What Is a Backorder? A Simple Guide for Warehousing and Logistics

No matter how carefully a company plans its inventory, there are times when customer demand exceeds the available stock. Instead of rejecting customer orders, many businesses choose to accept the orders and fulfill them later when inventory becomes available. This process is known as a Backorder.

Backorders are common across e-commerce, wholesale distribution, manufacturing, and retail industries. While they may indicate temporary inventory shortages, they also allow businesses to continue generating sales and serving customers without losing future revenue.

When managed properly, backorders can improve customer retention, increase sales opportunities, and provide greater flexibility in inventory planning. However, poor backorder management can lead to delayed deliveries, dissatisfied customers, and operational inefficiencies.

In this article, we'll explain what a Backorder is, why it is important, its key features, advantages, and the common scenarios where it is used.

What Is a Backorder?

A Backorder is a customer order that cannot be fulfilled immediately because the requested product is temporarily out of stock. Instead of canceling the order, the company accepts it and promises to ship the product once inventory becomes available.

Unlike a canceled order, a backorder remains active in the system until the required inventory is received and shipped.

For example, a warehouse currently has zero units of a popular product. A supplier is scheduled to deliver 500 new units next week. Instead of refusing customer orders during this period, the company continues accepting orders and places them on backorder. Once the replenishment arrives, the warehouse fulfills the oldest backorders first.

Backorders allow businesses to continue selling products even during temporary stock shortages.

Why Is Backorder Important?

Backorders provide a balance between customer demand and inventory availability.

Without a backorder process, companies would have to reject every order whenever inventory reaches zero, potentially losing customers and future sales.

A well-managed backorder process helps businesses:

• Continue accepting customer orders
• Protect future revenue
• Improve customer retention
• Utilize incoming inventory efficiently
• Maintain stronger supplier relationships

Many industries with long production lead times or unpredictable demand rely heavily on backorders as part of their normal operations.

Key Features of Backorder

Although implementation varies between organizations, most backorder processes share several common characteristics.

Inventory Shortage Detection

Backorders are automatically created when available inventory is insufficient to fulfill an order.

Modern Warehouse Management Systems (WMS) and Order Management Systems (OMS) can detect shortages in real time.

Order Retention

Instead of canceling the order, the system keeps it open until inventory becomes available.

The customer maintains their place in the fulfillment queue.

Future Inventory Allocation

Incoming inventory from suppliers or manufacturing is automatically allocated to outstanding backorders according to predefined business rules.

Many companies follow a First-In, First-Out (FIFO) allocation strategy.

Customer Communication

Successful backorder management includes notifying customers about:

• Expected shipping dates
• Inventory availability
• Shipment updates
• Possible delays

Transparent communication helps maintain customer satisfaction.

System Integration

Backorders are often managed across multiple business systems, including:

• Warehouse Management System (WMS)
• Enterprise Resource Planning (ERP)
• Order Management System (OMS)
• E-commerce platforms
• Supplier management systems

This ensures inventory information remains synchronized throughout the supply chain.

Advantages of Using Backorders

Prevents Lost Sales

Customers can still place orders even when products are temporarily unavailable.

Instead of losing revenue, businesses capture future demand.

Improves Customer Retention

Customers who are willing to wait often prefer placing a backorder rather than searching for another supplier.

Supports Better Inventory Planning

Backorder volumes provide valuable insights into demand patterns and inventory shortages.

Businesses can use this information to improve future forecasting.

Maximizes Product Availability

Rather than displaying "Unavailable," businesses can continue selling products with estimated delivery dates.

Reduces Overstock Risk

Instead of maintaining excessive safety stock, companies can balance inventory investment with controlled backorder management.

Common Scenarios for Backorders

E-commerce

Online retailers frequently allow customers to purchase products that are temporarily out of stock when replenishment is expected soon.

Manufacturing

Manufacturers often accept backorders for customized or made-to-order products with longer production lead times.

Wholesale Distribution

Distributors allocate incoming inventory to backorders before accepting new customer requests.

Seasonal Products

Demand for seasonal items can exceed inventory during peak periods.

Backorders help businesses continue accepting customer orders until replenishment arrives.

New Product Launches

Popular new products often sell out quickly.

Backorders allow companies to continue collecting orders while waiting for additional production.

Supply Chain Disruptions

Supplier delays, transportation disruptions, or unexpected demand spikes may create temporary shortages.

Backorder management helps businesses continue operating during these situations.

Backorder vs. Out of Stock

Although these terms are often used together, they have different meanings.

| Feature | Backorder | Out of Stock | | ----------------------------- | ----------------- | ------------------------ | | Customer Can Place Order | Yes | Usually No | | Inventory Available | No | No | | Future Replenishment Expected | Yes | Unknown or Not Available | | Order Remains Active | Yes | No | | Estimated Delivery Date | Usually Available | Often Unavailable |

In simple terms, "Out of Stock" means a product cannot currently be purchased, while "Backorder" means customers can still place an order and receive the product later.

Best Practices for Managing Backorders

To maximize customer satisfaction and operational efficiency, businesses should follow several best practices:

• Display accurate inventory availability online.
• Provide realistic estimated shipping dates.
• Prioritize backorders based on business rules such as FIFO.
• Automatically notify customers about order status changes.
• Continuously monitor supplier lead times.
• Improve demand forecasting using historical backorder data.
• Integrate WMS, ERP, OMS, and purchasing systems for real-time inventory synchronization.

Modern warehouse and order management systems can automate much of the backorder process, reducing manual work while improving inventory visibility and customer communication.

Conclusion

A Backorder is more than simply delaying a shipment—it is a strategic inventory management practice that allows businesses to continue accepting customer orders during temporary inventory shortages.

By combining accurate inventory visibility, automated allocation, proactive customer communication, and effective replenishment planning, backorders help companies reduce lost sales, improve customer retention, and optimize inventory investment.

Whether you operate an e-commerce warehouse, a manufacturing facility, a wholesale distribution center, or a third-party logistics business, implementing a well-designed backorder process is an essential part of delivering reliable customer service and building a resilient supply chain.