EVs and RUCs: what Leaf and Atto 3 owners actually pay now

The RUC exemption for light EVs ended in April 2024. Here's what used Nissan Leaf and BYD Atto 3 buyers in Canterbury will pay per kilometre, and whether the sums still add up.

The exemption is gone and the confusion hasn't fully settled. Since April 2024, every light EV on New Zealand roads pays road-user charges at the same $76 per 1,000 km rate that applies across the RUC regime. For anyone who bought a used Leaf in 2022 expecting years of free road access, that was a rude landing. For buyers shopping now, it's simply the cost of entry, and it needs to factor into every comparison against a petrol car.

Let's put actual numbers on it.

What the RUC costs per kilometre

At $76 per 1,000 km, you're paying 7.6 cents per kilometre in RUCs alone. A typical Kiwi driving year is around 12,000 to 14,000 km. Call it 13,000 km. That's $988 in RUCs annually. Not nothing, but not catastrophic either. The number that matters is what you're paying all-in per kilometre to move the car.

A 40 kWh Nissan Leaf, the generation that dominates the Canterbury used market, will use somewhere between 15 and 18 kWh per 100 km in real driving. Night-rate home charging in Christchurch sits around 17 to 22 cents per kWh depending on your plan. Take 18 kWh per 100 km and 20 cents per kWh, and your electricity cost is 3.6 cents per kilometre. Add the 7.6 cents RUC and you're at 11.2 cents per kilometre total energy cost. The 62 kWh Leaf Plus shifts the range picture but the per-kilometre energy consumption stays similar.

The BYD Atto 3 runs a 60.5 kWh battery and uses roughly 17 to 20 kWh per 100 km. Energy cost per kilometre at the same charging rate comes out around 3.4 to 4.0 cents. Add the 7.6 cent RUC and you're in the 11 to 12 cent range. Essentially the same as the Leaf, because the RUC is the dominant variable once you're on a reasonable home charging rate.

Now put a petrol car alongside that. Petrol at $2.70 per litre, a conservative midpoint for Canterbury right now. A Toyota Corolla hatch using 7.5 litres per 100 km costs 20.25 cents per kilometre in fuel alone. A Mazda CX-5 petrol at 9 litres per 100 km is 24.3 cents per kilometre. Even a frugal 1.5-litre Japanese import doing 6 litres per 100 km is 16.2 cents per kilometre. The EV is still materially cheaper to run per kilometre, even with full RUCs applied.

The used-car price gap changes the equation

The catch is the purchase price, and this is where the Canterbury second-hand market gets interesting.

A decent 30 kWh Leaf, the 2016 to 2017 generation, is available from around $14,000 to $18,000. The 40 kWh cars, 2018 onwards, are typically $19,000 to $25,000 depending on condition and battery state of health. These are the ones worth buying; the 30 kWh cars have real-world Canterbury winter range that starts feeling tight once you factor in heating load and the inevitable degradation on a battery that's now seven or eight years old.

BYD Atto 3s are a different proposition. They arrived in New Zealand from 2022 and the used examples now appearing are generally low-kilometre, ex-fleet or early private sales. Prices sit in the $35,000 to $45,000 bracket. That's a significant premium over a late-model Leaf, and the running cost savings per kilometre are almost identical. You're paying for newer technology, a longer range, and a warranty situation that still has some life in it on the better examples.

To recover a $15,000 price difference between a $22,000 Leaf and a $37,000 Atto 3 purely through running costs, at the per-kilometre savings over a petrol equivalent, you'd be driving for a very long time. The Atto 3 makes more sense as a primary family car covering serious annual distance. The Leaf makes more sense as a second car or a Christchurch commuter where the range limitations don't bite.

Whether the value proposition holds

It does, with caveats.

The RUC change made EVs less cheap to run, but it didn't flip the equation. The per-kilometre running cost of either car is still roughly half what you'd pay feeding a comparable petrol vehicle at current pump prices. Over 13,000 km a year, that's a real saving, somewhere in the $1,200 to $1,500 range annually compared to an efficient petrol car, more against anything thirsty.

What's changed is that the old mental shortcut, EVs cost nothing to run, is dead. You pay RUCs. You pay for electricity. You factor in WoF, tyres, and for older Leafs, the creeping risk of a battery replacement that could run $8,000 to $12,000 if you're unlucky. The maths still works but it requires doing the maths.

For a Canterbury buyer putting 15,000 km a year on a daily driver, a well-specced 40 kWh Leaf at $22,000 remains a sensible choice. The running costs are low, the WoF history on most Japanese-compliance examples is clean, and the city range is entirely adequate. Just check the battery state of health before you sign anything, and price in a full year of RUCs before you drive it away.