IB Business Management HLTopic 3 — Finance and AccountsPaper 1 & 2Core skill~9 min read
Measuring Profitability
A big profit figure on its own tells you almost nothing. Is $72,000 good? It depends on how much revenue the firm made and how much money the owners put in. Profitability ratios turn a raw number into a percentage you can actually compare — against last year, against a rival, against the bank.
What you need to know
Ratio analysis takes numbers out of the final accounts and turns them into figures you can compare.
Gross profit margin = gross profit as a percentage of revenue. It looks at direct costs only.
Profit margin = profit before interest and tax as a percentage of revenue. It also includes overheads.
Return on capital employed (RoCE) = profit as a percentage of the money invested in the business.
For all three, higher is better and a rising trend matters more than a single year’s figure.
A ratio only means something when you compare it: with last year, with a competitor, or with a target.
Where the numbers come from
Every profitability ratio is built from two of the accounts you already know. You are not learning new data — you are learning new ways to divide it.
Account
What you take from it
Statement of profit or loss
Revenue, cost of sales, gross profit, profit before interest and tax
Statement of financial position
Equity, non-current liabilities (used to work out capital employed)
Once you have the figures, the job is always the same four steps: collect the data, calculate the ratio, compare it with something, then say what the business should do about it. Marks in Paper 2 are almost never for the arithmetic alone — they are for the last two steps.
If a question says “calculate and comment”, the calculation is usually one or two marks and the comment is the rest. Never stop at the percentage.
Gross profit margin
Gross profit is revenue minus cost of sales — the direct costs of making or buying the thing you sell. The gross profit margin turns that into a percentage, so it tells you how many cents of every sales dollar survive after paying for materials and stock.
Now take off the overheads too — rent, salaries, insurance, marketing. What is left is profit before interest and tax, and as a percentage of revenue that is the profit margin.
Profit margin
(profit before interest and tax ÷ revenue) × 100
Comparing the two margins is where the real analysis is. If the gross margin is healthy but the profit margin is thin, the problem is not the product — it is the running costs. If both are falling together, the problem is further up, in selling prices or supplier costs.
Both margins share the same denominator, so the only thing that changes is how many costs you have taken off the top.
WORKED EXAMPLE 1
Calculating both margins
Kabir Cycles had revenue of $480,000 last year. Cost of sales was $312,000 and expenses were $96,000. Calculate the gross profit margin and the profit margin. [4]
Step 1: work out the two profit figuresGross profit = 480,000 − 312,000 = $168,000Profit before interest and tax = 168,000 − 96,000 = $72,000Step 2: gross profit margin(168,000 ÷ 480,000) × 100 = 0.35 × 10035%Step 3: profit margin(72,000 ÷ 480,000) × 100 = 0.15 × 10015%35 cents of every sales dollar is left after stock costs, but only 15 cents survives the overheads.
Return on capital employed
The two margins ask “how much of my sales became profit?” RoCE asks a different and harder question: how hard is the money working? It compares profit with the total amount of long-term money tied up in the business.
Return on capital employed
(profit before interest and tax ÷ capital employed) × 100
Capital employed
non-current liabilities + equity
Think of it as an interest rate for the whole business. If a firm earns 17% on its capital and a savings account pays 4%, the owners are better off running the business. If the business only earns 3%, the money would do better in the bank — and investors will notice.
Capital employed is usually given to you in the stimulus material. Only add non-current liabilities and equity together yourself if the question does not hand you the figure.
Because RoCE is a percentage, it lets you compare a small branch with a large one fairly.
WORKED EXAMPLE 2
RoCE and a closure decision
Kabir Cycles has three branches. North has capital employed of $1.8m and profit of $0.27m. East has $2.4m and $0.42m. South has $2.1m and $0.29m. Calculate the RoCE of each branch and recommend which one should close. [5]
Step 1: apply the formula to each branchNorth = (0.27 ÷ 1.8) × 100 = 15.00%East = (0.42 ÷ 2.4) × 100 = 17.50%South = (0.29 ÷ 2.1) × 100 = 13.81%Step 2: pick the weakest and say whyClose SouthSouth earns the lowest return on the money invested in it, so that capital could work harder somewhere else. In an evaluation question, add that South may still be worth keeping if it protects market share or if closure costs are high.
Improving profitability
There are only two levers: raise revenue or cut costs. Everything else is a version of one of those. The skill in an exam is knowing which lever fits which ratio, and naming the risk.
Action
Which ratio it helps
The risk
Raise selling prices
Gross profit margin and profit margin
Customers may switch to cheaper rivals, so volume falls
Negotiate cheaper suppliers or buy in bulk
Gross profit margin
Quality may drop, or bulk stock needs storage
Cut overheads such as rent or staffing
Profit margin only
Morale and service quality can fall
Sell more premium products
Both margins
Needs a customer base willing to pay more
Sell off assets that are barely used
RoCE
Less capacity to grow later
How to answer a “comment on profitability” question
State the direction. Has the ratio risen or fallen, and by how many percentage points?
Compare the two margins. If gross is steady but profit margin fell, blame overheads.
Use the stimulus. Find the sentence in the case study that explains the change.
Judge it. Say whether this is a problem now, and what the firm should do first.
Exam tip
Write the formula down before you touch the calculator. It is often worth a mark on its own.
Give the answer as a percentage to two decimal places unless the question says otherwise.
Check your units. $0.39m means $390,000 — mixing millions and thousands is the most common way to lose easy marks.
Say “percentage points” when a margin moves from 12% to 15%, not “3%”.
RoCE differs a lot between industries, so only compare firms in the same sector.
A RoCE of around 20% or more is usually seen as a strong sign of financial health.
Common mix-up
Using net profit in the RoCE formula. RoCE uses profit before interest and tax, because interest is a reward to lenders whose money is part of capital employed.
Dividing by profit instead of revenue. Revenue is always the bottom of a margin calculation.
Forgetting to multiply by 100. An answer of 0.35 is not a margin, it is a decimal.
Saying “profit went up so profitability improved”. If revenue rose faster than profit, the margin actually fell.
Comparing a supermarket’s margin with a jeweller’s. Different business models, so the comparison is meaningless.
Treating capital employed as cash. It is long-term funding, not money sitting in the bank.
Up next: Measuring Liquidity — profitability tells you whether the business is winning, liquidity tells you whether it can survive until next month.
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