The Current Ratio in One Line
The current ratio is current assets divided by current liabilities.
Current ratio = current assets ÷ current liabilities
If a business has £240,000 of current assets and £160,000 of current liabilities, the current ratio is 1.5. For every £1 the business owes in the next twelve months, it has £1.50 of things that should turn into cash in the next twelve months.
That is the whole calculation. It takes about ten seconds once you have a balance sheet in front of you, which is exactly why it gets quoted so freely and understood so rarely. The number itself is nearly meaningless. What it is made of is the interesting part, and that is where the rest of this guide goes.
How to Calculate It From a UK Balance Sheet
Most explanations of the current ratio online are written for US financial statements, where the balance sheet says "total current assets" and "total current liabilities" and you divide one by the other. A UK statutory balance sheet does not look like that.
Companies Act accounts follow the formats set out in the Companies Act 2006 regulations. In Balance Sheet Format 1, the headings run in this order:
| Item | Heading |
|---|---|
| A | Called up share capital not paid |
| B | Fixed assets |
| C | Current assets |
| D | Prepayments and accrued income |
| E | Creditors: amounts falling due within one year |
| F | Net current assets (liabilities) |
| G | Total assets less current liabilities |
| H | Creditors: amounts falling due after more than one year |
Three things follow from that, and they trip people up constantly.
Your current liabilities are called creditors. There is no line in UK accounts labelled "current liabilities". The figure you want is item E, "creditors: amounts falling due within one year". If you are reading accounts filed at Companies House, that is your denominator.
Prepayments sit outside the current assets heading. Item D is its own heading, after current assets, not inside them. It is still a short-term asset and it is still part of the working capital calculation, but if you take heading C on its own as your numerator you will understate the ratio. Prepayments for a small company can easily be £10,000 to £20,000 of insurance, software subscriptions and rent paid in advance. On a business with £160,000 of creditors, missing them moves the ratio by roughly 0.1.
The subtotal is already there. Item F, net current assets or liabilities, is C plus D minus E. That is working capital in pounds, printed on the face of every set of UK company accounts. The current ratio is the same relationship expressed as a multiple instead of a difference. If net current assets is positive, the current ratio is above 1. If it is negative, the ratio is below 1. You cannot have one without the other.
So the honest UK version of the formula is:
Current ratio = (current assets + prepayments and accrued income) ÷ creditors falling due within one year
A Worked Example
Redwood Joinery Ltd is a fitted furniture company in Hertfordshire with a 31 March year end. Here is the short-term half of its balance sheet.
| £ | |
|---|---|
| Stocks (timber, ironmongery, work in progress) | 62,000 |
| Trade debtors | 118,000 |
| Cash at bank | 19,000 |
| Current assets (C) | 199,000 |
| Prepayments and accrued income (D) | 11,000 |
| Trade creditors | 74,000 |
| VAT owed to HMRC | 28,000 |
| PAYE and National Insurance | 9,000 |
| Corporation tax | 21,000 |
| Bank overdraft | 12,000 |
| Creditors falling due within one year (E) | 144,000 |
Current ratio = (199,000 + 11,000) ÷ 144,000 = 1.46
Net current assets = 210,000 − 144,000 = £66,000
Two numbers, same message, different units. Redwood has £1.46 of short-term assets for every £1 of short-term debt, and £66,000 of headroom in absolute terms.
Now look at what that 1.46 is actually made of. £118,000 of it is money other people owe Redwood, and £62,000 of it is timber and half-built kitchens. Only £19,000 is cash. If Redwood's two largest customers both went quiet for six weeks, the 1.46 would not help anyone. That is the limitation of the current ratio in a sentence: it treats a pound of slow-moving stock as if it were a pound in the bank.
What Is a Good Current Ratio?
You will read almost everywhere that a good current ratio is 2:1, that below 1 is a warning sign, and that above 3 means you are hoarding cash. Two of those three are worth very little.
