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Cash

Cash flow is not profit

Accrual profit and cash movement are two different measurements. This guide explains the working capital cycle, why growth consumes cash, how to calculate the cash conversion cycle from your own accounts, and the early warning signs that appear before the bank balance does.

Last reviewed 18 min

Two different questions, two different answers

A set of accounts answers two questions that owners often treat as one. The profit and loss account answers: over this period, did the value of what we delivered exceed the cost of delivering it? The cash flow answers a blunter question: over this period, did more money arrive in the bank than left it? Those two answers are produced from the same underlying transactions, and they routinely disagree, sometimes by very large amounts and for months at a time.

The disagreement is not an accounting error. It is the deliberate consequence of the accrual basis, which records revenue when it is earned and cost when it is incurred, rather than when money moves. Accrual accounting exists because it gives a truer picture of performance in a period. A business that delivered a large order in December has earned that revenue in December, even if the customer pays in March. Matching the cost of that order to the same December revenue tells you whether the work was worth doing. Cash accounting would tell you nothing in December and everything in March, which describes your bank statement but not your business.

The cost of that truer picture is that profit stops being a statement about money. It becomes a statement about earning. A business can be profitable on every single order it takes and still fail, because failure is not caused by unprofitable trading alone. It is caused by running out of money on a particular day, when a particular payment is due, with nothing left to draw on. Profit does not pay salaries. Cleared funds pay salaries.

This is the single most common way a business that was working dies. Not a collapse in demand and not a pricing mistake, but a gradual, invisible drift where the profit is real, the order book is growing, every month looks better than the last, and the cash position quietly deteriorates until a payroll run cannot be met. The owner is usually surprised, because the management accounts were good right up to the end. They were measuring the wrong thing.

Where profit and cash separate

There are only a handful of places where the two measurements diverge, and each one is worth naming, because each is something you can actually see and manage. Once you can point at the four or five items causing the gap in your own accounts, the mystery goes away.

Notice the pattern. Almost every item on that list either turns cash into something that is not cash, or defers a cash movement to a date you did not choose. The profit figure is silent on all of it. That is not a flaw in the profit figure; it is simply outside its job.

  • Receivables. Revenue is recorded when you invoice. The money arrives when the customer pays. Every unpaid invoice is profit you have recognised and cash you do not have.
  • Inventory. Buying stock is not an expense. It converts cash into an asset. The cost only reaches the profit and loss account when the item is sold. Stock that does not move is cash that has been parked, and the accounts will not flag it as a cost.
  • Payables. Costs are recorded when incurred, but the cash leaves when you pay the supplier. Supplier credit is the one line that works in your favour, and it is the one businesses most often erode without noticing.
  • Capital expenditure. Buying a vehicle or a machine takes the full cash out on day one, but the profit and loss account only sees depreciation spread across several years. A heavy year of investment can be invisible in the profit figure.
  • Loan principal. Interest is an expense; the capital repayment is not. It leaves the bank every month and never appears in profit.
  • Tax and VAT. Amounts you have collected or accrued and not yet paid look like cash you hold. They are not yours, and the payment date is fixed by someone else.
  • Owner drawings and dividends. Money out, no effect on profit.
  • Prepayments and deposits. Rent paid a year in advance, or a deposit placed with a supplier, is cash gone and expense deferred.

A worked month, illustrative

Take a small trading business, invented here purely to make the arithmetic visible. In March it wins and delivers an order worth 100,000 SAR. The goods cost 65,000 SAR, bought from a supplier in February on 60-day terms. The customer is a large corporate buyer on 90-day terms.

The March profit and loss account shows revenue of 100,000 SAR, cost of sales of 65,000 SAR and gross profit of 35,000 SAR. That is correct in every respect. It is also the best month the business has had.

Now follow the money. The supplier invoice dated February falls due in April, so 65,000 SAR leaves the bank in April. The customer, on 90-day terms from a March invoice, pays in June, and in practice a few days later than that. Between April and June the business is 65,000 SAR out of pocket on its most profitable order of the year. If it wins a second identical order in April, and a third in May, the profit and loss account will show a business going from strength to strength while the bank balance falls by 65,000 SAR every month. Nothing has gone wrong. This is what success looks like from the bank account when the cycle is unfunded.

The gap here is roughly two months of the cost of every order, carried continuously. The business does not need a better product or a higher margin to fix it. It needs either faster collection, longer supplier terms, or funding to bridge the gap. Those are the only three answers, and the rest of this guide is largely about choosing between them.

