How to Get Irish Citizenship: Birth, Descent, and Residency

You can get Irish citizenship through four routes: birth on the island of Ireland, descent from an Irish parent or grandparent, marriage or civil partnership with an Irish citizen, or five years of legal residence. Which one applies depends on where you were born and who your Irish relatives were. Ireland allows dual citizenship, so keeping your current nationality is not a problem.¹

If You Were Born on the Island of Ireland

Anyone born on the island of Ireland, north or south, before January 1, 2005, is automatically an Irish citizen. No application, no registration.²

For births on or after that date, at least one parent must have met one of these conditions when you were born:

Held Irish or British citizenship.
Had the right to live in Ireland or Northern Ireland without immigration restrictions.
Had legally lived in Ireland for three of the four years immediately before the birth.

A child born in Ireland after 2005 who does not meet those conditions is not automatically a citizen, but a parent can apply for naturalization on the child’s behalf once the child has completed one continuous year of residence immediately before the application plus two more years within the previous eight.³

If a Parent Was Born in Ireland

If either of your parents was born on the island of Ireland, you are already an Irish citizen. You do not have to register anywhere. You will, however, need your parent’s Irish birth certificate when you apply for a passport.⁴

If a Grandparent Was Born in Ireland

If your Irish connection skips a generation, so that a grandparent was born in Ireland but neither parent was, you can claim citizenship by registering on the Foreign Births Register (FBR). This route is not automatic. You are only considered Irish from the date your registration is completed, not from your birth.⁵

One timing rule matters more than any other. If you want your own children to be eligible to become Irish through the same grandparent, you must complete your FBR registration before those children are born. A child born to a parent who has not yet registered cannot use that Irish grandparent later. The window closes for good.⁴

A grandchild application typically needs:

Your original birth certificate.
Your Irish-born grandparent’s original birth certificate.
The original birth certificate of the parent who connects you to that grandparent.
Marriage certificates for the parent and grandparent, where relevant.
Certified photo ID for you and each living relative in the chain.
Death certificates for any deceased relatives in the chain.
Four passport-sized photos, two witnessed.
Two proofs of your current address.

If the parent you claim through was themselves registered on the FBR rather than born in Ireland, you also need their Foreign Birth Registration Certificate.⁵

The fee is €278 for adults and €153 for children under 18. Applications are processed in strict date order, and the current wait is around 12 months.⁴

If Your Irish Ancestor Is Further Back

If your closest Irish-born relative is a great-grandparent, the FBR route does not apply. Section 16 of the Irish Nationality and Citizenship Act 1956 gives the Minister for Justice discretion to grant citizenship to someone with “Irish associations.”⁶ The statute leaves the phrase undefined, and Immigration Service Delivery published guidelines in December 2025 on how the Minister weighs these applications. Approval is not guaranteed, and current processing exceeds 30 months.⁷

If You Have Lived in Ireland for Five Years

Without an Irish birth or family link, residence is the way in. Standard naturalization requires five years of reckonable residence within the previous nine years, including one continuous year immediately before you apply.⁸

Not every year in Ireland counts. Time spent on a student permission (typically Stamp 2 or Stamp 2A) is not reckonable for standard adult applications. EU and EEA nationals, who do not carry immigration stamps, prove their residence through employment records, tax documents, and utility bills.⁸

Beyond residence, you must be of “good character.” The Department of Justice runs a background check through An Garda Síochána covering criminal records and tax compliance. You also declare your intention to keep living in Ireland after naturalization. The Minister for Justice has absolute discretion, though applications that clearly meet the conditions generally go through.

If You Are Married to an Irish Citizen

Spouses and civil partners of Irish citizens have a shorter track: three years of reckonable residence on the island of Ireland, made up of one continuous year immediately before applying plus two more years within the previous four. The marriage or civil partnership must have lasted at least three years, and you must be living together.³

Residence here counts across the whole island, so time in Northern Ireland is included. The marriage must be legally recognized in Ireland, and foreign marriage documents may need translation and certification. Good character, intention to reside, and the Garda check all apply the same way.

How the Application Works

Immigration Service Delivery pushes applicants toward the Online Form Portal for naturalization and says it cuts the wait significantly. Paper Form 8 is still accepted but is only available on request through the Customer Service Portal. All applications are sent to the citizenship office in Tipperary Town, and any physical documents that cannot be uploaded go there by post.³⁹

Residence is proved through a scorecard. You need 150 points for each year claimed, using documents with predetermined values, and at least one Type A and one Type B document per year. High-value identity items include your passport and original birth certificate; residence evidence includes Revenue tax summaries, Department of Social Protection letters, and utility bills.¹⁰

The application fee is €175 and is not refunded if the application fails. If you are approved, a certification fee is due before the certificate is issued: €950 for a standard adult, €200 for a minor, €200 for the widow, widower, or surviving civil partner of an Irish citizen, and no fee for a refugee or stateless person.

Most naturalization applications are processed in about 19 months.⁸ You get an acknowledgment letter after filing, then Garda e-vetting runs in the background. Approved applicants are invited to a citizenship ceremony, where a declaration of fidelity to the Irish nation and loyalty to the State is made. The certificate of naturalization arrives by registered post after the ceremony.¹¹

Dual Citizenship

Ireland places no restrictions on holding another nationality alongside Irish. You do not have to renounce anything to become Irish, and later taking another citizenship does not cost you your Irish status. This applies to every route above.¹ An Irish passport also carries the right to live and work in any EU or EEA country.

Keeping Naturalized Citizenship

Citizenship by birth or descent is essentially permanent. Citizenship obtained through naturalization can be revoked by the Minister for Justice under Section 19 of the 1956 Act on limited grounds: fraud or concealment in the original application, an overt act showing failure of fidelity to the nation or loyalty to the State, or living outside Ireland continuously for seven years without filing Form 5 each year to declare an intention to retain citizenship. The seven-year rule does not apply if naturalization was granted on the basis of Irish descent or Irish associations. Since April 2025, the Minister must issue a notice of intention to revoke, and the person has 28 days to respond in writing; an independent committee can be asked to review any revocation decision.

The seven-year rule is the one that catches people. If you naturalize and then move abroad, filing Form 5 with an Irish diplomatic mission each year is the small step that protects the status.

1
Immigration Service Delivery. Dual Citizenship
2
Citizens Information. Entitlement to Irish Citizenship
3
Immigration Service Delivery. How to Become an Irish Citizen Guide
4
Department of Foreign Affairs. Registering a Foreign Birth
5
Citizens Information. The Foreign Births Register
6
Irish Statute Book. Irish Nationality and Citizenship Act 1956 – Section 16
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Immigration Service Delivery. Applications Based on Irish Descent or Irish Associations
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Citizens Information. Becoming an Irish Citizen Through Naturalisation
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Immigration Service Delivery. Contact Citizenship
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Immigration Service Delivery. Proofs of Identity and Residence
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Immigration Service Delivery. Citizenship Ceremonies