How to Become an Irish Citizen: A Complete Guide for Portuguese Citizens

Can Portuguese citizens get Irish citizenship?

Yes, and as an EU national, it’s pretty straightforward compared to other non-EU applicants. You have the right to live and work in Ireland freely. And the time you spend there counts towards citizenship from the day you arrive and establish legal residence. You are not restricted by immigration stamps or visa categories. 

That said, EU residency does not automatically become Irish citizenship. You still need to apply, meet the residency requirements, and submit a complete set of documents. There are three main routes available to you:

1. Citizenship by naturalisation: for those who have lived in Ireland long enough

2. Citizenship by descent: for those with Irish-born parents or grandparents

3. Citizenship through marriage: for those married to or in a civil partnership with an Irish citizen

Each route has its own requirements, and the right one for you depends on your personal circumstances.

The routes to Irish citizenship for Portuguese nationals

Citizenship by naturalisation

This is the most common route for Portuguese citizens who have built a life in Ireland. To qualify, you must meet the “5 in 9” rule. This means that within the nine years before your citizenship application, you must have spent at least five years legally living in Ireland.

The remaining four years do not need to be spent in Ireland continuously. You may have lived abroad, travelled, or not yet moved to Ireland during that time. What matters is that you can show a total of five years of reckonable residence within that nine-year period, including one continuous year of residence immediately before applying.

There is also a 70-day rule to be aware of. In the 12 months immediately before your citizenship application, you should not spend more than 70 days outside Ireland. Immigration authorities calculate these absences carefully, so it is important to keep a clear record of your travel dates, including holidays, work trips, and visits abroad.

As an EU citizen, your reckonable residence is established through document evidence such as; bank statements, payslips, lease agreements, utility bills, and similar records, rather than immigration stamps. You will need to show evidence for each qualifying year.

A few other conditions apply:

• You must be at least 18 years old

• You must be of good character (assessed via a Garda vetting check)

• You must intend to continue living in Ireland after being granted citizenship

• You must be willing to attend a citizenship ceremony and make a Declaration of Fidelity to the Nation

There is no language test and no civic knowledge exam required for naturalisation. As of 2026, Ireland remains one of the few EU countries with no formal test requirement.

Recommended Reading

How to Become an Irish Citizen Through Naturalisation

Citizenship by descent (through an Irish parent or grandparent)

If you have Irish ancestry, you may be entitled to Irish citizenship without having to meet the standard residency requirements at all.

If one of your parents was born in Ireland, you may already be an Irish citizen by birth and can apply directly for an Irish passport without going through naturalisation.

If one of your grandparents was born in Ireland (but neither of your parents was born there), you can apply to have your birth registered on the Foreign Births Register (FBR), which is maintained by the Department of Foreign Affairs. Once registered, you are formally recognised as an Irish citizen and can then apply for a passport.

Feel free to explore this route even if you are not certain of your Irish ancestry. Many Portuguese families have connections to Ireland that have not been formally documented. 

For this route, you will need to provide the birth and marriage certificates of your Irish-born ancestor. If any of those documents were issued in Portuguese, they will need to be accompanied by a certified English translation before they can be accepted by the Department of Foreign Affairs. 

Note: The current processing times for FBR applications are approximately nine months.

Citizenship through marriage or civil partnership

If you are married to, or in a civil partnership with, an Irish citizen, you can apply for naturalisation after just three years of reckonable residence on the island of Ireland, rather than the standard five years. Northern Ireland counts toward this requirement, which is a useful flexibility for some applicants.

To qualify through this route, you must also have been married or in the civil partnership for at least three years, and you must have lived on the island of Ireland for three out of the five years before your application date.

Your marriage certificate will be a key document in this application. If your marriage took place in Portugal, your Portuguese marriage certificate will need to be submitted alongside a certified English translation.

Recommended Reading

How to Get Married in Ireland as a Foreigner

Residency requirements explained

Reckonable residence is simply the time you have spent legally living in Ireland that counts towards your citizenship application. Not every period in Ireland qualifies, only time spent under certain conditions is recognised by the Irish Immigration Service Delivery when they assess your application.

For Portuguese citizens, all periods of legal residence in Ireland count towards your five-year requirement, without restriction. However, the following periods do not count as reckonable residence, regardless of your nationality:

• Time spent in Ireland on a student visa

• Time spent awaiting a decision on an International Protection application

• Any period during which your permission to remain had expired

If you hold or have previously held an Irish Residence Permit (IRP) card, check the expiry dates carefully. Any gap between the expiry of one permission and the start of the next is not counted.

Before you apply, use the Naturalisation Residency Calculator on the ISD website (irishimmigration.ie) to calculate your reckonable time and know if it’s enough to apply for citizenship. The calculator is designed for non-EU and non-EEA nationals. As a Portuguese citizen, you will need to demonstrate your residence through documentary evidence rather than stamp records, but the calculator can still be useful as a rough check.

Practical note: As an EU citizen, your right to live in Ireland does not expire. However, for citizenship purposes, you still need to document each year of your stay. Start collecting bank statements, payslips, utility bills, and lease agreements from day one.

Documents required for an Irish citizenship application

The exact documents required depend on which route you are applying through, but the core requirements include:

Identity documents:

• Copy of your current passport (biometric page)

• Identity documents with a total of 150 points on the ISD Citizenship Identity Scorecard (your passport alone may be sufficient)

Residency evidence (one or more of the following for each qualifying year):

• Payslips or employment letters

• Bank statements showing an Irish address

• Lease agreements or mortgage statements

• Utility bills

• Letters from Irish government bodies (Revenue, Department of Social Protection, etc.)

