Accounting & close
Days payable outstanding (DPO)
Also known as DPO
Days payable outstanding is the average number of days a company takes to pay its suppliers.
Also known as DPO
Days payable outstanding is the average number of days a company takes to pay its suppliers.
Key takeaways
Days payable outstanding is the average number of days a company takes to pay its suppliers. It converts the accounts payable balance into a time figure, so it can be compared across periods as the business grows. A longer DPO holds cash for longer, but past your agreed terms it stops being working-capital efficiency and becomes late payment.
Formula
DPO = (Accounts Payable ÷ Cost of Goods Sold) × Number of Days in Period
With $210,000 in payables and $1.4M of quarterly COGS, DPO is about 14 days ((210,000 ÷ 1,400,000) × 90).
Large US public companies ran a median DPO of about 59 days in the 2025 survey — a figure driven by buyer leverage that a 40-person company does not have and should not try to copy. The useful comparison is against your own stated terms: a DPO close to but slightly under your average supplier terms means you are using the float you agreed to without going late.
Source: Hackett Group US Working Capital Survey (2025)
Use average payables when the balance moved
Opening plus closing, divided by two, is the more defensible numerator when payables swung inside the period — which happens whenever a large annual invoice lands. A single renewal can add a week to a month-end DPO and then take it back, and neither move says anything about how you pay.
The ratio cannot tell you whether a long DPO is strength or strain. It can reflect negotiated terms with suppliers who want your volume. It can equally reflect invoices nobody approved and payment runs you skipped. Both produce the same number.
The aging report can tell them apart, because they leave different shapes:
| Discipline | Distress | |
|---|---|---|
| Over-90 bucket | Thin | Fat, and growing |
| What changed | Terms were renegotiated | Payment runs were skipped |
| Supplier conversations | Happened in advance | Happen when they chase |
| DSO alongside it | Steady | Rising too |
One tell settles it quickly. If DPO rose while the over-90 bucket stayed flat, you renegotiated. If DPO rose because the over-90 bucket grew, you are simply paying late and calling it working-capital management.
The cash conversion cycle is DIO plus DSO minus DPO. DPO enters as a subtraction, which is exactly where the trap sits: you can shorten the cycle by taking longer to pay, without selling any faster or collecting any better. The headline improves and nothing about the business has.
Read DPO against DSO rather than alone. A DPO of 45 against a DSO of 30 means your suppliers are funding you. A DPO of 45 against a DSO of 75 means you are stretching suppliers because customers are stretching you, and the problem to fix is in collections.
Lengthening DPO has a price whenever a supplier offers a discount for paying early. Converting the discount to an annual rate is what makes the two comparable. The standard conversion is the discount percentage divided by 100 minus that percentage, multiplied by 360, divided by the days between the discount date and the due date.
| Terms | Days of cash given up | Effective annual rate |
|---|---|---|
| 2/10 net 30 | 20 | 36.7% |
| 1/10 net 30 | 20 | 18.2% |
| 0.5/10 net 30 | 20 | 9.0% |
| 0.5/10 net 60 | 50 | 3.6% |
Compare the result against your own cost of funds. The US Treasury sets a Current Value of Funds Rate for exactly this decision, at 4.00% for calendar 2026, and takes any discount that converts above it. Substitute a revolver at 11% and the bottom two rows flip from take to skip. The method survives the substitution; only the threshold changes.
A supplier finance programme produces a long DPO without any negotiation: a bank pays your supplier early and you pay the bank later. Buyers in these programmes typically present the obligation in the same balance sheet line as accounts payable, so payables and DPO can both look healthy while the underlying obligation behaves more like borrowing.
FASB's ASU 2022-04 does not change that presentation. It requires you to disclose the programme's key terms, the amount outstanding, and where in the balance sheet those obligations sit — which exists precisely because the ratio on its own hides the distinction.
Payables are the only part of working capital you control unilaterally, so DPO is the fastest lever you have on cash — and the easiest one to pull too hard. Used to terms it is free float. Used past terms it costs supplier goodwill, priority when something is scarce, and eventually your credit terms, none of which appear in the ratio.