🇵🇹 Portugal car tax calculator (IUC)
Portugal's annual car tax (IUC) for post-2007 cars combines an engine-size and a CO2 component.
✓ Verified against 3 self-test cases Updated for 2026 · sources checked 2026-08-02
How iuc in Portugal is calculated
The IUC (imposto unico de circulacao) is Portugal's annual car tax. For cars registered from July 2007 it combines a component for engine displacement and one for CO2 emissions, scaled by a registration-year coefficient.
Diesel cars carry a surcharge. This model estimates the charge from CO2 bands. Older cars use an engine-and-age table. Estimate, not tax advice.
Worked example
| cc | 1395 |
|---|---|
| co2 | 109 |
| anoMatricula | 2019 |
| gasoleo | no |
| eletrico | no |
| taxaCilindrada | 63.74 |
| taxaCo2 | 65.15 |
| coeficiente | 1.15 |
| adicionalGasoleo | 0 |
| iuc | 148.22 |
Frequently asked questions
How much IUC for a 120 g/km car?
In the illustrative CO2 bands a 120 g/km car is around 120 EUR; higher emitters pay more, and diesels add a surcharge.
What determines the IUC?
Engine size and CO2 for post-2007 cars, scaled by the year of first registration.
Do diesels pay more?
Yes — a diesel surcharge is added to the CO2 component.
Sources
- Código do IUC — Portal das Finanças · checked 2026-08-05
- Tabelas IUC 2026 — DECO PROteste · checked 2026-08-05
Estimate. Not tax advice. The verification badge means the model reproduces the stated formula through 3 self-test cases; the sources support that the formula matches the rules.
Related calculators
IUC in Spain · France · Italy · All Portugal calculators · All calculators
Fork this model in the Valem sandbox →
Built with Valem — a live, verifiable calculator you can fork and embed.