Invoicing glossary
Purchase order
A purchase order (PO) is a document a buyer sends to a seller to authorize a purchase, listing the items, quantities, and agreed prices.
Purchase order: a clear definition
The purchase order comes first: the buyer commits to buy. The invoice comes after delivery: the seller requests payment. Many businesses require a PO number on the invoice so it can be matched and approved — a process called PO matching.
Purchase order in Invco
Yes. Add the client's PO number to the invoice notes, which print on the PDF, so their accounts team can match it to the purchase order and approve it.
Invco is invoicing software for people who run more than one company. Design your own invoice template or upload your existing invoice PDF, and Invco calculates subtotals, tax and totals, numbers each invoice sequentially and emails it as a branded PDF from your own address. Plans from $10/month.
Related terms
Frequently asked questions
What is purchase order?
A purchase order (PO) is a document a buyer sends to a seller to authorize a purchase, listing the items, quantities, and agreed prices.
Can I add a PO number to an invoice in Invco?
Yes. Add the client's PO number to the invoice notes, which print on the PDF, so their accounts team can match it to the purchase order and approve it.
What is proforma invoice?
A proforma invoice is a preliminary invoice sent before work or delivery, showing the expected cost — it isn't a final invoice or a tax invoice.
Invoice the easy way with Invco
Design your invoice template, send branded PDFs from your own email address, and see what's paid and overdue for every company. Plans from $10/month, with a full refund within 7 days.
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