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Acid test ratio AO2, AO4

AO2 You need to be able to: Demonstrate application and analysis of knowledge and understanding Command Terms: These terms require students to use their knowledge and skills to break down ideas into simpler parts and to see how the parts relate: Analyse, Apply, Comment, Demonstrate, Distinguish, Explain, Interpret, Suggest

AO4 You need to be able to Demonstrate a variety of appropriate skills. Command Terms These terms require you to demonstrate the selection and use of subject-specific skills and techniques: Annotate, Calculate, Complete, Construct, Determine, Draw, Identify, Label, Plot, Prepare

The acid test ratio is the strictest test of liquidity. The term is derived from the use of nitric acid for testing gold.

This is on the IB Formula sheet


This ratio is a measure of risk, the risk of going bankrupt and failing. The risk increases as the value of the ratio falls. A value of 1.0 is considered to be satisfactory as this means that the firm has sufficient liquid assets to meets its liabilities. Much below 1.0 is generally dangerous, whilst ratios well above 1.0 may be a sign of poor cash management. A firm can be too liquid; it is then not using its resources well enough.

Be careful, though, as this ratio, like many others, is industry dependant. Look at the accounts for a major supermarket and you may find very 'poor' acid test scores, but there clearly is no real risk. They are strong companies which sell for cash, but get very good credit terms from their suppliers.

So, if you are trying to come to some conclusions about a company, get some accounts for other firms in the same industry. That will put the ratio into the correct context.

Calculation of ratios


Follow the link below to get the balance sheet for Student Computers plc and calculate the current and acid test ratios. When you have finished, follow the answer link below to see how you got on. N.B. Calculate the ratios for both years to compare them.

Balance sheet - Student Computers Plc

Answer - current and acid test ratios - Student Computers Plc


Perhaps now is the time to go and get some real Annual Reports and Accounts. They are free and easy to get. Write to the Company Secretary; get on the Internet, perhaps using one of the services like the one offered on the web by the Financial Times. Another useful site for accessing annual reports is CAROL. You have to register, but use of the service is free. These reports make interesting reading, especially if you pick household names.

How can a firm improve its liquidity ratios? AO3

AO3 You need to be able to: Demonstrate synthesis and evaluation. Command terms these terms require you to rearrange component ideas into a new whole and make judgments based on evidence or a set of criteria. Compare,  Compare and contrast, Contrast, Discuss, Evaluate, Examine, Justify, Recommend, To what extent

Mathematically, to increase a liquidity ratio, a firm must increase its current assets other than stock (if acid test ratio); reduce its current liabilities, or both.

The objective is to generate more cash, but with less outstanding short-term debts. Let's examine each in turn:

  • Increase current assets - current assets are stock, debtors and cash. It is important to increase cash as a priority. This may be done through increased overdraft levels or additional loans. The firm may raise additional finance through share issues. All assets should be examined and unwanted ones sold, or turned into cash.

To improve the acid-test ratio, stock should be reduced and sold for cash. The firm may implement a just-in-time stock control system to lower tied up stock. All business activities and expenses can be examined and improvements in efficiency planned and put into action. Often, making staff redundant will reduce staff costs. Customers should be pressed to pay any outstanding accounts. Current assets should be made as liquid as possible, and increased.

  • Decrease current liabilities - short-term loans and overdrafts may be rescheduled and converted into long-term loans. This will give the firm time. Dividends may be cut so as to conserve cash. Creditors can be contacted and payment terms re-organised.