Investing Basics

Days Payable Outstanding

Days payable outstanding estimates the average number of days a company takes to pay suppliers. A common formula divides average accounts payable by average daily cost of sales.

Updated 2026-09-02 · Foundation

Formula

DPO = Average accounts payable ÷ Average daily cost of sales

Assume:

average accounts payable: $250 million
quarterly cost of sales: $450 million
quarter length: 90 days

Average daily COGS:

$5 million

DPO:

50 days

The company takes roughly 50 days, on average, to pay the supplier obligations represented by the formula.

Why DPO matters

Accounts payable is an operating source of financing.

A company can:

receive inventory
sell it
collect from customers
pay suppliers later

The longer suppliers allow payment to remain outstanding, the less of the company's own cash is tied up in the operating cycle.

That makes DPO an important working-capital measure.

DPO inside the cash conversion cycle

The common formula is:

CCC = DSO + DIO − DPO

DPO is subtracted because supplier credit offsets part of the time cash is committed to receivables and inventory.

Higher DPO usually shortens the cash conversion cycle.

That does not automatically make higher DPO better.

Higher DPO can reflect bargaining strength

Large buyers can negotiate:

longer payment terms
seasonal extensions
structured vendor programs

If suppliers agree because the buyer is valuable and creditworthy, the higher DPO can be a durable advantage.

The company effectively receives more supplier financing.

Higher DPO can also signal payment stress

The same ratio can rise because invoices are not being paid on time.

Warning signs include:

late-payment penalties
vendor disputes
reduced shipment priority
cash-on-delivery demands
tighter supplier credit

The ratio does not tell whether payment timing is negotiated.

That distinction is central.

CDW example

CDW reported DPO of 88 days at June 30, 2026 versus 77 days a year earlier. The company said the increase reflected payment timing and increased sales activity.^[1]

The higher DPO partly offset higher DSO and inventory days inside the cash conversion cycle.

That is the mathematical role of supplier financing.

Donaldson's formula

Donaldson calculates DPO by dividing average accounts payable by average cost of goods sold per day for the quarter.^[2]

This aligns:

a payable balance in the numerator
the related cost flow in the denominator

The exact payable categories can still differ by company.

Church & Dwight example

Church & Dwight reported DPO of 81 days for the June 2026 quarter versus 77 days a year earlier and said the increase was primarily related to extending payment terms with certain vendors.^[3]

That is a stronger quality improvement than simply paying agreed invoices late.

Negotiated terms are more sustainable.

Which payables belong in the numerator?

Companies can use:

trade accounts payable
inventory-financing payables
selected supplier balances

They may exclude:

tax liabilities
accrued compensation
acquisition liabilities
nontrade payables

CDW uses specified trade and inventory-financing balances in its DPO methodology.^[1]

Cross-company comparison requires consistent scope.

Average payables are usually better

Quarter-end timing can distort the balance.

A large supplier payment immediately before quarter-end can make ending payables unusually low.

Using average payables reduces this point-in-time effect.

Lower DPO can be strategically positive

Paying suppliers faster can produce:

early-payment discounts
better pricing
preferred inventory allocation
stronger relationships
more reliable supply

The cash timing is worse.

The economic return can be better.

A lower DPO is not automatically poor cash management.

Supply-chain finance can complicate DPO

Some companies use programs where:

a financial institution pays the supplier early
the company pays the financial institution later

The obligation can begin to resemble financing.

DPO supported by supply-chain finance should be distinguished from ordinary trade terms.

Rising DPO can temporarily boost operating cash flow

If accounts payable increases:

cash remains higher in the period

OCF improves.

That benefit reverses when the invoices are paid unless the higher payable balance becomes structurally sustainable through growth or longer terms.

One-period payable growth is not recurring cash generation.

Purchases and COGS are not identical

A company can build inventory.

Purchases exceed cost of goods sold.

Payables can rise because of those purchases.

A DPO formula based on COGS can move partly because purchasing patterns changed.

Unusual inventory builds deserve extra context.

Supplier economics matter

A company can push payment terms longer.

Suppliers can respond through:

higher prices
reduced service
lower capacity allocation
stricter future terms

Working-capital optimization can shift financing pressure down the supply chain.

That trade-off matters where specialized vendors are important.

DPO does not measure profitability or solvency

Higher DPO improves cash timing.

It does not directly improve gross profit.

A company can have high DPO while facing:

operating losses
debt maturities
weak liquidity
limited credit access

Supplier financing is only one part of the capital structure.

Example

Average accounts payable of $250 million divided by average daily cost of sales of $5 million produces DPO of 50 days. If payables rise to $325 million with daily COGS unchanged, DPO rises to 65 days.

Professional note

A useful DPO review asks:

Terms: What payment period have suppliers agreed to?
Definition: Which payable categories are included?
Trend: Is DPO moving because of terms, timing or purchase mix?
Suppliers: Are relationships or discounts changing?
Financing: Is supply-chain finance involved?
Cash: How much OCF came from payable growth?

DPO is most useful when it distinguishes sustainable supplier financing from temporary payment delay.

Related terms

Absolute Priority Rule
The Absolute Priority Rule is the Chapter 11 principle reflected in Bankruptcy Code Section 1129(b) that, in specified cramdown circumstances, prevents a junior class from receiving or retaining property on account of its junior claim or interest when a senior dissenting class is not paid in full.
Accounts Payable
**Accounts payable** are amounts owed to suppliers for goods or services a company has received but has not yet paid for. They are generally current liabilities and can function as a form of short-term operating financing because the company receives value before cash leaves.
Accounts Receivable
**Accounts receivable** are amounts owed by customers for goods or services a company has already provided but has not yet collected in cash. Companies usually report receivables net of allowances for expected credit losses, returns, discounts or other adjustments.
Accrued Expenses
Accrued expenses are costs a company has incurred but has not yet paid in cash. They are generally recorded as liabilities so expense recognition follows the economic period rather than the payment date.
Accumulated Other Comprehensive Income (AOCI)
Accumulated other comprehensive income is the cumulative equity balance of specified gains and losses recognized in other comprehensive income rather than ordinary net income.
Add-On Acquisition
An add-on acquisition is a company purchased by an existing portfolio company—often a platform company—to expand scale, geography, products, customers, capabilities or market share.

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