RUC rates / cost

Light vehicles: the fuel type does the work

For a vehicle under 3,500 kg, the classification comes down to how it is powered.

Diesel is the long-standing case. Diesel is not taxed at the pump in New Zealand, so diesel light vehicles have always bought their road use as distance.

Fully electric vehicles joined the same system when the light EV exemption ended in 2024. The intent stated at the time was that an EV should pay roughly what an equivalent petrol vehicle pays through fuel excise, so the light EV rate is built around that comparison rather than around anything to do with electricity.

Plug-in hybrids are the fiddly one. A PHEV buys petrol, and pays fuel excise on it, and also does some of its distance on battery. Charging it the full light EV rate would mean paying twice for the same kilometres, so PHEVs sit on their own reduced rate. RUC for electric vehicles goes into what that means in practice for owners.

A conventional hybrid that has no plug and only ever fills up with petrol is not in the RUC system at all — it pays at the pump like any other petrol car.

Heavy vehicles: axles and licensed weight

Above 3,500 kg the pricing changes character entirely, because the thing being charged for changes. Heavy vehicles are priced on the damage they do to road surfaces, which scales sharply with weight per axle rather than with weight alone.

Two things decide the rate. The RUC vehicle type, which is a numbered classification describing the axle configuration — how many axles, arranged how. And the licensed weight, the maximum gross weight you are declaring the vehicle will operate at. You buy distance at the rate for that type and weight combination.

Trailers are charged separately from the towing vehicle and often measure distance with a hubodometer rather than an odometer, which is why a truck and trailer unit involves two RUC positions to keep on top of rather than one.

Working out your own number

Once you know your classification, the sum is the rate for your type multiplied by the number of 1,000 km blocks, plus the transaction fee for the purchase. That fee is charged per purchase, not per block, which is the one genuine saving available: buying 10,000 km in one go costs one fee, and buying it in ten separate purchases costs ten.

If you would rather not do it by hand, NZTA runs an official RUC calculator that handles the vehicle types for you.

What the cost does not include

RUC is not your rego and does not overlap with it. Your vehicle licence is a separate time-based charge with its own due date, and paying a large block of RUC does nothing to keep your rego current. People conflate the two constantly, usually at the point where one has lapsed and the other has not.

RUC also does not include anything for a WoF, a CoF or an ACC levy paid through some other channel. It buys distance, and only distance.

If the cost has already become a debt

A large unexpected RUC figure is usually not a rate problem. It is an accumulated distance problem — an odometer that ran past the end of a licence for months, then got read at an inspection. That is a different situation with a different process, and RUC invoices and debt deals with it.

When you are ready to buy, our guide to buying RUC covers the odometer reading that decides whether the purchase lands correctly, and the RUC overview explains how the whole system fits together.