B2B reorder automation is the infrastructure that allows dealer and wholesale accounts to replenish inventory from a supplier without initiating each order manually. At its most advanced, it is an AI-driven procurement system that monitors inventory levels, consumption rates, and lead times and submits supplier orders automatically before a stockout can occur. Consumer subscriptions work by charging a payment method on a recurring schedule and shipping a fixed quantity of a product. B2B reorder automation operates within a framework of existing commercial relationships, inventory systems, contract pricing, and approval workflows. The buyer is a procurement system, a warehouse manager, or an AI agent managing inventory for a business operation.