# Rego & RUC Calculator — New Zealand

Source page: https://valem.run/calculators/new-zealand/car-tax

New Zealand vehicle cost is the annual licence (rego) plus Road User Charges (RUC) for diesel and electric vehicles by distance.

**Tax year:** 2026

## How it is calculated

New Zealand has no CO2 car tax. Petrol cars pay an annual licence (rego); diesel and electric vehicles pay Road User Charges (RUC) instead, at 76 NZD per 1,000 km.

RUC is the high-volume half of the query because it scales with distance driven. Road user charges for light electric vehicles began on 1 July 2026, ending their exemption, and plug-in hybrids pay half the rate at 38 NZD per 1,000 km. Pick your fuel type and enter your annual distance. Estimate, not advice.

## Worked example

With Fuel type of petrol, this model computes Annual total of 107 NZD.

## Inputs

| Name | Label | Type |
| --- | --- | --- |
| `fuel` | Fuel type | string |
| `km` | Annual distance (km) | number |

## Sources

- [NZTA — rego & RUC](https://www.nzta.govt.nz) (checked 2026-08-02)

## What this page claims

The Valem engine reproduces this model's formula through 4 self-test cases. That shows internal consistency, not that the formula matches current law; the cited sources are the evidence for that. Estimate, not tax advice.

## For agents

- Model manifest (formula, constants, test vectors): https://valem.run/calculators/new-zealand/car-tax.json
- Compute by URL: https://valem.run/calculators/new-zealand/car-tax.json
- MCP: https://valem.run/mcp/calculators (call `calculate` with calculator `new-zealand/car-tax`)