Split Shipment

A split shipment occurs when a single order or inventory batch is divided into two or more separate deliveries rather than being shipped as one unit. In the context of Amazon FBA, a split shipment happens when Amazon’s inventory placement algorithm directs a seller to send portions of a single shipment plan to different fulfillment centers across the country. Outside of Amazon, the term applies broadly to any situation where a purchase order, container load, or production run is shipped in multiple parts due to production timing, capacity constraints, or logistics strategy.

Split Shipments in Amazon FBA

When an FBA seller creates a shipment plan in Seller Central, Amazon’s system evaluates the SKUs, quantities, and current inventory levels across its fulfillment network. Based on where demand exists and which warehouses have available space, Amazon may split the shipment plan into multiple destinations. A seller shipping 1,000 units of a single SKU might be instructed to send 400 units to a warehouse in California, 350 to one in Texas, and 250 to one in New Jersey.

This creates operational complexity. Instead of packing one shipment and booking one carrier, the seller must pack three separate shipments, generate three sets of labels, and arrange three deliveries. The per-unit shipping cost increases because each partial shipment is smaller and may not qualify for the volume discounts available on a single larger load.

Amazon offers an Inventory Placement Service (also called the partial shipment option in newer enrollment settings) that allows sellers to send all inventory to a single fulfillment center. Amazon then handles the redistribution internally. This service carries a per-unit fee, typically $0.30 to $0.40 per standard-size unit, which many sellers find worthwhile compared to the cost and labor of managing multiple shipments themselves.

Split Shipments in International Freight

In international trade, split shipments arise when a supplier cannot complete an entire order at once. A factory producing 10,000 units might ship 6,000 units in the first container when they are ready and the remaining 4,000 units two weeks later in a second container. This is common when production runs into delays, raw material shortages, or quality issues with part of the batch.

Split shipments from international suppliers create several complications. Each shipment requires its own bill of lading, customs entry, and duty payment. The freight cost per unit is higher because neither container is fully loaded. Inventory planning becomes more difficult because the seller must track two separate shipments with different arrival dates.

Letters of credit and other payment instruments may need to explicitly allow partial shipments. Under UCP 600 (the rules governing documentary credits), partial shipments are permitted unless the credit specifically prohibits them. However, each partial shipment must present its own complete set of documents, increasing administrative work and the risk of document discrepancies.

Managing Split Shipments Effectively

For FBA sellers, working with a prep center that handles multi-destination shipment plans reduces the operational burden. The seller ships all inventory to the prep center in one consolidated delivery. The prep center then sorts, labels, and ships to each Amazon-designated fulfillment center according to the shipment plan. This approach keeps the seller’s inbound logistics simple (one destination) while the prep center manages the split.

For international orders, sellers should negotiate with suppliers to avoid unnecessary splits. Requiring the factory to hold partial production until the full order is complete reduces shipping costs and simplifies customs processing. However, this must be balanced against the cost of delayed inventory, especially if the product is in high demand and every week of delay means lost sales.

Tracking split shipments requires clear documentation. Each partial shipment should have its own purchase order number or suffix (PO-1001A, PO-1001B) to avoid confusion during receiving. The total order quantity should be reconciled only after all splits have arrived, with any shortages documented against the specific split where they occurred.