Perpetual Inventory

Perpetual inventory is an accounting and operations method that updates inventory records continuously as goods are received, moved, or shipped. Every transaction — a goods receipt, a pick for an order, a transfer between locations, or a return — is recorded immediately in the system. This contrasts with periodic inventory, where stock levels are updated only at scheduled intervals (e.g., monthly or annually).

Perpetual inventory provides real-time visibility into stock levels, enabling accurate order promising, automated reorder triggers, and immediate detection of discrepancies. For businesses selling across multiple channels — website, marketplace, retail — perpetual inventory prevents overselling by maintaining a single, always-current source of truth. In Qatar, where import lead times are long, knowing exact current stock levels is essential for timely reordering.

Perpetual inventory requires a warehouse management system (WMS) or enterprise resource planning (ERP) system, plus transactional discipline — every movement must be recorded. Barcode scanning, RFID, and mobile devices at the point of activity ensure accuracy. Cycle counting serves as a validation mechanism to verify that system records match physical reality.