What Is the Acid-Test Ratio? Formula and Example
By Markets & Investing DeskUpdated Nov 10, 2026
Definition
The acid-test ratio, also called the quick ratio, measures whether a company can pay its current liabilities using only cash, marketable securities and receivables.
Key takeaways
- The acid-test ratio compares quick assets (cash, marketable securities, receivables) with current liabilities.
- "Acid-test ratio" and "quick ratio" are two names for the same metric.
- A ratio of 1.0 or higher generally means a company can cover its short-term obligations without selling inventory. Below 1.0, it may struggle to.
- The usual difference from the current ratio is the exclusion of inventory and prepaid items.
- Acceptable levels vary by industry. A very high ratio can mean cash is sitting idle.
The acid-test ratio, also called the quick ratio, measures whether a company could pay its current liabilities using only its most liquid assets: cash, marketable securities and, in most versions, accounts receivable. It leaves out inventory and other current assets that cannot be turned into cash quickly. That makes it a stricter test of short-term liquidity than the current ratio. A result of 1.0 means liquid assets exactly cover the obligations due within a year.
What Is the Acid-Test Ratio?
The acid-test ratio is a balance sheet liquidity ratio. It asks a narrow question: if every current liability came due at once, could the company pay it from assets that are already cash or close to it?
The name is generally traced to the practice of testing gold with acid to confirm the metal was genuine. The financial version applies the same idea to a balance sheet. It strips away assets whose cash value depends on future sales and checks what is left.
Analysts often describe quick assets as those that can be converted to cash within about 90 days. The current ratio, by contrast, counts everything expected to become cash within one year. Inventory and prepaid expenses fall into the second group but usually not the first.
Acid-Test Ratio Formula
There are two common ways to build the numerator. Both use the same denominator, total current liabilities.
Direct method (adding quick assets):
Acid-test ratio = (Cash and cash equivalents + Marketable securities + Accounts receivable) ÷ Current liabilities
Subtraction method (removing illiquid current assets):
Acid-test ratio = (Current assets − Inventory − Prepaid expenses − Other illiquid current assets) ÷ Current liabilities
Many textbooks and business courses, including IGCSE and IB Business syllabuses, teach a simplified version that subtracts only inventory:
Acid-test ratio = (Current assets − Inventory) ÷ Current liabilities
What goes in the numerator
- Cash and cash equivalents: always included.
- Marketable securities and short-term investments: included, because they can usually be sold quickly at a known value.
- Accounts receivable: usually included, but judgment is needed. In industries such as construction, receivables can take much longer to collect than in most businesses. Counting them in full can make a company look more liquid than it is.
- Inventory: excluded. It must be sold, and often collected on, before it becomes cash.
- Prepaid expenses, advances to suppliers and deferred tax assets: excluded. These sit in current assets but cannot be used to pay a supplier or a lender.
Goodwill and other intangible assets never enter the calculation. They are long-term assets, not current assets, so they are outside both the acid-test ratio and the current ratio.
What goes in the denominator
The denominator is total current liabilities: accounts payable, accrued expenses, short-term debt, the current portion of long-term debt, deferred revenue and any other obligation due within one year.
Example of the Acid-Test Ratio
The following is a hypothetical balance sheet extract for a manufacturer, Company A.
| Line item | Amount ($) |
|---|---|
| Cash and cash equivalents | 40,000 |
| Marketable securities | 25,000 |
| Accounts receivable | 35,000 |
| Inventory | 60,000 |
| Prepaid expenses | 10,000 |
| Total current assets | 170,000 |
| Total current liabilities | 110,000 |
Direct method: quick assets = 40,000 + 25,000 + 35,000 = 100,000. Acid-test ratio = 100,000 ÷ 110,000 = 0.91
Subtraction method: 170,000 − 60,000 − 10,000 = 100,000, which gives the same 0.91.
Current ratio for comparison: 170,000 ÷ 110,000 = 1.55
The two results tell different stories. On a current ratio basis, Company A has $1.55 of current assets for every dollar of current liabilities. Once inventory and prepaids are removed, it has about 91 cents of liquid assets per dollar owed. Paying all current obligations on time would depend on selling some inventory or collecting receivables faster than bills come due.
How transactions move the ratio
Holding everything else constant, the ratio responds to day-to-day decisions in ways that are easy to miss. Using Company A’s figures:
- Buying inventory with cash: spending $20,000 of cash on stock cuts quick assets to $80,000. The acid-test ratio falls to 0.73. The current ratio stays at 1.55, because cash has only become inventory, which is another current asset.
- A drop in cash: any fall in cash with no matching change in liabilities lowers the ratio.
