Established contractors
FBT for solo directors: why a company vehicle is taxed on availability, not use
Why fringe benefit tax triggers on availability rather than use, the four conditions behind the work-related vehicle exemption, and the cleanest way to stay out of FBT's way entirely.
~7 min read · Facts checked 16 Jul 2026
Fringe benefit tax stops companies paying people in things instead of money. For a solo director paying themselves through their own company, FBT is mostly about one thing, the vehicle, and one widely misunderstood exemption, the signwritten ute. This guide covers how the tax works and the mistake that catches most contractors.
What FBT is
When a company provides an employee (including its shareholder-employee, you) with a non-cash benefit, the company pays FBT on the value of that benefit: typically a vehicle available for private use, low-interest loans (the overdrawn current account territory covered in the drawings guide), or perks like insurance paid on your behalf. The rates are set high on purpose: the single rate is 63.93% of the benefit's taxable value, which mirrors the top personal rate so benefits can't out-compete salary. There is also an alternate 49.25% rate for quarters one to three with a year-end wash-up. That is detailed calculation work an accountant usually handles, so it is worth knowing it exists rather than running it yourself. Returns are typically quarterly.
Company vehicles: taxed on availability, not use
The rule that surprises most people is that FBT on a company vehicle triggers on availability for private use, not on actual use. The company car parked at your house every night is available for private use on every one of those days, and the fact that you barely drove it privately doesn't change the calculation. For a solo director, a company-owned everyday car is therefore one of the more expensive ways to own a vehicle, and the comparison with owning it personally and claiming business use usually favours the latter.
The work-related vehicle exemption, in full
The exemption behind every signwritten ute exists, but it has four conditions and needs all of them:
- The right kind of vehicle: mainly designed to carry goods (utes including double cabs, vans, vehicles with the rear seats permanently out), not principally a people-carrier. A sedan or ordinary SUV can't qualify however it's painted.
- Permanent, prominent signwriting with the business identification on the exterior; magnetic or removable signs don't count.
- A written restriction on private use: a letter on file limiting private use to travel between home and work plus incidental stops in the course of business (the supermarket on the way home is fine; the weekend boat ramp is not).
- Regular checks that the restriction holds, documented quarterly.
If you meet all four, FBT doesn't apply for the days the vehicle qualifies as a work-related vehicle. If you let one condition lapse, or allow weekend private use, which is FBT-liable for those days, the exemption applies to fewer days accordingly. The common belief that "utes are FBT-free" is the four-condition rule with three of the conditions forgotten.
How to avoid FBT entirely
For most solo directors, the simplest position is having no fringe benefits at all. Own the car personally and charge the company for business use, keep the current account out of overdraft, and take value as salary. FBT then stays a tax you understand rather than one you have to file.
How Coffer fits
Coffer is built for sole traders today, and FBT doesn't arise for a sole trader. There's no company, so vehicle costs are just apportioned expenses. This guide is here because contractors who outgrow sole trading run into FBT next, usually through the vehicle question, and company support is on Coffer's roadmap.
References
- Calculation options and rates for fringe benefit tax · Inland Revenue Department · accessed 16 Jul 2026
- Fringe benefit tax exemptions for motor vehicles · Inland Revenue Department · accessed 16 Jul 2026
- Employer provided motor vehicles for private use · Inland Revenue Department · accessed 16 Jul 2026