Purchase Order
A purchase order (PO) is a formal document a buyer sends to a seller to request specific goods or services at an agreed price. It becomes a legally binding contract once the seller accepts it. Purchase orders specify quantities, descriptions, prices, delivery dates, and payment terms — keeping both
Purchase Order Definition
A purchase order (PO) is a formal document a buyer sends to a seller to request specific goods or services at an agreed price. It becomes a legally binding contract once the seller accepts it. Purchase orders specify quantities, descriptions, prices, delivery dates, and payment terms — keeping both parties aligned and accountable.
Purchase Order in Practice — Example
A craft brewery needs 500 pounds of hops from a supplier. The brewery's purchasing manager creates a purchase order listing the hop variety, quantity, price per pound ($12), delivery date, and payment terms (Net 30). She sends it to the supplier, who reviews and accepts it. When the hops arrive, the brewery matches the delivery against the PO to confirm everything is correct before approving the supplier's invoice for payment.
Why Purchase Order Matters for Your Business
Purchase orders bring structure to your buying process. Without them, you're relying on emails, verbal agreements, and memory — which creates confusion, disputes, and accounting headaches. POs create a paper trail that protects you if a supplier delivers the wrong items, overcharges, or misses a deadline.
For growing businesses, purchase orders are essential for budget control. They let you track committed spending before invoices arrive, so you always know what you owe. Lenders and investors also appreciate seeing organized purchasing processes — it signals financial discipline.
How Purchase Order Works
| Step | Action |
|---|---|
| 1. Request | Department identifies a need and submits a purchase request |
| 2. Approval | Manager or owner approves the purchase |
| 3. PO Created | A numbered purchase order is generated |
| 4. Sent to Supplier | Supplier receives and accepts the PO |
| 5. Goods/Services Delivered | Supplier fulfills the order |
| 6. Three-Way Match | PO is matched against delivery receipt and invoice |
| 7. Payment | Invoice is approved and paid per the agreed terms |
Key PO details:
Purchase Order vs Invoice
A purchase order is issued by the buyer before goods are delivered — it says "I want to buy this." An invoice is issued by the seller after goods are delivered — it says "You owe me this." The PO comes first, the invoice comes second, and payment follows the invoice.
FAQ
Q: Do small businesses really need purchase orders?
A: If you're regularly ordering from suppliers, yes. POs prevent misunderstandings, help with budgeting, and create records needed for tax and audit purposes. Even a simple PO system saves headaches.
Q: Is a purchase order a contract?
A: Yes, once accepted by the seller. It becomes a binding agreement for both parties to fulfill the terms specified in the PO.
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