What is an accounts payable aging report?

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An accounts payable aging report is a financial document that categorises a company's outstanding supplier invoices by how long they have been unpaid. Invoices are typically grouped into buckets: current (not yet due), 1–30 days overdue, 31–60 days, 61–90 days, and 90+ days.

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It is one of the most important tools in AP management — giving finance teams a clear picture of what is owed, to whom, and whether payments are running on time.

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Why it matters

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Left unmonitored, AP aging problems compound quickly. Invoices sitting in the 60+ day bucket may have already triggered supplier penalties or damaged vendor relationships. Invoices in the 90+ bucket are often signs of a process failure: a missing approval, a disputed amount, or an invoice that was never properly received into the system.

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The AP aging report also feeds directly into cash flow planning. A finance team that knows exactly when liabilities are due can manage outflows more precisely and avoid surprises at period end.

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What to watch for

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The most common red flags in an AP aging report are: a growing 60+ day bucket, invoices that keep rolling from one period to the next without resolution, a high volume of unapproved invoices sitting in queue, and supplier statements that don't reconcile to internal records.

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For enterprise finance teams running across multiple entities or currencies, maintaining a clean AP aging report manually is extremely difficult. Automation allows aging to be tracked in real time, with exceptions surfaced automatically before they become overdue.

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Related: Accounts Payable (AP) · AP Automation · Days Payable Outstanding (DPO) · Procure-to-Pay (P2P)