What you'll learn
Working capital is the money tied up in the day-to-day running of a business: inventory on the shelves, money owed by customers, and cash in the bank, less the money owed to suppliers and other short-term creditors. Managing it means holding enough to trade comfortably without holding so much that cash sits idle.
The tension runs through every element. Hold too little inventory and you lose sales and disrupt production; hold too much and you tie up cash, pay to store it and risk obsolescence. Give too little credit and customers go elsewhere; give too much and you finance their businesses out of your own bank account. Take too little credit from suppliers and you forgo free finance; take too much and you lose discounts and eventually goodwill.
The reason this matters more than almost anything else in the syllabus is that most business failures are cash failures, not profit failures. A profitable business that lets its working capital cycle stretch can run out of money while its income statement still looks healthy — a situation called overtrading.
By the end of this topic you should be able to calculate and interpret the working capital cycle, explain how each element is managed, and recognise and diagnose overtrading.
Key terms and definitions
Working capital — current assets less current liabilities. Also called net current assets.
Working capital cycle (cash operating cycle) — the number of days between paying for goods and receiving cash from the customer who buys them.
Inventory days — average inventory ÷ cost of sales × 365.
Receivables days — receivables ÷ credit sales × 365.
Payables days — payables ÷ credit purchases × 365.
Overtrading — expanding sales faster than the business can finance the resulting working capital.
Factoring — selling receivables to a finance company for immediate cash, at a discount.
Just-in-time (JIT) — an inventory approach in which goods arrive as needed, minimising holdings.
Cash discount — a reduction offered to customers for prompt settlement, or received from suppliers for the same.
Core concepts
The working capital cycle
The cycle is inventory days plus receivables days less payables days. It measures how long the business must finance itself between paying out and being paid.
A business holding stock for 60 days, collecting in 56 days and paying suppliers in 30 days finances 86 days of trading from its own resources. Shortening any of the three releases cash without changing profit at all — which is why this is the single most practical figure in the topic.
Lengthening the payables period is the cheapest improvement available, but it has limits: stretching suppliers costs discounts, damages the relationship, and eventually results in supply being withdrawn.
Managing inventory
The objective is the level that balances the cost of holding against the cost of running out. Holding costs include storage, insurance, obsolescence and the finance tied up. Stockout costs include lost sales, idle production and emergency purchases at premium prices.
Practical techniques include setting reorder levels and buffer stock, applying ABC analysis to concentrate control on the high-value items that represent most of the money, and moving towards just-in-time where suppliers are reliable enough.
JIT deserves a caution in a Caribbean context. It depends on frequent, dependable delivery, and where inputs are imported and shipping is subject to weather and port delays, a buffer that a textbook would call excess is often prudent. Saying that in an answer shows judgement rather than recall.
Managing receivables
Credit is a marketing tool that costs money, and managing it means four things: assessing creditworthiness before granting terms, setting a credit limit and payment period, monitoring through an aged receivables analysis, and collecting through statements, reminders and, eventually, legal action.
A cash discount speeds collection but is expensive. Offering 2% for settlement 30 days early is paying 2% for one month's money — an annual rate far above most borrowing costs — so it is worth doing only where the cash is genuinely needed or the debt is at risk.
Factoring converts receivables to cash immediately, at a cost. It suits a growing business whose receivables are climbing faster than its bank facility, and it removes the collection workload, but it is dearer than an overdraft and customers know the business has sold its debts.
Managing payables and cash
Trade credit is free finance and should be used to the terms agreed. Beyond those terms it stops being free: discounts are lost, suppliers tighten terms, and in the worst case supply stops.
Cash itself needs managing in both directions. Too little risks insolvency; too much represents a return forgone, since idle balances earn nothing. The tools are the cash budget, which shows shortfalls in advance, and short-term deposits for temporary surpluses.
Sources of short-term finance
When the cycle cannot be shortened far enough, the gap has to be financed, and the choice of source is itself examinable.
An overdraft is flexible and interest is paid only on the amount used, which suits a seasonal business whose need fluctuates. It is repayable on demand, however, so relying on one to fund permanent working capital is risky.
A short-term loan costs more in total but gives certainty over a fixed term, which suits a known requirement such as stocking up before a peak season.
Trade credit is free within the agreed terms and is the first source to use fully.
Factoring converts receivables to cash immediately and removes the collection workload, at a price above an overdraft.
The principle worth stating in an answer is that finance should match the life of what it funds. A permanent increase in working capital caused by genuine growth is a long-term need and should be met from long-term finance or retained profit — funding it with an overdraft is precisely how an overtrading business ends up exposed when the bank reconsiders.
Overtrading
Overtrading is the most examinable idea here. A business wins more orders, buys more inventory and extends more credit, all of which consume cash before any of the new sales are collected. Sales and profit both rise while the bank balance falls.
The warning signs are a rising overdraft alongside rising sales, lengthening payables days as the business stretches suppliers, falling liquidity ratios, and rapid growth in receivables and inventory relative to revenue.
The remedies are to slow growth, raise long-term finance to fund the expanded working capital, tighten collection, or reduce inventory. Note that the underlying problem is not lack of profitability — it is that growth was financed from working capital rather than from capital.
