Days Payable Outstanding (DPO)

Days payable outstanding (DPO) is the average number of days between when a company purchases or receives materials, supplies or services and when it pays its vendor. This working capital metric matters because accounts payable effectively provides the company with short-term, interest-free financing.

By paying suppliers at the end of agreed-upon terms, the company can retain cash longer, reduce borrowing, make short-term investments or use the cash for other business needs. But a higher DPO isn’t always better. Extending payments too aggressively — or paying suppliers later than the agreed-upon terms — can damage supplier relationships and put pressure on the company’s supply chain.

Effectively managing DPO requires financial professionals to balance the company’s liquidity objectives and contractual obligations while considering supplier health and the long-term impact on the relationship.

Quick Navigation

• Days payable outstanding formula
• Days payable outstanding calculation example
• What days payable outstanding tells us
• Factors that affect days payable outstanding
• What is a good days payable outstanding
• How to improve days payable outstanding
• FAQs about days payable outstanding

Days payable outstanding formula

Days payable outstanding is calculated by dividing average accounts payable by cost of goods sold and multiplying the result by the number of days in the reporting period.

DPO = (Average Accounts Payable ÷ Cost of Goods Sold) × 365

Where:

• Average accounts payable is typically calculated by adding the accounts payable balances at the beginning and end of the period and dividing by two.
• Cost of goods sold (COGS) represents the direct costs associated with producing the goods or services the company sold during the period.
• 365 converts the ratio into an annual number of days.

Companies may adjust the number of days when calculating DPO for a shorter reporting period. For example, a quarterly calculation may use the number of days in that quarter rather than 365.

Days payable outstanding calculation example

Assume a company reports:

• Beginning accounts payable of $8 million
• Ending accounts payable of $12 million
• Annual COGS of $100 million

First, calculate average accounts payable:

Average accounts payable = ($8 million + $12 million) ÷ 2 = $10 million

Then apply the DPO formula:

DPO = ($10 million ÷ $100 million) × 365 = 36.5 days

The company’s DPO is approximately 37 days — the average number of days the company takes to pay its suppliers.

Be sure to evaluate the result against the company’s negotiated payment terms, historical performance, supplier mix and relevant industry benchmarks. This is important because a DPO of 37 days could indicate disciplined payment management — if the company’s typical terms are net 30 or net 45. But if most suppliers require payment within 15 days, that could be concerning.

What days payable outstanding tells us

DPO helps us understand how a company manages cash outflows and supplier credit, whether the company is paying suppliers earlier or later than expected and how the payment timing affects liquidity. It can also support cash forecasting; just as days sales outstanding (DSO) can help estimate when customer payments will arrive, average DPO can help forecast when cash will leave the business to pay suppliers.

It’s important to consider context when examining changes to DPO. An increase could reflect successfully negotiated payment terms, improved payment discipline or the use of tools that extend payment float. It could also indicate liquidity problems and/or that the company is paying suppliers late. Similarly, a decreased DPO might simply reflect early-payment discounts or stronger supplier support, but it could also mean the company is unnecessarily giving up available trade credit.

High DPO

A relatively high DPO means the company is taking longer to pay suppliers. The potential advantages of this include:

• Cash retained for a longer period
• Short-term borrowing needs reduced
• Increased funds available for investment or other purchases
• Shortened cash conversion cycle

However, a high DPO can become a warning sign if the company routinely pays later than the agreed-upon terms. Suppliers could respond by raising prices, tightening credit terms, delaying orders or simply ending the relationship.

A high DPO can also place smaller or financially vulnerable suppliers under significant cash flow pressure, which could create operational risk for the buyer — particularly when the supplier provides critical or difficult-to-replace goods.

Low DPO

A relatively low DPO means the company pays suppliers more quickly, which may help the company:

• Strengthen supplier relationships
• Capture early-payment discounts
• Support financially constrained or strategically important suppliers
• Improve access to materials or preferred service

However, paying too early can reduce liquidity and increase the amount of cash tied up in working capital. A company that routinely pays before invoices are due without receiving a corresponding benefit may be giving up an important source of short-term financing.

