IB DP Business Management Unit 3: Finance and Accounts – Revision Notes

Unit 3 is tied for the largest unit in the full syllabus by teaching hours – 30 hours at SL (tied with Unit 4) and 45 hours at HL (tied with Unit 5) – and the one students most often find calculation-heavy. These notes work through each of the nine sub-topics with the calculation logic and common errors that matter for revision, rather than repeating the sub-topic list itself. Pair this with the subject overview for the course’s four interdisciplinary concepts, and the assessment revision notes for how Paper 2’s quantitative stimulus material is structured.

3.1 Introduction to finance and 3.2 Sources of finance

Every business needs finance for two broad reasons: to start up, and to expand or cover short-term cash needs once running. Sources split into internal (personal funds for sole traders, retained profit, sale of assets) and external (share capital, loan capital, overdrafts, trade credit, crowdfunding, leasing, microfinance providers, business angels). Revise this sub-topic by being able to match a described business situation to the most appropriate source – a start-up with no trading history cannot realistically use retained profit, and a business needing funds for one week of stock cannot sensibly use a long-term loan.

3.3 Costs and revenues

Distinguish fixed costs (do not vary with output, e.g. rent) from variable costs (vary directly with output, e.g. raw materials), and direct costs (attributable to one product) from indirect costs (shared across the business, e.g. head-office overheads). Revenue is calculated as price multiplied by quantity sold. A frequent exam error is treating a cost as fixed when the scenario describes it scaling with output, or vice versa – always check the described behaviour of the cost against the scenario, not just its category label.

3.4 Final accounts

The profit and loss account (showing profit or loss over a period) and the balance sheet (showing assets, liabilities and equity at a point in time) are the two final accounts the guide names. Know the basic structure of each: the profit and loss account moves from sales revenue down through cost of goods sold to gross profit, then subtracts expenses to reach net profit; the balance sheet balances non-current and current assets against current and non-current liabilities and equity, following the accounting equation (assets = liabilities + equity).

This sub-topic also requires the different types of intangible asset – assets with no physical form but real value, such as patents, trademarks, copyrights and goodwill – and, at HL only, depreciation using the straight line method (an equal amount written off the asset’s value each year: (cost − residual value) ÷ useful life) and the units of production method (depreciation charged in proportion to actual use, so a machine used heavily in one year is depreciated more that year than in a quiet year), along with the appropriateness of each method for a given asset.

Straight line depreciation example:
A machine costs $50,000, has a residual value of $5,000, and a useful life of 9 years.
Annual depreciation = (50,000 - 5,000) / 9 = $5,000 per year

3.5 Profitability and liquidity ratio analysis

Profitability ratios (gross profit margin, profit margin, return on capital employed) measure how efficiently a business converts revenue into profit. Liquidity ratios (current ratio, acid-test ratio) measure whether a business can meet its short-term obligations. A business can be highly profitable on paper and still fail from poor liquidity – revision should treat these as two distinct questions (“is it making money?” vs “can it pay its bills right now?”), not interchangeable measures of financial health.

Worked example: a business has revenue of $200,000, cost of sales of $120,000, other
expenses of $50,000, and capital employed of $150,000.

Gross profit          = 200,000 - 120,000 = $80,000
Gross profit margin   = (80,000 / 200,000) x 100 = 40%
Net profit            = 80,000 - 50,000 = $30,000
Profit margin         = (30,000 / 200,000) x 100 = 15%
ROCE                  = (30,000 / 150,000) x 100 = 20%

3.6 Efficiency ratio analysis (HL only)

Four ratios: stock turnover (how many times stock is sold and replaced in a period – low turnover can mean overstocking or slow-moving goods), debtor days (how long, on average, credit customers take to pay), creditor days (how long, on average, a business takes to pay its own suppliers) and the gearing ratio, which measures the proportion of a business’s capital employed that comes from long-term debt versus equity. A highly geared business (high proportion of debt) faces greater risk from interest payments but may achieve higher returns to equity holders when things go well. For each ratio, HL students should be able to suggest strategies to improve it – for example, tighter credit control to reduce debtor days – not just calculate it.