Other required documents:

• Completed statutory declaration (witnessed by a solicitor, notary, or commissioner for oaths)

• Evidence of good character (Garda vetting, completed online via the ISD portal)

• Marriage certificate with certified translation, if applying on the marriage route

• Birth certificates with certified translations, if applying through descent

Note: All documents submitted to Irish immigration authorities must be in English or Irish. Any document originally in Portuguese or any other language, must be accompanied by a professional certified translation.

When certified translations are required

You’ll typically need certified translations in Ireland when your official documents are in Portuguese and you need to submit them to an authority in Ireland for your citizenship application. 

According to the Irish Immigration Service Delivery (ISD) and the Department of Foreign Affairs, all documents not in English or Irish be accompanied by a professional certified translation.

The most common documents requiring certified translation include:

• Birth certificates 

• Marriage or civil partnership certificates 

• Divorce decrees (where applicable)

• Portuguese police clearance certificates

The translation must be completed by a professional translator and include a Certificate of Accuracy, which is a signed statement from the translator confirming that the translation is complete and accurate. This certificate must accompany every translated document you submit.

Irish immigration authorities do not accept machine translations (such as Google Translate or DeepL), nor translations produced by the applicant themselves or by family members. The translator must be independent and professionally qualified.

Application process: step by step

Applying for Irish citizenship involves several stages, and the process takes longer than many people expect. Here’s how to apply; 

1. Check your eligibility 

Before gathering any document, confirm that you actually qualify. Use the Naturalisation Residency Calculator on the ISD website and review the official How to Become an Irish Citizen guide by the Irish Government. Pay particular attention to your reckonable residence total and the 70-day absence rule for the 12 months before your intended application date.

2. Gather your documents 

Collect residency evidence for every qualifying year, not just the most recent one. Bank statements, payslips, lease agreements, and utility bills are all accepted. The more consistent and complete your evidence, the smoother your application will be.

3. Arrange certified translations 

If any of your supporting documents, such as your birth certificate, marriage certificate, or police clearance, are in Portuguese, make sure to translate them into English before you submit. Do not leave this step until the last minute, as turnaround times vary by provider.

4. Submit your application online 

Upload your documents, complete the required forms, and submit your statutory declaration,  which must be signed and witnessed by a solicitor, notary, or commissioner for oaths before upload.

5. Pay the application fee 

The non-refundable application fee of €175 is payable at the point of submission. Your application will not be processed without it.

6. Complete e-vetting 

Once your application has been received, the ISD will invite you to complete a Garda vetting check online. This is part of the good character assessment and is handled digitally, you do not need to attend in person.

7. Await a decision 

Processing times currently run at approximately 12 to 19 months from the date of submission. You can monitor the status of your application through the ISD Customer Service Portal. Incomplete applications or missing translations are the most common causes of delays, which is why a thorough submission from the outset is so important.

8. Attend a citizenship ceremony 

If your application is approved, you will be invited to attend a citizenship ceremony. This is the final and compulsory step in the process. At the ceremony, you will make a Declaration of Fidelity to the Nation and Loyalty to the State. Only once this declaration has been made are you formally recognised as an Irish citizen.

9. Apply for your Irish passport 

Irish citizenship and an Irish passport are two separate things. If you want an Irish passport, you will need to submit a separate passport application after your ceremony. Keep all your citizenship documents safe, as you will need some of them again at this stage.

Costs and fees

Here’s a breakdown of the main expenses you may encounter during the process;

Dual citizenship: do you have to give up your Portuguese passport?

No. Under Irish law, you are not required to renounce your Portuguese citizenship in order to become an Irish citizen. Ireland permits dual citizenship, whether you apply through naturalisation, descent, or any other route.

Portugal also generally allows dual nationality, meaning most Portuguese citizens can hold both passports simultaneously. However, you may have to confirm your specific situation with the Portuguese consulate before you apply, as individual circumstances can vary.

Once you have been granted Irish citizenship, you can apply for a Stamp 6 in your Portuguese passport. This stamp confirms your right to live in Ireland without time conditions as a dual citizen.

Processing times

Current processing times for Irish citizenship applications are as follows:

• Naturalisation applications: approximately 12 to 19 months from the date of submission

• Foreign Births Registration: approximately 9 months

Ireland has been making progress in reducing its application backlog, and the online application portal has helped streamline submissions considerably. 

Common mistakes to avoid

• Miscounting reckonable residence: Not all time in Ireland qualifies. Time spent on a student visa or waiting for an International Protection decision does not count.

• Exceeding the 70-day absence limit: If you spend more than 70 days outside Ireland in the 12 months before your application, it can make you ineligible.

• Submitting Portuguese documents without a certified translation: This will delay or invalidate your application.

• Using uncertified translations: Machine translations and self-made translations are not accepted by Irish immigration authorities.

• Insufficient residency evidence: You need documentary proof for every qualifying year, not just the most recent one.

• Applying before you are eligible: The €175 application fee is non-refundable, so double-check your qualifying period before submitting.

• Missing name-change documents: If your name has changed since birth (through marriage or deed poll), you must include the relevant certificate, with a certified translation if it is in Portuguese.

How Translayte can help

If any of your key documents like birth certificate, marriage certificate, or Portuguese police clearance were issued in Portuguese, you will need certified English translations before you can submit your citizenship application.

Translayte provides certified translations of Portuguese documents for Irish immigration applications, including for submissions to the Irish Immigration Service Delivery and the Department of Foreign Affairs. All translations include a signed Certificate of Accuracy and are handled by qualified professional translators. Fast turnaround options are available for those working to application deadlines.

Getting your translations right the first time is one of the simplest ways to keep your application on track.

Upload your document for a free quote to get started.