Current Ratio vs Quick Ratio

The current ratio divides all current assets by current liabilities; the quick ratio does the same but strips out inventory and prepayments, counting only cash, marketable securities and receivables. Both test whether a company can meet its short-term bills, but the quick ratio is the stricter, more cautious measure because it assumes inventory cannot be turned into cash quickly.

Before you worry about a company’s long-term debt, it is worth asking a simpler question: can it pay the bills due in the next twelve months? Liquidity ratios answer that. They are blunt instruments, but they are fast, and they flag the kind of short-term stress that can sink an otherwise decent business.

Where this fits: both ratios test short-term resilience, part of Criterion 4, a sound balance sheet, in the Five Criteria framework. They build on how to read a balance sheet and sit beside the cash conversion cycle, which explains why some companies thrive below a ratio of 1.

What “Current” Means on the Balance Sheet

The balance sheet splits assets and liabilities into current and non-current. “Current” means due to be used or settled within one year.

• Current assets: cash, short-term investments, trade receivables (money owed by customers), inventory and prepaid expenses.
• Current liabilities: trade payables (money owed to suppliers), short-term borrowings, the current portion of long-term debt, accrued expenses and tax due.

Liquidity ratios compare the two. If current assets exceed current liabilities, the company has positive working capital and, on paper, enough short-term resources to meet short-term claims.

The Current Ratio

Current ratio = Current assets ÷ Current liabilities

A current ratio of 2 means the company has £2 of current assets for every £1 of current liabilities. The usual rule of thumb is that something in the 1.5 to 3 range is comfortable, though this varies enormously by industry.

The strength of the current ratio is that it is simple and captures everything short-term. Its weakness is that it treats all current assets as equally good at paying bills. They are not. Cash pays a supplier today; a warehouse full of unsold inventory does not.

The Quick Ratio (Acid Test)

The quick ratio, also called the acid-test ratio, fixes that weakness by removing the assets that cannot be relied on to convert to cash quickly.

Quick ratio = (Cash + Marketable securities + Receivables) ÷ Current liabilities

Or, equivalently:

Quick ratio = (Current assets − Inventory − Prepayments) ÷ Current liabilities

The quick ratio keeps only the “quick” assets: cash, things that are nearly cash, and money customers already owe and should pay soon. It drops inventory, because selling stock takes time and may require discounts, and prepayments, because you cannot pay a supplier with next year’s prepaid insurance.

Because it uses a smaller numerator over the same denominator, the quick ratio is always equal to or lower than the current ratio. The size of the gap between them tells you how much the company leans on inventory.

A Hypothetical Comparison

Imagine two companies, both with £100 million of current liabilities. Company R is a retailer with a lot of stock; Company S is a software firm with almost none. These are illustrative figures.

Current assets	Company R (retailer)	Company S (software)
Cash and securities	£20m	£90m
Receivables	£10m	£40m
Inventory	£110m	£0m
Prepayments	£10m	£10m
Total current assets	£150m	£140m
Current liabilities	£100m	£100m

Now the two ratios:

Ratio	Company R	Company S
Current ratio	1.5	1.4
Quick ratio	0.3	1.3

On the current ratio, the two look almost identical, and Company R even looks slightly safer. But the quick ratio tells a very different story. Strip out Company R’s £110 million of inventory and it has only £30 million of quick assets against £100 million of bills; a quick ratio of 0.3. If sales slowed and that stock sat unsold, Company R could struggle. Company S, by contrast, is awash with cash and receivables.

This is the whole point of using both. The current ratio flattered Company R; the quick ratio exposed how dependent it is on shifting inventory.

When a Ratio Below 1 Is Perfectly Safe

A ratio under 1 looks alarming, yet some of the best businesses run that way on purpose. The reason is the timing of cash, explained fully in the cash conversion cycle.

A supermarket takes cash from customers the moment they check out, but pays its suppliers 30 or 60 days later. It is effectively funded by its suppliers. Its current liabilities (payables) are large, its receivables tiny, so its current ratio can sit below 1 with no stress at all. The same is true of many subscription businesses that collect payment upfront.

So a low ratio is a question, not a verdict. Ask: does this company collect cash before it has to pay out? If yes, a sub-1 ratio is a sign of strength, not weakness. If no, it is a warning.

