A reorder point is the minimum inventory level at which a replenishment order should be triggered to avoid running out of stock. It is typically calculated using average daily usage, supplier lead time, and safety stock. Setting accurate reorder points helps businesses prevent costly stockouts while minimizing excess inventory and storage costs.
Reorder points are a core component of inventory management and supply chain planning across warehousing, ecommerce, retail, manufacturing, and wholesale distribution operations.
A reorder point acts as an inventory threshold. When available inventory falls to the predetermined level, the business places a new purchase order or production order to replenish stock before inventory is depleted. The goal is to ensure that incoming inventory arrives before existing stock runs out.
Reorder Point = (Average Daily Usage × Lead Time) + Safety Stock
| Component | Description |
| Average Daily Usage | Average number of units sold or used per day |
| Lead Time | Number of days required to receive replenishment inventory |
| Safety Stock | Extra inventory kept to protect against delays or demand spikes |
A company sells an average of 50 units per day and its supplier lead time is 10 days. The company also maintains 200 units of safety stock.
(50 × 10) + 200 = 700
The reorder point would be 700 units. Once inventory reaches that level, a replenishment order should be placed.
Accurate reorder points help businesses:
Several variables can impact reorder point calculations:
Businesses often adjust reorder points dynamically based on real-time inventory and demand data.
| Reorder Point | Safety Stock |
| Inventory level that triggers replenishment | Extra inventory buffer for uncertainty |
| Includes lead time demand plus safety stock | Used to absorb demand or supply variability |
| Operational purchasing threshold | Risk management inventory reserve |
Safety stock protects against uncertainty, while the reorder point determines when to reorder inventory.
Poorly configured reorder points can lead to:
Modern Warehouse Management Systems (WMS) and inventory management software help automate reorder point calculations using real-time demand and inventory data.
A retailer selling consumer packaged goods monitors inventory through its WMS. When stock levels for a fast-selling product fall below the reorder point, the system automatically generates a purchase order to replenish inventory before customer demand exceeds available stock.
Category: Inventory & Order Management
