In a previous Autotouring article, I told you about my journey from southern Portugal to Luxembourg at the wheel of my Mazda MX-5. What I didn’t explain was why I had decided to bring the car back to the Grand Duchy. My original plan was to register it in Portugal and enjoy a convertible under the Algarve sun, but I had reckoned without Portuguese motor taxation! Despite being 26 years old, my 1.8-litre MX-5, rated at 232 g CO₂/km, would still have faced almost €3,700 in ISV, even after an 80% age-related reduction. Enough to seriously cool my ambitions! So I gave up on Portuguese registration and decided to bring it back to Luxembourg. A decision that ultimately gave me a superb road trip! It wasn’t my first experience, though, as I had already successfully imported my father’s car into Portugal. Together, these two experiences made me want to share some practical advice on a subject that concerns many Autotouring readers, particularly within its Portuguese community.

ISV: no way around it

Unlike Luxembourg, Portugal levies a tax on registration (Imposto sobre Veículos, or ISV), calculated mainly on engine capacity and CO₂ emissions. The higher these values, the bigger the bill. Used vehicles previously registered in another EU country do, however, benefit from a sliding reduction based on age, reaching up to 80% after ten years. The powertrain also plays a decisive role, as fully electric cars are exempt from ISV, while some hybrids qualify for reductions subject to CO₂ emissions and electric range criteria. A ‘Hybrid’ badge alone therefore guarantees no tax advantage.

First tip:always run an ISV simulation before buying or transferring a vehicle. A bargain in Luxembourg can quickly lose its appeal once Portuguese taxes are added.

Moving back to Portugal for good: an exemption is possible

This is probably the most interesting case for Portuguese nationals living in Luxembourg who are considering returning home, particularly on retirement. When you transfer your normal residence to Portugal, a full ISV exemption is possible under certain conditions. In particular, you must have lived abroad for at least six months and owned the vehicle for at least six months before the move. Buying a car a few weeks before leaving will therefore not qualify! The application must be submitted within twelve months of the change of residence. The exemption is limited to one vehicle per person and, among other conditions, the car may not be sold, given away, rented out or lent during the first twelve months after Portuguese registration. Be careful not to confuse a transfer of residence with a stay in a second home. If you keep your normal residence in Luxembourg, your Luxembourg-registered vehicle may, under certain conditions, be driven temporarily in Portugal for up to six months in any twelve-month period without having to be registered there.

What about VAT? Watch out for six months and 6,000 km!

Buying a used car in another EU country does not normally trigger new VAT in Portugal. But the car must still count as used for tax purposes! For that, it must have been first registered more than six months ago and have covered more than 6,000 kilometres. If either condition is missing, the vehicle is treated as new for tax purposes. In an intra-Community acquisition, VAT is then normally due in the country of destination, which means 23% in mainland Portugal. So a two-year-old car showing just 5,000 km is still new in the eyes of the taxman! Simply transferring a vehicle the owner already has, with no new transaction, is a different situation and does not automatically trigger new VAT.

Against the clock: 20 working days!

For a permanent import, the Declaração Aduaneira de Veículo (DAV) must be filed with the Portuguese tax authority within 20 working days of the vehicle entering the country. Missing the deadline can lead to penalties. If you drive the car yourself, keep proof of its arrival date. If you use a professional carrier, ask for the transport document (CMR) and proof of payment. Either way, it is best to prepare the paperwork before setting off!

Plates, insurance and formalities

If your car is already registered in Luxembourg, you can generally make the journey on your usual plates and insurance, provided they remain valid. You will then need to coordinate Portuguese registration with deregistration at the SNCA. If the vehicle is no longer registered, arrange suitable temporary plates and insurance valid in every country you cross, or use a transport company.

In Portugal, the procedure includes identification and type approval of the vehicle, the required roadworthiness inspection, filing the DAV, paying any ISV due and registration with the IMT (Instituto da Mobilidade e dos Transportes). You will also need insurance and to pay IUC, the annual vehicle tax. The main documents required are the Luxembourg registration certificate, the European certificate of conformity (COC), proof of ownership and, where applicable, documents supporting an exemption application.

Calling in a professional: money well spent

Between the tax authority, inspection, type approval and registration, the procedure can quickly become tedious, especially if you still live in Luxembourg. Many Portuguese agencies specialising in legalização automóvel handle most of the formalities for a few hundred euros in fees, excluding taxes and administrative charges. It is a solution I recommend, particularly if you are not familiar with local procedures. Remember to ask for a quote detailing the services included.

Before hitting the road, get the calculator out!

Importing a car into Portugal can make sense, notably for an electric or hybrid vehicle, a used car qualifying for a large ISV reduction, or when a change of residence entitles you to an exemption. But for some petrol and diesel models, the bill can quickly outweigh the hoped-for savings. Before making any decision, run an ISV simulation and find out about the formalities.

As for my MX-5, it ended up back in Luxembourg rather than basking in the Portuguese sun. But that decision gave me a superb journey of more than 2,000 kilometres. Rather a pleasant consolation for a car enthusiast!