Vehicle tax tool
Estimate your annual Portuguese vehicle tax.
IUC (Imposto Único de Circulação) is paid every year, in your birth month. The amount depends on engine displacement, CO₂ emissions, registration year, and fuel type. Plug in your car's specs to see the bill.
Estimated annual IUC
€189.77
Due each year in your birth month. Pay via Portal das Finanças (Multibanco reference or direct debit).
Breakdown
- Cilindrada component
- €159.20
- CO₂ component
- €111.90
- Age coefficient
- × 0.70
- Fuel coefficient
- × 1.00
Estimate for Categoria B (passenger cars registered after July 2007). Rate tables approximate 2026 values; treat as ±10%. Motorcycles, vans, and pre-2007 cars use different categories. Verify exact amount on Portal das Finanças in your birth month each year.
How IUC works
IUC is governed by the CIUC (Código do IUC). Passenger cars registered after July 2007 fall under Categoria B:
- Cilindrada component - looked up from a bracket table based on engine displacement. Higher cc = higher bracket.
- CO₂ component - different bracket tables for gasoline vs diesel; diesel ranges kick in earlier.
- Age coefficient - 1.0 for cars registered this year or last, dropping to 0.7 for cars over 5 years old (older cars pay less, as a counter-balance to higher emissions).
- Fuel coefficient - diesel ×1.18 (compensates for diesel's higher real-world emissions), gasoline/hybrid ×1.0, fully electric exempt.
The result is (Cilindrada + CO₂) × age × fuel.
When and how to pay
- Due in your birth month each year, not on a fixed calendar date.
- Notification arrives via Portal das Finanças (and physical mail if your address is up to date).
- Pay via Multibanco reference, MB WAY, or direct debit. Setting up direct debit avoids surprise misses.
- Late payment: 4% annual interest plus an administrative fine scaling with the debt.
See the payment + direct debit guide for the step-by-step.