# Motor Tax Calculator Ireland — by CO2

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

Ireland's annual motor tax for post-2008 cars is set entirely by the car's CO2 emission band.

**Tax year:** 2025

> **Not yet updated for the current tax year.** Ireland’s motor tax rates were reported unchanged for 2026, but the official band table could not be retrieved to check this page’s figures against. Treat the result as indicative.

## How it is calculated

Motor tax in Ireland for cars registered from 2008 is based on CO2 emissions, in bands. A zero-emission car pays 120 EUR a year, rising through the bands to 2,400 EUR for the highest emitters.

Cars registered before 2008 pay by engine size instead. The calculator uses the CO2 table. Estimate, not tax advice.

## Worked example

With CO₂ emissions of 100, this model computes Annual motor tax of 170 EUR.

## Inputs

| Name | Label | Type |
| --- | --- | --- |
| `co2` | CO₂ emissions (g/km) | number |

## Sources

- [Motor tax rates (motortax.ie)](https://www.motortax.ie) (checked 2026-08-02)

## What this page claims

The Valem engine reproduces this model's formula through 2 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/ireland/car-tax.json
- Compute by URL: https://valem.run/calculators/ireland/car-tax.json?co2=100
- MCP: https://valem.run/mcp/calculators (call `calculate` with calculator `ireland/car-tax`)