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Free Purchase Order Template

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What Is a Purchase Order?

A purchase order (PO) is a document a buyer sends to a vendor to formally request goods or services. It commits the buyer to a specific list of items, quantities, prices, and delivery terms. Once the vendor accepts the PO, it becomes a legally binding contract between both parties.

  • Buyer creates the PO — listing what they want, at what price, by when
  • Vendor accepts — by acknowledging receipt or by fulfilling the order
  • Goods or services are delivered — referencing the PO number
  • Vendor invoices against the PO — the invoice references the PO number for matching

POs are widely used in B2B procurement, especially in enterprises where every purchase must be authorised before the supplier ships or starts work.

Purchase Order vs Invoice — Who Sends What

POs and invoices are often confused because they look similar. The key difference is direction:

  • Purchase order: Sent by the buyer to the vendor — "Please supply us with these items at these prices."
  • Invoice: Sent by the vendor to the buyer — "Here is the bill for what we supplied. Please pay."

In a typical procurement cycle, the PO comes first (authorising the spend), goods or services are delivered, and the invoice follows (requesting payment). The buyer's accounts payable team matches the invoice against the PO before approving payment — a process called "PO matching" or "3-way matching" (PO + goods receipt + invoice).

Required Fields on a Purchase Order

A complete PO contains:

  • PO number — your unique reference (e.g., PO-2025-0042) — vendors will use this on their invoice
  • Issue date and required delivery date
  • Buyer details — your company name, address, contact person, billing address
  • Vendor details — supplier name and address
  • Ship-to address — if different from the billing address
  • Itemised line items — description, SKU or product code, quantity, unit price, line total
  • Subtotal, applicable taxes (VAT/sales tax), shipping, and grand total
  • Payment terms — Net 30, Net 60, etc., agreed in advance
  • Delivery terms / Incoterms for international orders (EXW, FOB, DDP)
  • Authorised signatory — the person approving the spend

How to Use This Template

invoicePrivate generates POs using the same editor as invoices — just change the document label. Steps:

  1. Open the editor and set the document type to "Purchase Order"
  2. Enter your company details as the buyer and the supplier details as the vendor
  3. Assign a sequential PO number
  4. Add line items with quantities, unit prices, and tax rates
  5. Set the required delivery date and payment terms in the notes
  6. Download the PDF and send it to your vendor

Your PO data stays on your device — no server, no account, no third-party access. Save it locally to reference when matching the supplier's invoice later.

Frequently Asked Questions

Is a purchase order legally binding?

A PO becomes legally binding once the vendor accepts it — either explicitly (by acknowledging) or implicitly (by starting to fulfil the order). The PO and acceptance together form a contract on the terms stated in the document.

Do small businesses need to use POs?

Not always — for small, one-off purchases an invoice alone is often sufficient. But POs become essential when (a) you have multiple people who can spend, (b) you need a paper trail for audit, or (c) your suppliers require a PO number on every invoice. Many enterprise clients refuse to pay invoices that lack a PO reference.

How do I number purchase orders?

Use a sequential numbering scheme such as PO-2025-001, PO-2025-002. Many businesses include the year and department code (e.g., PO-MKT-2025-014). Once you choose a scheme, stay consistent — gaps in numbering create audit issues.

Can I convert a purchase order into an invoice?

No — the buyer issues the PO; the vendor issues the invoice. But the vendor will typically copy the PO line items into their invoice and reference the PO number. In invoicePrivate, you can duplicate any document and switch the type, which is useful if you are both buying and selling.

What is the difference between a PO and a quote?

A quote is sent by a vendor offering to supply at a price. A PO is sent by a buyer committing to purchase at a price. Often a buyer requests a quote, receives it, and then issues a PO referencing the accepted quote.

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