Quote vs Purchase order: what each one is for
The quote states what the seller will supply and at what price, before any commitment. The purchase order commits the buyer to purchase specific goods or services at agreed prices and terms. Put side by side, the two documents have different senders, different moments and different legal weight, and this page walks through each difference with a worked scenario.
Side by side
| Quote | Purchase order | |
|---|---|---|
| Issued by | the seller | the buyer |
| Sent to | the buyer | the seller |
| Stage in the flow | 1 — offer | 3 — commitment |
| What it does | states what the seller will supply and at what price, before any commitment | commits the buyer to purchase specific goods or services at agreed prices and terms |
| Commitment | offer only | binding once accepted |
| Requests payment? | no | no |
| Proves delivery? | no | no |
| In the accounts | not recorded in the books; it is a pre-sale document | a commitment, recorded as an open PO, not yet a liability |
| Lifetime | carries an expiry date, typically 14 to 30 days | stands until fulfilled, cancelled or its delivery date passes |
| Make one with | Quotation Maker | Purchase Order Generator |
The deciding difference
The quote comes from the seller, the purchase order from the buyer, and the PO is usually the buyer's formal acceptance of the quote. A seller who starts work on a quote alone has no order; a buyer who issues a PO without a quote has committed to prices nobody agreed.
Legal weight is the cleanest separator. The quote is offer only: An offer the seller stands behind until its expiry date; nothing is owed by either side until the buyer accepts it. The purchase order is binding once accepted: Once the seller accepts it, the PO is a contract to buy the listed goods at the listed prices; it is not itself a demand for money.
Where each one sits in the flow
The quote is issued at stage 1 and the purchase order at stage 3 of the eight-step order-to-cash sequence. The steps between them, if any, are the documents that normally connect the two:
- 1. Quote (this page) — The seller's priced offer, valid until a stated date.
- 2. Sales order — The seller's confirmation that an order is accepted and will be fulfilled.
- 3. Purchase order (this page) — The buyer's formal order: what, how many, at what price, delivered where and when.
Steps before the quote and after the purchase order are on the business documents hub, which shows the full eight-step sequence with a checklist for every document.
Worked scenario
Northgate Joinery quotes Harbour Café $2,220 for twelve oak worktops. Harbour's operations manager raises PO-2026-0142 referencing quote Q-2026-0087, with a delivery address and a date. That PO is the moment a contract exists: Northgate can now buy the timber knowing the order is real, and Harbour's accounts team will only pay an invoice that quotes PO-2026-0142.
Can one replace the other?
You cannot use a quote as a purchase order or the reverse: they are addressed to different questions. The quote answers "what would this cost me?"; the purchase order answers "what exactly did the buyer authorise?". A document that tries to answer both usually answers neither clearly.
Numbering and matching
Give each its own sequence and never share numbers between them. For the quote: Numbered so an accepted quote can be referenced on the order and the invoice that follow. For the purchase order: The buyer's number; suppliers are expected to quote it on the delivery note and the invoice so accounts payable can match the three documents.
Common mistakes
The mistake we see most with the quote is treating a quote as an order and starting work before the buyer has accepted it in writing. With the purchase order it is paying an invoice that has no matching purchase order, which is how duplicate and unauthorised spend slips through. Both come from treating the document as paperwork rather than as a record with a job.
Checklists: what to include in a quote and what to include in a purchase order.