01
Invoice the day the work completes
The payment clock starts when the invoice is issued rather than when the work is done. Every day between the two is a day added to the cycle for nothing, and this is ordinarily the quickest improvement to make.
Guide
The number of days your money is somewhere else.
The cash conversion cycle measures how long a dollar spends inside the business before it comes back. It is the single most useful number in working capital, and almost nobody calculates it.
MS
Matt Stiles Editor
Published 8 September 2026 Last reviewed 8 September 2026 Read time 12 min
The short version
Five lines that describe the measure.
- Three numbers make one. Days stock is held, plus days customers take to pay, less days suppliers allow. The result is the funding gap in days.
- It converts days into dollars. Multiplying the cycle by daily cost of sales gives roughly how much capital is permanently tied up.
- Every component is actionable. Unlike most financial measures, each of the three can be moved by ordinary operational work rather than by financing.
- Negative is possible and enviable. A business paid before it pays has a negative cycle, which means customers fund its operations rather than the reverse.
- Indicative only. This is general information rather than accounting advice. How the underlying figures are compiled is a question for the accountant.
The three components
What each one measures, and how it is calculated.
Days inventory outstanding is average inventory divided by the daily cost of goods sold. It answers how long, on average, a unit of stock sits before it is sold. A business holding $210,000 of stock against $1.4m of annual cost of sales is holding roughly 55 days.
Days sales outstanding is average receivables divided by daily sales. It answers how long customers actually take, which is frequently a different number from the terms they were given. A ledger of $290,000 against $2.1m of annual sales is roughly 50 days.
Days payables outstanding is average payables divided by daily cost of sales, and it answers how long the business takes to pay its own suppliers. Payables of $180,000 against $1.4m of cost of sales is roughly 47 days.
DIO
Inventory over daily COGS
DSO
Receivables over daily sales
DPO
Payables over daily COGS
CCC
DIO plus DSO less DPO
A worked cycle
The three numbers, combined.
Illustrative figures for a small New Zealand wholesaler, using the amounts from the working capital guide.
| Component | Calculation | Days |
|---|---|---|
| Days inventory outstanding | $210,000 over daily COGS of $3,836 | 55 |
| Days sales outstanding | $290,000 over daily sales of $5,753 | 50 |
| Days payables outstanding | $180,000 over daily COGS of $3,836 | 47 |
| Cash conversion cycle | 55 plus 50 less 47 | 58 |
| Capital tied up | 58 days at $3,836 a day | ~$222,000 |
Illustrative on stated assumptions and rounded. Not a template for any particular business.
Reading the result
What 58 days actually means.
The business funds its own operations for 58 days. Money spent buying stock does not return until nearly two months later, and that gap exists permanently at the current level of trading. Roughly $222,000 is inside the cycle at any moment, which is the amount that has to come from retained profit, from the owners, or from a facility.
That figure is also what tells the business what happens when it grows. Increasing turnover by 30% increases the capital inside the cycle by roughly the same proportion, which is why growth consumes cash. A business planning to grow without planning for that arrives at the funding conversation as an emergency rather than as a plan.
The other use of the number is as a target. Taking ten days out of the cycle releases roughly $38,000 permanently, and that is money that never has to be borrowed or repaid. It is one of the very few improvements in business that is genuinely free.
By business shape
What the cycle typically looks like.
Indicative shapes rather than benchmarks. The point is that the same measure produces very different results depending on how a business trades.
| Feature | Retail, cash sales | Wholesale, credit sales | Services, no stock |
|---|---|---|---|
| Days inventory outstanding | Moderate | High | None |
| Days sales outstanding | Near zero | High | High |
| Days payables outstanding | High | Moderate | Low |
| Typical cycle | Negative | Long | Moderate |
| Where the funding goes | Little needed | Stock and debtors | Payroll |
A retailer selling for cash and paying suppliers in sixty days has a negative cycle, which is why supermarkets can operate with negative working capital and be entirely healthy. A wholesaler carrying stock and selling on credit has the longest cycle of the three.
The levers
Four ways to shorten the cycle.
Ranked roughly by how quickly they work. None of them involves a lender.
02
Fix the invoicing itself
Correct references, correct recipient, correct format. A large share of slow payment is invoices that never entered the customer’s process, which shows up as days without anyone deciding anything.
03
Buy more often in smaller quantities
Lower inventory days at a slightly higher unit cost is frequently the better trade once holding costs are counted, and it reduces the risk of writing down a range that stops selling.
04
Use the supplier terms already granted
Paying on day 20 when terms are 30 shortens nothing except the business’s own cash position. Using the full term costs nothing and adds days directly.
The lever to use carefully
Stretching suppliers improves the number and can cost more than it saves.
Paying beyond agreed terms lengthens days payables outstanding and shortens the cycle, which looks like an improvement in the measurement. What it actually does is fund the business at the supplier’s expense, and the price arrives as lost settlement discounts, tighter terms at the next review, lower priority when stock is short, and a relationship that no longer helps in a difficult month. Using the terms already granted is free. Taking terms that were not granted is borrowing from the party least able to say no.
