Blanket Purchase Order

A blanket purchase order (BPO), also called a standing purchase order or standing order, is a long-term procurement agreement between a buyer and a supplier for the recurring supply of specified goods or services over a set period, typically 12 months, at agreed pricing. Rather than raising a new purchase order for every transaction, individual releases or call-offs are made against the blanket order up to an agreed total value.

When to Use a Blanket Purchase Order

Blanket POs suit situations where you buy the same or similar items from the same supplier repeatedly - consumables, regularly restocked materials, or recurring services. Common examples include: electrical consumables ordered from a merchant account on a weekly basis, blank garments from a preferred supplier restocked as stock levels fall, or recurring van stock replenishment for a trade business.

The blanket PO establishes the pricing, payment terms, and product specifications upfront. When stock is needed, a call-off is made against the blanket order - the buyer references the BPO number and specifies quantity and delivery date. This compresses the procurement cycle because the commercial terms are already agreed, and it protects against mid-year supplier price increases for the duration of the agreement.

Blanket Purchase Order vs Standard Purchase Order

A standard purchase order covers a single transaction - one order, one delivery, one invoice. A blanket PO covers multiple transactions over time under one agreement. The total blanket value is approved upfront, but individual call-offs are made as required rather than all at once.

The practical difference matters for procurement control. With individual POs per transaction, each order requires a new approval cycle. With a blanket PO, the approval is done once for the period - individual releases happen faster because the commercial authority is already in place. This is useful for businesses with high transaction volumes against a small number of core suppliers, where raising and approving a new PO for every delivery adds administration without adding control.

A blanket PO is not appropriate for bespoke or project-specific items where specifications change with each order, or for one-off purchases. For those, standard job-linked purchase orders with confirmed pricing per transaction remain the right approach.