How To Legally Work as a Subcontractor in New Zealand

Using subcontractors can be a great way to scale your business without taking on the overheads (and long-term commitments) of hiring employees.

But if you’re bringing subcontractors into your operations, you’ll want to get the legal side right from day one. The “set and forget” approach can backfire quickly - especially if there’s a dispute about payment, quality, delays, health and safety, or whether the person was really an employee in disguise.

In this guide, we’ll walk you through how to legally engage subcontractors in New Zealand, with a focus on the document most businesses rely on day-to-day: a well-drafted subcontractor agreement. We’ll also cover key tax and compliance issues to have on your radar as a small business.

What Does “Subcontractor” Mean (And Why It Matters For Your Business)?

A subcontractor is usually a contractor you engage to perform specific work for your business (often in connection with work you’ve promised to deliver to your customer). This is common in trades, construction, IT, marketing, cleaning, logistics, professional services, and project-based work.

From a business owner’s perspective, the big legal risk isn’t just “Do I have someone helping me do the work?” - it’s:

• Do we have clear written terms?
• Do the day-to-day working arrangements match the contract?
• Am I accidentally treating them like an employee?
• Do I know what I need to do around tax, invoicing, and records?
• What happens if something goes wrong (delay, defect, injury, customer complaint)?

Subcontractor Vs Employee: Don’t Fall Into The “Sham Contracting” Trap

One of the most common issues we see is where a business uses a “contractor” label, but the reality looks and feels like employment. If someone should legally be treated as an employee, you could be exposed to claims for leave entitlements, wages, and penalties - and it can also impact tax obligations.

There’s no single magic test, and the legal analysis looks at the real nature of the relationship (not just what the contract calls it). Practical factors can include whether the person:

• has genuine independence and control over how they do the work
• can subcontract or hire others to do the work
• provides their own tools and equipment
• takes on commercial risk (e.g. fixes defects at their cost)
• works for multiple clients
• is integrated into your business like staff (uniform, roster, “manager” supervision, etc.)

If you want a deeper dive into the difference, it’s worth reading contractor vs subcontractor and Working as a contractor to sense-check how your engagement model stacks up.

When you’re unsure, getting the contract right is step one - but making sure your actual practices match the agreement is just as important.

Why A Subcontractor Agreement Is Essential (Even If You “Trust Them”)

A strong subcontractor agreement is one of the simplest ways to reduce risk in your business. It sets expectations upfront and gives you a clear pathway to deal with issues if they arise.

Without a written subcontractor agreement, you can easily end up in disputes about things like:

• what exactly was included in the scope
• what “done” means (and whether rework is required)
• who pays for delays, defects, or variations
• when payment is due (and whether you can hold retention)
• ownership of materials, IP, or client data
• whether the subcontractor can approach your customer directly
• what happens when the relationship ends

In many industries, your subcontractors are a direct extension of your brand. If something goes wrong, your customer will usually come to you first - which is why your subcontractor agreement should be clear on standards, liability, and how issues are managed.

Do You Need A Subcontractor Agreement NZ Template?

It’s normal to search for a “subcontractor agreement template NZ”, especially when you’re trying to move fast or keep costs down.

But templates are risky because they usually:

• aren’t tailored to your industry (trades vs IT vs creative work are very different)
• don’t match the reality of how you run projects
• miss key clauses that protect you (like defects, variations, milestones, and IP ownership)
• can create ambiguity that becomes expensive later

In other words, a generic template might “look legal” but still leave your business exposed. If you want something fit-for-purpose, a tailored Sub-contractor agreement is usually the safer option.

What Should A Subcontractor Agreement Include?

A good subcontractor agreement is practical. It should reflect how work actually gets delivered in your business - not just legal theory.

While every arrangement is different, here are the clauses we commonly recommend considering.

1) Parties, Status And Relationship

Your subcontractor agreement should clearly state that the subcontractor is an independent contractor (not an employee) and is responsible for their own tax obligations, insurances, and compliance.

