Sole Trader Or Employee: How Long Can You Contract For One Company In NZ

If you regularly engage the same person as a contractor (often a sole trader) for months or years, it’s natural to wonder whether they’re still genuinely a contractor, or whether the relationship has started to look more like employment.

This question matters because if a contractor is later found to be an employee, your business can face significant backdated costs and disputes - including claims for minimum employment entitlements such as holiday pay and sick leave, and issues around how tax and retirement savings contributions should have been handled. (For tax-specific guidance, it’s best to speak with an accountant or check directly with Inland Revenue.)

Below, we’ll break down how New Zealand law looks at the sole trader vs employee issue, whether there’s a time limit on contracting to one company, the practical risk factors, and the steps you can take to protect your business from day one.

Is There A Time Limit On How Long A Contractor Can Work For One Company?

In New Zealand, there isn’t a simple legal rule that says “a contractor can only work for one company for X months” and then automatically becomes an employee.

Instead, the key question is whether the person is really operating their own business (a contractor/sole trader), or whether they are working as part of your business (an employee) - even if you’ve labelled them as a contractor and even if they have an invoice/sole trader setup.

That means someone can contract to one company for a long time, including years, but the longer and more embedded the relationship becomes, the more important it is to regularly check whether the arrangement still stacks up as true contracting.

Why “How Long” Still Matters (Even Without A Strict Time Limit)

While time alone doesn’t decide it, duration often changes the reality of the working relationship. For example:

• You start giving the contractor more day-to-day direction “because they know the job now”.
• They stop taking on other clients because your work becomes full time.
• They begin managing your staff or representing your brand to customers.
• You provide tools, systems, training, email addresses, uniforms, or business cards.

Over time, these changes can shift the relationship from “independent provider” to “part of the team” - which is exactly what the courts and authorities look at when assessing whether someone is a sole trader or employee in practice.

Sole Trader Or Employee: How Does New Zealand Decide The Difference?

In New Zealand, you generally can’t decide someone is a contractor just by calling them one. A written agreement helps (a lot), but the reality of the relationship is critical.

When a dispute arises, decision-makers often look at the overall picture, including factors like control, independence, integration into your business, and whether the person is really running their own enterprise.

If you’re engaging a contractor on a recurring basis, it’s worth having a properly drafted Contractor Agreement that reflects what you’re actually doing in practice (not what you wish you were doing).

Common Indicators Someone Is More Like An Employee

Here are some red flags that can suggest a contractor is actually an employee:

• You control how, when, and where they do the work (not just what outcomes you need).
• They can’t delegate the work or use their own staff/subcontractors without your approval.
• They’re rostered like staff and expected to “clock in/clock out”.
• They are integrated into your team (company email, managing internal processes, appearing as “staff” to customers).
• You provide most equipment and they don’t invest in their own tools/systems.
• They are paid like wages (fixed hourly rate every week, regardless of project outcome) and don’t quote for jobs.
• They work exclusively for you and have no real opportunity to make a profit or loss like a business would.

Common Indicators Someone Is More Like A Contractor/Sole Trader

On the other hand, signs the arrangement is more likely to be genuine contracting include:

• They run their own business (branding, multiple clients, marketing, business systems).
• They control how they deliver the services and you mainly set deliverables/timeframes.
• They can subcontract or engage help (subject to reasonable conditions like safety and confidentiality).
• They quote per project or invoice based on outcomes/milestones.
• They supply their own equipment and carry their own business costs.
• They carry risk (for example, fixing defective work at their cost, professional indemnity/public liability insurance).

If you’d like a deeper read on the topic, it can help to check the practical issues that come up when working as a contractor - because many “contractor disputes” start with a mismatch between paperwork and real-life work practices.

Why Misclassifying A Contractor Can Be Costly For Your Business

Getting the sole trader vs employee classification wrong isn’t just a technical problem - it can become a cashflow and legal risk.

If a contractor later claims (or is found) to be an employee, you may face:

• Backpay claims for holiday pay, sick leave, and other minimum entitlements (where applicable).
• Tax and KiwiSaver implications, including potential Inland Revenue scrutiny depending on the circumstances. (This article is general information only - for advice on your specific tax obligations, speak with an accountant or Inland Revenue.)
• Disputes about termination - what you thought was “ending a contract” may be treated like dismissing an employee (and employees have formal protections and processes).
• Reputational harm if the issue becomes public or affects other team members.

It also creates uncertainty when you’re trying to scale. Imagine you’re building a high-performing team and budgeting based on contractor invoices - then you discover there may be arguments that you owe employee entitlements for the past year. That’s not a fun surprise.

“But They Asked To Be A Contractor” Doesn’t Always Solve It

Sometimes people prefer contracting because it seems flexible, they want a higher hourly rate, or they like invoicing through their own setup. That preference can be relevant context, but it won’t override the real substance of the relationship.

From a small business perspective, the safest approach is to:

• choose the right engagement model at the start, and
• make sure your written agreement and day-to-day work practices match that model.

Practical Scenarios: When A Long-Term Contractor Relationship Becomes Risky

Long-term contracting isn’t automatically wrong - it’s common in trades, tech, marketing, construction, consulting, and project-based industries.

The risk usually grows when the contractor relationship starts to look like ongoing employment.

