Document background
The Retainer Invoice is a critical document used in New Zealand business operations where professional services are provided on an ongoing basis under a pre-arranged agreement. It serves as both a billing instrument and a formal record of services rendered, incorporating all necessary elements required by New Zealand tax legislation, particularly the Goods and Services Tax Act 1985. This document type is typically used when a client has engaged a service provider on a retainer basis, where regular payments are made in exchange for guaranteed service availability or regular service provision. The Retainer Invoice should include detailed information about the billing period, services covered, GST calculations, and payment terms, while maintaining compliance with New Zealand's financial reporting and tax requirements.
