In simple terms
A friendly intro before the formal notes — no formulas yet.
Liquidity ratios
9609 A Level — current and acid test ratios, interpretation, and liquidity improvements.
- 1
Liquidity measures the ability to pay short-term debts.
- 2
It focuses on the relationship between current assets and current liabilities.
- 3
A profitable business can still fail due to poor liquidity (insolvency).
- 4
Good liquidity is essential for stakeholder confidence (e.g., suppliers, banks).
Explore the concept
Use the live diagram and synced steps — play it or tap a step card to walk through.
Key formulas
Tap any symbol to reveal exactly what it means and its units.
Tap a symbol — great for exam definitions
At a glance — side by side
Compare key properties side by side — ideal for exam contrasts.
Comparison of Current Ratio and Acid Test Ratio
| Feature | Current Ratio | Acid Test (Quick) Ratio |
|---|---|---|
| Formula | Current Assets / Current Liabilities | (Current Assets - Inventories) / Current Liabilities |
| Assets Included | Includes all current assets: cash, receivables, and inventories. | Excludes inventories; only includes more liquid assets like cash and receivables. |
| Purpose | Provides a general overview of the ability to meet short-term obligations. | Provides a more immediate and severe test of liquidity, assuming inventories cannot be sold. |
| Ideal Guideline | Generally 1.5:1 to 2:1 | Generally around 1:1 |
| Relevance | Useful for most businesses, but can be misleading for firms with high, slow-moving inventory. | Especially important for businesses with high inventory levels, such as retailers or manufacturers. |
Formula
Current Ratio
Acid Test (Quick) Ratio
Assets Included
Current Ratio
Acid Test (Quick) Ratio
Purpose
Current Ratio
Acid Test (Quick) Ratio
Ideal Guideline
Current Ratio
Acid Test (Quick) Ratio
Relevance
Current Ratio
Acid Test (Quick) Ratio
Full topic notes
Formal explanation with the rigour you need for the exam.
Understanding Liquidity and its Importance
Liquidity is a measure of a business's ability to meet its short-term debts and financial obligations as they fall due, typically within the next 12 months. It essentially assesses the availability of liquid assets (cash or assets that can be quickly converted into cash) to pay off current liabilities. A business that is illiquid faces a significant risk of insolvency, even if it is profitable on paper. This is because profit is an accounting concept, whereas cash is required for day-to-day survival – paying suppliers, employees, and overheads. Maintaining adequate liquidity is crucial for building confidence with suppliers, who may be willing to offer favourable credit terms, and with lenders, who will assess liquidity before approving loans. It provides a vital safety buffer against unexpected expenses or a sudden drop in revenue.
Liquidity measures the ability to pay short-term debts.
It focuses on the relationship between current assets and current liabilities.
A profitable business can still fail due to poor liquidity (insolvency).
Good liquidity is essential for stakeholder confidence (e.g., suppliers, banks).
The Current Ratio
The current ratio is a primary measure of liquidity, calculated using the formula: Current Assets / Current Liabilities. The result is expressed as a ratio, for example, 2:1. This indicates that for every £1 of current liabilities, the business has £2 of current assets to cover them. While there is no single 'perfect' ratio, a generally accepted guideline for many industries is between 1.5:1 and 2:1. A ratio below 1:1 is a cause for concern as it suggests the business may not have enough liquid assets to cover its short-term debts. Conversely, a very high ratio (e.g., 4:1) might not be ideal either, as it could indicate that too much capital is tied up in unproductive assets like excess inventories or large cash balances, which could be invested for a better return.
Formula: Current Assets / Current Liabilities.
Measures a firm's ability to pay short-term debts using all its current assets.
A generally accepted 'safe' range is 1.5:1 to 2:1.
A very high ratio can indicate inefficient use of working capital.