The 2:1 rule is an inheritance from American bank lending in the 1920s, when balance sheets were simpler, credit checking barely existed and a lender wanted enough cushion to be repaid if half the borrower's assets turned out to be worthless. It got repeated into textbooks and it has been repeated ever since. It was a crude lending safeguard, not a measure of a healthy business, and it was never calibrated to any particular industry.
Our honest answer, after looking at a lot of small company balance sheets, is this. A good current ratio is one that makes sense for how your business collects and pays. The number you should compare yourself against is your own figure twelve months ago and the typical figure in your sector. A national average is not a target.
What the ratio genuinely tells you at the extremes:
- Below 1 and falling, in a business that sells on credit. Worth acting on. You are funding customers with money you owe suppliers, and you have no slack.
- Below 1 in a business that takes cash at the point of sale. Usually normal. See the next section.
- Above 3 with most of the assets in debtors or stock. Usually a symptom, not a strength. Something is not converting.
- Above 3 with most of the assets in cash. Fine, and possibly a missed opportunity. Cash sitting in a current account is losing value to inflation, and the tax planning conversation about what to do with it is worth having.
Two Real UK Companies, at 0.59 and 3.99
This is the clearest way we know to kill the 2:1 rule.
Tesco plc reported current assets of £8,483 million and current liabilities of £14,329 million in its 2026 annual report. Current ratio: 0.59. On the textbook reading, one of the largest retailers in Britain is in serious liquidity trouble.
Persimmon plc reported current assets of £4,864 million and current liabilities of £1,218 million for 2025. Current ratio: 3.99. On the textbook reading, a housebuilder is sitting on four times the cushion it needs.
Neither reading is right, and the reason is the same in both cases: the businesses convert at completely different speeds.
Tesco sells for cash. A tin of beans is paid for at the till the moment it leaves the shelf, and the supplier who provided it is paid weeks later. Money arrives before it leaves. A supermarket with a current ratio of 2 would be a supermarket doing something strange with its money.
Persimmon's current assets are 92% inventory, and that inventory is land and part-built houses. It takes years, not days, to turn into cash. A housebuilder needs a ratio near 4 because most of the 4 is not liquid at all.
Same formula, opposite answers, both companies working exactly as intended. If you take one thing from this guide, take this: the current ratio is a measure of speed, and it only means something when you already know how fast the business in question turns stock and invoices into money.
The Quick Ratio, or Acid Test
The quick ratio is the current ratio with stock taken out.
Quick ratio = (current assets − stock) ÷ current liabilities
It is also called the acid test ratio, and the two terms mean exactly the same thing. Some versions also strip out prepayments, on the logic that you cannot pay a supplier with next year's insurance cover. We think that is the better version for a small business, because prepayments genuinely never become cash. They become an expense.
For Redwood Joinery, stripping out £62,000 of stock and £11,000 of prepayments:
Quick ratio = (210,000 − 62,000 − 11,000) ÷ 144,000 = 0.95
That is a much more honest picture than 1.46. Redwood's ability to pay its bills in the next quarter rests almost entirely on collecting £118,000 of invoices, and every week of slippage in collections is a week of pressure. A 1.46 current ratio and a 0.95 quick ratio is a business whose finance function is really a credit control function.
The gap between the two ratios is the number to watch. A wide gap means stock. If the gap widens over three or four periods, stock is building faster than it is selling, and that is worth investigating long before it shows up in profit.
Current Ratio vs Quick Ratio vs Working Capital
| What it is | Units | Best used for | |
|---|---|---|---|
| Working capital | Current assets minus current liabilities | £ | Seeing the size of the cushion in money you can picture |
| Current ratio | Current assets ÷ current liabilities | A multiple | Comparing to your own history or to sector peers |
| Quick ratio | The same, without stock | A multiple | Businesses carrying stock, and any short-term stress test |
Use working capital when you are talking to an owner, because £66,000 means something to a human being and 1.46 does not. Use the ratios when you are comparing across time or across companies, because a multiple strips out size.
