The Quick Ratio (Acid Test): A Stricter Health Check
The quick ratio measures the ability to pay short-term debt without selling inventory. We explain how to calculate it, how it differs from the current ratio, and how to read it.
Can the business cover debt that is about to come due?
A business with good profit can still run into trouble if it lacks the cash to pay its short-term debts. The quick ratio — also called the acid-test ratio — is a fast and strict check for that ability.
What the quick ratio is
The quick ratio measures the ability to pay short-term debt using only assets that convert to cash quickly, excluding inventory.
Quick ratio = (Cash + Short-term investments + Receivables) divided by Current liabilities
Or the equivalent form:
Quick ratio = (Current assets minus Inventory) divided by Current liabilities
Why exclude inventory? Because inventory can be hard to sell, slow to move, or only sold at a steep discount — unreliable when cash is needed urgently.
How it differs from the current ratio
The current ratio counts all current assets, including inventory. The quick ratio strips inventory out, so it is stricter and more conservative.
A business with a nice current ratio (2.0) but mostly stuck inventory may have a very low quick ratio (0.6) — meaning that if it cannot sell its goods, it will be short of cash to pay debt. A large gap between the two ratios is a sign to dig into the inventory.
How to read it
- Quick ratio of 1 or more: the business has enough highly liquid assets to cover all short-term debt without touching inventory — usually considered safe.
- Quick ratio below 1: it may need to sell inventory or borrow to pay debt, so liquidity risk is higher.
- Against the industry: the "good" benchmark varies by sector. Retail with large inventory normally has a low quick ratio; a service company runs high.
Put it in the bigger picture
The quick ratio is just one piece. Read it alongside:
- Free cash flow — the real source of cash to pay debt.
- Debt-to-equity ratio — overall leverage.
- The trend over several quarters — improving or deteriorating.
A single number at one point in time means little; the trend and industry context are what matter.
Conclusion
The quick ratio measures the ability to pay short-term debt with highly liquid assets, excluding inventory — so it is stricter than the current ratio. Above 1 is usually safe; below 1 warns of liquidity risk. Use it together with cash flow and debt levels to judge whether a business has a financial cushion.
Next step
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