"Invoice" means a commercial document a seller issues to a buyer requesting payment for goods or services delivered. It records what was supplied, the price, the GST treatment, and the payment terms. The word comes from the French "envois", meaning "items sent".
An invoice typically means:
Invoices are different from receipts: an invoice asks for payment, a receipt confirms payment has been made. They're also different from quotes (an estimate before work) and statements (a summary of multiple invoices). In Australia, GST-registered businesses must issue "tax invoices" — the same document with extra fields required by the ATO. Invoices are the foundation of business bookkeeping and are required for income reporting, BAS, and tax records. InvoiceSonic generates professional invoices in under two minutes for free.
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