Purchase Order vs Invoice vs Receipt: The Difference
Jul 10, 2026
Jul 10, 2026
Convert a purchase order to Excel, CSV, or JSON
Submit your purchase orders
Drop documents here, or click to file
Up to 50 files per batch
Uploading...
A purchase order is issued by the buyer before anything is delivered and says what they intend to buy. An invoice is issued by the seller after delivery and requests payment. A receipt is issued after payment and proves the money changed hands. The order is always the same: purchase order, then invoice, then receipt. Buyer, seller, seller.
Last updated July 2026.
These three documents get confused constantly, mostly because "receipt" means two different things in a business context. The tool above reads the first of them, extracting the PO number, vendor, and line items from any supplier purchase order in about ten seconds, which is what the other two eventually get compared against.
| Purchase order | Invoice | Receipt | |
|---|---|---|---|
| Who creates it | The buyer | The seller | The seller |
| When | Before delivery | After delivery | After payment |
| What it says | "I want to buy this, at this price" | "You owe me this, by this date" | "You have paid, we are square" |
| Creates an obligation | Yes, once accepted | Yes, a payable | No, it closes one |
| Journal entry | None | Dr expense/inventory, Cr AP | Dr AP, Cr cash |
| Carries a payment due date | Payment terms, not a due date | Yes | No |
| Used in the three-way match | Yes | Yes | No, the goods receipt is |
A facilities manager needs 40 office chairs. Here is what each document does and when.
The purchase order. She raises a PO to the supplier: 40 chairs, model number, $180 each, delivery to the Denver office by the 20th, Net 30 terms. She sends it, the supplier accepts it, and at that moment there is an agreement about what will be delivered and what it will cost. Nothing has been paid and nothing has hit the general ledger. What exists is a commitment against her budget.
The delivery, and the goods receipt. The chairs arrive on the 19th. Somebody at the dock counts 38, not 40, and records what was actually received. This internal document is the goods receipt note, and it is the one people mean when they say "receipt" inside a procurement conversation. It is not a proof of payment.
The invoice. The supplier bills for what they shipped: 38 chairs at $180, due in 30 days. Accounts payable compares three things, the PO, the goods receipt, and the invoice, and confirms they agree on quantity and price. That comparison is the three-way match. The invoice creates a payable in the books.
The receipt. Thirty days later the payment goes out and the supplier issues a receipt confirming they got the money. The payable is cleared. This document is proof of payment, and its main job is record keeping, for the buyer's expense records and the seller's.
"Receipt" means two different things. A goods receipt (or goods receipt note) records that items physically arrived and in what quantity. A payment receipt records that money was transferred. The first sits between the PO and the invoice. The second comes after everything. Calling them both "the receipt" in the same sentence is how three-way matches get explained wrong. The goods receipt note guide covers the first in detail.
Invoices and receipts both list what was bought. The difference is tense. An invoice looks forward: here is what you owe, pay by this date. A receipt looks backward: here is what you paid. If a document has a due date and payment instructions, it is an invoice. If it says paid, with a date and a method, it is a receipt.
A retail till slip is both at once. Buy a laptop at a store and the slip you get is a receipt, because you paid at the same moment you took delivery. There was never a gap for an invoice to fill. This is why consumers rarely encounter the distinction and business buyers cannot avoid it. The three documents only separate when there is time between agreeing, receiving, and paying.
An invoice does not always need a PO. Plenty of small suppliers invoice with no purchase order behind it. That is called a non-PO invoice, and it is precisely the situation PO controls exist to reduce, because nobody agreed to the price in advance.
Each document is a control on the one before it. The purchase order fixes the price before the supplier has any leverage. The goods receipt confirms you actually got what you agreed to buy. The invoice is checked against both before a dollar moves. The payment receipt closes the loop.
Break the sequence and the controls stop working. Pay from an invoice with no PO and you have no agreed price to check it against. Skip the goods receipt and you are paying for 40 chairs when 38 arrived. Almost every duplicate payment and overbilling story starts with one of these documents missing.
This is also why the PO is worth capturing properly as data rather than as a PDF in an inbox. It is the reference point for everything after it. When the invoice comes in at $190 a chair, the only thing that proves it should have been $180 is the purchase order. Line-level differences like that become a purchase price variance, and if the goods arrived before the invoice, they sit in a purchase order accrual until it does.
The practical problem is that all three arrive as PDFs, and the PO is the one your own team issued and then loses track of. Purchase order line item extraction turns each order into rows carrying the SKU, quantity, and unit price that the invoice will eventually be checked against. Accounts payable teams doing that comparison at volume start at purchase order extraction for accounts payable, clear a backlog with bulk purchase order upload, and route the output through the PDF to Excel converter or into the ledger with purchase order to QuickBooks.
The last document in the chain has its own reconciliation problem. Payment receipts prove money left, but confirming it actually did means matching them against the bank, and turning the statement into a spreadsheet is usually the first step in that reconciliation.
A purchase order is created by the buyer before delivery and states what they intend to purchase and at what price. An invoice is created by the seller after delivery and requests payment. A receipt is created by the seller after payment and confirms the money was received. The buyer writes one document, the seller writes two.
The purchase order comes first, always. It is issued before goods or services change hands and sets the agreed price and quantity. The invoice comes after delivery and asks for payment against that agreement. An invoice that arrives with no purchase order behind it is called a non-PO invoice.
No. An invoice requests payment and carries a due date and payment terms. A receipt confirms payment already happened and carries a payment date and method. They often list the same items, but an invoice creates a liability while a receipt closes one. A retail slip looks like both because payment and delivery happen simultaneously.
The buyer issues the purchase order. The seller issues both the invoice and the payment receipt. The goods receipt, which records that items physically arrived, is issued internally by the buyer's receiving team and is a separate document from the seller's payment receipt.
A purchase order becomes legally binding once the supplier accepts it. On its own it is an offer to buy on stated terms. Once accepted, both parties are bound to the quantities, prices, and terms on the document, which is why the price on the PO is the reference point when an invoice disagrees with it.
A goods receipt note is an internal document recording what physically arrived and in what quantity, created by the buyer's receiving team. It is not the same as a payment receipt, which is issued by the seller to confirm payment. The goods receipt note is the third document in a three-way match, alongside the purchase order and the invoice.
No, but the buyer's policy often requires one. An invoice with no matching purchase order is a non-PO invoice, and it usually gets slower approval because nobody agreed the price in advance. Companies that want spend control require a PO before any invoice will be paid.
The purchase order, the goods receipt, and the supplier invoice. Accounts payable confirms all three agree on quantity and price before releasing payment. The payment receipt is not part of the match, because it is only produced after the payment has already been made.
If you only need the two-document comparison, purchase order vs invoice goes deeper on that pair, and purchase order vs sales order covers the buyer-side and seller-side versions of the same order. For the field-by-field anatomy of a PO, see purchase order fields, and for how the documents move through a business, the purchase order process.
PurchaseOrders reads purchase orders and returns structured data. It does not create invoices, issue receipts, or perform the three-way match. Those stay in your accounting system, working from data that did not have to be typed in first.