Profit: Revenue minus Cost of Sales.
2. Operating Profit (PBIT): Gross Profit minus Operating Expenses.
3. Profit for the Year (Net Profit): What is left after finance costs (interest) and tax.

1. Gross Profit Margin

The Gross Profit Margin looks at the relationship between the money coming in from sales and the direct cost of producing those goods.

The Formula:

$ \text{Gross Profit Margin} = \frac{\text{Gross Profit}}{\text{Revenue}} \times 100 $

What does it tell us?

It shows us how much "raw" profit a company makes for every \$1 of sales. If the margin is 40%, the company keeps 40 cents of every dollar of revenue to cover its operating expenses, financing costs, and taxes.

Real-World Example:

Imagine a coffee shop. If a cup of coffee sells for \$5.00 and the beans, milk, and cup cost \$1.00, the Gross Profit is \$4.00. The Gross Profit Margin is 80%. If the cost of milk goes up, that margin will shrink!

Common Reasons for Change:

Changes in selling prices.
Changes in purchase costs of raw materials or merchandise.
Changes in the sales mix (selling more high-margin products vs low-margin products).
Inventory write-downs or theft.

Key Takeaway: The Gross Profit Margin focuses strictly on the trading activities of the business before any administrative, selling, or distribution overheads are considered.

2. Operating Profit Margin

The Operating Profit Margin measures how much profit remains after taking into account both the cost of sales and all day-to-day operating expenses (such as rent, administrative staff salaries, and marketing).

The Formula:

$ \text{Operating Profit Margin} = \frac{\text{Operating Profit}}{\text{Revenue}} \times 100 $

Note: Operating profit is also referred to as Profit Before Interest and Tax (PBIT).

What does it tell us?

It measures operating efficiency and overhead control. It tells us how effectively management runs the business operations independently of how the business is financed or taxed.

Quick Review: If the Gross Profit Margin remains steady but the Operating Profit Margin declines, the issue lies in rising operating expenses (overheads), not direct production costs.

3. Net Profit Margin

While the operating margin evaluates core operations, the Net Profit Margin measures the ultimate "bottom-line" percentage left for the business owners after all expenses, including finance costs (interest) and tax, have been deducted.

The Formula:

$ \text{Net Profit Margin} = \frac{\text{Profit for the Year}}{\text{Revenue}} \times 100 $

What does it tell us?

It reveals the final return per dollar of revenue. Comparing the Net Profit Margin to the Operating Profit Margin highlights the impact of financing structure (interest charges) and taxation on the business.

4. Return on Capital Employed (ROCE)

ROCE is widely regarded as the primary measure of overall profitability. It indicates how efficiently a business uses all long-term capital provided by lenders and owners to generate operating profits.

The Formula:

$ \text{ROCE} = \frac{\text{Operating Profit}}{\text{Capital Employed}} \times 100 $

How to calculate Capital Employed:
Capital Employed represents the long-term funds financing the business. You can calculate it in two equivalent ways:
1. Total Equity + Non-Current Liabilities (share capital, reserves, and long-term borrowings).
2. Total Assets - Current Liabilities.

Why use Operating Profit?

We use Operating Profit (PBIT) because it reflects earnings generated before paying finance costs to debt holders or dividends/taxes to equity holders. This allows a neutral comparison across companies with different debt levels.

5. Non-Current Asset Turnover

The Non-Current Asset Turnover ratio measures how efficiently an entity utilises its long-term fixed assets (property, plant, equipment, and intangibles) to generate sales.

The Formula:

$ \text{Non-Current Asset Turnover} = \frac{\text{Revenue}}{\text{Non-Current Assets}} $

(Note: This is expressed as "times" per period, rather than a percentage.)

What does it tell us?

It indicates how many dollars of sales are generated by every dollar invested in non-current assets. A higher turnover figure suggests more productive asset utilisation, whereas a low figure may signal under-utilised or idle equipment.

The Relationship to ROCE:

When asset turnover is calculated using total capital employed ($ \frac{\text{Revenue}}{\text{Capital Employed}} $), it links directly to profitability:
Operating Profit Margin $\times$ Asset Turnover = ROCE

A business can therefore boost its ROCE by:
1. Increasing the profit margin on every sale.
2. Generating a higher volume of sales from its asset base.

Common Mistakes to Avoid

Confusing profit measures: Gross margin uses Gross Profit; operating margin uses Operating Profit (PBIT); net margin uses Profit for the Year.
Forgetting to multiply by 100: Margins and ROCE are expressed as percentages, while asset turnover is stated as "times".
Using the wrong denominator for ROCE: Capital Employed is not just equity or total assets; it is Total Assets minus Current Liabilities (or Equity plus Non-Current Liabilities).
Confusing asset turnover denominators: Non-current asset turnover divides revenue by non-current assets, not total assets.

Summary Checklist

Before moving on to the practice questions, make sure you can:

1. Calculate and interpret Gross Profit Margin, Operating Profit Margin, and Net Profit Margin.
2. Identify specific reasons for changes in each margin.
3. Calculate Capital Employed using both equity/liabilities and asset approaches.
4. Calculate ROCE and explain why operating profit is used in the numerator.
5. Calculate Non-Current Asset Turnover and understand how asset turnover drives overall return on investment.

References

CGMA Certificate in Business Accounting Syllabus — AICPA & CIMA
Cert BA BA3 Study and Exam Guide — CIMA

Quick check

Can you answer these now?

Open each question to check the key ideas from this chapter.

What is the key difference between profit and profitability?

Profit is the absolute dollar amount of earnings remaining, whereas profitability is a relative measure showing how efficiently profits are generated in relation to sales or resources invested.

How is the Gross Profit Margin calculated and what does it measure?

$ \text{Gross Profit Margin} = \frac{\text{Gross Profit}}{\text{Revenue}} \times 100 $; it measures the raw profit earned directly from trading before deducting overhead expenses.

How is the Operating Profit Margin calculated and what does it reflect?

$ \text{Operating Profit Margin} = \frac{\text{Operating Profit}}{\text{Revenue}} \times 100 $; it reflects operating efficiency and control over day-to-day administrative and selling overheads.

What does the Net Profit Margin measure and how is it calculated?

$ \text{Net Profit Margin} = \frac{\text{Profit for the Year}}{\text{Revenue}} \times 100 $; it measures the final percentage of revenue that remains for the owners after deducting all expenses, interest, and tax.

How is Capital Employed calculated in the context of Return on Capital Employed (ROCE)?

Capital Employed equals either Total Equity + Non-Current Liabilities or Total Assets - Current Liabilities.

Why is Operating Profit (PBIT) used as the numerator when calculating ROCE?

Operating profit is used because it reflects earnings before paying returns to finance providers (interest to debt holders and dividends/tax to equity), ensuring a fair comparison across different debt levels.

How is Non-Current Asset Turnover calculated and what does it indicate?

$ \text{Non-Current Asset Turnover} = \frac{\text{Revenue}}{\text{Non-Current Assets}} $; it indicates how many dollars of sales are generated for each dollar invested in long-term assets.

How does Asset Turnover combine with Operating Profit Margin to determine ROCE?

$ \text{Operating Profit Margin} \times \text{Asset Turnover} = \text{ROCE} $.

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