Legalizing a car in Portugal takes five steps: a Category B inspection, the DAV customs declaration within 20 working days of entry, payment of the one-time ISV — Portugal's car import tax — Portuguese plates from the IMT within 60 days, and the annual IUC from then on. Cars from the EU pay no customs duty or VAT, only ISV; cars from outside the EU clear customs first. Below: every step with real deadlines and indicative costs for 2026.
Tax rates and deadlines change periodically — always confirm the final figures with the AT (Autoridade Tributária) and the IMT. Prefer not to handle it yourself? We do legalization turnkey — link at the end.
Who needs to legalize a car in Portugal
Legalization means moving the car from foreign plates to Portuguese ones while paying all the taxes due. It is mandatory if you have become a resident of Portugal and use the car permanently in the country. Tourists and those staying temporarily may drive on foreign plates, but only for a limited time.
Complexity and cost depend on where the car came from:
- From an EU country (Germany, France, Spain, Poland, etc.) — this is a transfer within the single market. There is no customs duty or VAT on entry; you pay only ISV and later IUC. This is the most common and simplest scenario.
- From a non-EU country (for example Ukraine, Moldova, the UK, Switzerland) — first you must clear the car through customs: pay customs duty and import VAT, and only then does the ISV story begin. This is slower and more expensive.
For people arriving from Ukraine there is an important nuance: on a change of residence you may qualify for an ISV exemption if you owned the car abroad for at least 6 months before moving and meet the other conditions. This relief requires its own document package filed with the AT — always confirm the current conditions, because the details change.
Step-by-step process: inspection, DAV, ISV, IMT
The key is not to miss the deadlines: a late DAV carries fines. Gather the documents — especially the CoC, which can take weeks — before the car arrives. By law, the DAV is due within 20 working days of the car entering Portugal, and IMT registration within 60 days.
Step 1. Bringing the car in and the inspection (Category B)
The car physically enters Portugal. It then passes a Category B technical inspection at an inspection center (centro de inspeções). This produces the Modelo 112, which confirms technical compliance. For the inspection you need the CoC (Certificate of Conformity) from the manufacturer, or a national homologation if no CoC exists.
Step 2. Submit the DAV within 20 working days
This is the most time-critical stage. The DAV (Declaração Aduaneira de Veículo), the vehicle customs declaration, is filed electronically on the Finances portal (Portal das Finanças) within 20 working days of the car entering the country. Filing the DAV is free, but it is what triggers the ISV calculation.
Step 3. Pay the ISV
After processing the DAV, the tax authority issues the ISV (Imposto Sobre Veículos) — the one-time tax for registering the car. You usually have to pay it within a few working days of issuance.
Step 4. Get Portuguese plates from the IMT (60-day deadline)
Once the ISV is paid, you request the assignment of a Portuguese plate from the IMT (Instituto da Mobilidade e dos Transportes). Registration must be completed within 60 days. You then receive the new document (DUA / Certificado de Matrícula) and order the physical plates.
Step 5. The annual IUC
Once the car is on Portuguese plates, the one-time payments end and the IUC (Imposto Único de Circulação) — the annual road tax — begins. It is paid every year in the month of first registration.
| Stage | What you do | Deadline |
|---|---|---|
| 1. Entry + inspection | Cat. B inspection, Modelo 112, CoC | right after entry |
| 2. DAV | File on the Finances portal | 20 working days |
| 3. ISV | Pay the one-time tax | per AT notice |
| 4. IMT registration | Portuguese plates, new document | 60 days |
| 5. IUC | Annual road tax | every year |
ISV: how the one-time tax is calculated when legalizing in Portugal
The ISV is the heaviest and least predictable payment, so calculate it before you buy the car. The tax is built from two main components:
- Engine displacement component (cilindrada) — depends on the engine size in cubic centimeters.
- Environmental component (CO2) — depends on carbon dioxide emissions; the dirtier the car, the higher the tax.
On top of that comes a diesel surcharge (diesel engines are taxed extra for particulate emissions). The age of the car, on the other hand, lowers the tax: the older the car, the bigger the discount on the age-reduction table (redução por idade).
Electric and hybrid cars get reliefs:
- Fully electric (EV) — exempt from ISV.