The working capital cycle

The pattern in that example has a name. The working capital cycle is the loop cash makes through the business: cash buys inventory, inventory is sold and becomes a receivable, the receivable is collected and becomes cash again. Supplier credit funds part of the loop, because you hold the goods for a while before paying for them. Every business has this cycle; the differences are in how long each stage takes and who is funding it.

Two things follow from the shape of the loop. First, the longer the loop, the more cash is standing still inside the business at any moment. That cash is not lost; it is committed. It is sitting in the warehouse and in the ageing report. Second, the amount committed scales with volume. Run twice as much revenue through the same loop, at the same speed, and roughly twice as much cash sits inside it. This is the mechanism that turns growth into a cash problem, and it is arithmetic, not bad management.

Different businesses sit at very different points. A restaurant collects at the point of sale, holds a few days of food and pays suppliers on terms, so its cycle can be negative: it is funded by its suppliers and holds cash. A contractor who buys materials up front, works for three months and then invoices on completion with 60-day terms is funding a cycle measured in months. The same profit margin means something completely different in those two businesses, because one is generating cash as it grows and the other is consuming it.

Why a growing business consumes cash

This is the part that surprises owners, so it is worth stating directly: growth is a use of cash, and fast growth in a business with a long cycle is one of the largest uses of cash it will ever face. New sales require stock bought before the sale and staff paid before collection. The receivable created by the sale sits unpaid for the length of your terms. Meanwhile the profit on those sales arrives later and only in the proportion of your net margin, which is a fraction of the revenue, whereas the working capital requirement is a proportion of the whole revenue.

That asymmetry is the heart of it. If your net margin is 10 percent and your working capital requirement is 25 percent of revenue, every extra 100 of revenue brings 10 of profit and demands 25 of cash. The faster you grow, the further behind the cash falls, and the profit and loss account reports the whole process as an improvement. A business can grow itself out of existence while every single order it takes is profitable.

The practical implication is that growth needs to be funded deliberately, from retained profit, from an injection, from a facility sized against the receivables and inventory it creates, or from a shortened cycle. Growth that is not funded from one of those is being funded by stretching creditors and by the float in the bank account, which works until the month it does not.

The cash conversion cycle, in plain terms

You can measure the length of your own loop with three numbers, all of which can be produced from your accounts. They are usually called DSO, DIO and DPO, and they translate balance sheet figures into days, which is the unit owners actually think in.

Use revenue for DSO and cost of sales for DIO and DPO. Receivables carry your selling price, so they belong against revenue; inventory and payables carry cost, so they belong against cost of sales. Mixing the two is the most common error in this calculation and it makes inventory look faster than it is. Use 365 days for an annual figure, or the days in the period with the period figure annualised, but be consistent from month to month, because the trend matters more than the absolute number.

A positive cycle means you are funding the gap. A negative cycle means your suppliers and customers are funding you, which is the position supermarkets and many subscription businesses occupy. Neither is good or bad in itself; what matters is knowing the number, knowing which direction it is moving, and knowing what a day is worth in cash.

  • DSO, days sales outstanding: trade receivables divided by revenue, multiplied by 365. It answers: on average, how many days after invoicing do we get paid?
  • DIO, days inventory outstanding: inventory divided by cost of sales, multiplied by 365. It answers: on average, how many days does an item sit in stock before it is sold?
  • DPO, days payable outstanding: trade payables divided by cost of sales, multiplied by 365. It answers: on average, how many days after receiving goods do we pay for them?
  • The cash conversion cycle is DSO plus DIO minus DPO. It is the number of days between paying for something and being paid for it.

The cycle, worked through

Take an illustrative distributor with annual revenue of 2,400,000 SAR and a gross margin of 35 percent. Gross profit is therefore 840,000 SAR and cost of sales is 1,560,000 SAR. Operating expenses are 600,000 SAR, so net profit is 240,000 SAR, a net margin of 10 percent. On the balance sheet it carries trade receivables of 480,000 SAR, inventory of 320,000 SAR and trade payables of 195,000 SAR.

So this business pays for goods about 102 days before it is paid for them. The cash standing inside the cycle is receivables plus inventory less payables: 480,000 plus 320,000 less 195,000, which is 605,000 SAR. That is a quarter of annual revenue, permanently committed, and it is why the business can report 240,000 SAR of profit and still have a bank balance that never seems to improve.

It is also a lever. One day of DSO here is 2,400,000 divided by 365, which is 6,575 SAR. Ten days off the collection period releases about 65,800 SAR of cash, once, permanently, without selling anything extra. One day of DIO or DPO is 1,560,000 divided by 365, which is 4,274 SAR. Twenty days out of inventory is about 85,500 SAR. Knowing what a day is worth changes the conversation with a sales manager who wants to offer 90-day terms to win an order.