Scenario 1: The Contractor Is Essentially Filling A Permanent Role

If the person is doing a job that looks like a standard staff position (for example, “office manager”, “customer support”, “operations coordinator”) with set hours and ongoing duties, a contractor model may be harder to justify.

In that case, an Employment Contract may be more appropriate - and can often be simpler and safer than trying to “contract around” the reality.

Scenario 2: You’re Managing Their Day-To-Day Work Like An Employee

As your business grows, it’s normal to build systems and require consistency. But if that turns into telling a contractor exactly how to do their work, what tools to use, when to be available, and how to behave like staff, it starts leaning towards employment.

A good contractor relationship is usually structured around deliverables and outcomes - not ongoing supervision.

Scenario 3: They Only Work For You (And Don’t Really Have A Business)

Exclusivity isn’t an automatic deal-breaker, but it can be a big factor. If your contractor:

• has no other clients,
• doesn’t market their services, and
• relies on your work as their main income,

then you’ll want to take extra care about how the relationship is structured and documented.

Scenario 4: They Could Compete With You Or Take Your Clients

This is a slightly different angle, but it’s very practical for small business owners. If you treat someone as a contractor (not an employee), they may be freer to work with competitors unless you’ve clearly set boundaries.

Depending on your business, you might consider a tailored Non-compete agreement (or other restraints) - but whether restraints are enforceable is highly fact-specific and generally depends on whether they are reasonable in scope, duration, and the interests being protected.

It’s also worth thinking through what happens if someone you engage sets up something that competes with you. This can get messy quickly, so having clear terms upfront can help. A helpful reference point is the risk area around employee setting up a competing business, because similar issues often arise even where someone is labelled a contractor.

How To Protect Your Business When Engaging Long-Term Contractors

If you want to keep the flexibility of contracting (and avoid the risk of accidentally creating an employment relationship), it helps to treat this like a “systems” job - not just a one-off contract signing.

Here are practical steps you can take.

1. Use The Right Agreement (And Keep It Updated)

If you’re engaging a contractor, your Contractor Agreement should be tailored to:

• the type of work (project-based vs ongoing services),
• how you’ll manage deliverables,
• payment structure (hourly vs fixed fee vs milestones),
• who supplies tools/equipment,
• IP ownership and confidentiality,
• termination and handover, and
• restraints and conflict management (where appropriate).

Just as importantly, if the working relationship changes over time (which is very common), your agreement should change too.

2. Structure The Work Around Deliverables, Not Rosters

One practical way to reduce “employee-like” indicators is to define the contractor’s scope as outcomes and deliverables.

For example, instead of:

• “Be available Monday–Friday, 9am–5pm and complete tasks as assigned,”

you might structure it more like:

• “Provide X services per month,”
• “Complete Y project milestones by Z dates,”
• “Attend scheduled meetings as required,”
• “Meet agreed service levels.”

Every business is different, so the goal isn’t to be rigid - it’s to ensure the relationship still makes sense as contracting in the real world.

3. Avoid Blurring The Lines Operationally

Small operational decisions can create legal risk over time. For example, consider whether you really need to:

• give contractors internal titles that look like staff positions,
• include them in staff-only perks and policies (unless necessary),
• approve all leave/holidays as though you’re their employer, or
• require them to work exclusively for you without a clear business reason.

This doesn’t mean contractors can’t be part of your culture - it just means you should be intentional about how you onboard and manage them.

4. Make Sure Your Contractor Model Matches The Role You Need

Sometimes the simplest fix is a strategic one: if what you actually need is a stable, long-term team member, employment may be the better (and safer) option.

With employment, you get clearer control and integration - but you also take on legal obligations like minimum entitlements and proper termination processes. If that’s the direction you’re heading, putting an Employment Contract in place early can prevent headaches later.

5. Reassess The Relationship Every 6–12 Months

This is a surprisingly effective risk-management habit for small businesses.

Ask yourself:

• Has the contractor become “business critical” like a staff member?
• Have they stopped working for other clients?
• Are we managing them like we manage employees?
• Have their tasks evolved into a permanent role?

If the answer is yes, it may be time to restructure the arrangement (either re-document the contracting arrangement properly or move to employment).

Key Takeaways

• There is no fixed rule on how long someone can contract to one company in New Zealand, but the longer the engagement runs, the more important it is that the relationship still looks like genuine contracting in practice.
• The question of whether someone is a sole trader or employee is decided by the real nature of the relationship (control, independence, integration, business risk), not just the label you use or whether invoices are issued.
• Misclassifying an employee as a contractor can expose your business to backdated costs, tax-related issues, and employment-related claims (the exact consequences will depend on the facts and should be assessed case by case).
• If a person is effectively filling an ongoing role, working set hours, and operating as part of your team, an employment arrangement may be safer than long-term contracting.
• A tailored Contractor Agreement and consistent day-to-day practices (focused on deliverables rather than rosters) are key to reducing risk.
• As your business grows, regularly reassessing contractor arrangements can help you stay compliant and avoid expensive surprises.

If you’d like help reviewing whether you’ve got a true contractor relationship (or whether it’s time to move to employment), our team can help. You can reach us at 0800 002 184 or team@sprintlaw.co.nz for a free, no-obligations chat.