What a purchase order actually is, when small businesses genuinely need one, and how to raise one properly.
What a purchase order actually does
It’s a formal, documented commitment to buy specific goods or services at an agreed price — issued by the buyer before the supplier delivers, creating a clear paper trail both sides can refer back to.
When you genuinely need one
Larger or repeat orders, anything with multiple stakeholders needing to track spend, or any purchase where clear documentation matters for accounting or dispute purposes — for a simple one-off small purchase, a PO is often unnecessary overhead.
What makes a good one
Clear item descriptions, agreed price, delivery date, and a unique reference number that both sides can track the transaction against later.
Raise a professional purchase order with the Payslp Purchase Order Generator.
What happens if work is delivered without a PO
Disputes over price or scope are far more common without a documented PO — worth establishing a simple internal rule (for example, any purchase above a set value requires one) rather than deciding case by case.
Frequently asked questions
Is a purchase order legally binding?
Generally yes, once accepted by the supplier — functioning similarly to a contract for that specific transaction.