Buying a car in Portugal is straightforward once you separate three different jobs: checking the car, transferring legal ownership, and keeping the vehicle legally on the road. If the car currently has foreign plates, there is an additional legalisation process—and that can be surprisingly expensive even when the car comes from another EU country.

Buying a Portuguese-registered car

For a car already on Portuguese plates, the key legal step after the sale is the registo automóvel: the ownership record must be changed. Current Justiça/gov.pt guidance gives a 60-day deadline from the sale. Do not treat possession of the keys, a bank transfer or a signed sales paper as a substitute for updating the official register.

You can use Automóvel Online where the transaction is eligible, or deal with the registration through a Conservatória do Registo Automóvel / Loja de Cidadão. Justiça states that online vehicle registration is 15% cheaper than the equivalent in-person request.

Before paying for a used car

  • Confirm that the seller is actually entitled to sell it.
  • Check the registration/vehicle details against the car and documents.
  • Consider ordering the certidão permanente do registo automóvel. It shows current registrations and pending requests and can reveal registered charges/encumbrances.
  • Check the VIN/chassis number and compare it with the documentation.
  • Ask for maintenance and inspection history rather than relying only on mileage.
  • Check when the next IPO inspection is due; guide #102 covers inspections in detail.
  • Get an insurance quote before committing, particularly for an unfamiliar model or a newly arrived driver.
  • If buying from a business, understand the consumer-guarantee position; a private-to-private sale is not the same consumer transaction.

Ownership transfer: do it promptly

The buyer is normally the obvious person to register the transfer, but Portuguese law also gives the seller routes to protect themselves if the buyer fails to update ownership. That matters because leaving a sold vehicle registered in the seller’s name can create a mess involving taxes, fines and responsibility for a vehicle the seller no longer controls.

For both sides, the sensible approach is to complete or initiate the ownership transfer as part of the sale and keep evidence of the transaction.

The DUA / Certificado de Matrícula

The Documento Único Automóvel (DUA), also called the Certificado de Matrícula, identifies the vehicle and records information including the registered owner. A new/updated certificate is issued following relevant registration changes. Keep the legal ownership register, DUA, insurance and inspection status conceptually separate: they interact, but they are not the same thing.

Foreign plates: yes, you may have to change them even if the car comes from the EU

A common and expensive surprise: EU free movement does not mean that you can permanently move a car from another EU country to Portugal and simply keep its old plates without Portuguese registration and vehicle-tax formalities.

If Portugal becomes the car’s country of normal use/residence, you may need to legalise it here, obtain a Portuguese matrícula (registration number/plates), register the vehicle and pay the taxes that apply. EU rules abolish customs duties between Member States, but vehicle registration taxes are not harmonised across the EU. The EU’s own Your Europe guidance specifically explains that a Member State may levy a registration tax when a passenger car is first registered there, subject to EU-law constraints.

In Portugal that tax is ISV — Imposto sobre Veículos. For cars, the calculation depends principally on characteristics including engine capacity and CO₂ emissions. That means legalising some combustion cars can be very expensive, even when you bought the car legally in Spain, France, Germany, the Netherlands or another EU Member State and already paid taxes there. “Free movement of goods” is therefore not the same thing as “free Portuguese registration”.

For a used vehicle brought from another country, IMT is responsible for assigning the Portuguese registration number. Vehicles with European type approval are generally easier to process when the required European approval data / Certificate of Conformity are available.

