What is invoice aging?

Invoice aging is the classification of outstanding invoices by how overdue they are relative to their due date. The standard buckets are current, 1 to 30 days past due, 31 to 60, 61 to 90, and over 90. The resulting report is the AR aging report — the single most used tool in receivables management. It shows not just that money is owed, but how urgently each balance needs attention, since recovery probability drops significantly in each successive bucket.

The aging report is useful only if it is acted on. Businesses that run it weekly and work the queue by bucket — addressing fresh invoices first and escalating older ones — consistently outperform those that look at the total AR balance and assume old invoices will eventually pay. Recovery rates above 85 percent in the first week past due fall below 22 percent past 90 days.

Invoice aging also provides early warning on trends. A business whose 61-to-90-day bucket is growing month over month is heading into a collection problem even if total revenue is growing. Spotting that trend three months ahead gives meaningful time to adjust credit policy or tighten follow-up.