Financial Management · Management of inventories, accounts receivable, accounts payable and cash

Working Capital Cycle and Cash Operating Cycle for ACCA FM

Updated 11 October 2026 · Fact-checked

The cash operating cycle is the time between paying suppliers and receiving cash from customers. Calculate it as inventory days plus receivable days minus payable days. A longer cycle ties up more cash and needs more funding. You then compare it with past years, targets or competitors.

Understand Working Capital Cycle and Cash Operating Cycle

Working capital is current assets minus current liabilities. The main current assets are inventory, trade receivables and cash. Trade payables are the main current liability. A business needs enough working capital to pay bills on time. Too little causes liquidity trouble. Too much wastes money that could earn a return.

The cash operating cycle (also called the working capital cycle) tracks how long cash is tied up. You buy materials, often on credit. You hold them, make goods and sell them. Customers then take credit before they pay. Cash goes out when you pay suppliers and comes back when customers pay. The gap between those two events is the cycle.

Three periods build the cycle. Inventory days show how long stock is held. Receivable days show how long customers take to pay. Payable days show how long you take to pay suppliers. Payable days reduce the cycle because suppliers fund part of it.

The cycle is not the same as the working capital figure. Working capital is an amount of money at one date. The cycle is a length of time. Both matter, but the cycle shows how efficiently you manage the flow.

Overtrading means expanding sales fast without enough long-term finance. Inventory and receivables grow, cash runs out and the firm relies on overdrafts and suppliers. It can fail while profitable. Overcapitalisation is the opposite: too much working capital, with idle cash or excess inventory, which lowers returns.

Key rules to remember

Inventory days: Inventory days = (Inventory ÷ Cost of sales) × 365; For a manufacturer you may split into raw materials (÷ purchases or material usage), WIP (÷ cost of production) and finished goods (÷ cost of sales).
Receivable days: Receivable days = (Trade receivables ÷ Credit sales) × 365; Use credit sales, not total sales, if the data gives both. Use revenue only if no split is given.
Payable days: Payable days = (Trade payables ÷ Credit purchases) × 365; Use credit purchases if given. Otherwise use cost of sales as an approximation and state the assumption.
Cash operating cycle: Cycle = Inventory days + Receivable days − Payable days; For a manufacturer, add raw material, WIP and finished goods days, then add receivable days and subtract payable days.
Working capital: Working capital = Current assets − Current liabilities; An amount at a point in time, not a period.
Current ratio and quick ratio: Current ratio = Current assets ÷ Current liabilities; Quick ratio = (Current assets − Inventory) ÷ Current liabilities; Rules of thumb such as 2:1 and 1:1 vary by industry. Do not treat them as fixed targets.

How to solve Working Capital Cycle and Cash Operating Cycle questions

Use this method for any calculation or discussion question on the cycle.

1Identify which figures the question gives: revenue, cost of sales, purchases, and year-end balances.
2Choose the correct denominator for each ratio: cost of sales for inventory, credit sales for receivables, credit purchases for payables.
3Calculate each period in days using 365 unless the question says otherwise.
4Combine them: inventory days plus receivable days minus payable days.
5Compare with the prior year, an industry average or a target, and say whether the cycle has lengthened or shortened.
6Explain the cause of each change, such as slower customer payment or building up stock.
7State the effect on cash, overdraft and financing needs, and suggest actions.
8Write assumptions, such as using revenue when credit sales are not given.

Quickest way: Three ratios, one line

When to use it: Use in Section A or B objective questions when you only need the cycle or one period.

Write the three fractions straight from the data, for example 40 ÷ 300 × 365.
Calculate each to the nearest day, or use the exact figure if options are close.
Compute inventory + receivables − payables on one line.
Check the sign: payables are always subtracted.
Check that the answer is in days and matches one option.