Worked examples
Example 1 — The working capital cycle (6 marks)
A business has average inventory of $50,000 against cost of sales of $301,000; receivables of $71,000 against credit sales of $460,000; and payables of $44,000 against credit purchases of $310,000.
Inventory days = $50,000 ÷ $301,000 × 365 = 60.6 days. Receivables days = $71,000 ÷ $460,000 × 365 = 56.3 days. Payables days = $44,000 ÷ $310,000 × 365 = 51.8 days.
Working capital cycle = 60.6 + 56.3 − 51.8 = 65.1 days.
The business finances about 65 days of trading itself. Cutting inventory days by ten would release roughly $8,250 of cash — $301,000 ÷ 365 × 10 — without any change in profit.
Example 2 — The cost of a cash discount (5 marks)
A business offers 2% for settlement within 10 days, where the normal term is 40 days.
The discount buys the money 30 days earlier at a cost of 2% of the invoice.
Approximate annual cost = 2% × (365 ÷ 30) = 2% × 12.17 = 24.3%.
Paying an effective 24% a year to accelerate collection is only sensible if the alternative borrowing costs more, or if the customer might otherwise not pay at all. Stating the comparison, rather than simply calculating the rate, is what earns the judgement mark.
Example 3 — Diagnosing overtrading (5 marks)
Over two years, revenue rose from $400,000 to $620,000; receivables from $60,000 to $118,000; inventory from $40,000 to $78,000; the overdraft from nil to $46,000; and profit rose modestly.
Revenue grew by 55%. Receivables grew by 97% and inventory by 95% — both nearly twice as fast as sales. The overdraft appeared from nothing.
The diagnosis is overtrading: the business expanded faster than it could finance, so the growth was funded by the bank and by stretching payables rather than by capital. Profit rising alongside makes it more dangerous, not less, because the income statement gives no warning.
Example 4 — Releasing cash (4 marks)
Suppose the business in Example 1 cuts receivables days from 56.3 to 40 by tightening collection.
Days saved = 56.3 − 40 = 16.3 days. Cash released = $460,000 ÷ 365 × 16.3 = $20,542.
That is cash freed without selling a single extra unit. It is also the strongest kind of recommendation to make to a small business, because it requires no investment — only a change in practice.
Common mistakes and how to avoid them
Adding payables days instead of subtracting. Supplier credit shortens the cycle; it is the one element that helps.
Using revenue instead of cost of sales for inventory days. Inventory is carried at cost, so the denominator must be at cost.
Using total revenue instead of credit sales for receivables days. Cash sales create no receivable.
Treating overtrading as unprofitability. It is a financing problem in a business that is often profitable.
Recommending JIT without considering supply reliability. Where inputs are imported, a buffer may be prudent rather than wasteful.
Assuming more working capital is always better. Idle cash and excess inventory both represent a return forgone.
Offering a cash discount without costing it. Convert it to an annual rate before recommending it.
How this links to your Internal Assessment
Working capital analysis is among the most useful things an Internal Assessment can offer a small business, because the recommendations cost nothing to implement and the owner feels the effect immediately.
Calculate the cycle from the business's own figures, then quantify what a realistic improvement would release, as in Example 4. A recommendation stating that collecting 15 days faster would free roughly $20,000 is far more persuasive than one advising the owner to "improve credit control".
Prepare an aged receivables analysis if the records allow it. It very often reveals that a small number of customers account for most of the overdue balance, which turns a general problem into a specific action.
Be realistic about what the business can change. A firm whose customers are larger and more powerful than it is may have little leverage over payment terms, and saying so is better analysis than recommending something the owner cannot enforce.
Exam technique for working capital management
Calculation questions want the three ratios and the cycle, so set them out in that order with the formula shown for each. State the unit — days — and keep one decimal place unless told otherwise.
Interpretation questions want a cause and a consequence. A lengthening receivables period is a fact; the consequence is pressure on the bank balance while reported profit is unchanged, and that distinction is worth stating explicitly.
Overtrading questions almost always supply two years of figures. Compute the growth rates of revenue, receivables and inventory and compare them — the diagnosis is that the last two outpaced the first.
Command words follow the usual pattern. Calculate the cycle wants the three components. Explain overtrading wants the mechanism, not a definition. Discuss the use of factoring wants cost against benefit. Recommend wants specific, costed actions and an acknowledgement of what the business can realistically enforce.
Where a question asks about inventory policy in a Caribbean setting, mention import lead times and shipping reliability. It is a genuine constraint and examiners reward the context.
Quick revision summary
- Working capital = current assets − current liabilities.
- Cycle = inventory days + receivables days − payables days.
- Inventory days use cost of sales; receivables days use credit sales; payables days use credit purchases.
- Shortening the cycle releases cash without changing profit.
- Inventory management balances holding costs against stockout costs; ABC analysis concentrates effort on high-value items.
- JIT depends on reliable supply — import lead times make a buffer prudent in the Caribbean.
- Receivables management: assess, set limits, monitor by ageing, collect.
- A 2% discount for 30 days early is roughly 24% a year — cost it before offering it.
- Factoring gives immediate cash at a price above an overdraft.
- Trade credit is free finance within the agreed terms and expensive beyond them.
- Overtrading: sales and profit rise while cash falls, because growth was financed from working capital rather than capital.