An effective invoice should include the following details:
1. Business Information: Name, address, and contact details of your business. 2. Client Information: Name, address, and contact details of the client. 3. Invoice Number: A unique identifier for the invoice. 4. Date: Date of the invoice and the due date for payment. 5. Description of Goods/Services: Detailed list of products or services provided. 6. Amount Due: Total amount payable, including any applicable taxes. 7. Payment Terms: Methods of payment accepted and terms of payment.