Common mistakes in Working Capital Cycle and Cash Operating Cycle

Adding payable days instead of subtracting them.
Students treat all three periods as similar items.
Fix: Remember payables are cash you have not paid yet. They shorten the cycle, so subtract.
Using revenue for inventory days and payable days.
Revenue is the first figure on the statement.
Fix: Use cost of sales (or purchases) for inventory and payables. Revenue is for receivables only.
Ignoring credit sales and credit purchases when given.
Students grab the total figure automatically.
Fix: Read the data for a credit split. Use it when provided and state any assumption otherwise.
Confusing working capital with the cash operating cycle.
Both terms contain the words working capital.
Fix: Working capital is an amount in money. The cycle is a number of days.
Saying a longer cycle is always bad, or a high current ratio is always good.
Students memorise one-sided rules.
Fix: Judge against the industry and policy. A very high ratio may signal overcapitalisation. Supermarkets often have short cycles and low ratios.
Treating overtrading as a problem of losses.
Students link failure with unprofitability.
Fix: Overtrading is rapid growth with too little finance. Symptoms are rising sales, stock and receivables, falling cash, rising overdraft and falling liquidity ratios.

Worked examples

Example 1

A company has revenue of $1,200,000, all on credit, and cost of sales of $800,000. Opening inventory was $190,000 and closing inventory is $120,000, so credit purchases are $730,000 (190,000 + 730,000 − 120,000 = 800,000). Year-end trade receivables are $200,000 and trade payables $90,000. Calculate the cash operating cycle.

Show the solution

Purchases differ from cost of sales because inventory fell during the year. Cost of sales = opening inventory + purchases − closing inventory, so 190,000 + 730,000 − 120,000 = 800,000.
Inventory days = 120,000 ÷ 800,000 × 365 = 54.75 days.
Receivable days = 200,000 ÷ 1,200,000 × 365 = 60.83 days.
Payable days = 90,000 ÷ 730,000 × 365 = 45.00 days.
Cycle = 54.75 + 60.83 − 45.00 = 70.58 days.

Answer: The cash operating cycle is about 71 days.

Example 2

A company's sales grew by 60% in a year. Receivable days rose from 40 to 65. Inventory days rose from 50 to 70. Payable days rose from 45 to 80. The overdraft has doubled and the current ratio fell from 1.8 to 1.1. Calculate the change in the cash operating cycle and comment on whether overtrading may be present.

Show the solution

Old cycle = 50 + 40 − 45 = 45 days.
New cycle = 70 + 65 − 80 = 55 days.
Change = 55 − 45 = an increase of 10 days.
Growth of 60% with longer inventory and receivable days means more cash is tied up in each unit of sales.
Payable days stretched from 45 to 80, so the firm is relying on suppliers to fund growth, which may risk supplier refusal or loss of early settlement discounts if offered.
The doubled overdraft and falling current ratio show liquidity is weakening.

Answer: The cycle lengthened by 10 days, from 45 to 55. The pattern of fast sales growth, higher inventory and receivables, stretched payables, a rising overdraft and a falling current ratio points to overtrading. Remedies include raising long-term finance such as equity or long-term debt, tightening credit control, reducing inventory, and slowing growth until funding is in place.

Exam tips

In objective tests, read which figure each ratio needs. Wrong denominators are the usual trap.
Use 365 days unless told otherwise and keep decimals until the final answer.
In written answers, give the calculation first, then comment on causes, effects and actions. Calculation alone scores little on the discussion marks.
For overtrading, link each symptom to the data given, and give remedies as well as symptoms.
Remember that industry context matters. Say whether a change is good or bad for that type of business.

Practice questions from Management of inventories, accounts receivable, accounts payable and cash

Working Capital Cycle and Cash Operating Cycle in other exams

The same ground in other exams, if you are preparing for more than one or want another angle on it.

Working Capital Cycle and Cash Operating Cycle: frequently asked questions

What is the difference between working capital and the cash operating cycle?

Working capital is an amount: current assets less current liabilities at a date. The cash operating cycle is a length of time, in days, between paying suppliers and receiving cash from customers. One measures size, the other measures speed.

How do you calculate the cash operating cycle in ACCA FM?

Add inventory days and receivable days, then subtract payable days. Inventory days use cost of sales, receivable days use credit sales and payable days use credit purchases. Use 365 days unless told otherwise.

What are the symptoms of overtrading?

Typical symptoms are fast sales growth, rising inventory and receivables, falling cash and a growing overdraft. Liquidity ratios fall and payable days often lengthen. Profit may still look healthy.

What are the remedies for overtrading?

Raise long-term finance such as equity or long-term loans. Improve control of receivables and inventory, and negotiate better supplier terms. You can also slow down expansion until funding catches up.