For UK businesses looking to create an itemised invoice, ensure you incorporate these crucial components:

  1. Header: your business name, logo, and contact details;

  2. Client Information: include the client's name and contact details;

  3. Invoice Details: provide a unique invoice number, issue date, and payment due date;

  4. Itemised Breakdown: offer comprehensive descriptions, quantities, individual prices, and total costs for each product or service;

  5. Subtotal, Taxes, and Discounts: aggregate the totals, add taxes and apply discounts, then determine the final sum;

  6. Payment Terms: list the total amount due, accepted payment methods, and bank details if necessary;

  7. Additional Notes: include any relevant comments and contact details for questions;

Note: This guide for creating an itemised invoice may need adaptation to suit specific business requirements or UK tax laws.