When a High Ratio Is a Problem

The opposite extreme also deserves scrutiny. A current ratio of 4 or 5 can mean one of several unglamorous things:

• Idle cash earning little, which could be reinvested, used to buy back shares or returned to owners. How management handles surplus cash is central to the hierarchy of capital allocation.
• Bloated inventory that is not selling, which may later be written down.
• Slow collections, with receivables piling up because customers are not paying.

Liquidity is safety, but too much of it is a drag on returns. A fortress balance sheet is good; a lazy one is not.

Reading the Two Ratios Together

Pattern	What it suggests
Current high, quick high	Strong liquidity; check it is not idle cash
Current high, quick low	Heavy reliance on inventory; watch stock turnover
Current low, quick low, slow cash cycle	Genuine short-term risk; read debt maturities
Current low, quick low, fast cash cycle	Often fine; supplier credit funds the business
Ratios falling year after year	A trend worth investigating, whatever the level

The trend matters as much as the level. A quick ratio drifting down over several years can be an early sign of trouble, even while it remains above 1. This kind of deterioration belongs on your list of red flags.

Limits of Liquidity Ratios

Both ratios are snapshots taken on the balance sheet date. A company can tidy its numbers right before the year end, a practice sometimes called “window dressing”. They also say nothing about profitability or long-term solvency.

For the real test of whether short-term obligations can be met, pair these ratios with:

• The cash flow statement, to see whether operations actually generate cash.
• The debt maturity table in the notes, which the guide to reading the notes covers, to see when borrowings fall due.
• Interest coverage, to check the company can service its debt from profit.

Liquidity ratios are a fast first screen. They tell you where to look harder, not whether to buy.

How This Fits the Five Criteria

Under Criterion 4, a sound balance sheet is not only about long-term debt. A business can carry little debt yet still hit a wall if it runs out of cash to pay this month’s suppliers. The quick ratio is the fastest check on that risk.

In practice, I treat these ratios as a screen: a quick ratio comfortably near or above 1, or a clearly favourable cash cycle that explains a lower figure, lets me move on. A low quick ratio with a slow cash cycle and chunky near-term debt is a reason to dig into the cash flow statement before going further. A truly great business rarely gives you sleepless nights over next month’s bills.

Frequently Asked Questions

What is a good current ratio?

A current ratio between roughly 1.5 and 3 is often considered healthy, meaning current assets comfortably cover current liabilities. But the ideal varies by industry. Retailers and restaurants often run below 1 safely because they collect cash fast and pay suppliers later, while manufacturers with slow inventory need more cover. Judge the ratio against peers and against the company’s own history.

Why is the quick ratio lower than the current ratio?

The quick ratio removes inventory and prepaid expenses from the numerator because they cannot reliably be turned into cash at short notice. Since it uses fewer assets over the same liabilities, it is always equal to or lower than the current ratio. The gap between the two tells you how much a company depends on selling inventory to meet its bills.

Can a company be safe with a current ratio below 1?

Yes, if it has a favourable cash conversion cycle. Businesses that take cash from customers immediately but pay suppliers weeks later, such as supermarkets and subscription firms, can operate below 1 without strain because supplier credit funds their operations. The ratio must be read alongside how quickly the business turns sales into cash.

Is a very high current ratio a good thing?

Not necessarily. A current ratio of 4 or 5 can mean the company is sitting on idle cash, holding too much inventory or failing to collect receivables efficiently. Excess liquidity earns little and can signal poor capital allocation. Strong is good; bloated is not.

Which is more important, the current ratio or the quick ratio?

For most purposes the quick ratio is the more revealing because it refuses to count inventory, which is the least dependable current asset. But the two work best together: the current ratio shows total short-term cover, and the quick ratio shows how much of that cover you could rely on in a hurry. Use both, then confirm with the cash flow statement.

Your Next Step

Calculate both ratios for one company you follow, then look at how they have moved over five years and compare them with a close competitor. Read the cash conversion cycle to understand why a low ratio can be safe, confirm the cash is real with the cash flow statement, and then assess the whole balance sheet with the Five Criteria Scorecard.

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About the author: Cameron Hayes is a senior investor relations and finance professional who has worked in IR at Nasdaq Copenhagen-listed companies including Nilfisk and Maersk Drilling. He holds an MSc from Copenhagen Business School and a BCom from the University of Ottawa, and founded Gingernomics to teach individual investors the Five Criteria framework. More about Gingernomics.

The content on Gingernomics is for educational and informational purposes only and does not constitute financial advice. Always do your own research and consult a licensed financial advisor before making any investment decisions. Past performance is not indicative of future results.