Time And Material Invoice Template for New Zealand

When you provide services or materials to clients on a variable-cost basis, you need a Time and Material Invoice that meets New Zealand's legal and tax requirements. This document allows you to bill clients for actual hours worked and materials consumed, providing transparency and legal protection for both parties in your business relationship.

When do you need this document?

You'll need a Time and Material Invoice when undertaking projects where the exact scope cannot be predetermined. Construction contractors use these invoices when building costs fluctuate based on site conditions and material prices. IT consultants rely on them for software development projects where requirements evolve during implementation. Professional service firms like lawyers, accountants, and engineers use time and material billing when client needs extend beyond initial project estimates. Maintenance and repair services also benefit from this billing method when the extent of work becomes clear only after assessment.

Key legal considerations

Your Time and Material Invoice must include essential elements to ensure legal compliance and enforceability. Under the Fair Trading Act 1986, you must provide accurate descriptions of services and materials to avoid misleading conduct claims. Include detailed breakdowns of hourly rates, time spent on specific tasks, and itemized material costs with quantities and unit prices. The Contract and Commercial Law Act 2017 requires clear payment terms and service descriptions to support contract enforcement. Document retention becomes crucial under the Tax Administration Act 1994, which mandates keeping invoice records for seven years. Ensure your invoice includes authorized signatures from both parties to establish legal agreement on charges incurred.

Legal requirements in New Zealand

The Goods and Services Tax Act 1985 imposes specific requirements for invoices exceeding $1,000, including your GST registration number, tax calculation breakdowns, and total GST amounts. Your invoice header must display your business's full legal name as registered under the Companies Act 1993, along with your complete business address and contact information. Include the client's full legal name and address to establish clear billing relationships. Specify the service period covered by the invoice and ensure GST calculations are clearly separated from base charges. Your invoice numbering system must be sequential and unique to support audit requirements. Payment terms should align with standard commercial practices, typically 20-30 days from invoice date, unless otherwise agreed in your service contract.