# Acid-Test Ratio: Equation, Examples, and What It Tells You

Published: 2026-02-27
Author: Warren Team
URL: https://www.heywarren.com/blog/acid-test-ratio-equation

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The acid-test ratio (also called the quick ratio) is a liquidity metric that measures a company's ability to meet its short-term obligations using only its most liquid assets — cash, [marketable securities](/blog/marketable-securities), and receivables — without relying on inventory or [prepaid expenses](/blog/prepaid-expenses). The name comes from the historic assayer's test: gold was tested with acid to determine its purity; similarly, the acid-test ratio strips away less-liquid assets to reveal the "pure" liquidity of a company. A ratio of 1.0x means the company can exactly cover all current liabilities with quick assets; below 1.0x signals potential short-term liquidity stress. It is a more conservative and often more informative measure than the current ratio.

## The Acid-Test Ratio Equation

> **Acid-Test Ratio = (Cash + Marketable Securities + Net Receivables) ÷ Current Liabilities**

![The acid-test ratio includes only the three most liquid current assets, explicitly excluding inventory and prepaid expenses.](data:image/svg+xml,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20viewBox%3D%220%200%20760%20211%22%20width%3D%22760%22%20height%3D%22211%22%20role%3D%22img%22%3E%3Ctitle%3EHierarchy%3C%2Ftitle%3E%3Crect%20width%3D%22100%25%22%20height%3D%22100%25%22%20fill%3D%22%23f8fafc%22%2F%3E%3Crect%20x%3D%22300%22%20y%3D%2220%22%20width%3D%22160%22%20height%3D%2258%22%20rx%3D%228%22%20fill%3D%22%232563eb%22%2F%3E%3Ctext%20x%3D%22380%22%20y%3D%2254%22%20text-anchor%3D%22middle%22%20font-family%3D%22system-ui%2C-apple-system%2Csans-serif%22%20font-size%3D%2214%22%20font-weight%3D%22700%22%20fill%3D%22white%22%3ECurrent%20Assets%3C%2Ftext%3E%3Cpath%20d%3D%22M%20380%2078%20L%20380%20105.5%20L%20110%20105.5%20L%20110%20133%22%20stroke%3D%22%23cbd5e1%22%20stroke-width%3D%222%22%20fill%3D%22none%22%2F%3E%3Crect%20x%3D%2230%22%20y%3D%22133%22%20width%3D%22160%22%20height%3D%2258%22%20rx%3D%228%22%20fill%3D%22white%22%20stroke%3D%22%230891b2%22%20stroke-width%3D%222%22%2F%3E%3Ctext%20x%3D%22110%22%20y%3D%22158%22%20text-anchor%3D%22middle%22%20font-family%3D%22system-ui%2C-apple-system%2Csans-serif%22%20font-size%3D%2213%22%20font-weight%3D%22600%22%20fill%3D%22%230f172a%22%3ECash%3C%2Ftext%3E%3Ctext%20x%3D%22110%22%20y%3D%22176%22%20text-anchor%3D%22middle%22%20font-family%3D%22system-ui%2C-apple-system%2Csans-serif%22%20font-size%3D%2210%22%20fill%3D%22%2364748b%22%3EIncluded%3C%2Ftext%3E%3Cpath%20d%3D%22M%20380%2078%20L%20380%20105.5%20L%20290%20105.5%20L%20290%20133%22%20stroke%3D%22%23cbd5e1%22%20stroke-width%3D%222%22%20fill%3D%22none%22%2F%3E%3Crect%20x%3D%22210%22%20y%3D%22133%22%20width%3D%22160%22%20height%3D%2258%22%20rx%3D%228%22%20fill%3D%22white%22%20stroke%3D%22%230891b2%22%20stroke-width%3D%222%22%2F%3E%3Ctext%20x%3D%22290%22%20y%3D%22158%22%20text-anchor%3D%22middle%22%20font-family%3D%22system-ui%2C-apple-system%2Csans-serif%22%20font-size%3D%2213%22%20font-weight%3D%22600%22%20fill%3D%22%230f172a%22%3EMarketable%20Securities%3C%2Ftext%3E%3Ctext%20x%3D%22290%22%20y%3D%22176%22%20text-anchor%3D%22middle%22%20font-family%3D%22system-ui%2C-apple-system%2Csans-serif%22%20font-size%3D%2210%22%20fill%3D%22%2364748b%22%3EIncluded%3C%2Ftext%3E%3Cpath%20d%3D%22M%20380%2078%20L%20380%20105.5%20L%20470%20105.5%20L%20470%20133%22%20stroke%3D%22%23cbd5e1%22%20stroke-width%3D%222%22%20fill%3D%22none%22%2F%3E%3Crect%20x%3D%22390%22%20y%3D%22133%22%20width%3D%22160%22%20height%3D%2258%22%20rx%3D%228%22%20fill%3D%22white%22%20stroke%3D%22%230891b2%22%20stroke-width%3D%222%22%2F%3E%3Ctext%20x%3D%22470%22%20y%3D%22158%22%20text-anchor%3D%22middle%22%20font-family%3D%22system-ui%2C-apple-system%2Csans-serif%22%20font-size%3D%2213%22%20font-weight%3D%22600%22%20fill%3D%22%230f172a%22%3ENet%20Receivables%3C%2Ftext%3E%3Ctext%20x%3D%22470%22%20y%3D%22176%22%20text-anchor%3D%22middle%22%20font-family%3D%22system-ui%2C-apple-system%2Csans-serif%22%20font-size%3D%2210%22%20fill%3D%22%2364748b%22%3EIncluded%3C%2Ftext%3E%3Cpath%20d%3D%22M%20380%2078%20L%20380%20105.5%20L%20650%20105.5%20L%20650%20133%22%20stroke%3D%22%23cbd5e1%22%20stroke-width%3D%222%22%20fill%3D%22none%22%2F%3E%3Crect%20x%3D%22570%22%20y%3D%22133%22%20width%3D%22160%22%20height%3D%2258%22%20rx%3D%228%22%20fill%3D%22white%22%20stroke%3D%22%230891b2%22%20stroke-width%3D%222%22%2F%3E%3Ctext%20x%3D%22650%22%20y%3D%22158%22%20text-anchor%3D%22middle%22%20font-family%3D%22system-ui%2C-apple-system%2Csans-serif%22%20font-size%3D%2213%22%20font-weight%3D%22600%22%20fill%3D%22%230f172a%22%3EInventory%3C%2Ftext%3E%3Ctext%20x%3D%22650%22%20y%3D%22176%22%20text-anchor%3D%22middle%22%20font-family%3D%22system-ui%2C-apple-system%2Csans-serif%22%20font-size%3D%2210%22%20fill%3D%22%2364748b%22%3EExcluded%3C%2Ftext%3E%3C%2Fsvg%3E)

