Kitting

Kitting is the process of grouping, assembling, and packaging multiple individual SKUs together into a single, ready-to-ship unit — known as a kit or bundle — before an order is received. Rather than picking individual components at order time, kitting pre-assembles combinations that are expected to be ordered together, reducing pick time and simplifying fulfillment when those combinations are ordered.

Kitting vs. Bundling vs. Assembly

These related terms have slightly different meanings in practice:

Kitting: Combines existing SKUs into a pre-built unit. No manufacturing or transformation — just grouping and packaging. A "starter kit" with three skincare products in a branded box is a kit.

Bundling: Often used interchangeably with kitting, but may refer more loosely to any combined offering, including virtual bundles where the individual products ship separately.

Light manufacturing / value-added assembly: When components are combined into a new product that didn't exist before — e.g., custom-configured electronics — this crosses from kitting into light manufacturing, which carries different regulatory and accounting implications.

Why Kitting Improves Fulfillment Efficiency

Without kitting, a 3-item bundle order requires 3 separate picks across potentially 3 different bin locations. With pre-built kits, the entire bundle is a single SKU in a single location — one pick, one scan, done.

For e-commerce brands with predictable product combinations (subscription boxes, gift sets, starter packs), kitting eliminates:

• Multiple pick trips per order
• Complex pack-station assembly under time pressure
• Risk of incorrect assembly at time of shipment

Kitting and SKU Proliferation

Kitting adds complexity to inventory management. Each kit is a distinct SKU with its own:

• Storage location
• Inventory level to track
• Reorder point
• Bill of materials (which components and quantities)

When a kit is sold, the WMS or inventory system must "explode" the kit BOM and decrement each component's on-hand quantity. If a kit is un-built (to recover components for individual sale), the system must reverse this process.

3PL Kitting Services

Most third-party logistics providers offer kitting as a value-added service (VAS). Pricing typically includes:

• Kitting fee per unit: $0.50–$3.00 per completed kit depending on complexity
• Materials: Cost of branded boxes, inserts, tissue paper, stickers
• Storage: Monthly storage fee for the pre-built kit SKU

Seasonal kitting (holiday gift sets assembled in November for Black Friday/Cyber Monday) is one of the highest-volume 3PL value-added services, requiring significant advance scheduling and clear BOM specifications.

Virtual Kitting (Digital Bundling)

Platforms like Shopify, Amazon, and Linnworks allow merchants to create "virtual bundles" that exist only as a listing — when the bundle is ordered, the OMS splits it into individual component orders that are fulfilled separately. Virtual kitting adds zero fulfillment complexity but foregoes the efficiency gains of pre-assembly. Best for slow-moving bundles where pre-built kits would accumulate excess inventory.