Last edited 18 May 2018


An invoice is a document issued by a vendor to a purchaser, setting out the products or services that they have purchased (or have agreed to purchase) and the amount that is payable.

invoices can be sent before or after the delivery of products or services, and typically include a payment due date. An invoice can also be sent after a purchase order has been agreed.

Once it has been agreed, an invoice is a legally-binding document, detailing a debt owed by the purchaser to the vendor.

The information set out on an invoice will typically include:

  • Date that the invoice was created.
  • Names and addresses of customer and supplier.
  • Description of items or services purchased.
  • Prices and any added VAT.
  • Terms of payment (i.e. how long the purchaser has to pay the invoice).
  • Payment method (such as bank account details).

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