This sub-topic also requires distinguishing insolvency (a business cannot pay its debts as they fall due, a cash flow problem) from bankruptcy (the formal legal process that can follow insolvency for an individual or, for a company, liquidation) – a profitable business can still become insolvent if efficiency ratios such as debtor days are poorly managed.

3.7 Cash flow

Distinguish cash flow from profit: a profitable business can still run out of cash if customers pay late or if it has tied up cash in stock or fixed assets. Cash flow forecasts project cash inflows and outflows over future periods to identify potential shortfalls before they happen. Revision should include being able to read a simple cash flow forecast and identify the closing balance for a given period, plus explaining at least one method of improving cash flow (e.g. factoring, negotiating longer payment terms with suppliers, offering early-payment discounts to customers).

3.8 Investment appraisal

Two methods at both SL and HL: payback period (how long until the initial investment is recovered) and average rate of return (ARR, the average annual profit as a percentage of the initial investment). At HL only, a third method is added: net present value (NPV, which discounts future cash flows to account for the time value of money). Each has a different weakness worth knowing: payback ignores profitability after the payback point, ARR ignores the timing of returns, and NPV (HL only) depends on a chosen discount rate that itself involves judgement. A strong exam answer evaluates an investment decision using more than one method rather than relying on a single calculated figure.

Worked example: a project costs $40,000 and returns $16,000 cash flow in each of the
next 3 years, then $8,000 in year 4.

Payback period = 40,000 / 16,000 = 2.5 years (assuming even cash flow within the year)
Total profit over 4 years = (16,000 x 3 + 8,000) - 40,000 = $16,000
Average annual profit = 16,000 / 4 = $4,000
ARR = (4,000 / 40,000) x 100 = 10%

3.9 Budgets (HL only)

Budgets are financial plans setting targets for revenue and expenditure over a future period. HL students should be able to discuss variance analysis – comparing actual results against budgeted figures and explaining whether a variance is favourable or adverse, and what might have caused it – rather than only defining what a budget is.

Why this unit is calculation-heavy in practice

Paper 2 is built around unseen quantitative stimulus material, which makes Unit 3’s numerical tools worth practising under timed conditions specifically. A consistent, efficient habit across every calculation in this unit is writing out the formula before substituting numbers, and stating the answer with the correct unit (percentage, days, currency) – markschemes typically award method marks for correct formula and substitution even where a final numerical answer is wrong, so showing full working protects marks that a bare final answer would lose if a small arithmetic slip occurs.

Self-test

1. Give one internal and one external source of finance appropriate for a business needing funds to expand into a new market.
2. What is the difference between a fixed cost and a variable cost?
3. Which two final accounts show, respectively, profit over a period and financial position at a point in time, and what are they called in this guide?
4. Why can a profitable business still fail from a cash flow problem?
5. Name the two investment appraisal methods used at both levels, the additional HL-only method, and one weakness of each.
6. (HL) What does a high gearing ratio indicate about a business’s capital structure and risk?

Answers: 1. Internal: retained profit or sale of assets. External: a bank loan or share issue (any valid internal/external pair appropriate to expansion). 2. A fixed cost does not change with output level (e.g. rent); a variable cost changes directly with output (e.g. raw materials). 3. The profit and loss account (profit over a period) and the balance sheet (position at a point in time). 4. Because profit is an accounting measure of revenue minus costs, while cash flow depends on when money is actually received and paid – a business can record a sale as profit before the cash is collected, or tie up cash in stock and fixed assets, leaving it unable to pay short-term bills despite being profitable. 5. Payback period (ignores profitability after payback) and average rate of return (ignores timing of returns) at both levels; net present value (HL only, depends on a chosen discount rate). 6. A high proportion of the business’s capital employed comes from debt rather than equity, meaning greater risk from interest obligations but potentially higher returns to equity holders if the investment performs well.

Official syllabus

International Baccalaureate Organization, Diploma Programme Business Management guide, first assessment 2024, published February 2022 and updated May 2022 – the same source already cited by the full syllabus guide, which first reproduced Unit 3’s nine numbered sub-topics from it.