  • DSO: 480,000 divided by 2,400,000, times 365, equals 73.0 days.
  • DIO: 320,000 divided by 1,560,000, times 365, equals 74.9 days.
  • DPO: 195,000 divided by 1,560,000, times 365, equals 45.6 days.
  • Cash conversion cycle: 73.0 plus 74.9 minus 45.6, equals 102.3 days.

What happens to the same business when it grows

Now suppose that business grows revenue by 40 percent, to 3,360,000 SAR, and every ratio holds: the same margins, the same collection period, the same stock cover, the same supplier terms. Receivables become 672,000 SAR, inventory becomes 448,000 SAR, and payables become 273,000 SAR. Cash inside the cycle rises to 672,000 plus 448,000 less 273,000, which is 847,000 SAR.

That is an increase of 242,000 SAR over the previous 605,000 SAR. Net profit in the bigger year, at the same 10 percent margin, is 336,000 SAR. So of 336,000 SAR of profit earned, 242,000 SAR is absorbed by the growth in working capital before a single riyal of tax, loan repayment, dividend or new equipment is paid for. What is left is 94,000 SAR. The business is 40 percent bigger, more profitable than it has ever been, and generating less free cash than the owner expected by a wide margin.

Push the growth harder and the arithmetic turns hostile. At 80 percent growth the working capital increase would be around 484,000 SAR against profit of 432,000 SAR, and the business would consume cash on an operating basis despite excellent trading. Nothing in the profit and loss account will warn you. This is why a growth plan without a cash plan attached to it is not a plan.

The same arithmetic run in reverse is the reason a shrinking business often feels flush with cash for a few months. Receivables and inventory unwind and release money, and owners sometimes read that as a sign of health at exactly the wrong moment. Cash released by contraction is a one-off, and it runs out.

The early warning signs in the accounts

The useful thing about this failure mode is that it is slow and it leaves marks. By the time the bank balance is alarming, the ratios have been drifting for two or three quarters. These are the signs, and each one can be read from a normal month-end pack.

None of these requires sophisticated analysis. They require someone to look at the same four or five numbers every month and notice the direction. Most systems that hold your sales and purchase ledgers can produce the ageing, the stock valuation and the trend without special work; Skyline Nexus produces the receivables and payables ageing and the stock position from the same ledger the accounts are built on, which at least means the figures you compare are consistent with each other.

  • Receivables growing faster than revenue. If revenue is up 20 percent and receivables are up 45 percent, collection has deteriorated and the difference is cash you have lent to your customers.
  • The ageing report thickening at the far end. Watch the proportion over 90 days, not the total. Old debt rarely improves on its own and is the first place bad debt hides.
  • Inventory growing faster than cost of sales, especially where the growth is concentrated in slow-moving lines rather than across the range.
  • DPO rising without a negotiated change in terms. That is not efficiency, it is late payment, and it is usually the first symptom rather than a strategy.
  • Increasing reliance on the overdraft or facility at the same point every month, with the peak drawing deeper each cycle.
  • Tax or VAT balances being carried forward rather than settled, which is expensive borrowing from an authority that does not negotiate.
  • Profit rising while cash generated from operations falls. If you produce a cash flow statement, this comparison is the single most valuable line in it.
  • Gross margin drifting down while revenue rises, which usually means growth is being bought with discounts.

The short cash forecast

Ratios tell you the shape of the problem. They do not tell you whether you can pay salaries on the 28th. For that you need a rolling short-term cash forecast, usually thirteen weeks, built on dates rather than accounting periods. Thirteen weeks is long enough to see a quarterly tax payment or a seasonal dip coming and short enough that the assumptions are still real.

Build it from the actual ledger: every unpaid customer invoice placed in the week you genuinely expect payment, not the week it is contractually due; every supplier invoice on its due date; payroll, rent, loan repayments and tax on their known dates. Then add expected new sales and their collection dates, which is the only genuinely uncertain part. The output is an opening and closing bank balance for each of thirteen weeks, and the number you look at is the lowest closing balance in the period.

Update it weekly and compare last week forecast against what actually happened. The comparison is what makes the forecast honest, because it exposes optimistic collection assumptions within two or three weeks rather than at the point of crisis. A forecast that is never compared to outcome drifts into wishful thinking very quickly.

What to do when the cash is tight

When the forecast shows a trough, there are a limited number of real actions, and they are worth ranking by speed and by cost. The fastest and cheapest are almost always inside the cycle rather than outside it.