Worked example
Ten days out of the cycle, and what it releases.
The wholesaler above runs at 58 days. It makes three changes across a quarter: invoices go out the day work completes rather than at month end, a purchase order reference is added to every invoice at the customer’s request, and stock is ordered fortnightly rather than monthly on the three slowest ranges.
Days sales outstanding falls from 50 to 44 as invoices enter the customer’s process cleanly and earlier. Days inventory outstanding falls from 55 to 51 on the changed ranges. The cycle moves from 58 days to 48.
At $3,836 a day of cost of sales, that releases roughly $38,000 of capital permanently. Nothing was borrowed, nothing was repaid, and the improvement persists as long as the practices do. Against a facility cost of 13%, the same $38,000 borrowed would have cost about $4,900 a year.
Illustrative figures
- Cycle before
- 58 days
- Cycle after
- 48 days
- Daily cost of sales
- ~$3,836
- Capital released
- ~$38,000
- Equivalent annual funding cost avoided
- ~$4,900
Illustrative on stated assumptions and rounded. Not a projection for any particular business.
Using it with a lender
Why a lender finds this more persuasive than a forecast.
A business asking for a facility and explaining that it needs $150,000 because cash is tight is describing a symptom. A business explaining that its cycle is 58 days, that this ties up $222,000 at current trading, and that growing 30% will add roughly $67,000 to that requirement, is describing a mechanism.
The second version is more persuasive because it is checkable. Every figure in it comes from the accounts, the lender can verify it in minutes, and it demonstrates that the business understands what it is asking for. That is worth more than any amount of optimism about the pipeline.
It also sizes the facility properly. A requirement derived from the cycle is the right number by construction, where a requirement derived from how the last few months felt is a guess that will be either uncomfortably small or unnecessarily expensive.
Method
How this guide was written, and its limits.
The three component measures are standard and the formulas are not in dispute. What varies between businesses is which figures go into them, particularly whether averages or period-end balances are used and how cost of sales is defined, and those choices change the result.
No benchmark figures for New Zealand sectors appear here, deliberately. Published averages vary by source and by definition, and a number quoted without its definition is worse than none. The useful comparison is a business against its own history rather than against a figure from elsewhere.
Nothing here is accounting or financial advice. This site is not a chartered accountant, and how a particular business should compile these measures is a question for its accountant.
Getting the inputs right
Four things that distort the calculation.
The formulas are simple. The figures that go into them are where a cycle calculation goes wrong, and each of these is common.
01
Period-end balances on a seasonal business
A balance date falling just after the peak shows a ledger at its largest and stock at its smallest, producing a cycle that resembles no month of the actual year. Averaging across the period fixes it.
02
Mixing sales and cost of sales
Receivables divide by daily sales, and inventory and payables divide by daily cost of goods sold. Using one denominator throughout is a common shortcut and it produces a number that cannot be compared with anything.
03
GST on one side but not the other
Receivables and payables ordinarily include GST and the income statement figures ordinarily do not. Being consistent matters more than which convention is chosen, and mixing them inflates the days on both sides.
04
Ignoring deposits taken
Customer deposits are a current liability that shortens the effective cycle, and a business taking them and not counting them is measuring a longer cycle than it actually runs.
What it is not
The cycle is not a forecast.
It describes how the business has been trading rather than how it will trade. A cycle calculated on last quarter is an accurate summary of last quarter, and it becomes a forecast only once somebody adds what is changing: a new customer on longer terms, a range being cleared, a supplier tightening.
It also says nothing about profitability. A business can have an excellent cycle and lose money on every job, and a business with a long cycle can be highly profitable and simply need more capital to run. The two measures answer different questions and neither substitutes for the other.
What it does uniquely well is connect operational decisions to cash. A decision to offer a customer sixty-day terms has a number attached to it under this measure, and a decision to buy quarterly rather than monthly does too. Very few management measures make that link as directly.
Growth
Why the cycle is the number to plan growth against.
A business planning to grow thirty percent is planning to increase the capital inside its cycle by roughly the same proportion, and that money is needed before the additional revenue arrives. On the worked example above, growing from $1.4m to $1.8m of cost of sales adds around $63,000 to what is permanently tied up.
That figure is the honest funding requirement for the growth, and it is separate from any investment in capacity. A business that raises capital for equipment and staff and forgets the working capital finds itself with the ability to deliver more work and no cash to deliver it with, which is a well-worn way for a good year to become a difficult one.
The reverse is also useful. A business shortening its cycle while growing can fund a meaningful share of the growth from the improvement, which is the most efficient capital available and requires no application to anyone.
Presenting it
How to put the cycle in front of a lender or a board.
Three numbers and a sentence is enough. The cycle in days, the capital it ties up in dollars, and the direction it has moved over the last four periods, followed by what is being done about it. That fits on one slide and it demonstrates more command of the business than a page of forecasts.
