Invoice
A time-stamped commercial document that itemizes and records a transaction between a buyer and a seller.
Disclaimer: This guide provides general business education. It is not legal or accounting advice.
Definition
An Invoice is a commercial document issued by a seller to a buyer, itemizing a transaction and requesting payment. It outlines the goods or services provided, their prices, and the terms of payment.
Why It Matters
An invoice serves several critical functions for a business:
- Legal Record: It serves as legally enforceable documentation that goods or services were provided and that payment is owed.
- Tax Documentation: Governments and auditors require invoices as proof of revenue and sales tax collection.
- Cash Flow Management: It establishes clear payment terms (e.g., Net 30), allowing businesses to predict when they will get paid.
Practical Example
Key Elements of an Invoice
A legally compliant invoice typically must include:
- The word "Invoice" clearly stated
- A unique invoice number (e.g., INV-1045)
- The date the invoice was issued
- Seller and buyer contact information
- Line items detailing the products/services, quantities, and unit prices
- The subtotal, sales tax, and grand total
- Payment terms and due date
If you are billing clients by the hour and need to calculate your line items, make sure you are charging enough by using our Hourly Rate Calculator.
Frequently Asked Questions
Is an invoice a receipt?
No. An invoice is a request for payment issued before or during the service. A receipt is proof of payment issued after the money has been received.