By Greg Allan, tradesman and creator of Data First Coaching
Why is this question harder than it sounds for a window and door business?
It's harder because the workload never sits still. A window and door installer's measure visits, install days and supplier lead times on aluminium and timber frames move week to week, so for a New Zealand business the decision about whether the next pair of hands should be a contractor or an employee usually gets made in the middle of a busy patch, on a feeling, rather than from a clear look at what capacity is actually needed.
When bifold and sliding door jobs back up against a renovation deadline, or a builder is chasing glass that's still on a supplier's truck, most owners reach for whoever answers the phone first. The mate who's done security doors before. The subbie who installed double glazing last winter. Nobody stops to check whether the arrangement actually matches what the law expects of a contractor relationship, or whether it's really an employment relationship wearing a contractor's invoice.
What does it cost a window and door installer to get this wrong?
Getting it wrong costs in two directions. A window and door installer who waits for the bank balance to feel comfortable before bringing anyone on can sit on hands through a run of renovation and builder enquiries that never gets quoted or installed. One who brings someone on and calls them a contractor without the working conditions to match can end up with that worker challenging the status later, and the business carrying costs it never planned for.
According to MBIE, workers can challenge their employment status with the Employment Relations Authority and through the courts if they believe they should be classified as employees, as set out on Increased certainty for contractors coming. For a window and door business running on measure-to-install timing, a dispute like that tends to land at the worst possible moment, usually mid renovation season when every install day is already booked.
What legal tests does New Zealand use to tell a contractor from an employee?
You won't find one single test, because New Zealand uses more than one, and none of them care what the paperwork calls the worker. Employment New Zealand points to the gateway test and the common law test, and Inland Revenue applies its own test for tax purposes based on the actual working conditions, not the label written on an invoice or contract.
As Employee or contractor? explains, there are legal tests to determine whether a worker is an employee or a contractor, and contractors are not employees, so they are not covered by the same laws, rights and obligations as employees. The gateway test came into New Zealand law in February twenty twenty-six and does not apply to arrangements made before that date, so an existing agreement isn't automatically caught by it. Inland Revenue's own guidance, Self-employed or employee, says there is no single test, and that someone who provides their own major assets or equipment, such as their own van, ladders or install tools, and who decides or controls how, when, where and how much they work, is more likely to be genuinely self-employed. A window and door installer who turns up with their own vehicle, sets their own hours around a measure schedule, and chooses which jobs to take looks very different, legally, to someone the business tells where to be and what to install every day.
How do you decide between a contractor and an employee for your crew?
You decide by looking at what the numbers say is coming, not by waiting for confidence or a bigger bank balance. If measure bookings and install days are genuinely stacking up beyond what the current crew can get through, that's a capacity gap to fill, and whether you fill it with a contractor or an employee should follow from how much control the work actually needs, not from nerves about commitment.
This is where a lot of window and door installers get stuck. They wait for a feeling of readiness that never quite arrives, while renovation and builder enquiries sit unanswered. AI agents, software that does a job the way you would, with your prices, your wording and your rules, can carry the quoting, follow up and scheduling work that's eating your time, so bringing the right person on, in the right form, often pays back almost immediately by freeing you for the quoting and supplier negotiation that actually grows the business, instead of leaving you stuck on the tools. That's data first thinking: the decision comes from what your own measure-to-install pipeline is showing, not from how the bank balance feels this week.
What paperwork and tax steps follow once you decide?
Once you've decided, the paperwork follows the status, not the other way round. An employee needs a written employment agreement and a tax code declaration, a contractor needs their own tax arrangements sorted, and simply calling someone a contractor doesn't change what either of you actually owes if the working conditions say otherwise.
Under Hiring your first employee, you must give every employee a written employment agreement, and both of you should sign it before they start work. Inland Revenue's page on Employing staff says all employees must fill in either a Tax code declaration (IR330) or, for contractors receiving schedular payments, a Tax rate notification (IR330C), so the right form has to match the real relationship. Inland Revenue has also said plainly that a taxpayer cannot change their employment status, or the tax that follows from it, merely by calling themselves an independent contractor when they are essentially still an employee. A second set of AI agents, built around your own job records, can hold that distinction job by job, matching who measured, who installed and who invoiced against the right form, so it isn't reconstructed from memory at the end of the quarter.
This is general information, not legal, tax or employment advice. Check your own situation with the body named here or a qualified adviser.
Where can you check the current rules?
- Employee or contractor? covers Employment New Zealand's gateway test and common law test for working out employment status.
- Self-employed or employee covers Inland Revenue's guidance on the working conditions that point to employee or self-employed status for tax purposes.
- Increased certainty for contractors coming covers MBIE's announcement of the gateway test and the right to challenge status through the Employment Relations Authority.
- Hiring your first employee covers what a written employment agreement must include before an employee starts.
- Employing staff covers Inland Revenue's requirements for tax code declarations and contractor tax rate notifications.
How does Data First Coaching approach this?
Data First Coaching starts from your own measure bookings, install schedule and supplier lead times through the Trade Business Intelligence, because that is where the real capacity gap shows up, not in a feeling about readiness. Greg Allan built this after running his own trade business, and he has said “The relief with the full-time trades person was instant.” for exactly that reason: the right hire, in the right form, changes what the owner spends the day on. The how of matching structure to capacity, and the records that sit behind it, gets worked through inside the Academy, with members, because the Trade Business Intelligence is powered by every member, for every member, and that only works for owners who are open minded, innovative and willing to share what they learn.
