# Car Tax Calculator UK — Vehicle Excise Duty (VED)

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

UK vehicle tax is a first-year rate set by CO₂ emissions, then a £200 standard rate from year two, plus a £440 supplement for cars listed over £40,000.

**Tax year:** 2026-27

## How it is calculated

The UK charges Vehicle Excise Duty in two stages. The first-year rate is set entirely by the car's CO₂ emissions, running from 10 GBP for zero-emission up to several thousand pounds for the highest-emitting cars.

From the second year, almost every car pays the same 200 GBP standard rate for 2026-27. Cars with a list price over 40,000 GBP also pay a 440 GBP expensive-car supplement in years two to six; for electric cars registered from 1 April 2026 that threshold is 50,000 GBP.

The calculator takes CO₂ and list price and shows both the first-year rate and the ongoing standard rate. It is an estimate for a standard petrol/diesel car; alternative-fuel discounts and the newest EV rules are planned refinements. Not tax advice.

## Worked example

With CO₂ emissions of 128, this model computes Standard rate of 200 GBP.

## Inputs

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

## Sources

- [GOV.UK — Vehicle tax rate tables](https://www.gov.uk/vehicle-tax-rate-tables) (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/uk/car-tax.json
- Compute by URL: https://valem.run/calculators/uk/car-tax.json?co2=128
- MCP: https://valem.run/mcp/calculators (call `calculate` with calculator `uk/car-tax`)