An invoice is a commercial document issued by a seller to a buyer that itemizes products or services delivered, states the total due, and sets out payment terms and due date.
Why it matters
Invoices create a record for both sides, support bookkeeping and tax reporting, and start the payment clock. Clear invoices get paid faster and reduce disputes. Required content, such as tax numbers, differs by country, so check local rules. Many businesses issue invoices through accounting software that numbers them automatically, records payments and sends reminders when a due date passes.
Example
An invoice numbered INV-0042 dated 1 March lists 10 hours of design at 40 USD each, 400 USD in total, with payment terms of net 15, meaning payment is due 15 days after the invoice date.
Common mistakes
- Leaving out the invoice number, date or payment terms.
- Confusing an invoice with a receipt, which confirms payment already made.
- Not following the format your country requires; rules vary.
Related
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