That said, remember: calling someone a contractor doesn’t automatically make them one. Your day-to-day operations need to align with the contract.

2) Scope Of Work (And What’s Not Included)

This is the heart of the agreement. Be specific about:

• the services to be delivered
• deliverables (what you will receive and in what format)
• site rules or customer requirements
• hours or availability expectations (if relevant)
• exclusions and assumptions (what’s not included)

If your projects change over time, consider attaching a scope of work (SOW) per job, rather than rewriting the entire agreement each time.

3) Timeframes, Milestones And Variations

If timing matters (and it usually does), your subcontractor agreement should cover:

• start and end dates (or project phases)
• milestones and deadlines
• how variations are requested, priced, and approved
• what happens if the subcontractor causes delays

This is especially important if you’re managing customer expectations and your own cashflow depends on project completion.

4) Fees, Invoicing And Payment Terms

Clearly define whether the subcontractor is paid:

• hourly/daily rates
• fixed fee per job
• milestone payments
• per unit (e.g. per delivery, per install, per asset produced)

Also set out:

• when invoices can be issued
• your payment timeframe (e.g. 7/14/20 business days)
• whether expenses are reimbursed (and what approvals are needed)
• whether you can withhold payment for defective or incomplete work

If you also supply goods or services to customers more broadly, it can help to align your payment rules with your Terms of trade so your internal systems are consistent.

5) Quality Standards, Defects And Rectification

One of the most business-critical clauses is how defects are handled. Your subcontractor agreement can cover:

• minimum quality or workmanship standards
• inspection and acceptance processes
• a defects liability period (where relevant)
• the subcontractor’s obligation to fix defective work
• your rights if they don’t fix defects (e.g. get someone else to fix and recover costs)

This matters because even if the subcontractor caused the issue, your customer may hold you responsible under your customer contract.

6) Health And Safety Responsibilities

Health and safety isn’t optional in NZ. Under the Health and Safety at Work Act 2015, you may have duties as a PCBU (Person Conducting a Business or Undertaking).

Your subcontractor agreement should clearly cover:

• site rules and safety procedures
• training, PPE, and reporting requirements
• who is responsible for hazard management
• notifiable events and incident reporting

If you’re working on client sites, you’ll also want your subcontractor to comply with the customer’s site policies (and to cooperate with any investigations).

7) Confidentiality, Privacy And Customer Relationships

If subcontractors will access customer data, project files, pricing, or internal systems, confidentiality is key.

Also consider privacy: under the Privacy Act 2020, if personal information is being collected, used, stored, or shared, you need to take reasonable steps to protect it and only use it appropriately.

Many businesses also include “non-solicitation” style terms (for example, stopping a subcontractor from approaching your customer directly for a period of time). The right clause depends on your commercial risk and needs to be drafted carefully.

If your business collects or manages personal information, having a properly drafted Privacy Policy is also a practical step to set expectations and reduce compliance risk.

8) IP Ownership (Especially For Creative, Software, Marketing And Content Work)

If a subcontractor creates IP for you - designs, code, photos, written content, brand assets, systems - don’t assume you automatically own it.

Your subcontractor agreement should clearly state:

• who owns any “background IP” each party brings in
• who owns the new IP created during the work
• whether the subcontractor is assigning IP to you or licensing it to you
• any restrictions on reuse (for example, using your materials for another client)

This is one of the most common gaps in DIY contracts, and it can become a real problem when you try to scale, sell your business, or enforce brand consistency.

9) Termination And Exit (So You’re Not Stuck)

Even strong working relationships change. Your subcontractor agreement should explain:

• how either party can terminate (notice periods, termination for breach, immediate termination options)
• handover obligations (returning documents, completing work in progress)
• final invoices and how they will be assessed
• ongoing obligations (confidentiality, IP, non-solicitation, warranties)

This protects your ability to continue servicing your customers if a subcontractor relationship breaks down.

Tax, GST, ACC And Record-Keeping: What Business Owners Need To Get Right

When you engage subcontractors, you’re not just outsourcing work - you’re also managing financial and compliance risk.

