Financial Management · The nature, elements and importance of working capital

Working Capital Cycle and Ratio Analysis for ACCA FM

Updated 11 October 2026 · Fact-checked

The cash operating cycle is inventory days plus receivable days minus payable days. It shows how long cash is tied up between paying suppliers and collecting from customers. The current ratio and quick ratio test short-term liquidity. In FM you calculate them, interpret them and suggest ways to improve working capital efficiency.

Understand Working Capital Cycle and Ratio Analysis

Working capital is the money a business needs to run day to day. It is current assets less current liabilities. The main items are inventory, trade receivables, cash and trade payables.

The cash operating cycle (also called the working capital cycle or cash conversion cycle) measures time. A business buys materials on credit, holds them as inventory, sells them on credit, then collects cash. The cycle is the gap between paying suppliers and receiving cash from customers. A longer cycle means more cash is tied up and more financing is needed.

You measure each stage in days. Inventory days show how long stock is held. Receivable days show how long customers take to pay. Payable days show how long the business takes to pay suppliers. Payable days reduce the cycle because suppliers are funding you for that period.

The current ratio and quick ratio look at liquidity at one date. They compare liquid assets with current liabilities. They do not measure time. Use them with the cycle to judge whether working capital is efficient, too tight or too loose.

There is no single ideal figure. Compare with prior years, the industry and the company's policy. A supermarket sells for cash and carries low receivables, so a low current ratio can be normal for it.

Key rules to remember

Inventory days: Inventory days = (Inventory ÷ Cost of sales) × 365; Use average inventory only if the question says so. For a manufacturer, raw materials, work in progress and finished goods may be calculated separately.
Receivable days: Receivable days = (Trade receivables ÷ Credit sales) × 365; Use credit sales if given. If not, use total revenue and state the assumption.
Payable days: Payable days = (Trade payables ÷ Credit purchases) × 365; If purchases are not given, use cost of sales and state the assumption.
Cash operating cycle: Cycle = Inventory days + Receivable days − Payable days; Answer is in days. A lower figure is generally better, other things equal.
Current ratio: Current ratio = Current assets ÷ Current liabilities; Often expressed as x : 1. Do not treat 2 : 1 as a rule for every business.
Quick ratio (acid test): Quick ratio = (Current assets − Inventory) ÷ Current liabilities; Removes inventory because it may be slow to turn into cash.

How to solve Working Capital Cycle and Ratio Analysis questions

Use this method for any question on the cycle or liquidity ratios.

1Read the question and note which figures are given: cost of sales, revenue, purchases, year-end balances.
2Choose the correct base for each ratio: cost of sales for inventory, credit sales for receivables, credit purchases for payables.
3Calculate each ratio with 365 days unless told otherwise. Show the working.
4Combine them: inventory days + receivable days − payable days.
5Calculate the current and quick ratios from the statement of financial position.
6Compare with the prior year, industry or target. State the direction and size of change.
7Explain causes and risks, such as overtrading, excess funding cost or supplier strain.
8Recommend practical actions only if asked, and link each to a stage of the cycle.

Quickest way: Three bases, one subtraction

When to use it: Use in Section A and OT cases where you need a single number fast.

Write the three fractions in one line: Inv/COS, Rec/Sales, Pay/Purchases.
Multiply each by 365 and round to the nearest day only at the end.
Add the first two, subtract the third.
For the quick ratio, strip inventory from current assets before dividing.
Check the sign: if payable days exceed the other two combined, the cycle is negative, which is possible.

Common mistakes in Working Capital Cycle and Ratio Analysis

Using revenue for inventory days.
Revenue is the number students see first.
Fix: Inventory is held at cost, so divide by cost of sales.
Adding payable days instead of subtracting.
All three are called days, so students sum them.
Fix: Payables are a source of finance. Subtract them from the cycle.
Using total revenue when credit sales are given.
Students ignore the detail in the question.
Fix: Check for a credit sales or credit purchases figure before choosing the base.
Treating a higher current ratio as always better.
Students link a high ratio with safety.
Fix: A very high ratio may mean idle cash, excess inventory or slow-paying customers. Comment on both sides.
Leaving inventory in the quick ratio.
Students rush and reuse the current ratio numerator.
Fix: Subtract inventory from current assets first.
Giving a ratio with no interpretation.
Students stop once the number is found.
Fix: Say what the figure means, how it compares and what could cause it.

Worked examples

Example 1

A company has the following figures: revenue $1,800,000 (all on credit), cost of sales $1,200,000, credit purchases $1,000,000, inventory $200,000, trade receivables $300,000, trade payables $150,000. Calculate the cash operating cycle.

Show the solution

Inventory days = 200,000 ÷ 1,200,000 × 365 = 60.8 days.
Receivable days = 300,000 ÷ 1,800,000 × 365 = 60.8 days.
Payable days = 150,000 ÷ 1,000,000 × 365 = 54.75 days.
Cycle = 60.83 + 60.83 − 54.75 = 66.9 days.

Answer: The cash operating cycle is about 67 days.

Example 2

A company has inventory $90,000, trade receivables $120,000, cash $30,000, trade payables $100,000 and a bank overdraft $50,000. Calculate the current and quick ratios and comment.

Show the solution

Current assets = 90,000 + 120,000 + 30,000 = 240,000.
Current liabilities = 100,000 + 50,000 = 150,000.
Current ratio = 240,000 ÷ 150,000 = 1.6.
Quick assets = 240,000 − 90,000 = 150,000.
Quick ratio = 150,000 ÷ 150,000 = 1.0.

Answer: Current ratio is 1.6 : 1 and quick ratio is 1.0 : 1. The company can just cover current liabilities without selling inventory. Compare with the industry and prior year before judging whether this is adequate.

Exam tips

Check which base the question gives: credit sales, credit purchases or cost of sales. State any assumption in constructed response answers.
In Section C, set out each ratio calculation clearly so you earn method marks even if a figure is wrong.
Interpretation earns marks. Give a cause, an effect and a link to financing or risk.
For reduction questions, give actions at each stage: lower inventory, faster collection, longer supplier credit, and mention the risk of each, such as lost customers or supplier goodwill.
In objective questions, read whether the answer should be in days or as a ratio and round as the question says.

Practice questions from The nature, elements and importance of working capital

Working Capital Cycle and Ratio Analysis 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 Ratio Analysis: frequently asked questions

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

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

What is the difference between the current ratio and the quick ratio?

The current ratio uses all current assets. The quick ratio removes inventory first. The quick ratio is a tougher test because inventory can be slow to sell.

How can a company reduce its cash operating cycle?

It can cut inventory levels, collect from customers sooner, or take longer to pay suppliers. Each action has a cost or risk, such as stock-outs, lost sales or damaged supplier relationships.

Can the cash operating cycle be negative?

Yes. If payable days exceed inventory days plus receivable days, suppliers fund more than the whole cycle. This is common in businesses that sell quickly for cash.