EV running costs just changed: what RUC means for Leaf and BYD Atto 3 owners
The NZ Angle
New Zealand's road user charge system for light electric vehicles has been phased in gradually, partly to soften the transition from an era when EVs ran essentially free on public roads. That grace period is over. From mid-2026, light EVs under 3.5 tonnes pay a meaningfully higher RUC rate, bringing them closer to what a diesel driver has always paid per kilometre. The rate NZTA has confirmed sits at $76 per 1,000 kilometres for light EVs, up from the $53 introductory rate that applied from 2024. For a Canterbury driver doing 15,000 kilometres a year across the Plains and up into the Port Hills or across to Hanmer, that's an annual RUC bill of $1,140, paid in advance by purchasing a licence before the odometer hits your purchased distance. It doesn't work like a fuel bill. You buy blocks upfront, carry the RUC licence, and if NZTA enforcement checks your vehicle, you need kilometres in hand. The mechanics matter because people often quote EV running costs without factoring RUC in at all, which makes the comparison with petrol cars misleading from the start.
NZTA's updated light EV road user charges kick in mid-2026. Here's what the real per-kilometre cost now looks like against a petrol Corolla on Canterbury distances.
The question most EV owners have been quietly sitting with is a simple one: once road user charges land properly, does the running-cost story still hold up? The short answer is yes, but with less margin than the early adopter brochures suggested.
Let's run actual numbers for a Canterbury driver doing 15,000 kilometres a year, which is close to the national average and a reasonable yardstick for someone commuting from Rolleston or Rangiora into Christchurch with occasional weekend runs to Kaikōura or the ski fields.
What a Nissan Leaf now costs per kilometre to run
A 2020-2022 Leaf on the used market sits around $18,000 to $24,000 depending on battery spec and kilometres. Running costs are where the calculation lives. Electricity in Canterbury, drawing from home charging on a standard residential rate, runs roughly 28-32 cents per kWh. The 40kWh Leaf manages around 6-7km per kWh in real driving — not the official figure, which assumes flat roads and a light right foot. Call it 6.2km/kWh in mixed Canterbury conditions, which puts your electricity cost at around 4.8 cents per kilometre.
Add the new RUC rate of $76 per 1,000km and you're at 7.6 cents per kilometre just in RUC. Total energy-plus-RUC cost: roughly 12.4 cents per kilometre. At 15,000km a year, that's $1,860 annually in fuel and road charges combined.
A BYD Atto 3, which has a larger 60.5kWh usable battery and weighs considerably more than the Leaf, is slightly less efficient in real use. Budget closer to 5.5km/kWh across the seasons, which nudges the electricity cost to around 5.4 cents per kilometre. Same RUC applies. Total: around 13 cents per kilometre, or $1,950 a year.
What a petrol Corolla costs over the same distance
A comparable 2020-2022 Toyota Corolla hatch, the 2.0-litre petrol, returns around 7.5 litres per 100km in genuine mixed driving — not the 6.3L ADR figure. At $2.70 per litre, that's 20.25 cents per kilometre in fuel alone. Over 15,000km, you're spending $3,037 at the pump.
No RUC on petrol. The fuel excise duty is baked into the pump price, so the comparison is direct. Servicing on the Corolla runs to two or three visits a year, typically $150-250 each. The Leaf needs far less: no oil changes, brake wear is reduced by regenerative braking, and the drivetrain is fundamentally simpler. Budget $300-400 a year for a Leaf in routine servicing versus $600-800 for the Corolla.
On those numbers, the Leaf still saves somewhere between $1,100 and $1,400 a year in operating costs against the petrol Corolla. The BYD Atto 3, being a newer and pricier vehicle at $45,000-plus new and around $35,000-38,000 used, is harder to compare directly with a Corolla on purchase price alone — but running cost per kilometre remains lower.
The gap is narrowing, and the purchase price still matters
The $76 RUC rate is not the end of this story. NZTA has signalled that rates will continue stepping up as EV uptake grows and the government needs road-funding revenue to replace what it collects through fuel excise. The direction of travel is clear: EV RUC will keep rising, and the days of EVs being effectively subsidised road users are gone.
The Clean Car Discount ended in December 2023, which removed up to $8,625 off the purchase price of new EVs. That was real money. Combined with rising RUC, the total-cost-of-ownership picture for EVs has shifted noticeably in two years. The running cost advantage remains, but the payback period on a more expensive purchase has stretched.
For a used Leaf at $20,000 versus a used Corolla at $18,000, the $1,200-a-year running cost saving means you've recovered the price gap inside two years. That maths still works. For a new BYD Atto 3 at $47,990 drive-away versus a new Corolla at $37,990, you need a decade of average driving to come out ahead purely on running costs — and that assumes electricity prices don't climb and RUC rates don't accelerate.
The Leaf remains one of the more honest value propositions in the EV used market precisely because the purchase price is low enough that the running cost saving does meaningful work quickly. The Atto 3 is a better car in almost every other respect — more range, more space, more modern in the cabin — but it asks you to carry a larger capital cost for longer before the fuel saving catches up.
On real Canterbury distances, in real weather, with real electricity bills and real RUC purchases factored in, EVs still cost less to run than a comparable petrol car. That's the honest position. It's just a smaller margin than it was, and anyone telling you otherwise hasn't done the sums since 2023.
By Paul Gray. See our editorial standards or email sales@premiumwholesalecars.co.nz with corrections.
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