Liquidity ratios: current, quick and cash ratio explained

Liquidity ratios are the classic instrument for judging a company’s ability to pay from its balance sheet. Three of them do most of the work: they set the assets available at short notice against the liabilities falling due at short notice, and answer the question of whether the debts are covered.

This guide explains the cash, quick and current ratio with formula and interpretation, places related metrics such as working capital alongside them — and then sets out the limit that matters most: all three are snapshots taken on one date, and none of them tells you how your liquidity behaves over the coming weeks.

The three liquidity ratios

The three ratios differ in one respect only: how much of current assets they are willing to count as cover. Each step down the list adds a further, less liquid position.

Cash ratio (first-degree liquidity) counts only cash and bank balances. It shows what share of current liabilities could be settled immediately out of money already in hand.

Quick ratio (second-degree liquidity, also the acid-test ratio) adds short-term receivables — money that should arrive from open customer invoices. Inventory stays out.

Current ratio (third-degree liquidity) finally takes the whole of current assets, inventory included, as cover. It shows whether short-term assets exceed short-term debts overall.

Two conventions are worth knowing, because they cause more confusion than they should. The ratios are expressed either as a percentage or as a plain multiple — a current ratio of 150 per cent and one of 1.5 are the same number. And “first, second and third degree” is continental European usage; in English-language reporting the names cash, quick and current ratio are the norm. Nothing about the arithmetic changes.

As rough orientation, a quick ratio around 100 per cent and a current ratio comfortably above it are often quoted; for the cash ratio there is no generally accepted target at all. Treat these as first bearings rather than thresholds — they depend heavily on industry and business model, and a distributor, a plant engineer and a software firm have no business being measured against the same number.

Related metrics in the same family

Alongside the three ratios sit a few closely related figures drawing on the same balance-sheet positions.

• Working capital is the difference between current assets and current liabilities. Positive working capital means short-term assets exceed short-term debts — the absolute counterpart to the current ratio, which expresses the same relationship as a proportion.
• Net working capital requirement narrows this to the operating positions — receivables plus inventory less payables — and is the figure that actually moves when working capital management bites.
• Cash conversion cycle (DSO + DIO − DPO) puts a duration on the same story: how many days elapse between paying for inputs and collecting from customers.

Working capital deserves particular attention here, because it is where the balance-sheet view and the payment view part company. Capital tied up in receivables and inventory improves your ratios arithmetically, but it only becomes money when customers pay or stock sells. A ratio counts it at book value; your bank account does not.

A worked example

The following example shows all three ratios for a fictional reporting date. The figures are generic illustrative values, not real ones.

Which gives the three ratios:

Read at face value, this company covers about 30 per cent of its current liabilities out of cash on hand, nearly all of them once receivables are counted, and comfortably more across the whole of current assets. That looks solid — with one important reservation. Whether the receivables arrive on time and the stock actually sells is not something the ratio knows. A high current ratio resting on hard-to-shift inventory is worth less than it looks.

Where the ratios stop — and what comes next

Liquidity ratios share a structural weakness: they are reporting-date figures. They describe a single moment — the balance-sheet date — and say nothing about the sequence of the coming weeks. Two companies with an identical quick ratio can be in completely different positions if one collects its large receivables next week and the other in two months.

There is a second, subtler problem. Because the ratio is measured on one date, it can be improved on that date without anything real changing: delaying a supplier run past the cut-off, drawing a facility the day before, pulling a collection forward. None of that alters the company’s ability to pay in the weeks either side, but all of it moves the ratio. The figure is easiest to flatter exactly when it matters most.

Both problems have the same answer: look at the sequence rather than the snapshot. A 13-week cash forecast sets expected receipts and payments against the available balance for every single week, and makes the low point in your liquidity visible before you reach it. Where the ratio asks “is there enough on the reporting date?”, the forecast asks “is there enough in every week until then?” The underlying mechanics are covered in the guide to calculating cash flow.

The two views complement each other and are both building blocks of cash flow forecasting: the ratios give the structural picture on a date, the weekly plan gives the path. For actually steering solvency the weekly view is the decisive one — because a shortfall never happens “on average”, it happens in one specific week. Where the pattern is already visible, the guide to a cash flow shortage sets out the early-warning signals and the levers.

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