Important: the information below is general only and isn’t legal, tax or accounting advice. Tax treatment can depend on the specific working arrangement, the type of services, and IRD guidance at the time. If you’re unsure, speak to your accountant (and get legal advice on the underlying contract/relationship).

Here are the main tax and admin areas to pay attention to in New Zealand.

1) GST: Are You Being Charged GST And Should You Claim It?

A subcontractor may (or may not) be GST-registered. If they are GST-registered, their invoices should include GST and you may be able to claim GST (if you’re GST-registered and the cost is deductible for your business).

If they’re not GST-registered, they should not charge GST. This can impact your pricing and margins, so it’s worth confirming upfront.

Tip: make sure your subcontractor agreement requires compliant invoices (including GST details where applicable) so your bookkeeping doesn’t become a mess later.

2) Withholding Tax / Schedular Payments (Industry-Dependent)

In some industries and payment types, withholding tax (often referred to as schedular payments) may apply. Where it applies, the payer may need to deduct an amount and pay it to IRD, and there can be specific rules about rates, exemptions and required information.

Whether this applies depends on the nature of the work, the subcontractor’s status and IRD requirements (and the rules can change over time). Because getting this wrong can create liabilities, it’s worth checking current IRD guidance and confirming the setup with your accountant before you start paying invoices.

3) Income Tax And “Who Pays What?”

A true subcontractor generally pays their own income tax. That’s one of the key differences from an employee, where you (as the employer) run PAYE deductions.

From your perspective, your key responsibilities are usually:

• making sure you’re paying against proper invoices
• keeping good records (contracts, invoices, payment confirmations)
• ensuring you’re not unintentionally creating an employment relationship

4) ACC: Make Sure You’re Not Assuming Coverage Incorrectly

ACC settings and levies can differ depending on whether someone is an employee or self-employed, how they earn income, and how their work is classified. Contractors typically manage their own ACC obligations, but your business can still have real exposure if (for example) the relationship is later treated as employment, or if health and safety duties aren’t managed properly.

Practically, it’s sensible to:

• ask subcontractors to confirm their ACC arrangements are in place (where relevant)
• ensure your health and safety systems cover subcontractors on your sites
• keep clear documentation showing the relationship is genuinely independent

5) Insurance: Don’t Leave This To Chance

Even if you have business insurance, your policy might not cover everything a subcontractor does (or it may have conditions). Depending on your industry, you may want subcontractors to carry their own:

• public liability insurance
• professional indemnity insurance (common for consultants, designers, IT)
• contract works insurance (construction/project work)
• vehicle/tool cover (where relevant)

Your subcontractor agreement can require evidence of insurance and set minimum coverage amounts.

Compliance Beyond The Contract: Consumer, Advertising, Privacy And Fair Dealing

It’s easy to think subcontractor compliance starts and ends with a subcontractor agreement. In reality, the agreement is only one part of your legal foundations.

Here are the broader compliance areas many small businesses need to keep in mind when subcontractors are involved.

Fair Trading Act 1986: Don’t Overpromise What You Can Deliver

If your subcontractor’s work affects what you advertise or promise customers, you’ll want to ensure your marketing and sales claims stay accurate. The Fair Trading Act 1986 prohibits misleading or deceptive conduct and false or misleading representations.

For example, if your business is advertising specific timelines, qualifications, or outcomes - but your subcontractor can’t actually deliver that - the risk sits with your business.

Consumer Guarantees Act 1993: Your Customer Usually Comes To You

If you sell services to consumers, the Consumer Guarantees Act 1993 can apply, meaning services must be carried out with reasonable care and skill and be fit for purpose (among other requirements).

Even if a subcontractor did the work, your customer may look to your business to fix the issue. This is why subcontractor agreements should have strong defects/rectification and (where appropriate) liability clauses that match your customer obligations.

