Subcontractor Compliance in New Zealand: IRD, ACC & LBP Requirements for 2026

New Zealand’s construction industry employs over 280,000 people across 80,000 businesses. If you’re a head contractor hiring subbies, you need to manage a set of compliance documents for each one — from IRD tax forms to ACC levy confirmations to Licensed Building Practitioner registrations.

The good news: unlike Australia with its state-by-state variation, New Zealand has a single national regime. The documents are the same whether you’re working in Auckland, Christchurch, or Queenstown.

IRD Withholding: The Tax Basics

When you hire an independent contractor, they should provide you with a completed IR330C (Tax rate notification for contractors) form. This tells you their IRD number and elected withholding rate.

Key rules:

• If a contractor doesn’t provide an IR330C, you must withhold at the no-notification rate (currently 45% for companies, 45% for individuals)
• The standard withholding rates range from 10% to 28% depending on the contractor’s circumstances
• Schedular payments (payments to contractors) must be reported to IRD via your payroll or IR348 return
• You’re liable for any tax that should have been withheld but wasn’t

ACC Levies: Work Injury Cover

New Zealand’s Accident Compensation Corporation (ACC) provides no-fault injury cover for all workers, including contractors. As a head contractor, you should verify that your subbies:

• Have a current ACC levy confirmation (CoverPlus or CoverPlus Extra)
• Are paying their levies (non-payment can result in penalties and debt collection)
• Have appropriate cover for their trade classification

If a subbie is injured on your site and their ACC levies aren’t current, you could face increased scrutiny from WorkSafe New Zealand and potential liability for the injury costs.

Licensed Building Practitioner (LBP) Regime

Under the Building Act 2004, restricted building work (structural, weathertightness, and fire safety work on residential buildings) must be carried out or supervised by a Licensed Building Practitioner. This includes:

• Design work — Design LBPs for plans and specifications
• Carpentry — Most residential structural and envelope work
• Roofing — Primary and secondary roofing
• External plastering — Cladding systems
• Bricklaying/blocklaying — Veneer and structural masonry
• Foundations — Concrete and foundation work

LBP licences are renewed every two years. If you hire an unlicensed sub for restricted building work, the building consent authority can refuse to issue a Code Compliance Certificate, and you face personal liability under the Building Act.

Insurance Requirements

While New Zealand doesn’t have a statutory equivalent to the UK’s Employers’ Liability Insurance requirement, most head contractors and clients require:

• Public Liability Insurance — Typically $1M–2M minimum. Covers third-party injury or property damage.
• Professional Indemnity Insurance — For design-build contractors or those providing professional advice.
• Contract Works Insurance — Covers the physical works during construction.
• Motor Vehicle Insurance — For trade vehicles used on site.

Site Safe and Health & Safety

WorkSafe New Zealand enforces the Health and Safety at Work Act 2015. Key requirements for subcontractors:

• Site Safe passport — Construction H&S training recognised across the industry. While not legally required, most major head contractors require it.
• PCBU duties — Every Person Conducting a Business or Undertaking (PCBU) has duties under the Act. Subbies are PCBUs.
• Hazardous work notifications — Certain types of work require notification to WorkSafe (e.g., asbestos removal, work in confined spaces).

Document Checklist for NZ Subcontractors

For each subbie, you should have on file:

1. IR330C tax rate notification (and IRD number verification)
2. ACC levy confirmation (current year)
3. LBP licence (if doing restricted building work) — verify at lbp.govt.nz
4. Public Liability Insurance certificate (check expiry and coverage amount)
5. Site Safe passport (if required by your contract or client)
6. Trade-specific licences (e.g., Electrical Workers Registration Board, plumbing & gasfitting)
7. GST registration confirmation (if turnover exceeds $60K)

How VendorProof Helps NZ Contractors

VendorProof replaces the spreadsheet with purpose-built compliance tracking. For each subbie, you can upload and track all of the documents above, with automated expiry reminders sent 30, 14, and 7 days before a certificate, licence, or passport expires.

Self-service upload links let subbies upload their own documents directly, and the audit log gives you a complete compliance history for WorkSafe or client audits.

Free for up to 10 subcontractors. No credit card required. Get started here.