Proof of tax address: when you need it and how to obtain it

What this address is

Your tax domicile is the address registered with the Tax Authority (Finanças) for notifications and tax purposes. It is the address on your record with the Tax and Customs Authority (Autoridade Tributária e Aduaneira), and it may differ from the address where you actually live or from the one shown on other documents.

So when an organisation asks for "proof of address", it is worth finding out whether they want proof of where you live (such as a utility bill) or your registered tax address. These are different things.

When it is requested

It is commonly requested in loan applications, when opening accounts, in other applications and in dealings with public bodies or organisations that need to confirm your tax identification. Your bank may ask for recent proof and may not accept a document that is too old.

Anyone who lives in Portugal and is a tax resident must keep their tax domicile up to date at all times. If you have moved house and not reported it, notifications from the Tax Authority (Finanças) may be sent to an old address, which can affect deadlines.

How to obtain it

The Tax Portal (Portal das Finanças) allows you to view and obtain documents showing your registered tax address, once you have logged in as a taxpayer. The portal's section names and navigation paths change from time to time, so look under the taxpayer registration services or under certificates and documents.

Some documents you already have also show your address: your IRS return, for example, states your tax domicile as at the date of submission. If the organisation accepts it, this may be an alternative, but please check first.

Changing your tax address

If your address is out of date, you can change it on the Tax Portal (Portal das Finanças), at a tax office or, in many cases, by updating your Citizen Card (Cartão de Cidadão), which is generally reported to the Tax Authority automatically. Always check afterwards that the change has been registered, and request new proof.

If you are an emigrant, have two homes or live in rented accommodation, specific rules apply to choosing your tax address. If in doubt, please speak to your accountant.

Practical example

Titus Gorila moved house two years ago and updated his Citizen Card (Cartão de Cidadão), but never checked his details with the Tax Authority (Finanças). When he applied for a loan, the bank asked for proof of his tax address, and it still showed the old one. He sorted out the change before the assessment and avoided a delay. The lesson: check your tax address before the bank does. Titus Docs can obtain the proof for you, with your consent.