The Office Invoice is a fundamental business document used in Hong Kong's commercial environment to formalize requests for payment for goods or services rendered. It serves multiple purposes: as a legal record of the transaction, a tax document for compliance with the Inland Revenue Ordinance, and an accounting document for both the issuing and receiving parties. The document must include specific information required by Hong Kong law, such as business registration numbers, clear itemization of goods or services, and applicable tax details. Office Invoices are essential for maintaining accurate financial records, facilitating payment processing, and ensuring compliance with local tax and business regulations. They form part of the official business documentation required to be maintained for at least seven years under Hong Kong law.

1. Invoice Header: Company logo, name, address, contact details, and business registration number

2. Invoice Details: Invoice number, date, payment due date, and reference numbers

3. Client Information: Client's name, address, and contact details

4. Item Description: Detailed list of products/services with descriptions, quantities, and unit prices

5. Calculation Section: Subtotal, applicable taxes, discounts, and total amount

6. Payment Information: Payment terms, accepted payment methods, and banking details

7. Footer: Legal notices, terms of payment, and company contact information