The Letterhead Invoice is a fundamental business document used across Hong Kong's commercial landscape to request payment for goods or services while maintaining professional branding standards. It serves multiple purposes: as a formal payment request, a tax document for compliance with Hong Kong's Inland Revenue Ordinance, and a record-keeping tool for both issuer and recipient. This document type must include the company's business registration number as required by Hong Kong law, along with other mandatory elements such as invoice numbers, dates, and payment terms. A Letterhead Invoice differs from standard invoices by incorporating corporate branding elements and letterhead design, making it particularly suitable for professional services firms and businesses wanting to maintain brand consistency in their documentation. It can be issued both electronically and in hard copy, subject to the Electronic Transactions Ordinance of Hong Kong.

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

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

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

4. Items/Services List: Detailed breakdown of goods/services provided, including quantities, unit prices, and descriptions

5. Total Amount: Subtotal, any applicable taxes, and final total amount

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

7. Footer: Standard terms and company contact information