What is Consignment Inventory? Definition & Manufacturing Examples

What is Consignment Inventory?

Consignment inventory is an arrangement where a supplier places stock at a buyer's (manufacturer's) location, but retains ownership of the inventory until it is consumed in production or sold to an end customer. The buyer does not pay for the inventory at the time of delivery — payment occurs only when the inventory is actually used, typically based on periodic consumption reports.

This arrangement shifts the carrying cost and obsolescence risk from the buyer to the supplier for the period between delivery and consumption. For manufacturers, consignment inventory can significantly improve cash flow and reduce working capital requirements by eliminating the need to purchase and hold large quantities of raw materials or components.

Consignment inventory is common for high-volume, standardized items where demand is relatively predictable but the buyer wants to minimize inventory investment. Fasteners, packaging materials, standard electronic components, cutting tools, MRO supplies, and commodity chemicals are frequently managed through consignment programs.

How Consignment Inventory Works in Manufacturing

A typical consignment inventory arrangement operates as follows:

Agreement setup. The buyer and supplier negotiate a consignment contract that defines which items are consigned, the minimum and maximum stock levels to be maintained, the replenishment process, the consumption reporting method and frequency, payment terms, liability for damage or obsolescence, and the process for returning unused inventory.

Initial stocking. The supplier delivers an initial consignment quantity to the buyer's facility. The inventory is stored in a designated consignment area or mixed with the buyer's own stock (depending on the tracking system).

Consumption and replenishment. As the buyer consumes consignment inventory in production, usage is recorded in the inventory management system. When stock drops to the agreed reorder point, the supplier replenishes automatically — either through vendor-managed inventory or triggered by the buyer's system.

Payment. At agreed intervals (weekly, bi-weekly, or monthly), the buyer reports consumption and pays the supplier for the quantity consumed. Unused inventory remains the supplier's property and no payment is due.

Inventory accuracy. Both parties must maintain accurate records of consignment stock levels. Regular reconciliation — comparing the supplier's records to the buyer's physical inventory — prevents disputes and ensures the system functions correctly.

Consignment Inventory Example

An electronics contract manufacturer consumes 50,000 capacitors per month across multiple product lines. Previously, the manufacturer purchased capacitors in monthly orders of 60,000 units (including safety stock), paying $15,000 per order on net-30 terms.

Under a consignment agreement with the capacitor supplier:

• The supplier maintains 80,000 capacitors at the manufacturer's facility
• The manufacturer reports weekly consumption and pays monthly based on actual usage
• The supplier replenishes twice per week to maintain the agreed stock level

Financial impact for the manufacturer:

• Average consignment inventory at the facility: 65,000 units ($19,500 at cost)
• Previous owned inventory investment: 45,000 units average on hand ($13,500)
• Reduction in owned inventory: $13,500 (the entire balance, since it is now consignment)
• Annual carrying cost savings at 25%: $3,375 per year on this single item
• Cash flow improvement: approximately $13,500 in freed working capital

Scaled across 200 items on consignment programs, the manufacturer frees over $800,000 in working capital and reduces annual carrying costs by more than $200,000.

Why Consignment Inventory Matters for Production Scheduling

Consignment inventory improves production scheduling by reducing material availability risks. When critical components are consigned at the production facility, the scheduler does not need to wait for purchase orders to be placed, approved, and fulfilled. The material is already on site, ready for production.

This is particularly valuable for make-to-order manufacturers who need to respond quickly to customer orders. With consignment materials on hand, lead time is reduced to manufacturing time only — no procurement delay.

Scheduling software like Resource Manager DB can schedule production against consignment inventory with confidence that materials are available, enabling tighter scheduling and faster delivery commitments.

However, schedulers must also manage consignment inventory carefully. If consumption patterns change due to scheduling changes, the consignment stock levels must be adjusted to prevent excess accumulation or unexpected shortages.

Related Terms

• Vendor-Managed Inventory — a supply chain model often combined with consignment where the supplier manages replenishment
• Carrying Cost — the holding costs that consignment shifts from buyer to supplier
• Raw Materials — the inventory category most commonly managed through consignment

FAQ

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This term is part of our Manufacturing & Production Scheduling Glossary. Learn more about inventory management, scheduling, and manufacturing terminology.