Template of the Purchase Order

A purchase order (PO) is a formal document issued by a buyer to a supplier, confirming the intention to purchase specific goods or services under agreed terms. It specifies exactly what is being ordered, in what quantities, at what price and where it should be delivered. Once the supplier accepts the PO, it becomes a legally binding agreement between both parties.

What should a purchase order include?

There is no federal format requirement for purchase orders in the US, but a detailed PO prevents misunderstandings, reduces errors and gives both parties a clear reference point for the entire transaction.

Essential information

Document label – "Purchase Order" (clearly marked so it is not confused with an invoice or estimate).
PO number – a unique sequential identifier. This number ties the order to every subsequent document – delivery note, invoice and payment – and is the backbone of three-way matching.
Date of issue – the date the purchase order is created.
Buyer details (Bill to) – your business name, address, contact person, phone and email.
Supplier details – the vendor's business name, address and contact person.
Ship to address – where the goods should be delivered (often different from the billing address, e.g. a warehouse, job site or branch office).
Description of goods or services – a detailed, line-by-line list of what is being ordered. Include product names, SKUs, specifications or any other identifiers that leave no room for ambiguity.
Quantity and unit price – the number of units ordered and the agreed price per unit.
Total amount – the sum of all line items, clearly showing subtotal, any applicable taxes and grand total.

Recommended additional information

Requested delivery date – when you need the goods or services. This sets expectations and gives you grounds to follow up if the delivery is late.
Payment terms – Net 30, Net 60, 2/10 Net 30 (2 % discount if paid within 10 days) or other agreed terms.
Shipping method and carrier – preferred carrier (e.g. UPS, FedEx, LTL freight) and shipping speed if relevant.
Incoterms or FOB point – for domestic shipments, specify FOB Origin (risk transfers to buyer when goods leave the supplier) or FOB Destination (risk stays with the supplier until delivery). For international orders, use the appropriate Incoterm.
Sales tax or tax-exempt status – if your organization is tax-exempt (e.g. non-profit, government, reseller), include your exemption certificate number so the supplier does not charge sales tax.
Terms and conditions – cancellation policy, return/defect procedures, warranty expectations and any penalty clauses for late delivery or non-conforming goods.
Authorized signature – the name, title and signature of the person authorized to approve purchases. Many organizations require this for POs above a certain dollar threshold.

When and why is a purchase order used?

A purchase order is issued by the buyer before goods are shipped or services begin. It formalizes the agreement and creates a traceable paper trail. Common use cases include:

Cost control and budgeting – A PO commits a specific dollar amount before the expense is incurred. This allows your finance team to track committed spend against budgets in real time, preventing overspending before it happens.
Legal protection – Once accepted by the supplier, a PO is a binding contract. It defines what was agreed – scope, quantities, pricing, delivery date – and gives both parties clear grounds if a dispute arises.
Supplier management – POs create a documented history with each vendor. Over time, this data helps you negotiate better terms, evaluate supplier reliability and consolidate purchases.
Audit and compliance – The IRS expects businesses to maintain records that support income and expense items on their tax returns. POs are a key part of that documentation trail, showing that expenses were authorized, received and properly invoiced.

Do sole proprietors and freelancers need purchase orders? For very small businesses or solo operators, formal POs may feel like overkill – and for simple, one-off purchases, they often are. But once you are managing multiple suppliers, recurring orders or any project with a budget, POs quickly pay for themselves in fewer billing disputes, faster payment approvals and cleaner books at tax time.

Set a PO approval threshold – require manager or finance approval for POs above a certain dollar amount (e.g. $500, $1,000 or $5,000 depending on your business size). This prevents unauthorized spending.
Always specify FOB terms – who bears the risk (and freight cost) during shipping is one of the most common sources of disputes. State FOB Origin or FOB Destination clearly on every PO.
Track open POs regularly – an open PO represents committed but unspent money. Review open orders monthly to catch stale or forgotten POs that should be closed or canceled.
Keep POs for at least 3 years – they are part of your IRS-required documentation. If income is underreported by more than 25 %, the retention period extends to 6 years.