Changing foreign plates: the process in broad terms

  1. Check tax status immediately. AT/gov.pt currently says the vehicle-tax process for a vehicle bought abroad generally has to be dealt with within 20 working days after the vehicle enters Portugal.
  2. Gather the foreign vehicle documents, proof of ownership/purchase and technical/type-approval information such as the COC where required.
  3. Deal with the DAV and ISV position through the Portuguese tax/customs process. Do not assume “EU car” means zero ISV.
  4. Complete any required technical/inspection step for the particular vehicle.
  5. Apply for Portuguese registration/matrícula through IMT.
  6. Have physical Portuguese number plates made once the Portuguese registration number has been assigned.
  7. Arrange Portuguese-compliant insurance and registration.
  8. Complete the vehicle ownership registration and obtain the DUA/Certificado de Matrícula. Gov.pt states that after the Portuguese matrícula has been assigned, vehicle registration is compulsory and must be requested within 60 days.
  9. Deal with IUC and ongoing inspection/insurance obligations.

This is only the overview. #101 Importing a car into Portugal gives the complete foreign-car legalisation sequence, including DAV, ISV, COC/homologation, inspection, IMT and registration.

But there is an important ISV exemption when genuinely moving to Portugal

Do not pay a large ISV bill without first checking whether you qualify for the transfer-of-residence exemption. Current Portuguese tax guidance says a person transferring residence to Portugal can qualify if, among other conditions, they are over 18, had lived in the previous country for at least six months before the transfer, and had owned the vehicle for at least six months before transferring residence. Other statutory conditions, evidence and deadlines apply.

This exemption is extremely valuable because otherwise the ISV on some cars can make importing them economically unattractive. Check eligibility before planning the move or selling/replacing the car. AT currently states that the transfer-of-residence ISV exemption is available only once in each 10-year period for the same beneficiary.

Temporary use of another EU country’s plates is different

A person whose normal residence remains outside Portugal can fall under temporary-admission rules. AT currently describes a regime allowing qualifying EU-registered vehicles to remain/circulate in Portugal for up to six months, consecutive or not, in a 12-month period, where the vehicle is registered to a person without normal residence in Portugal and the other conditions are met.

That is not a loophole for somebody who has actually moved their normal residence to Portugal. Residency and vehicle-use facts matter. Keeping foreign plates simply because the foreign road tax or insurance is cheaper can create serious tax and registration problems.

Buying a car elsewhere in the EU specifically to bring to Portugal

Calculate the Portuguese landing cost before buying. A cheap used car in Germany, France, Spain, Belgium or the Netherlands is not necessarily cheap after transport, temporary/export plates where relevant, inspection/technical paperwork, ISV, registration and Portuguese plates.

VAT is a separate issue from ISV. For EU VAT purposes, a vehicle can count as new if it is supplied within six months of first use or has travelled no more than 6,000 km. Different VAT treatment can therefore apply even to a vehicle somebody casually describes as “second-hand”. For an older used EU car, Portuguese VAT is not simply charged again merely because it crosses the border, but Portuguese registration taxes can still apply.

Portuguese registration does not end the costs

After purchase/registration you still need to think about:

  • IUC — the annual vehicle circulation tax where applicable;
  • motor insurance — compulsory liability cover and any optional additional cover;
  • IPO inspection — according to the vehicle’s category and age;
  • tolls — including electronic toll systems and Via Verde;
  • maintenance, tyres, parking and municipal resident-parking schemes.

See #102 IPO inspection, IUC and car insurance and #103 Portuguese toll roads and Via Verde.

A simple buying checklist

  • Portuguese plates already? Verify the vehicle and ownership record.
  • Foreign plates? Calculate the full Portuguese legalisation/ISV cost first.
  • Moving your own car to Portugal? Check the transfer-of-residence ISV exemption before doing anything irreversible.
  • Check the VIN and documents.
  • Check registered charges/encumbrances.
  • Inspect/test the car and review maintenance/IPO history.
  • Agree price and payment method.
  • Keep a written record of the sale.
  • Complete the ownership registration within the legal deadline.
  • Arrange valid insurance before driving.
  • Diary the next IPO, IUC and insurance dates.

Useful official links

Last verified: 2 October 2026. Vehicle tax and registration costs can be substantial and depend on the individual vehicle and circumstances. If bringing a foreign-plated car, check the current AT and IMT procedure before the vehicle enters Portugal where possible.