Definition (canonical)
Accounts payable (AP) is the money a company owes its suppliers for goods and services bought on credit but not yet paid — a short-term liability sitting on the balance sheet. It is the mirror image of accounts receivable: your payable is your supplier's receivable. AP represents purchases the business has received and recognized, with payment deferred to agreed terms — typically 30 to 90 days.
Why AP is "free" financing
Every unpaid supplier invoice is, in effect, an interest-free short-term loan from that supplier. The longer you can hold cash before paying (without breaching terms or damaging relationships), the more of your own working capital stays free to fund operations. This is why treasury teams manage payment timing deliberately: pay on the due date, not early, unless an early-payment discount beats the value of holding the cash. AP is one of the three levers of working capital, alongside receivables and inventory, and it directly shapes operating cash flow.
The AP process
A disciplined AP cycle protects against error and fraud: receive the supplier invoice, match it against the purchase order and the goods-received note (the "three-way match"), obtain approval, then schedule payment. Good AP hygiene means no duplicate payments, no missed early-payment discounts, and clean records for audit. Weak AP controls are a classic route for invoice fraud and overpayment, which is why segregation of duties between approving and paying matters.
Days payable outstanding
DPO measures the average time taken to pay suppliers: DPO = (accounts payable / COGS) × 365. A higher DPO means the company holds cash longer — good for liquidity, but stretched too far it strains supplier relationships and can trigger stricter terms or lost discounts. DPO is compared with days sales outstanding and days inventory to compute the cash conversion cycle; the art is lengthening DPO without becoming a customer suppliers dread.
FAQ
Is accounts payable an asset or a liability? A liability — it's money owed to suppliers, recorded under current liabilities on the balance sheet.
How is AP different from accounts receivable? AP is what you owe suppliers; AR is what customers owe you. One company's payable is another's receivable.
Why not pay suppliers immediately? Holding cash until the due date preserves working capital; pay early only when the discount beats the value of the cash.
What is DPO? Days payable outstanding — the average days to pay suppliers; higher DPO frees cash but can strain supplier relations.
Related: Accounts receivable · Working capital · Cash flow Reviewed: 2026-08-02 · Sources: accounting & treasury canon