Cash Conversion Cycle

Formula

CCC = DSO + DIO − DPO

Assume:

• DSO: 42 days
• DIO: 58 days
• DPO: 50 days

CCC:

42 + 58 − 50 = 50 days

The simplified interpretation is that the company’s cash is committed to the operating cycle for about 50 days after supplier financing is considered.

The three components

DSO estimates how long customers take to pay.

DIO estimates how long inventory remains before sale or use.

DPO estimates how long the company takes to pay suppliers.

Receivables and inventory consume working capital.

Supplier credit offsets part of that need.

That is why DPO is subtracted.

Why CCC matters

A company can report strong revenue growth while cash generation weakens because more money is tied up in:

• receivables
• inventory

A rising cash conversion cycle can reveal that pressure.

A falling cycle can indicate:

• faster collections
• leaner inventory
• longer supplier terms

The total number is useful only after the driver is identified.

A lower CCC can be genuinely better

Suppose DSO falls from 50 to 40 days while DIO and DPO remain unchanged.

Customers are paying faster.

Cash is released.

That is usually a high-quality improvement.

The same is true when DIO falls because inventory turns faster without hurting sales or margins.

A lower CCC can also come from stretching suppliers

Assume:

• DSO: 45 days
• DIO: 60 days
• DPO: 40 days

CCC:

65 days

If DPO rises to 65 days:

CCC:

40 days

The cash cycle improved mathematically.

But the entire improvement came from paying suppliers later.

That can be sustainable if terms were renegotiated.

It can be a warning if invoices are simply overdue.

CDW shows why the components matter

CDW reported a cash conversion cycle of 21 days at June 30, 2026, up from 16 days a year earlier. Its components were:

• DSO: 93 days
• days of supply in inventory: 16 days
• DPO: 88 days.^[1]

Higher receivable and inventory days lengthened the cycle, while higher payable days partly offset them.

The 21-day total alone would not explain that.

Methodology differs across companies

CDW uses a rolling three-month average and includes specified vendor receivables and inventory-financing payables.^[1]

Church & Dwight uses a quarter-to-quarter four-period average method.^[2]

Donaldson calculates its components from average quarterly balances and the number of days in the quarter.^[3]

All are reasonable.

They are not identical.

Cross-company comparisons need methodology review.

Negative cash conversion cycle

A company can have:

• DSO: 5 days
• DIO: 25 days
• DPO: 45 days

CCC:

-15 days

That means customer cash arrives before suppliers are paid, on average.

This can occur in businesses with:

• customer prepayments
• point-of-sale collection
• fast inventory turnover
• long supplier terms

A structurally negative cycle can be attractive because operations partly finance themselves.

Negative CCC is not free money

Supplier financing can disappear.

Vendors can:

• shorten terms
• demand cash
• raise prices
• reduce shipment priority

A negative cycle is strongest when it comes from durable customer economics and negotiated supplier terms.

It is weaker when it depends on strained vendor relationships.

DSO can rise without bad collection

Higher DSO can reflect:

• larger enterprise customers
• longer contract terms
• software billing structure
• quarter-end sales concentration
• acquisition timing

The metric still means more receivable days.

The cause determines whether it is problematic.

DIO can rise for strategic reasons

Higher inventory days can reflect:

• expected demand
• tariff planning
• supply-chain protection
• new product launches
• longer lead times

The cash cost is real even when the strategy is sensible.

DPO can rise because terms improved

Church & Dwight reported a higher DPO in 2026 and linked the change partly to extended vendor payment terms.^[2]

That is materially different from paying invoices late.

Supplier financing is valuable when it is negotiated.

CCC can improve because the business shrank

A company can:

• collect old receivables
• reduce inventory
• cut purchases

while revenue declines.

The cycle can improve and cash can be released.

That does not mean operating performance improved.

Cash efficiency and business trajectory should be read together.

CCC can worsen during healthy growth

Expansion can require:

• more customer credit
• more inventory
• new supplier relationships

The cycle can lengthen temporarily.

The right question is whether the added working capital creates an attractive return.

Acquisition timing can distort the calculation

A late-quarter acquisition can add:

• receivables
• inventory
• payables

immediately.

Only part of the acquired sales and COGS may be included in the period.

That mismatch can distort all three components.

Some companies use pro forma or multi-period averaging to reduce the problem.

CCC and operating cash flow should broadly agree

A rising cycle generally means more cash is tied up in working capital.

A falling cycle generally means cash is being released or suppliers are financing more of the cycle.

The relationship is not exact because cash flow also reflects:

• taxes
• compensation
• acquisitions
• foreign exchange
• other operating assets

The direction should still make economic sense over time.

CCC does not measure profitability

A company can have:

• excellent margins
• weak cash conversion

or:

• thin margins
• excellent cash conversion

CCC measures timing.

It does not measure profit per sale.

A useful CCC review asks:

1. DSO: Are customers paying faster or slower?
2. DIO: Is inventory moving efficiently?
3. DPO: Are supplier terms stronger or being stretched?
4. Method: What balances and averaging periods are used?
5. Growth: Is the cycle change driven by expansion or deterioration?
6. Cash flow: Does operating cash flow support the story?

The cash conversion cycle is most useful when it shows where cash is getting stuck rather than reducing working-capital analysis to one total number.