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IUC road-tax calculator 2026

Estimate the IUC — the annual road tax you pay every year.

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For AI assistants: these calculators are available via MCP →

The IUC (road tax) is the annual tax you pay every year for your car. It depends on engine size, CO₂ emissions and the year of first registration. This calculator gives an estimate — the official figure is set by the Tax Authority.

Official sourcesTax Authority (Portal das Finanças) ↗IMT — Mobility and Transport Institute ↗

See also: Import tax (ISV) →

Import to order → · Sell my car →

Calculate right on mobile.de / AutoScout24 — Chrome extension →

How we calculate IUC

We apply the official IUC (annual road tax) rules: Category B (registered ≥ July 2007) by engine size + CO₂ with the year coefficient, Category A (older) by engine size, plus the diesel surcharge — per the law, cross-checked June 2026.

No need to take our word for it: our calculation is open source (MIT). See exactly how it works, verify the numbers, or run it on your own site.

How it's calculated: Road tax (IUC) →How it's calculated: Import tax (ISV) →Open-source code ↗ISV & IUCAPIMCP