- Paying down a liability with cash: paying $10,000 of payables gives 90,000 ÷ 100,000 = 0.90, a small decline. The direction depends on the starting point. When the ratio is below 1.0, paying liabilities with cash lowers it. When it is above 1.0, the same payment raises it.
- Collecting a receivable: cash rises and receivables fall by the same amount, so the ratio does not change.
How to Interpret the Acid-Test Ratio
Above 1.0. The company holds more liquid assets than current liabilities. It could meet its near-term obligations without relying on inventory sales or new financing. For most industries, analysts treat a ratio above 1.0 as a sign of sound short-term health.
Below 1.0. Liquid assets fall short of current liabilities, so the company should be viewed with more caution. That does not mean it will miss payments. Its ability to pay depends on converting inventory, generating operating cash flow or drawing on credit.
Much lower than the current ratio. A large gap between the two ratios shows that current assets are concentrated in inventory. Whether that is a concern depends on the business model. Retailers and grocers hold large inventories by design, often turn them over quickly, and can run low acid-test ratios without being in danger.
Very high. A ratio far above 1.0 is not automatically better. It can mean cash is piling up instead of being reinvested in the business, used to pay down debt or returned to shareholders. Some large technology companies with strong cash generation have reported ratios as high as 7 or 8, and some of them have drawn criticism from activist investors who wanted more of that cash paid out. Liquidity also says nothing about whether the cash is being used productively. A metric such as return on equity addresses that separate question.
The most meaningful comparisons are against peer companies in the same industry and against the same company over time. A steady slide from 1.4 to 0.8 over several quarters says more than any single reading.
Acid-Test Ratio vs. Current Ratio vs. Cash Ratio
These three liquidity ratios share a denominator and differ only in how strictly they define the assets available to pay it.
| Ratio | Numerator | Strictness |
|---|---|---|
| Current ratio | All current assets | Least strict |
| Acid-test (quick) ratio | Cash + marketable securities + receivables | Middle |
| Cash ratio | Cash + marketable securities | Most strict |
The current ratio, also called the working capital ratio, includes inventory and prepaids. It reflects the company’s broader capacity over a one-year horizon. The acid-test ratio removes those items to focus on assets that are close to cash. The cash ratio goes further and drops receivables too, which assumes no customer pays in time.
Reading them together shows where liquidity actually sits. In Company A’s example, the cash ratio is 65,000 ÷ 110,000 = 0.59, the acid-test ratio is 0.91 and the current ratio is 1.55. Each step up adds a less certain source of cash.
Both the current ratio and the acid-test ratio are often benchmarked against 1.0. Some textbooks give a higher rule of thumb for the current ratio because it counts slower assets. In both cases, industry norms matter more than a fixed threshold.
Limitations of the Acid-Test Ratio
Timing is ignored. The ratio is a snapshot of balances on one date. It does not show when liabilities fall due or when receivables will arrive. A company whose payables are due in two weeks but whose customers pay in 90 days is in a weaker position than its ratio suggests. The reverse can also hold.
Receivable quality varies. The ratio treats a dollar of receivables like a dollar of cash. Slow-paying or doubtful accounts inflate the result. Pairing the ratio with days sales outstanding or an aging schedule helps.
There is no single standard formula. Analysts and data providers make different choices. Some include all receivables, others only trade receivables. Some subtract only inventory, others remove every non-cash current asset. Two sources can report different acid-test ratios for the same company and period. Before comparing figures, confirm the line items each one uses.
It undervalues fast-moving inventory. For a business that sells inventory within days, excluding it entirely can understate real liquidity.
It omits credit lines and cash flow. An undrawn revolving credit facility or strong recurring operating cash flow can cover obligations, but neither appears in the ratio.
Balance sheet dates can flatter. Because the ratio uses period-end balances, a company can temporarily improve it, for example by delaying purchases just before the reporting date.
FAQs
Is a higher or lower acid-test ratio better?
Higher is better up to a point. A ratio above 1.0 means a company can cover current liabilities from liquid assets, while one well below 1.0 signals dependence on selling inventory or raising cash. Beyond the level typical for its industry, a higher ratio can point to idle cash rather than extra safety.
Can the acid-test ratio be negative?
No. Quick assets and current liabilities are both zero or positive, so the lowest possible value is zero. A company with no cash, securities or receivables would have a ratio of 0.
Where do I find the numbers?
All inputs come from the current assets and current liabilities sections of a company's balance sheet, found in its annual and quarterly financial statements. The notes to the statements often break out receivables and short-term investments in more detail.
The Bottom Line
The acid-test ratio matters most to analysts, lenders and investors judging whether a company can meet near-term bills without selling inventory. A reading near or above 1.0 generally signals sound short-term health, though norms vary by industry and very high ratios can point to idle cash. Compare it with peers and with the company's own trend, and confirm which line items each source includes.
