WoF or CoF: which one does your vehicle need?

wof Reviewed 12 August 2026 5 min read

Short answer

Most private light vehicles, motorcycles and light trailers take a WoF. Heavy vehicles, vehicles that carry paying passengers, and rental vehicles take a CoF, on a shorter inspection cycle. The line is drawn by two things — the vehicle's gross vehicle mass and what you use it for — and it is the use that catches people out, because it changes the day you start hiring the vehicle out or carrying passengers for money.

Nobody chooses between a WoF and a CoF. Your vehicle falls into one category or the other, and the two things that decide it are the vehicle's gross vehicle mass and what you use it for. Weight is fixed and easy to check. Use is not, and that is where almost every genuine mistake starts.

The short version

If your vehicle is a light vehicle — car, ute, motorcycle, light trailer, caravan — used privately, it takes a Warrant of Fitness. That is the great majority of vehicles on New Zealand roads.

If it is a heavy vehicle, or a vehicle used to carry passengers for payment, or a rental vehicle, it takes a Certificate of Fitness. The CoF inspection is broader, runs on a shorter cycle, and is carried out at a smaller network of sites, because not every garage that issues warrants is appointed to do CoF work.

The dividing line on weight is gross vehicle mass, and the figure that matters is the GVM recorded against the vehicle, not what it weighs on the day. Heavier than the light-vehicle threshold and you are in CoF territory regardless of what the vehicle looks like. NZTA's Certificate of Fitness page sets out the full list of vehicle classes, and it is worth reading it against your own vehicle rather than reasoning from a similar one you have seen.

Use is the part that changes underneath you

A vehicle can move from one category to the other without anything physical happening to it. The common versions:

You start carrying paying passengers. A car used for taxi, shuttle or rideshare work is a passenger service vehicle, and passenger service vehicles are certified with a CoF. The car is identical to the one you drove yesterday; its category is not.

You start renting the vehicle out. Rental vehicles are certified with a CoF. This catches people who buy a second car, or a campervan, and put it on a peer-to-peer hire platform because it sits idle half the year.

You convert or buy something heavier than it looks. A van fitted out as a motorhome, a house bus, a large trailer or a horse float can sit above the light-vehicle threshold while looking domestic. The GVM on the record is what decides it.

Getting this wrong is not neutral. A warrant issued to a vehicle that should be running on a CoF does not make the vehicle's use legal, and the discovery usually happens at the worst possible moment — at an inspection, at a roadside stop, or when a claim is assessed. If your use of a vehicle has changed, check the category before the use starts, not after.

What actually differs

The inspection itself is the obvious difference: a CoF examines a longer list of items, in line with the fact that the fleet it covers is heavier, used more intensively and carries people for money.

The cycle is the second difference. CoF inspections run more frequently than a WoF — for most CoF vehicles the certificate is short-lived by design — and the exact interval depends on the vehicle type. Confirm the interval for your specific vehicle rather than assuming the one your neighbour's truck runs on.

The third difference is where you can go. WoF inspections are available at a large number of appointed sites. CoF work is done at a much smaller network, which matters practically: the site nearest to you may not do it, and if a CoF vehicle fails, the recheck rules tie you to the organisation that inspected it, so the travel adds up. What a CoF involves sets out the detail on that side.

And a fourth, which matters right now: the inspection changes taking effect on 1 November 2026 are changes to light vehicle inspections. They alter WoF frequency bands. They do not change the CoF cycle, so if you run a CoF vehicle none of that news applies to you.

Trailers and caravans confuse people more than they should. A light trailer or caravan is certified with its own WoF — it is not covered by the towing vehicle's warrant, and it does not get skipped because it is not driven. If that is your situation, what the WoF inspection covers deals with the trailer, caravan and motorhome rules specifically.

How to check which one you need, without guessing

Find the GVM recorded against the vehicle
Not the kerb weight and not an estimate. This is the number that decides light or heavy, and it is recorded against the vehicle rather than being a matter of opinion.
Write down what you actually use it for
Private use, carrying paying passengers, hire, or business use that involves neither. Be honest about the paid ones, because that is the deciding factor.
Check both against NZTA's class list
The vehicle classes that require a CoF are published. Match your vehicle to a class rather than to an anecdote.
Ring a CoF-appointed site if you are still unsure
They deal with the boundary cases daily and will tell you before you book. This is a thirty-second phone call that saves a wasted trip.
Re-check whenever the use changes
Selling, hiring out, starting passenger work or fitting the vehicle out as a motorhome are all triggers to look again.

If you turned up for the wrong one

A wasted trip is the small version of this problem. The larger version is discovering a vehicle has been running on the wrong certification for months. Neither is a penalty in itself, but neither fixes itself, and a lapsed certificate of either kind exposes you to a $200 infringement fee with no grace period — the rules on driving with an expired warrant apply from the day after expiry, and there is nothing in either scheme that gives you a settling-in period.

If your vehicle is a normal light vehicle used privately, none of this affects you and the Warrant of Fitness overview is all you need.

Frequently asked questions

What is the difference between a WoF and a CoF?

They are the same idea applied to two different fleets. A Warrant of Fitness is the periodic safety inspection for light private vehicles. A Certificate of Fitness is the equivalent for heavy vehicles and for vehicles used commercially to carry passengers or for hire, and it runs on a shorter cycle with a broader inspection. You do not choose between them: your vehicle's weight and use determine which one applies.

Does my van need a WoF or a CoF?

It depends on its gross vehicle mass and what you do with it, not on whether it looks like a van. A private van under the light-vehicle threshold takes a WoF. The same van takes a CoF if it is over the threshold, or if it is being used for hire or reward. The GVM figure is recorded against the vehicle, so check that rather than estimating the weight.

Do I need a CoF for rideshare or taxi work?

Vehicles carrying paying passengers are passenger service vehicles and are certified with a Certificate of Fitness rather than a Warrant of Fitness, regardless of how ordinary the car is. This applies from the point the vehicle goes into that use, not from when someone asks about it, and it usually sits alongside driver endorsement requirements. Confirm the current requirements with NZTA before your first paid trip.

Do the November 2026 WoF changes apply to CoF vehicles?

No. The changes taking effect on 1 November 2026 are changes to light vehicle inspections — the frequency bands they alter are WoF frequencies. If your vehicle runs on a CoF, its inspection cycle is unaffected by them.

I have a WoF but I should have had a CoF. What now?

A warrant issued to a vehicle that should be certified with a CoF does not make its use legal, so the answer is to fix the certification rather than rely on the label in the windscreen. Talk to an inspecting organisation that does CoF work — the CoF network is smaller than the WoF network — and expect the vehicle to need an inspection against the CoF standard rather than a paperwork correction.

Sources and verification

NZ Transport Agency Waka Kotahi. Warrant of Fitness, checked 2026-08-12.
NZ Transport Agency Waka Kotahi. Official vehicle and driver licensing information, checked 2026-08-12.
NZTA Vehicle Inspection Portal. Changes to light vehicle inspections from 1 November 2026, checked 2026-08-12.

Checked against the sources above. If something has changed, tell us.

Next step

CoF detail Certificate of Fitness Who needs one, how the cycle works, and where they are done. Continue WoF detail Warrant of Fitness Frequency, scope and what the inspection actually covers. Continue Caravans and trailers WoF requirements What gets inspected, and the rules for caravans, trailers and motorhomes. Continue

Your WoF has expiredThere is no grace period on an expired Warrant of Fitness. What the $200 fine covers, the one situation where you may still drive, and how to get back on the road.