Construction Invoice Template - New Zealand

GST in New Zealand is set at 15% and applies to most construction services and materials. Your construction invoice should show the subtotal before GST, then add 15% to calculate the GST amount, with the final total displayed prominently. Ensure your invoice clearly labels "GST" alongside the calculated amount—clients need to see this breakdown for their own accounting. If you're GST-registered, your IRD number must appear on the invoice. Materials and labour are both subject to GST unless you're invoicing a GST-exempt entity. Keep detailed records of GST collected for your quarterly GST returns to the IRD.

Progress invoicing is standard practice for construction work spanning multiple weeks or months. Rather than invoicing the entire project on completion, you invoice at agreed milestones—typically when foundation is complete, framing finished, electrical rough-in done, etc. This protects your cash flow and is fairer to clients paying for work as it's completed. Establish these milestones and payment dates in your contract before work begins. Each progress invoice should clearly reference the project, describe work completed in that stage, and reference the original project agreement to avoid disputes over what's been done and what remains.

Breaking down materials and labour separately on your construction invoice provides transparency and helps clients understand cost allocation. List materials with their descriptions and costs, then itemize labour separately—either by task (framing labour, electrical labour) or by daily/hourly rates. This breakdown helps with GST implications for certain scenarios and gives clients clarity on what they're paying for. Construction clients expect this level of detail, especially on larger projects. It also protects you if disputes arise, as the itemization shows fair pricing and justifies your charges. Use your construction invoice template to create clear sections for each category.

Construction projects often encounter changes—additional scope, unforeseen structural issues, or client requests for upgrades. Create a variation order (change order) document signed by the client before proceeding with extra work. Once approved, variations can be added to your next progress invoice or invoiced separately as a variation invoice. Clearly label these as variations with reference to the original project, the change order number, and a description of additional work. Include the extra cost and GST separately so it's obvious to the client. Never invoice for variations without prior written approval—this is the single best protection against payment disputes in construction.

Industry-standard payment terms in NZ construction are typically 20–30 days from invoice date, often described as "NET 20" or "NET 30". These terms give clients time to process payments while protecting your cash flow. For larger projects, consider a deposit upfront (often 10–25%) and holdback (10–15%) until practical completion. Your construction invoice should clearly state the payment terms, due date, and acceptable payment methods (bank transfer, EFTPOS, etc.). Include bank account details for payment. Specify late payment interest if applicable—this incentivizes timely payment. Consistent, clearly communicated terms reduce disputes and payment delays significantly.

Yes, you can invoice for subcontracted work, but your construction invoice must clearly distinguish between your own labour and subcontractor costs. If you're contracting trades like electricians, plumbers, or specialists, show these as line items with descriptions—"Electrical work by licensed electrician" and the cost. Ensure you have a written agreement with subcontractors outlining payment terms. You remain responsible for their work quality to the client, so verify all invoicing is accurate. GST applies to subcontractor costs, so include these in your GST calculation. Some clients may require subcontractor details or proof of work insurance, so keep documentation ready. Using a professional construction invoice template makes this breakdown clear.

A compliant NZ construction invoice must include your business name, IRD number (if GST-registered), and address; the client's name and address; an invoice number and date; a clear description of work performed; materials supplied; labour rates or fixed amounts; quantities and rates; subtotal; GST calculation at 15%; total due; and payment terms. Include a due date and your payment details (bank account). Reference any project name or contract number for clarity. For construction work, include the location of the work being performed. The more specific your descriptions and itemization, the less likely clients will dispute charges. A professional construction invoice template ensures you don't miss required fields.

Construction suppliers and builders often face payment risk when delivering materials. Include a retention or holdback clause in your contract—typically 5–15% of the invoice value held until practical completion. Specify in your construction invoice that materials remain your property until full payment is received, or consider taking a personal property security interest (PPSI) registered with the Personal Property Securities Register. Invoice promptly upon delivery. For high-value material deliveries, consider a deposit before supply. Include clear payment terms stating what happens if payment is late (interest accrual). These protections are standard in NZ construction and signal professionalism. Documenting material delivery with photos or signed dockets strengthens your position if disputes arise.