*The acid-test ratio includes only the three most liquid current assets, explicitly excluding inventory and prepaid expenses.*

Or equivalently:

> **Acid-Test Ratio = (Current Assets − Inventory − Prepaid Expenses) ÷ Current Liabilities**

**Components**:

| Component | What to Include |
|---|---|
| Cash and cash equivalents | Checking, savings, money market, T-bills with <90-day maturity |
| Marketable securities | Stocks, bonds, other liquid securities held as short-term investments |
| Net receivables | [Accounts receivable](/blog/accounts-receivable) less allowance for doubtful accounts |
| Current liabilities | Accounts payable, accrued liabilities, short-term debt, current portion of long-term debt |

**Excluded from quick assets**:
- Inventory (may take time to sell; value uncertain)
- Prepaid expenses (cannot be converted to cash)
- Other current assets (vary in liquidity)

## Calculation Example

**Balance sheet data (condensed)**:

![The same balance sheet yields a 1.09x acid-test ratio versus a 1.91x current ratio — inventory accounts for most of the gap.](data:image/svg+xml,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20viewBox%3D%220%200%20800%20210%22%20width%3D%22800%22%20height%3D%22210%22%20role%3D%22img%22%3E%3Ctitle%3EComparison%3C%2Ftitle%3E%3Crect%20width%3D%22100%25%22%20height%3D%22100%25%22%20fill%3D%22%23f8fafc%22%2F%3E%3Ctext%20x%3D%22230%22%20y%3D%2257.5%22%20text-anchor%3D%22end%22%20font-family%3D%22system-ui%2C-apple-system%2Csans-serif%22%20font-size%3D%2214%22%20font-weight%3D%22600%22%20fill%3D%22%230f172a%22%3EAcid-Test%20Ratio%3C%2Ftext%3E%3Crect%20x%3D%22240%22%20y%3D%2225%22%20width%3D%22256.8062827225131%22%20height%3D%2255%22%20rx%3D%226%22%20fill%3D%22%232563eb%22%2F%3E%3Ctext%20x%3D%22508.8062827225131%22%20y%3D%2257.5%22%20font-family%3D%22system-ui%2C-apple-system%2Csans-serif%22%20font-size%3D%2214%22%20font-weight%3D%22700%22%20fill%3D%22%232563eb%22%3Ex1.09%3C%2Ftext%3E%3Ctext%20x%3D%22230%22%20y%3D%22152.5%22%20text-anchor%3D%22end%22%20font-family%3D%22system-ui%2C-apple-system%2Csans-serif%22%20font-size%3D%2214%22%20font-weight%3D%22600%22%20fill%3D%22%230f172a%22%3ECurrent%20Ratio%3C%2Ftext%3E%3Crect%20x%3D%22240%22%20y%3D%22120%22%20width%3D%22450%22%20height%3D%2255%22%20rx%3D%226%22%20fill%3D%22%237c3aed%22%2F%3E%3Ctext%20x%3D%22702%22%20y%3D%22152.5%22%20font-family%3D%22system-ui%2C-apple-system%2Csans-serif%22%20font-size%3D%2214%22%20font-weight%3D%22700%22%20fill%3D%22%237c3aed%22%3Ex1.91%3C%2Ftext%3E%3C%2Fsvg%3E)

