The quick ratio is current assets minus inventory, divided by current liabilities — or, in its stricter build-up form, cash plus marketable securities plus accounts receivable, divided by current liabilities. It answers one question: could this company pay every bill due within the next year without selling a single unit of inventory? A result of 1.0 means one dollar of near-cash assets for every dollar of current liabilities.
Accountants also call it the acid-test ratio, after the old assay trick of touching acid to a metal: only real gold passes. The quick ratio applies the same skepticism to a balance sheet. It strips out the current assets that take real work to convert into cash and asks what is left to cover what is due.
You will meet the formula in two shapes, and they are not always equal. Start with the version most textbooks lead with.
Quick ratio = (Current assets − Inventory) ÷ Current liabilities
Current assets — Everything the company expects to turn into cash within one year — the top section of the balance sheet
Inventory — Goods held for sale, including raw materials and work in process, at their balance-sheet value
Current liabilities — Everything due within one year — accounts payable, accrued wages, taxes payable, and short-term debt
Quick ratio = (Cash + Marketable securities + Accounts receivable) ÷ Current liabilities
Cash — Cash on hand plus cash equivalents such as money-market funds
Marketable securities — Short-term investments that can be sold at a quoted market price within days
Accounts receivable — Amounts customers owe on invoices, net of the allowance for doubtful accounts
Current liabilities — Same denominator as the subtraction form — everything due within one year
The subtraction form removes only inventory, so anything else sitting in current assets stays in the numerator. The build-up form adds up only the three most liquid lines, so anything else is left out. The two match only when inventory is the sole non-quick current asset.
Most real balance sheets break that condition, because they carry prepaid expenses — insurance or rent paid in advance. A prepaid is a current asset, but you can never pay a supplier with it: it converts into a used-up service, not into cash. The subtraction form keeps prepaids in the numerator; the build-up form drops them. That makes the build-up form the stricter of the two, and the honest habit is to say which form you used. On an exam, use the form your textbook defines; in the worked example below you will see exactly how far apart the two can land on the same balance sheet.
Inventory is usually the slowest current asset to convert into cash. Every other quick asset is either cash already, sellable at a quoted price in days, or an invoice with a named debtor and a due date. Inventory has none of that. It needs a willing buyer, at full price, on your timeline — and a company scrambling to pay bills rarely gets all three. Forced sales happen at a discount, and some inventory (seasonal stock, spare parts, half-finished goods) may not sell at all.
That is the acid-test idea: assume the worst case for inventory, which is that it converts to nothing in time, and see whether the company still covers its current liabilities. If the quick ratio holds up under that assumption, short-term solvency does not depend on the sales floor having a good month.
Marlowe Outdoor Supply ends its fiscal year with cash of $38,200, marketable securities of $12,600, accounts receivable of $57,900, inventory of $84,300, and prepaid insurance of $9,700. Total current assets are $202,700. Current liabilities are $91,400.
| Step | Calculation | Result |
|---|---|---|
| Quick assets, build-up form | $38,200 + $12,600 + $57,900 | $108,700 |
| Quick ratio, build-up form | $108,700 ÷ $91,400 | 1.19 |
| Quick assets, subtraction form | $202,700 − $84,300 | $118,400 |
| Quick ratio, subtraction form | $118,400 ÷ $91,400 | 1.30 |
| Current ratio, for contrast | $202,700 ÷ $91,400 | 2.22 |
Under the build-up form, Marlowe's quick ratio is 1.19: the company holds $1.19 of cash, securities, and receivables for every dollar due this year. Under the subtraction form it is 1.30, because the $9,700 of prepaid insurance stays in the numerator. The wedge between the forms is exactly that prepaid balance divided by current liabilities. Either way, Marlowe passes the acid test — it could pay its bills even if the $84,300 of inventory never sold.
The current ratio divides all current assets by current liabilities, so it counts inventory and prepaids at full value. The quick ratio is the same comparison with the slow assets removed. For Marlowe, the two tell a consistent story: 2.22 current, 1.19 to 1.30 quick — comfortable on both tests.
The gap matters when inventory dominates the balance sheet. Picture a furniture retailer with current assets of $148,000, of which $103,600 is inventory and prepaids, against current liabilities of $74,000. Its current ratio is a healthy-looking 2.00. But its quick assets are only $44,400, so its quick ratio is 0.60 — sixty cents of near-cash for every dollar due. If furniture sales slow for a quarter, the bills do not. Whenever a firm looks liquid on the current ratio, check the quick ratio before believing it; when the two disagree sharply, inventory is doing the talking.
Assuming the two forms give the same answer. They differ by prepaid expenses (and any other non-quick, non-inventory current asset) divided by current liabilities. If a problem lists prepaids and your answer does not match the key, you probably used the other form. State which form you used — graders reward it.
Treating 1.0 as a universal pass mark. A grocery chain can run a quick ratio well below 1.0 for years, because it sells for cash daily and pays suppliers on 30-day terms. A consulting firm with lumpy billings may need much more than 1.0. Compare a company to its industry and to its own trend, not to a single cutoff.
Taking receivables at face value. The quick ratio assumes receivables convert to cash on schedule. A numerator stuffed with invoices to customers who pay in 120 days — or may not pay at all — overstates liquidity. If receivables are aging, the quick ratio is only as honest as the allowance for doubtful accounts behind it.
The quick ratio asks whether a company could pay every current liability without selling inventory. Compute it as current assets minus inventory over current liabilities, or as cash plus securities plus receivables over current liabilities — and when the two forms disagree, the difference is prepaid expenses.
A common benchmark is 1.0 — one dollar of quick assets per dollar of current liabilities — but the right level depends on the industry. Businesses that sell for cash daily, like grocers and restaurants, operate safely below 1.0. Firms with slow, uncertain collections need a cushion above it. Compare against industry peers and the company's own history.
Yes. Quick ratio and acid-test ratio are two names for the same measure. The acid-test name comes from the old assay method for gold: a harsh test that only the genuine article passes.
Use the form your textbook or professor defines. If the problem gives you total current assets and inventory, the subtraction form is the natural fit; if it lists cash, securities, and receivables separately, build up from those. When prepaid expenses appear, the two forms give different answers, so name the form you used.
A receivable is a legal claim on a specific customer with an invoice and a due date — it converts to cash on a schedule. Inventory converts only if a buyer shows up and pays full price, which is exactly what a cash-strapped company cannot count on. The quick ratio keeps the claim and drops the hope.
It can. A quick ratio far above the industry norm — say 3.0 or more — often means cash and securities are sitting idle instead of being invested in the business. Liquidity is safety, but past a point it is unused capacity.
By the FinanceBrain Team · Last verified July 11, 2026 · How we produce and verify articles