What to Include in an Invoice

An invoice should include everything the client needs to identify the charge, approve it, and pay it without coming back with questions. Missing fields are the most common cause of payment delays.

Include these fields in every invoice:

  • The word "Invoice" or "Tax Invoice" (if you're GST registered)
  • Your business name, ABN, and contact details
  • Your logo (optional but professional)
  • A unique sequential invoice number
  • The date the invoice was issued
  • The client's name and billing address
  • A line-by-line description of goods or services with quantity, rate, and line total
  • Subtotal, any GST or tax, and the grand total
  • Payment due date and payment methods (bank, BPAY, PayID, credit card link)
  • A purchase order or project reference, if applicable
  • An optional thank-you note or payment terms in the footer

For Australian tax invoices of $1,000 or more, also include the buyer's identity or ABN. Always save invoices as PDFs before sending — PDFs preserve formatting on any device. InvoiceSonic's templates include every recommended field by default.

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