Five Things That Quietly Distort the Number
The current ratio is a photograph taken on one day. In the UK, that day is your accounting reference date, and you chose it. Here is what we see moving the number without anything real changing.
1. Which VAT stagger group you are in. Suppose two identical businesses both have a 31 March year end and both owe HMRC about £9,000 of VAT a month. One is in the stagger group whose quarters end in March, so at the balance sheet date it is carrying a full quarter, roughly £27,000, in creditors. The other is in the group whose quarters end in February, so at 31 March it is carrying one month, roughly £9,000. On £144,000 of other creditors, that is a current ratio of 1.35 versus 1.46, from a stagger group chosen years ago by whoever did the registration. It is cosmetic and it is also real enough that a credit agency scoring your filed accounts will see it.
2. Deferred income. If you invoice annually in advance, the unearned portion sits in creditors as deferred income. It is a liability that will never be settled in cash. It will be settled by doing the work. A software or subscription business with a great cash position can show a current ratio below 1 for exactly the reason it is doing well: it has collected a year of revenue up front. Anyone reading that ratio without adjusting for deferred income has the business precisely backwards.
3. Directors' loan accounts, in both directions. An overdrawn director's loan account sits in debtors and inflates the ratio with money that may never come back, and that carries a section 455 tax charge if it is not cleared. A credit balance sits in creditors and deflates the ratio with money no director is realistically going to demand. Lenders know this and will often ask for the loan to be formally subordinated before they take the balance sheet seriously.
4. Refinancing an overdraft. An overdraft is repayable on demand, so it is a current liability. Move that £12,000 overdraft onto a five-year loan and it becomes a creditor falling due after more than one year. Redwood's ratio jumps from 1.46 to 1.59 overnight. The business owes exactly the same money to exactly the same bank. This is the single easiest way to improve a current ratio, it is entirely legitimate, and it improves nothing about the business.
5. Assets that are not really assets. A £14,000 debtor from a customer who stopped answering the phone in January is not a current asset, whatever the ledger says. Nor is obsolete stock. Both sit in the numerator at full value until someone writes them off, and writing them off is the one balance sheet action that makes the ratio worse and the accounts more truthful at the same time.
The Ratio Quietly Rewards Being Slow to Pay
Here is something rarely said out loud. You can improve your current ratio by paying your suppliers later. Stretching trade creditors does not change the numerator, but it does not change the denominator either, because the money is still owed. Paying suppliers on time, by contrast, moves cash out of current assets and reduces creditors by the same amount, which pushes a ratio above 1 slightly higher and a ratio below 1 slightly lower.
So the arithmetic is close to neutral, but the behaviour it encourages is not. In a system where everyone is watching short-term cushions, the rational move for any individual business is to hold onto cash and let payment terms drift. Multiply that across the economy and you get where the UK actually is. Government research published in 2025 found businesses are owed an estimated £26 billion in late payments at any one time, that late payment costs the economy nearly £11 billion a year, and that around 14,000 businesses close each year because of it, roughly 38 a day.
Our view is that the current ratio is a defensive metric in a market with a late payment problem, and defensive metrics have a habit of making the problem worse. It tells you how much cushion you have. It says nothing about whether the cushion exists because you are well run or because you are the one paying late. If you are going to track this number, track debtor days alongside it, and be honest about which side of that £26 billion you are on.
How to Improve It, Without Kidding Yourself
Things that improve the ratio and the business:
- Collect faster. Invoice on the day the work finishes, not at month end. Shorten terms on new customers rather than existing ones. Chase at day one past due, not day thirty.
- Turn stock over faster. Discount slow lines. The cash from a reluctant sale is worth more than the margin on a sale that never happens.
- Retain profit rather than distributing it. Retained earnings that stay in the business as cash are the cleanest way to lift a ratio.
- Write off what is dead. It makes the ratio worse and makes it true.
