What it means
Cash leaves a business early and returns late, and the cycle measures exactly how late. It has three moving parts: how long stock sits before it sells, how long customers take to pay, and how long the business takes to pay its own suppliers.
Stretching supplier payment shortens the cycle, while slow stock and slow collections lengthen it. The commonest measure is the cash conversion cycle, calculated as days inventory outstanding plus days sales outstanding minus days payables outstanding.
A positive figure means the business funds the gap itself, from its own cash, an overdraft or a loan. A negative figure means suppliers and customers are effectively funding the business, which is how subscription services and many supermarkets operate.
The number matters because it converts directly into money. Every day of cycle length multiplied by daily cash operating costs equals cash locked up in the business, so shortening the cycle releases cash without raising a single dollar of new finance.
That is why operational fixes such as invoicing faster often beat financing fixes. Different industries sit naturally at very different cycle lengths, so comparisons only make sense within a sector.
A specialist machinery builder with six-month lead times may run a 150-day cycle quite healthily, while a coffee chain runs a negative one. What matters is the trend in your own numbers and how it compares with close competitors.
Beware the temptation to improve the cycle purely by paying suppliers later. It works arithmetically, but pushed too far it damages relationships, forfeits early settlement discounts and can lead to supply being withdrawn at the worst possible moment.
Sustainable improvement usually comes from stock discipline and faster invoicing.
In practice
Real-world examples.
Example
A craft brewery holds 70 days of stock, collects from bars in 40 days and pays maltsters in 25 days, giving an 85-day cycle. Switching two large accounts to direct debit cuts collections to 20 days and frees enough cash to buy a second fermenter outright.
Example
An online subscription box charges customers on the first of the month and pays suppliers 45 days later. Its cycle is negative, so growth actually generates cash rather than consuming it, and the founder can fund expansion from operations.
Example
A construction subcontractor pays wages weekly but is paid 60 days after certification. The long cycle means a doubling of the order book would require roughly double the working capital facility, which the finance director flags before the tender is submitted.
Think of it
“Cash flow cycle is how long your cash is tied up-from paying suppliers to collecting from customers.
Formula
Calculation
Cash flow cycle in days = Days Inventory Outstanding + Days Sales Outstanding - Days Payables Outstanding.
A components wholesaler has annual revenue of $3,650,000 and annual cost of goods sold of $3,650,000 measured on a daily basis at $10,000 a day. Average inventory is $600,000, average receivables are $450,000 and average payables are $300,000.
Days Inventory Outstanding = $600,000 / $10,000 = 60 days.
Days Sales Outstanding = $450,000 / $10,000 = 45 days.
Days Payables Outstanding = $300,000 / $10,000 = 30 days.
Cash flow cycle = 60 + 45 - 30 = 75 days. At $10,000 of daily operating cost, that cycle ties up 75 x $10,000 = $750,000 of cash. If the warehouse team cuts inventory days from 60 to 45, the cycle falls to 60 days and releases 15 x $10,000 = $150,000 in cash.Case study
Seen in the real world.
Northbay Instruments is an invented company used here for illustrative purposes only. It made laboratory equipment, grew orders by 35% in a year, and still had to extend its overdraft twice, which the founder found baffling given rising profits.
A review found a 118-day cash flow cycle: 72 days of components sitting in the stores, 61 days to collect from hospital customers, and only 15 days of supplier credit taken. Three changes followed. Slow-moving components moved to consignment stock, invoices went out on despatch rather than at month end, and supplier terms were renegotiated to 35 days.
The illustrative outcome was a cycle of 74 days within two quarters and about $640,000 of cash released, which repaid the overdraft. Nothing about sales or pricing changed, only the timing of money.
Watch out
Common mistakes.
- Comparing cycle length against businesses in unrelated industries, where a 90-day cycle may be perfectly normal rather than a warning sign.
- Using year-end balance sheet figures instead of average balances, which distorts the result badly in seasonal businesses.
- Improving the cycle only by delaying supplier payments, which borrows goodwill rather than genuinely fixing working capital.
Questions
People also ask.
Can the cash flow cycle be negative?
Yes, and it is a strong position, meaning customers pay before suppliers are due, as with prepaid subscriptions and fast-turnover retail.
Which lever should be pulled first?
Usually collections, because invoicing accurately and chasing early costs almost nothing and works within weeks.
Does a shorter cycle always mean a healthier business?
Not necessarily, since a very short cycle achieved by holding too little stock can cause lost sales and unhappy customers.
From the founder's library
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