The Next Passport
Irish Citizenship by Descent
Research hub for Irish citizenship by descent. Ireland's Foreign Birth Registration (FBR) process allows people with Irish-born parents, grandparents, or further ancestors to claim citizenship — with approximately 33 million Americans claiming Irish ancestry.
The Next Passport is not affiliated with the Government of Ireland, the Department of Foreign Affairs, or any immigration solicitor. Content is informational only and is not legal advice.
Not sure if you qualify?
Our free eligibility check takes 2 minutes and tells you if you may be eligible for Irish citizenship by descent.
Check your eligibility →How Irish Citizenship by Descent Works
Irish citizenship by descent depends on how far back your Irish-born ancestor is and whether intermediate generations registered on the Foreign Births Register before the next generation was born.
Parent Born in Ireland
If your parent was born anywhere on the island of Ireland, you are entitled to Irish citizenship. Register on the Foreign Births Register (FBR) through the Department of Foreign Affairs. Processing time: approximately 9–12 months.
Grandparent Born in Ireland
If your grandparent was born in Ireland, you are also entitled to citizenship via FBR. Your parent does NOT need to have registered first — this is the most commonly misunderstood rule. Citizenship is effective from the date of FBR registration, not retroactively from birth.
Great-Grandparent or Further
For claims beyond grandparent, every generation in the chain must have been registered on the FBR before the next generation was born. There is no statutory generational limit, but in practice most chains are broken. Section 16 discretionary naturalization is the fallback for broken chains.
What You'll Need
Irish citizenship by descent applications are handled through the Department of Foreign Affairs' Foreign Birth Registration system. Here is an overview of the process:
Application
Submit your FBR application online at fbr.dfa.ie. After electronic submission, print the completed form, sign it in front of a qualified witness, and mail with all original documents to Dublin.
Fee
€278 for adults (18+), €153 for minors (under 18). Paid online during electronic submission. Non-refundable.
Processing Time
Approximately 9–12 months as of early 2026. Times vary — check the DFA website for current estimates.
Witness
A qualified professional (US Notary Public accepted) who personally knows you must countersign your form, certify your ID copy, and sign 2 of your 4 photos. Cannot be a relative.
Key Dates & Laws
Important legislation and constitutional changes that affect Irish citizenship by descent eligibility.
1935 Act — Foreign Naturalization
Under Section 21 of the 1935 Act, Irish citizens aged 21+ who acquired foreign citizenship automatically lost Irish citizenship. Repealed by the 1956 Act (July 17, 1956), but NOT retroactive — ancestors who naturalized abroad before that date may have lost citizenship.
27th Amendment (January 1, 2005)
Changed Irish birthright citizenship — being born on the island of Ireland no longer automatically confers citizenship unless at least one parent is an Irish/British citizen or legal resident.
Good Friday Agreement (1998)
Guarantees people born in Northern Ireland the right to Irish citizenship if at least one parent is an Irish or British citizen, regardless of the 2005 changes.
Application Guides
Detailed guides for specific Irish citizenship by descent scenarios. Each guide covers eligibility requirements, required documents, and step-by-step instructions.
Tools & Calculators
Other Countries We Support
The Next Passport also helps with citizenship by descent for other countries.
Italian Citizenship by Descent
Canadian Citizenship by DescentThe Next Passport is not affiliated with the Government of Ireland, the Department of Foreign Affairs, or any immigration solicitor. Content is informational only and is not legal advice. Verify all details with the official DFA website before submitting documents.