Two things not on that list deserve a mention. Cutting price to accelerate sales usually makes a cash problem worse, because it consumes more stock and creates more receivables at a lower margin. And paying a tax authority late is rarely the cheapest form of credit once penalties and the loss of goodwill are counted.

  • Invoice immediately on delivery. Days lost between delivery and invoicing are pure, free days added to your cycle, and this is the most common unforced error in small businesses.
  • Call on the largest overdue balances first, by value, not by age. Five calls usually cover most of the money.
  • Fix the disputes. A material share of very old debt is not refusal to pay, it is an unresolved query about a delivery, a price or a purchase order number that nobody has closed.
  • Take deposits or stage payments on large or bespoke orders. This changes the cycle at its source and is far easier to agree before an order than after.
  • Sell or return dead stock, even at a poor margin. Stock that has not moved in a year is not inventory, it is cash you have already spent, and holding it costs more.
  • Negotiate supplier terms openly rather than paying late silently. A supplier who agrees to 60 days is an asset; a supplier you have quietly stopped paying becomes a problem quickly.
  • Defer discretionary capital spending. It is the easiest large number to move and it has no effect on trading.
  • Arrange facilities before you need them. Borrowing is available on much better terms to a business that is not visibly desperate.

What to hold your system to

None of this needs complicated software, but it does need reliable data, and specifically it needs data that is current. An ageing report that is a month behind cannot support a collection call. A stock valuation that only exists after a year-end count cannot tell you that inventory is drifting. The minimum useful standard is that invoices are raised on delivery, receipts and payments are allocated as they happen, and the ageing and stock positions can be produced on any day without a reconstruction exercise.

Beyond that, four reports cover most of what an owner needs: the receivables ageing with the over-90 bucket visible, the payables ageing with due dates, an inventory position with a slow-moving flag, and a rolling thirteen-week cash forecast. If those four are produced monthly, read monthly and compared to the previous month, the drift described in this guide becomes visible long before it becomes dangerous.

The final point is a discipline rather than a report. Profit is an opinion about a period; cash is a fact about a date. Both are worth measuring, and neither substitutes for the other. A business that manages only profit will eventually be surprised by its bank balance. A business that manages only cash will eventually discover it has been trading at a loss. The work is to keep both in view at the same time, every month, and to know which one is asking the question in front of you.

Common questions

How can a profitable business run out of money?

Profit is measured on the accrual basis, which records revenue when it is earned and cost when it is incurred, not when money moves. Cash is consumed by unpaid customer invoices, inventory on the shelf, capital purchases, loan principal repayments and tax balances, none of which the profit figure reflects in full. A business can therefore earn genuine profit on every order and still be unable to meet a payment on a particular day, which is what actually causes failure.

What is the cash conversion cycle and how do I calculate it?

It is the number of days between paying for goods and being paid for them, calculated as DSO plus DIO minus DPO. DSO is trade receivables divided by revenue times 365; DIO is inventory divided by cost of sales times 365; DPO is trade payables divided by cost of sales times 365. Use revenue for receivables and cost of sales for inventory and payables, and track the trend month by month rather than fixating on a single figure.

Why does a growing business need more cash?

Working capital scales with revenue, so running twice the volume through the same cycle ties up roughly twice the cash in receivables and inventory. The cash requirement is a proportion of the whole revenue, while the profit that funds it is only a proportion of the margin, so the requirement usually outruns the profit. In the illustrative example in this guide, 40 percent growth absorbed 242,000 SAR of working capital against 336,000 SAR of profit earned.

What are the earliest signs of a cash problem in the accounts?

The clearest early signs are receivables growing faster than revenue, the over-90-day bucket in the ageing report thickening, inventory growing faster than cost of sales, and days payable rising without any negotiated change in terms. Profit rising while cash generated from operations falls is the single most telling comparison. These signals typically appear two or three quarters before the bank balance becomes alarming.

How long should a cash flow forecast cover?

For operational decisions a rolling thirteen-week forecast built on payment dates rather than accounting periods works well, because it is long enough to see a quarterly tax payment or seasonal dip coming and short enough that the assumptions remain realistic. Build it from the actual open invoices in your ledgers, placed in the week you genuinely expect payment. Update it weekly and compare the previous forecast to what actually happened, or the collection assumptions will quietly become optimistic.

This guide is general information, not tax, accounting or legal advice. Rules differ from country to country and change over time; confirm the current position with your tax authority or a qualified adviser before acting on anything here.

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