Acid Test Ratio

The acid test ratio, also called the quick ratio, is a liquidity metric that measures a company’s ability to pay its short-term obligations using its most liquid assets, excluding inventory. It is a stricter version of the current ratio because it removes inventory, which may not be quickly convertible to cash.

What Is the Acid Test Ratio?

Acid Test Ratio = (Cash + Short-term Investments + Accounts Receivable) / Current Liabilities

Or equivalently:
Acid Test Ratio = (Current Assets – Inventory – Prepaid Expenses) / Current Liabilities

This ratio focuses only on assets that can be converted to cash quickly (within days or weeks).

Why Exclude Inventory?

Inventory can take months to sell (especially in manufacturing, real estate, or specialty goods). If a company faces a financial crisis, it cannot always sell inventory quickly to raise cash. The acid test ratio therefore gives a more conservative view of immediate liquidity.

Interpreting the Acid Test Ratio

| Ratio | Interpretation |
|——-|—————|
| Below 0.5x | Very low liquidity; potential distress |
| 0.5x to 1.0x | Borderline; may need to manage cash carefully |
| 1.0x | Can exactly cover current liabilities with liquid assets |
| Above 1.0x | Good liquidity; comfortable buffer |

A ratio of 1.0x or above is generally considered adequate.

Acid Test vs Current Ratio

| Feature | Current Ratio | Acid Test |
|———|————–|———-|
| Includes inventory | Yes | No |
| Conservative | Less | More |
| Formula | Current Assets / Current Liabilities | (Current Assets – Inventory) / Current Liabilities |

For companies with slow-moving or illiquid inventory, the acid test ratio is a better measure of real liquidity.

Practical Example

A retailer has current assets of Rs 200 crore (including Rs 100 crore in inventory) and current liabilities of Rs 150 crore. Current ratio = 200/150 = 1.33x. Acid test ratio = (200 – 100) / 150 = 0.67x. The lower acid test ratio reveals that without inventory, the company can cover only 67% of its short-term obligations, signalling tighter liquidity than the current ratio implies.

Key Takeaways

– Acid test ratio = (Current Assets – Inventory) / Current Liabilities; measures immediate liquidity
– Excludes inventory as it cannot always be quickly converted to cash
– A ratio of 1.0x or above is generally considered adequate; below 0.5x is a warning sign
– More conservative and meaningful than current ratio for industries with high or illiquid inventory
– Used by lenders, creditors, and analysts to assess short-term payment capacity in a stress scenario