Days Payable Outstanding

Days Payable Outstanding measures how many days a company takes on average to pay its suppliers. A higher value means the company keeps its cash for longer and preserves liquidity. However, payment terms that are too long can strain relationships with suppliers. It is calculated as average trade payables divided by the related annual credit purchases, multiplied by 365 days. Where purchasing data is unavailable, cost of materials or cost of sales is often used as a proxy.

Economically this is supplier financing, often without a separately stated interest charge, directly reducing the working capital required. The calculation only works, however, if no early payment discount is lost: forgoing a two percent discount for payment within ten rather than 30 days gives up a benefit that annualises to a very high interest rate and is therefore almost always more expensive than a credit line. Negotiated payment terms should be distinguished from overdue invoices. A conspicuously rising figure is therefore a warning sign in analysis: it can indicate deliberate optimisation, but equally liquidity problems and deferred invoices.

In transactions the metric matters twice over, because it feeds into the cash conversion cycle and because payment practice stretched shortly before the reference date reduces reported net working capital and may need to be addressed in the purchase price adjustment. A breakdown by supplier is informative, because a high average can stem from a few large suppliers with negotiated terms or from broad stretching across many small ones. The latter points more to liquidity problems. Prepayments to suppliers also deserve attention, since they are customary in some sectors and tie up cash without being directly captured by the standard DPO formula. For the purchase price adjustment the parties assess whether and how such effects should be normalised.