*The same balance sheet yields a 1.09x acid-test ratio versus a 1.91x current ratio — inventory accounts for most of the gap.*

| Current Assets | Amount |
|---|---|
| Cash | $45,000,000 |
| Marketable securities | $15,000,000 |
| Accounts receivable (net) | $60,000,000 |
| Inventory | $85,000,000 |
| Prepaid expenses | $5,000,000 |
| **Total current assets** | **$210,000,000** |

| Current Liabilities | Amount |
|---|---|
| Accounts payable | $55,000,000 |
| Accrued liabilities | $30,000,000 |
| Short-term debt | $25,000,000 |
| **Total current liabilities** | **$110,000,000** |

**Acid-test ratio** = ($45M + $15M + $60M) / $110M = $120M / $110M = **1.09x**

**Current ratio** (for comparison) = $210M / $110M = **1.91x**

The current ratio looks much healthier (1.91x), but much of that is tied up in inventory ($85M) and prepaid expenses ($5M) — the acid-test reveals the more conservative, liquid picture.

## What the Acid-Test Ratio Tells You

| Ratio Range | Interpretation |
|---|---|
| > 1.5x | Strong liquidity; ample buffer to cover short-term obligations |
| 1.0x–1.5x | Adequate; can cover current liabilities if receivables are collected |
| 0.75x–1.0x | Watch carefully; depends on receivable collection speed |
| < 0.75x | Potential liquidity stress; may need additional financing or revolving credit |

**Industry context matters enormously**: A grocery retailer (Walmart, Kroger) typically has an acid-test ratio below 0.5x — they have almost no receivables, turn inventory rapidly, and pay suppliers slowly. Their business model creates negative working capital naturally. Conversely, a SaaS company or consulting firm with no inventory should have an acid-test ratio well above 1.0x.

## Acid-Test Ratio vs. Current Ratio

| Feature | Acid-Test (Quick) Ratio | Current Ratio |
|---|---|---|
| Formula | (Cash + Securities + Receivables) / CL | Current Assets / Current Liabilities |
| Inventory included? | No | Yes |
| Prepaid expenses included? | No | Yes |
| Conservatism | More conservative | Less conservative |
| Better for | Companies with slow-moving inventory | Inventory-light businesses |
| Typical benchmark | ≥ 1.0x | ≥ 1.5x–2.0x |

**When the two diverge significantly**: A large gap between current ratio and acid-test ratio indicates heavy reliance on inventory. If that inventory is difficult to liquidate quickly (custom goods, perishables, seasonal items), the acid-test ratio gives the more accurate picture of near-term liquidity.

## Limitations of the Acid-Test Ratio

**Receivables quality**: Accounts receivable may not all be collectible. If a company has significant bad debt exposure, even the acid-test ratio overstates liquidity.

**Static snapshot**: The ratio reflects balances on a single date (balance sheet date), which may not represent typical operating conditions. Companies can window-dress the ratio around quarter-end.

**No timing data**: Receivables may be due in 60–90 days while payables are due in 30 days — the ratio doesn't capture this timing mismatch.

**Ignores revolving credit**: Most companies have undrawn revolving credit facilities that provide liquidity beyond what the balance sheet shows. The acid-test ratio ignores this available liquidity buffer.

## Authoritative Sources

For deeper background and primary-source data on this topic, the following authoritative sources are useful starting points:

- [IRS](https://www.irs.gov/)
- [SEC](https://www.sec.gov/)

## Conclusion

The acid-test ratio equation strips the balance sheet to its most liquid components — cash, marketable securities, and receivables — to test whether a company can cover its current liabilities without selling inventory. It is a more conservative and often more revealing measure than the current ratio, especially for companies with significant or slow-moving inventory. Context is critical: compare acid-test ratios within industries rather than against a universal benchmark. For related financial analysis metrics, see our guides on [solvency ratio](/blog/solvency-ratio) and [profitability ratios in accounting](/blog/profitability-ratios-in-accounting).

Warren at [heywarren.com](https://heywarren.com) helps analysts, investors, and finance students calculate and interpret liquidity ratios, assess short-term financial health, and analyse balance sheet quality.

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## Related Reading

**More from Warren**:
- [Solvency Ratio: What It Is and How to Calculate It](/blog/solvency-ratio)
- [Profitability Ratios in Accounting: Margins, Returns, and What They Tell You](/blog/profitability-ratios-in-accounting)
- [Net Realizable Value: How to Calculate It and Why It Matters](/blog/net-realizable-value)

**Authoritative sources**:
- [FASB ASC 230 — Statement of Cash Flows](https://asc.fasb.org/230)
- [SEC — Financial Statement Analysis](https://www.sec.gov/investor/pubs/begfinstmtguide.htm)
- [CFA Institute — Financial Analysis](https://www.cfainstitute.org/en/membership/professional-development/refresher-readings/financial-analysis-techniques)