Things that improve the ratio and nothing else:
- Refinancing short-term debt into long-term debt.
- Delaying supplier payments over the year end.
- Chasing customers hard in the last fortnight of the accounting period and easing off in the first fortnight of the next one.
The second list is what people mean by window dressing. None of it is illegal, all of it is visible to anyone who compares two consecutive balance sheets, and an experienced lender has seen every version of it.
What Lenders and Credit Agencies Actually Do With It
For a UK small company, the current ratio matters mostly because of who can calculate it without asking you.
Small companies currently file abridged or filleted accounts at Companies House. No profit and loss account, no turnover, no profit figure. What they do file is a balance sheet, which means the current ratio is one of the very few real financial metrics a credit reference agency, a supplier running a check or a prospective customer can compute about your business. It carries far more weight in UK credit scoring than it deserves on its own merits, purely because there is so little else on the public record.
That is changing. Under the Economic Crime and Corporate Transparency Act 2023, small companies and micro-entities will have to file a profit and loss account, and abridged accounts are being abolished. Companies House confirmed in 2026 that the change now applies to accounts filed on or after 1 April 2028, delayed from the original 1 April 2027 date. When it lands, outsiders will finally be able to see turnover and profit, and the current ratio will stop carrying the whole weight of the public credit assessment.
Until then, if you have a 31 March year end, the balance sheet you file is the main thing the outside world knows about your finances for the following year. It is worth a conversation with your accountant before the year end rather than after it, which is the opposite of when most people have it.
Common Mistakes We See
- Using the "current assets" subtotal and forgetting prepayments. Understates the ratio on every UK statutory balance sheet.
- Including the full bank loan in current liabilities. Only the portion due within twelve months belongs there.
- Comparing to a different industry. A 1.2 in construction and a 1.2 in consultancy are not the same fact.
- Treating one reading as a trend. Three periods of the same number tell you something. One tells you almost nothing.
- Forgetting the ratio moves when the business grows. Fast growth usually pushes the ratio down, because debtors and stock rise before the cash arrives. A falling ratio in a growing business is normal up to a point and dangerous past it. Knowing where that point is for your business is the actual skill.
How IAK Can Help
We work with limited companies, small businesses, construction companies and property developers across North London and Hertfordshire, and the current ratio comes up in two situations. Either a lender has asked for it, or an owner has read something and wants to know whether their number is bad.
Usually the useful answer is not the ratio at all. It is what the ratio is made of, whether the debtors in it are collectable, whether the stock in it is moving, and what the number did over the last three years rather than what it did on one day. That is a short piece of work and it tends to surface things a set of statutory accounts never will.
If you want the number watched monthly rather than annually, that is what management reporting is for. If your balance sheet is about to be filed and you would rather understand it first, get in touch, or read more about our accounting and bookkeeping services.
Sources
- The Large and Medium-sized Companies and Groups (Accounts and Reports) Regulations 2008, Schedule 1, legislation.gov.uk, for Balance Sheet Format 1 and the exact headings, including prepayments and accrued income sitting outside current assets and the net current assets (liabilities) subtotal.
- Tesco PLC Annual Report and Financial Statements 2026, for current assets of £8,483m and current liabilities of £14,329m.
- Persimmon plc balance sheet data, Stock Analysis, for current assets of £4,864m, current liabilities of £1,218m and inventories of £4,492m for the year ended 31 December 2025.
- Late Payments Research: estimating the total economic impact, Department for Business and Trade and the Office of the Small Business Commissioner, for the £26 billion owed at any one time, the £11 billion annual cost to the economy and the 14,000 business closures a year.
- Companies House to bring in changes to accounts filing from April 2028, GOV.UK, for small companies and micro-entities being required to file a profit and loss account, the abolition of abridged accounts and the revised 1 April 2028 start date.
- VAT Returns: deadlines and accounting periods, GOV.UK, for quarterly VAT accounting periods and payment deadlines.