Days Payable Outstanding (DPO)

What is days payable outstanding (DPO)?

Days payable outstanding (DPO) is the average number of days a business takes to pay its suppliers, calculated from accounts payable, cost of goods sold, and the number of days in the period. DPO stands for days payable outstanding. A DPO of 45 means it takes, on average, 45 days to settle a supplier invoice after the cost is incurred.

It is a core working capital metric, the mirror image of days sales outstanding on the payables side. Where DSO measures how fast you collect from customers, DPO measures how long you take to pay suppliers, and the balance between the two shapes how much cash your business has on hand at any moment.

The days payable outstanding formula

DPO = (accounts payable divided by cost of goods sold) multiplied by the number of days in the period. Accounts payable is what you owe suppliers, taken from the balance sheet; cost of goods sold is the direct cost of what you bought or made over the period, from the income statement; and the period is usually 365 days for a year or 90 for a quarter. Enter your own figures below.

In the worked example, 120,000 of accounts payable against 960,000 of annual cost of goods sold gives a DPO of about 46 days. On average, the business holds onto a supplier's money for a month and a half before paying. Raise payables relative to cost, or stretch payment terms, and DPO rises; pay faster and it falls.

A worked DPO example

Take a wholesaler that owes suppliers 120,000 at year end and recorded 960,000 of cost of goods sold over the year. DPO is 120,000 divided by 960,000, which is 0.125, multiplied by 365 days, giving roughly 46 days. So the business takes about a month and a half, on average, to pay for the stock it buys.

Now suppose it negotiates net 60 terms with its main supplier and lets payables rise to 160,000 on the same cost base. DPO climbs to about 61 days, freeing up an extra 40,000 of cash that stays in the business. That is genuine working capital improvement, as long as the supplier has agreed to those terms. The same 61 days reached by simply paying net 30 invoices a month late would look identical in the ratio but would be quietly corroding the relationship, which is why the number always needs the context of your agreed terms.

What is a good DPO?

A good DPO is one that is close to the payment terms your suppliers actually offer, often in the 30 to 60 day range, without tipping into late payment. There is no universal target. The right number depends on your industry, your negotiating position, and the terms you have agreed, so the most useful comparison is against your own terms and your peers.

Treat these bands as a starting point. A high DPO is not automatically good: it can mean you are negotiating well and using free supplier credit wisely, or it can mean you are paying late, burning goodwill and risking lost discounts or stricter terms next time. The healthiest DPO is the one that uses every day you have legitimately agreed, and not one day more.

DPO vs DSO: the two sides of working capital

DPO measures how long you take to pay suppliers, while days sales outstanding (DSO) measures how long customers take to pay you. Together they bracket the cash gap your business has to fund out of its own pocket.

The relationship is straightforward and important. If your days sales outstanding is higher than your DPO, you are paying suppliers before your customers pay you, which means you are financing the gap and tying up cash. Flip it around, collect faster than you pay, and suppliers effectively fund your operations for free. This is why finance teams watch both numbers side by side rather than in isolation, and why the two feed directly into the cash conversion cycle, the headline measure of how long cash is locked up in day-to-day operations.

The honest way to improve DPO

The tempting route is simply to pay later, but stretching beyond agreed terms is a false economy. It damages supplier relationships, can trigger late fees or stricter terms, and quietly marks you as the kind of slow payer that finance teams everywhere are fighting to chase down. If you run accounts receivable, you already know how that feels from the other side.

The better route is to negotiate longer terms openly and then honor them, take early-payment discounts only when the maths clearly beats the value of holding the cash, and time payments to the terms you have rather than to the calendar. The biggest lever on your cash gap, though, is usually not DPO at all but the collection side: pulling your days sales outstanding down through better accounts receivable reporting and prompt reminders frees up cash without putting a single supplier offside.

Where DPO sits on the balance sheet

DPO is built from accounts payable, which is a current liability, the money you owe suppliers for goods and services already received but not yet paid for. The metric simply expresses that liability in days, relative to how fast you consume goods, so it stays comparable as the business grows. Because it draws on both the balance sheet (payables) and the income statement (cost of goods sold), it links your funding position to your operating activity in a single, readable number.

That is also why DPO can be quietly distorted. A one-off bulk purchase near period end inflates payables and pushes DPO up for reasons that have nothing to do with how you pay. Using average accounts payable across the period, and reading the trend over several quarters rather than a single snapshot, gives a far more honest picture than any one figure on its own. You can see the payables that drive it in your accounts payable ledger.