Road User Charges (RUC) Calculator – Compare Petrol Tax vs RUC
in New Zealand
Find out what the shift to distance-based charges means for your wallet — in plain Kiwi English.
Wondering how Road User Charges will affect you? Use our simple calculator to compare today’s costs (fuel excise at the pump) with tomorrow’s distance-based RUC system.
Enter your vehicle details and kilometers — we’ll show you what changes to expect.
Enter your vehicle details and kilometers — we’ll show you what changes to expect.
How to Use our RUC Calculator
- Select your vehicle type (petrol, diesel, or EV).
- Enter the kilometers you want to compare.
- Adjust fuel efficiency and excise values if you know them.
- Click calculate — we’ll display today’s cost vs future RUC
RUC Calculator
Tip: 1,000 km is a handy comparison block.
If unsure, ~7–9 L/100km is typical for many cars.
Editable assumption for petrol tax at the pump.
Actual RUC rate depends on vehicle class/weight.
We’ll show “today” vs “future (RUC)”.
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Indicative only. Adjust assumptions to suit your vehicle. Rates/rules may change with legislation.
Why Road User Charges Are Changing
New Zealand is moving from fuel tax to distance-based charging. Petrol drivers currently pay excise tax at the pump, while diesel and EV drivers already pay RUC. By 2027, all vehicles will be on the same system — fairer, transparent, and based on kilometers driven.
What These Numbers Mean for You
- Petrol cars: Today you pay hidden tax in fuel. Tomorrow you’ll pay RUC directly.
- Diesel & EVs: Already paying RUC, the system won’t feel new, just more digital.
- Efficient vs inefficient vehicles: The change may raise costs for hybrids and fuel-efficient cars, but could reduce costs for heavier fuel users
RUCSmart helps you track and stay compliant automatically.
Don’t get caught out by the change.