Liquidity ratios all ask the same question — can the company pay its short-term bills? — and they answer it with progressively tougher tests. The current ratio uses everything classed as a current asset. The quick ratio strips out inventory. The cash ratio keeps only cash and equivalents. This walkthrough computes all three from one balance sheet and shows what each number actually tells you.
What Liquidity Means and Why Three Ratios Exist
Liquidity is the ability to cover current liabilities — debts due within a year — using current assets. A liquid company can pay payroll, suppliers, and interest as those bills come due, regardless of whether the business is profitable on paper.
The reason there are three liquidity ratios is that not every current asset converts to cash equally fast. Cash itself is liquid by definition. A short-term receivable usually collects within 30–60 days. Inventory has to be sold first — and on bad terms, it may not sell at full value at all. The three ratios let you stress-test liquidity progressively: from "use everything" to "use only cash."
The Three Formulas
Current ratio = Current assets ÷ Current liabilities
The broadest test. A current ratio of 2.0 means current assets are twice current liabilities. A general benchmark is roughly 1.5–2.0, but it varies wildly by industry — a grocery chain runs lean, a manufacturer carries more inventory.
Quick ratio = (Current assets − Inventory − Prepaid expenses) ÷ Current liabilities
Also called the acid-test ratio. It strips out the items that take time or effort to convert to cash. Some texts write it as (Cash + Marketable securities + Accounts receivable) ÷ Current liabilities — same result, computed the other way. A quick ratio above 1.0 is generally considered comfortable.
Cash ratio = (Cash + Cash equivalents) ÷ Current liabilities
The strictest test. Could the company pay all its current liabilities today, using only what is in the bank and short-term marketable securities? A cash ratio of 0.5 or higher is conservative; many healthy companies operate well below that because cash sitting idle has an opportunity cost.
The Setup: One Company's Balance Sheet Snapshot
Take a retailer called Lakeside Goods. Year-end current items:
Current assets
- Cash and cash equivalents: $40,000
- Marketable securities: $20,000
- Accounts receivable: $60,000
- Inventory: $100,000
- Prepaid expenses: $10,000
- Total current assets: $230,000
Current liabilities
- Accounts payable: $70,000
- Short-term notes payable: $30,000
- Accrued expenses: $20,000
- Total current liabilities: $120,000
Computing the Three Ratios
Current ratio
Current ratio = $230,000 ÷ $120,000 = 1.92
Lakeside has $1.92 of current assets for every $1 of current liabilities. By the rough benchmark this is comfortable. But the current ratio includes the $100,000 of inventory, and inventory is not as good as cash for paying a bill on Friday. The quick ratio will tighten the test.
Quick ratio
Quick assets = Current assets − Inventory − Prepaid expenses = $230,000 − $100,000 − $10,000 = $120,000
Quick ratio = $120,000 ÷ $120,000 = 1.00
The quick ratio is exactly 1.00. That means if Lakeside could not sell a single unit of inventory and could not get any benefit from its prepaid expenses, the rest of its current assets would just cover the current liabilities. A meaningful drop from the 1.92 current ratio — and a sign that Lakeside is leaning heavily on inventory for its apparent strength.
Same result the other way: ($40,000 cash + $20,000 securities + $60,000 receivables) ÷ $120,000 = $120,000 ÷ $120,000 = 1.00.
Cash ratio
Cash + cash equivalents = $40,000. Most texts include marketable securities as cash equivalents, which is reasonable for short-term, highly liquid securities. Using that definition: $40,000 + $20,000 = $60,000.
Cash ratio = $60,000 ÷ $120,000 = 0.50
Lakeside has 50¢ in immediately-available cash for every $1 of current liabilities. That is conservative-but-not-overkill. The company could not pay everything due today out of pure cash, but combined with normal AR collections it would not struggle.
Reading the Three Together
The three ratios together tell a more useful story than any one of them alone.
| Ratio | Value | Benchmark | Read |
|---|---|---|---|
| Current ratio | 1.92 | 1.5–2.0 | Healthy on the broad view |
| Quick ratio | 1.00 | ≥ 1.0 | Tight once inventory is excluded |
| Cash ratio | 0.50 | varies | Conservative cash cushion |
The drop from 1.92 to 1.00 between the current and quick ratios is the inventory story. Lakeside holds a lot of inventory relative to its other current assets. If sales slow and inventory turns more slowly, the company's apparent liquidity would deteriorate fast. A skeptical analyst would look next at inventory turnover, days sales outstanding, and any seasonal cycle that could reverse this picture.
Trends matter more than a single snapshot. The same Lakeside one year earlier might have shown a 2.40 current ratio and a 1.30 quick ratio. A slide from 1.30 to 1.00 in the quick ratio is the kind of change worth a question on a final exam — and the kind a creditor would notice in real life.
Common Mistakes to Avoid
Forgetting prepaid expenses in the quick ratio. They are current assets but they cannot be liquidated to pay a bill, so they come out alongside inventory. Some textbooks include them in the quick ratio numerator; check what your course expects.
Confusing liquidity with solvency. Liquidity is short-term; solvency is the ability to meet all obligations long-term. A company can be solvent (assets exceed liabilities) but illiquid (no cash for this Friday's payroll). The two ideas use different ratios.
Treating a single ratio as a verdict. A current ratio of 3.0 is not automatically good — it can mean inventory is piling up or cash is sitting idle. A current ratio of 1.1 is not automatically bad — it can be normal for a high-turnover business. Industry context and trend direction matter more than the absolute number.
Getting Help
Liquidity ratios pair naturally with profitability ratios for a fuller financial-health picture. For the profitability side — gross margin, ROA, ROE, ROI — see profitability ratios explained. For where the underlying balance sheet numbers come from, see recording journal entries.
Conclusion
Liquidity ratios are three progressively strict tests of whether a company can pay its short-term bills. The current ratio uses everything classed as a current asset, the quick ratio excludes inventory and prepaid expenses, and the cash ratio keeps only cash and equivalents. Compute all three, read them together, and compare to the same company a year earlier — the three ratios in motion say more about liquidity than any single value at a single moment.