Privacy Act 2020: Subcontractors Handling Personal Information

If subcontractors have access to customer contact details, addresses, health information, photos, or any identifying data, you need to manage privacy carefully. The Privacy Act 2020 requires reasonable security safeguards and appropriate collection/use/disclosure practices.

Practical steps include:

• limiting access to what subcontractors actually need
• requiring confidentiality and secure storage
• ensuring subcontractors notify you if there’s a privacy incident

Depending on how you operate, this might also tie into your customer-facing documents and policies, like your Privacy Policy.

Protecting Payments And Enforcing Rights If Things Go Wrong

One of the hardest parts of running a small business is cashflow. If you’re paying subcontractors before you get paid (or if you’re dealing with rework), it can get tight fast.

Your subcontractor agreement should deal with payment triggers, defects, and when you can withhold payment. For higher-risk arrangements, you might also consider whether additional payment-security or risk-management measures are appropriate for your business - but what makes sense (and what’s available) depends heavily on your industry, the deal structure, and the specific facts, so it’s worth getting advice before relying on any “one size fits all” approach.

Step-By-Step: A Practical Subcontractor Onboarding Checklist For Small Businesses

When you’re busy, you need a process you can actually follow. Here’s a practical checklist you can adapt for your business.

Step 1: Confirm The Engagement Model

• Are they genuinely independent, or will the role look like employment in practice?
• Will they work for other clients?
• Do they provide their own tools/equipment?

If your arrangement is closer to employment, you may need an employee contract instead of (or in addition to) contractor documentation.

Step 2: Put The Subcontractor Agreement In Place Before Work Starts

• Agree on scope, pricing, deliverables, timelines, and how variations work
• Lock in confidentiality, IP ownership, and customer protection terms
• Confirm health and safety responsibilities

It’s much harder to negotiate terms once the subcontractor has already started (or once a deadline is looming).

Step 3: Collect The Right Admin Details

• Legal name and entity type (individual/sole trader/company)
• NZBN (if they have one)
• GST status
• Bank details
• Insurance certificates (if required)

Step 4: Align Your Customer Contracts And Your Subcontractor Contracts

If your customer contract requires certain turnaround times, quality standards, warranties, or confidentiality terms, make sure your subcontractor agreement supports those promises.

This is where a tailored approach matters - especially if you work off customer-provided contracts, master service agreements, or purchase orders.

Step 5: Manage Performance Like A Business Relationship (Not Like Employment)

You can (and should) manage performance - but do it in a way that fits a contractor relationship.

That generally means:

• measuring outcomes and deliverables rather than “clocking in”
• using project check-ins rather than day-to-day supervision
• documenting variations, issues, and rework requests

Step 6: Keep Records (You’ll Thank Yourself Later)

Keep a folder (digital is fine) with:

• signed subcontractor agreement
• scopes of work and variations
• invoices and payment receipts
• communications about defects, timeline changes, and approvals

This is hugely valuable if you ever have a dispute or if you need to prove what was agreed.

Key Takeaways

• A tailored subcontractor agreement is one of the best ways to protect your business, set expectations, and reduce disputes about scope, payment, timelines, defects, and ownership.
• Be careful not to accidentally create an employment relationship - your contract matters, but your real-world working arrangements matter just as much.
• Your subcontractor agreement should cover practical commercial issues like scope of work, variations, invoicing/payment terms, defects and rectification, IP ownership, confidentiality, and termination.
• As a business, you also need to keep an eye on tax admin (including GST and any industry-specific withholding obligations), plus ACC and insurance requirements.
• Compliance isn’t just contractual - your business may still have obligations under laws like the Health and Safety at Work Act 2015, Privacy Act 2020, Fair Trading Act 1986, and Consumer Guarantees Act 1993.
• If you’re using a subcontractor agreement template NZ-style, be cautious: generic templates often miss the clauses that actually protect small businesses in real-life disputes.

If you’d like help putting a subcontractor agreement in place (or reviewing your current setup to make sure you’re protected from day one), you can reach us at 0800 002 184 or team@sprintlaw.co.nz for a free, no-obligations chat.