# Calcolo bollo auto — Italy car tax

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

Italy's annual car tax (bollo auto) is a kW-based charge plus a superbollo surcharge on power above 185 kW.

**Tax year:** 2026

## How it is calculated

The bollo auto is Italy's annual ownership tax, based on engine power in kilowatts and the car's emission class. The common rate is about 2.58 EUR per kW up to 100 kW and 3.87 EUR per kW above, with regions adjusting the figure by up to 10%.

Powerful cars also pay the superbollo: an extra 20 EUR per kW over 185 kW, a national surcharge that regions do not vary. Pick your region from the dropdown — Emilia-Romagna raised every rate by 10% from 1 January 2026, Abruzzo and Campania run up to 3.12 EUR/kW, and Bolzano charges 1.96 for Euro 6 cars. Estimate, not tax advice.

## Worked example

With Potenza of 88, this model computes Bollo annuo of 227.04 EUR.

## Inputs

| Name | Label | Type |
| --- | --- | --- |
| `kw` | Potenza (kW) | number |
| `regione` | Regione | string |
| `customFactor` | Coefficiente se « Altra » | number |

## Sources

- [Calcolo bollo — ACI](https://www.aci.it/i-servizi/servizi-online/bollo-auto.html) (checked 2026-08-02)

## What this page claims

The Valem engine reproduces this model's formula through 3 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/italy/car-tax.json
- Compute by URL: https://valem.run/calculators/italy/car-tax.json?kw=88
- MCP: https://valem.run/mcp/calculators (call `calculate` with calculator `italy/car-tax`)