Days Payable Outstanding (DPO): How to Improve It | Taxilla

Days Payable Outstanding measures the average number of days a company takes to pay its suppliers after receiving an invoice, calculated as average accounts payable divided by cost of goods sold, multiplied by the number of days in the period. Most mid-to-large enterprises target somewhere between 30 and 45 days, though the right number varies by industry and by how much leverage a company actually has with its supplier base.

The instinct a lot of finance teams have when someone says "improve DPO" is to just pay slower. That's not optimization, it's just delay, and it comes with a cost that doesn't show up on the DPO metric itself: strained supplier relationships, lost early payment discounts, and eventually, suppliers who start pricing in the risk of late payment before you even negotiate terms.

The actual tension DPO creates

A higher DPO holds cash longer, which supports liquidity and reduces reliance on short-term financing. A lower DPO signals reliability to suppliers and unlocks early payment discounts, but it also means less cash on hand for other priorities if it's not managed deliberately.

The tension is real, but it's usually framed wrong. It's not "pay fast and keep suppliers happy" versus "pay slow and protect cash." It's whether you're paying exactly on the terms you negotiated, consistently, or whether you're paying unpredictably because your AP process can't reliably hit a target date either way. According to an SAP-sponsored supplier survey, 51 percent of suppliers report that buyers are typically late with payments, and inconsistency, not the actual number of days, is usually what damages the relationship. A supplier who knows they'll be paid on day 45 every time can plan around that. A supplier who might get paid on day 45 or day 70 depending on how backed up your AP queue is that month can't.

What manual AP does to DPO

Manual processing makes DPO inconsistent almost by accident. An invoice that should clear in 30 days sits for 45 because it's waiting on an approver who's traveling. Another clears in 15 days because someone processed it quickly out of order. Averaged out, the DPO number might look fine on a quarterly report, but the supplier experience underneath it is erratic, and erratic payment timing is what actually erodes trust, more than a longer average would on its own.

This is also where early payment discounts get lost without anyone noticing. A 2 percent discount for paying in 10 days carries an implicit annualized value in the range of 36 percent, since skipping it to hold cash for 20 extra days is rarely worth more than that. Manual AP teams miss these constantly, not because the math doesn't make sense, but because an invoice stuck in approval on day 12 can't hit a day-10 discount window no matter how good the math looks.

How accounts payable automation changes the picture

Accounts payable automation doesn't extend DPO by making payments slower. It makes payment timing precise, which is a different thing entirely. Invoices get captured, matched, and approved fast enough that the payment date becomes a deliberate choice (pay on day 30 because that's the agreed term) rather than whatever day the invoice happens to clear the backlog.

That precision shows up in three specific ways. Payments can be batched and scheduled to align exactly with negotiated terms instead of going out early just because the approval happened to finish ahead of schedule, which otherwise quietly shortens your effective DPO without anyone deciding that on purpose. Early payment discount windows become visible and actionable in real time, so a 10-day discount is a choice AP can actually make rather than a deadline that's already passed by the time the invoice clears approval. Cash flow forecasting gets more reliable, since a predictable, automation-driven cycle time means finance can model outgoing cash with real confidence instead of padding every forecast for AP unpredictability.

Getting the balance right

Extending DPO deliberately and extending it accidentally look identical on a spreadsheet and completely different in practice. Deliberate extension means renegotiating terms proactively, communicating any change with suppliers directly, and holding to whatever new term gets agreed. Accidental extension means suppliers finding out they're being paid late by noticing it, invoice by invoice, with no explanation.

A few practices keep DPO improvement from tipping into supplier damage: set a target DPO range tied to actual cash flow needs rather than an arbitrary "as high as possible" goal, negotiate term changes explicitly with suppliers instead of letting payment timing drift, keep DPO within a band that doesn't create the appearance of a company having trouble paying its bills, and use consistent, predictable payment timing as a negotiating asset. Reliable payers get better terms over time, since suppliers have less risk to price into the relationship.

FAQs

How is DPO calculated?

DPO equals average accounts payable divided by cost of goods sold, multiplied by the number of days in the period being measured, typically 365 for an annual figure.

What is a good DPO for an enterprise?

Most mid-to-large enterprises target roughly 30 to 45 days, though the right number depends heavily on industry norms, supplier leverage, and how the company balances liquidity against supplier relationship risk.

Does AP automation increase or decrease DPO?

Neither by default. It makes payment timing precise and predictable, which lets a company hit whatever DPO target it deliberately sets rather than drifting based on how fast invoices happen to clear the approval backlog.

How does DPO relate to early payment discounts?

Capturing early payment discounts pulls DPO down for those specific invoices, but the tradeoff is usually worth it, since a typical 2 percent/10-day discount carries an implicit annualized value high enough that skipping it to hold cash longer rarely makes financial sense.

Can extending DPO damage supplier relationships?

Yes, particularly when the extension is inconsistent or undisclosed. Suppliers tend to tolerate longer agreed terms better than unpredictable payment timing, since predictability lets them plan around it.

See how this works inside Taxilla

Taxilla's Invoice-to-Pay automation platform schedules payments to land precisely on negotiated terms rather than whenever an invoice happens to clear approval, giving finance teams a DPO number they've actually chosen instead of one that's a byproduct of processing speed.