Factors that affect days payable outstanding

Factors that can affect DPO include seasonal purchasing patterns, fluctuations in cost of goods sold, changes in supplier or product mix, one-time purchases and the timing of invoice recognition. Acquisitions, divestitures and significant changes in purchasing volume may also make one reporting period difficult to compare with another.

DPO may change even when a company has not deliberately changed its payment strategy, so companies should investigate the underlying reason for a change. An increase or decrease should not be interpreted as automatically positive or negative. Reviewing DPO across multiple periods can help distinguish an ongoing trend from a temporary fluctuation.

What is a good days payable outstanding

There is no single DPO that is good for every company. A good DPO is one that supports the company’s liquidity objectives while remaining consistent with the agreed-upon payment terms, supplier needs and industry norms.

Companies should compare their DPO against:

• Contractual payment terms
• Historical company performance
• Industry and peer benchmarks
• Supplier size and financial health
• Supplier criticality
• Geographic and legal requirements
• Company’s overall cash and working capital strategy

Industry differences can be substantial. Businesses with strong purchasing power may be able to negotiate longer terms, while companies that depend on smaller, specialized or single-source suppliers might have to pay more quickly.

A company should also distinguish between strategically increasing DPO and simply paying late. Negotiating net 60 terms and paying on day 60 is disciplined working capital management. Agreeing to net 30 terms and consistently paying on day 45 is a breach that can damage trust.

Managing the company’s supplier population under one standard doesn’t work. Suppliers may require different approaches based on spend, category, region, financial health, business criticality and the availability of alternative sources.

How to improve days payable outstanding

Companies can improve DPO by paying according to negotiated terms, negotiating terms based on supplier context, evaluating early-payment and financing options, and improving control over invoice and payment timing. The objective is to retain cash longer without placing unreasonable financial pressure on suppliers or disrupting the supply chain.

• Pay according to negotiated terms. Avoid paying invoices significantly early unless doing so produces a meaningful financial or operational benefit. Scheduling payments for the end of the agreed credit term allows the company to retain cash longer while still meeting its obligations. Improving DPO does not mean unilaterally paying invoices after they are due.
• Negotiate payment terms based on supplier context. Longer contractual terms may allow the company to retain cash without paying late. Any changes should consider the supplier’s financial health, business criticality and role in the supply chain rather than applying one approach to every supplier.
• Evaluate early-payment and financing options. Early-payment discounts, dynamic discounting, virtual cards and supply chain finance can affect payment timing and working capital in different ways. Companies should compare the financial benefit, cost and effect on suppliers before selecting an approach.
• Improve control over invoice and payment timing. Reliable invoice processing, approval and payment practices help companies avoid paying unnecessarily early or missing contractual due dates. Greater visibility into upcoming obligations can also support cash forecasting and more deliberate payment decisions.

The appropriate combination of approaches depends on the company’s liquidity needs, contractual obligations, supplier relationships and operational risk.

FAQs about days payable outstanding

What is the difference between DPO and DSO?

Days payable outstanding (DPO) measures how long a company takes to pay its suppliers and is tied to AP and cash outflows. Days sales outstanding (DSO) measures how long the company takes to collect payment from customers and is tied to AR and cash inflows. DPO and DSO are often evaluated together because both affect working capital and the cash conversion cycle.

What is the difference between DPO and accounts payable turnover?

DPO expresses the average time a company takes to pay suppliers as a number of days. Accounts payable turnover measures how many times a company pays its average accounts payable balance during a period. A higher accounts payable turnover ratio generally corresponds with a lower DPO because the company is paying suppliers more frequently. A lower accounts payable turnover ratio generally corresponds with a higher DPO because the company is taking longer to pay.

How does DPO impact the cash conversion cycle?

The cash conversion cycle (CCC) measures the number of days between when a company pays for inventory or other operating inputs and when it collects cash from customers. Because longer payment terms allow a company to hold onto cash for more time, increasing DPO generally shortens the cash conversion cycle, assuming other factors remain unchanged. A shorter cycle generally means the company needs to fund its operations for fewer days.

How does DPO impact working capital?

DPO affects working capital by determining how long a company can use supplier credit before cash leaves the business. A higher DPO generally improves short-term liquidity because the company retains cash longer. However, extending payment terms too far can strain supplier relationships, increase costs or create supply-chain risks.