Where the cycle has lengthened, saying so plainly and naming the cause is stronger than presenting only the improvement. A lengthening cycle caused by a deliberate decision to win a large customer on longer terms is a different story from one nobody noticed, and the difference is entirely in whether the business can explain it.
The same presentation works internally. A management team that sees the cycle monthly starts making operational decisions with the cash consequence attached, which is the point of measuring it at all rather than a reporting exercise.
Comparing periods
What to hold constant when the cycle moves.
A cycle that lengthens by six days has one of three causes: stock is moving more slowly, customers are paying more slowly, or the business is paying its suppliers faster. Because the measure combines all three, the headline movement says nothing about which, and the useful step is always to look at the components before drawing a conclusion.
Two of those causes are problems and one is not necessarily. Paying suppliers faster to secure a discount or a better allocation is a decision rather than a deterioration, and a cycle that lengthened for that reason is doing what it was told to do.
Keeping the calculation method fixed between periods is what makes the comparison meaningful at all. Switching from period-end balances to averages, or changing how GST is treated, produces a movement that looks like a change in the business and is entirely a change in the arithmetic.
The funding side
What funding the cycle costs.
The cycle says how much capital is tied up. This says what it costs to fund it while the operational improvements are being made. Indicative only, and not a quote or offer of credit.
Indicative interest cost
Weekly
$188/week
$813 /month $9,750 a year while drawn
$150,000
$5,000 $500,000
$75,000
Nothing drawn Fully drawn
13.00% p.a.
8% (secured) 30% (unsecured)
Indicative only. Not a quote or offer of credit. Actual rates, fees, and repayments depend on the business profile and the lender's decision.
Sending to Prospa
Your $150,000 scenario
$75,000 drawn at 13.00% . Prospa will ask a few quick questions, then provide a firm quote and funding if eligible.
Redirecting…
References
Sources
- External Reporting Board
The publisher of the standards governing how inventory, receivables and payables are recognised.
- Stats NZ
Context for New Zealand business trading and payment patterns.
- Ministry of Business, Innovation and Employment
Context for New Zealand work on business payment practices and payment times.
- Inland Revenue, business income tax
Context for how trading stock and receivables interact with a business’s tax position.
- Chartered Accountants Australia and New Zealand
Referenced for the point that how these measures are compiled belongs with a chartered accountant.
FAQ
Questions, answered
What is the cash conversion cycle?
The number of days between paying for something and being paid for it. It is days inventory outstanding plus days sales outstanding, less days payables outstanding, and it measures how long a business funds its own operations.
How is days sales outstanding calculated?
Average receivables divided by daily sales, where daily sales is annual sales divided by 365. It measures how long customers actually take, which is frequently different from the terms they were given.
How is days inventory outstanding calculated?
Average inventory divided by daily cost of goods sold. It measures how long stock sits before it sells, and it is considerably more useful tracked by range than in total.
Can the cycle be negative?
Yes, and it is enviable. A business paid before it pays its suppliers has customers funding its operations. Supermarkets and many cash-sale retailers run this way, which is why they can operate with negative working capital and be healthy.
How does the cycle convert to a dollar figure?
Multiply the number of days by daily cost of sales. That approximates how much capital is tied up inside the cycle at current trading, which is the amount that has to be funded from somewhere.
Why does growth consume cash?
Because the capital inside the cycle scales with turnover. Growing 30% adds roughly 30% to what is tied up, and that money is needed before the additional revenue arrives, which is why profitable growth can create a shortfall.
Which lever should be pulled first?
Invoicing promptly and correctly. It costs nothing, it works within a single cycle, and a large share of slow payment traces to invoices issued late or rejected by a customer’s process rather than to customers choosing to pay late.
Is stretching suppliers a legitimate lever?
Using terms already granted is free and sensible. Paying beyond agreed terms shortens the measure and costs more than it saves through lost discounts, tighter terms and a relationship that stops helping when it is needed.
What is a good cycle length?
It depends entirely on the business model, so the useful comparison is against the business’s own history rather than against a published average. The direction over several periods says more than any single figure.
How often should it be calculated?
Monthly or quarterly is commonly enough. What matters is consistency in how the figures are compiled, because a change in method produces a change in the result that looks like a change in the business.
Do lenders ask about it?
Not always by name, and a business that presents it is describing a mechanism rather than a symptom. That is more persuasive than a forecast because every figure in it comes from the accounts and can be checked in minutes.
Is this guide accounting advice?
No. It explains standard measures in general terms. This site is not a chartered accountant or a registered financial adviser, and how a particular business should compile these figures is a question for its accountant.
Related
Keep reading
What working capital is
The position, which this adds timing to.
Read onCash conversion cycle calculator
The three components, worked on your own figures.
Read onBridging a late-paying debtor
The days sales outstanding component in practice.
Read onBuying stock
The days inventory outstanding component in practice.
Read onAll eight products
What funds the cycle while it is being shortened.
Read on