The Acid Test (Quick) Ratio
The acid test ratio, also known as the quick ratio, provides a more stringent and immediate assessment of a firm's liquidity. It is calculated by the formula: (Current Assets - Inventories) / Current Liabilities. The key difference is the exclusion of inventories (stock) from current assets. This is because inventories are often the least liquid of all current assets; they cannot be converted into cash instantly and may have to be sold at a discount to be liquidated quickly. For businesses with slow-moving or specialised inventories, the acid test ratio is a much more realistic indicator of their ability to meet immediate obligations. An ideal result is often considered to be around 1:1, signifying that the business has £1 of liquid assets for every £1 of current liabilities, without needing to sell any inventory.
Formula: (Current Assets - Inventories) / Current Liabilities.
A more severe test of liquidity as it excludes the least liquid asset (inventories).
A result of 1:1 is often considered ideal.
Particularly useful for businesses with high inventory levels or slow-selling products.
Interpretation and Strategies for Improvement
Interpreting liquidity ratios requires context. A single ratio is a snapshot in time and offers limited insight. For meaningful analysis, ratios should be compared over several years to identify trends (trend analysis) and benchmarked against key competitors or the industry average. For example, a supermarket may operate successfully with a low current ratio due to high inventory turnover and cash sales, whereas a luxury car dealership would require a much higher ratio. If liquidity is poor, a business can take several actions. Short-term strategies include arranging an overdraft or delaying payments to suppliers. More sustainable, long-term improvements involve selling unproductive non-current assets, using sale and leaseback for property, or implementing Just-in-Time (JIT) inventory management to reduce capital tied up in stock. These actions can improve cash flow and strengthen the balance sheet.
Current ratio =
Acid test =
Analyse ratios by comparing them over time and against industry averages.
Consider the nature of the business when interpreting results.
Short-term improvements: overdrafts, trade credit negotiation.
Long-term improvements: sell idle assets, sale and leaseback, reduce inventory levels.
In exam answers, do not just state the ratio results. You must interpret them in the context of the business in the case study. For example, explain why a high inventory level might be a problem for that specific business and therefore why the acid test ratio is a more relevant indicator than the current ratio. Always use the data to justify your conclusions.
Worked examples
See the formulas applied — reveal one step at a time, like the exam.
Current assets $240 000 (including inventory $90 000). Current liabilities
Calculate both ratios and comment.
- 1
Current ratio = 240 000 ÷ 160 000 = 1.5 : 1
Tech Innovate Ltd provides the following data from its Statement of Financial Position for the last two years. Calculate the current and acid test ratios for both years and comment on the change in the company's liquidity position.
| Item | 2023 ($) | 2022 ($) |
|---|---|---|
| Current Assets | 500,000 | 450,000 |
| --- | --- | --- |
| Inventories | 280,000 | 200,000 |
| Current Liabilities | 250,000 | 220,000 |
- 1
Step 1: Calculate ratios for 2023
How it all connects
The big idea sits in the middle — tap a linked idea to explore the link.
Tap a linked idea to see how it connects back to the main topic — that connection is what examiners reward.
Glossary
Try to recall each definition before you reveal it.
Quick check
Answer in your head first — then tap to check. No pressure.
Revision flashcards
Flip the card. Test yourself before the exam.
Current ratio formula?
Current assets ÷ Current liabilities.
Key takeaways
Review these before you close the topic — retrieval beats re-reading.
- ✓
Liquidity measures the ability to pay short-term debts.
- ✓
It focuses on the relationship between current assets and current liabilities.
- ✓
A profitable business can still fail due to poor liquidity (insolvency).
- ✓
Good liquidity is essential for stakeholder confidence (e.g., suppliers, banks).
Practice — then mark it
The whole point: a real Cambridge question, marked mark-by-mark.
Mark a liquidity ratios question
Mark a liquidity ratios question
Extra simulations & links
PhET, GeoGebra and other curated tools — open in a new tab.
Frequently asked
Checkpoint
One marked question is worth ten re-reads — close the loop before you move on.
Reading it isn’t knowing it — prove it.
Before you move on: do Mark a liquidity ratios question on paper, snap a photo, and get examiner-style feedback on exactly where you win and lose marks.