- Plug-in hybrids (PHEV) — discount of about −75%.
- Conventional hybrids — discount of about −40%.
The exact calculation is easier with a simulator — see our breakdown and ISV simulator to estimate the amount before the deal. If you browse cars on mobile.de or AutoScout24, the Clara Cars extension shows the ISV right on the listing. Do not confuse the ISV with the annual tax: we have a separate page on IUC.
How much it costs to legalize a car in Portugal: a cost breakdown
Beyond the ISV there is a set of mandatory smaller costs. Here is an indicative budget (figures are approximate and vary by region and provider):
| Item | Estimate, € | Note |
|---|---|---|
| ISV | variable | depends on displacement, CO2, fuel and age |
| Cat. B inspection (Modelo 112) | ~120 | inspection on import |
| CoC (certificate of conformity) | 100–250 | if missing, ordered from the manufacturer |
| IMT homologation | ~55 | when there is no CoC / national homologation |
| License plates | 25–40 | manufacture of the physical plates |
| DAV | 0 | filing the declaration is free |
| IUC | annual | road tax, paid every year |
For cars from outside the EU you add customs duty and import VAT, calculated on the value of the car — which is exactly why importing from Ukraine costs more than from the EU.
Documents to legalize a car in Portugal
The basic checklist of documents you will need at the various stages:
- CoC (Certificate of Conformity) or national homologation;
- foreign registration document of the vehicle;
- purchase invoice or sale contract;
- proof of transport (CMR, carrier invoice, tickets);
- NIF — Portuguese tax identification number;
- identity document (passport + residence permit / título de residência).
For cars from third countries you also need the customs clearance documents, and for an ISV exemption on change of residence, proof that you owned the car abroad for at least 6 months and that it was deregistered in the country of departure.
Common mistakes when legalizing
Most newcomers run into the same problems, and almost all of them are costly:
- Missing the 20-working-day DAV deadline. The most common and painful mistake: a late submission incurs fines. The count starts at entry, not when you decided to deal with the paperwork.
- Not calculating the ISV before buying. People buy a nice big-engine diesel abroad and then learn the ISV almost doubles the price. Always run the car through the simulator before the deal.
- Confusing ISV and IUC. The ISV is a one-time registration tax; the IUC is the annual road tax. They are two different payments and easy to mix up in your budget.
- Underestimating non-EU imports. Customs clearance with duty and VAT is a separate, more complex process than a simple transfer from the EU.
Get legalization done turnkey
If you do not want to wrestle with portals, deadlines and Portuguese acronyms, we take the process on. See our import and turnkey legalization service — we handle the inspection, file the DAV, calculate and pay the ISV and complete registration on time. If you do not have a car yet, we help with finding the right car in Portugal or abroad, factoring in the future ISV.
Useful related reading: is it worth importing a car in 2026 and the base guide to legalizing an imported car.
Frequently asked questions
How long does it take to legalize a car in Portugal?
On average from a few weeks to a couple of months. The key deadlines are set by law: the DAV must be filed within 20 working days of entry, and the whole IMT registration completed within 60 days. In practice much depends on having the CoC and on how busy the inspection centers are.
What is the difference between ISV and IUC?
The ISV is a one-time tax, paid only once when you register the car in Portugal. The IUC is the annual road tax you pay every year while you own the car. They are two independent payments; see the details of each on the ISV and IUC pages.
Can you avoid paying ISV when moving from Ukraine?
In certain cases yes — on a change of permanent residence there is an ISV exemption if you owned the car abroad for at least 6 months and met the other conditions. The relief is handled through the AT and requires supporting documents. Always confirm the current conditions, because they change.
What happens if you miss the 20-day DAV deadline?
A late DAV submission triggers fines from the tax authority. So file the declaration right after entry, without delay. If the deadline is already tight, it is better to hand the process to specialists to make the cutoff.
Does an imported car need its own inspection?
Yes. To register it, the imported car passes a Category B technical inspection, which produces the Modelo 112. This is a mandatory step before IMT registration and does not replace the periodic inspection the car will undergo later, once on Portuguese plates.
Disclaimer: tax rates, fees and deadlines in Portugal are revised periodically. Before submitting, confirm the current amounts and deadlines directly with the AT (Autoridade Tributária) and the IMT.