Irish Citizenship by Descent for UK Citizens
If you are a UK citizen adopted in Ireland or have Irish parents or grandparents, you may be eligible for Irish citizenship by descent.
For more information about Irish citizenship for British nationals, including the eligibility criteria, how to apply, and to receive bespoke immigration advice, contact any of our immigration lawyers. You can reach us on +44 (0) 333 305 9375 or contact us online today.
Page Contents
- Overview of the Irish Citizenship by Descent
- Routes to Irish Citizenship by Descent
- How to Get an Irish Citizenship by Descent
- Fees and Processing Times
- Citizenship Ceremony
- Required Documents for Irish Citizenship by Descent
- Advantages of Irish Citizenship and Remaining an EU Citizen
- Speak with an Immigration Lawyer at Total Law
- Frequently Asked Questions
How to Get Irish Citizenship by Descent for UK Citizens
Irish citizenship by descent is a route for British citizens to become Irish citizens and get the full benefits of both. This has become popular for UK citizens who still want to be part of the European Union even after Brexit. You can claim Irish citizenship if you descend from Irish ancestry by registering your birth via the Foreign Births Register.
To be considered an Irish citizen by descent, you must be born or adopted in Ireland or by parents or grandparents who were either born in Ireland or Ireland nationals. However, note that just being born in Ireland does not solely qualify you to get Irish citizenship; you must also meet other eligibility requirements.

Eligibility Requirements for Irish Citizenship by Descent
For you to claim Irish citizenship by descent as a British citizen, you have to be in at least one of the categories below:
You were Born in Ireland Before January 1st, 2005
If you are a UK national born in Ireland before January 1st, 2005, you can claim to be an Irish citizen. You can go ahead and apply for an Irish passport. All you need to do is to show an Irish government-issued birth certificate which indicates that you were born in Ireland.
You were Born in Ireland on or After January 1st, 2005
If you were born in Ireland on or after January 1st, 2005, you must meet further eligibility requirements before you can claim Irish citizenship. Below are the extra eligibility requirements.
You Have Irish or UK Parent(s)
If one or both parents were Irish or UK citizens when you were born, you can claim Irish citizenship. This stands even if the parent who was an Irish or UK citizen died before you were born.
Your Parents Are Not Irish or British Citizens
If your parents are not Irish or British citizens, what determines whether you can lay claim to an Irish citizen is your parents’ place and status of residence. Your parent(s) must have lived in Ireland or Northern Ireland for 3 out of the 4 years before they gave birth to you.
Do note that years in Ireland as a student or waiting for a refugee application approval is not part of the required 3 years. Alternatively, you can meet this requirement if your parent(s) have permanent residence status in Ireland or Northern Ireland.
You were Born to an Irish Parent Outside Ireland
If you have a parent who is an Irish citizen but was born to them abroad, you can lay claim to Irish citizenship by descent.
You were Born in Ireland But Have No Citizenship Elsewhere
If you were born in Ireland without citizenship in another country, you can claim to be an Irish citizen.
You were born Abroad
You are still eligible for Irish citizenship by birth or descent if you have a late Irish parent.
You Have Irish Parents Who were born Outside of Ireland
If you were born outside Ireland to Irish parents who were also born outside of Ireland, you can lay claim to Irish Citizenship. To do this, you must register your birth with the Foreign Births register. This does not apply if your parents were abroad because of public service to the state. Your Irish citizenship starts after you register, not when you were born.
Irish Passport Via Ancestry or Irish Grandparents
If you and your parents were not born in Ireland, but one of your grandparents was, you are entitled to become an Irish citizen. However, you must first register with the Foreign Births register.
Irish Citizenship by Descent Through Other Irish Ancestors or Association
You cannot claim Irish citizenship if none of your parents or grandparents was an Irish citizen when you were given birth to. Generally, you cannot also claim Irish citizenship because your non-immediate relation, like a cousin, uncle or aunt, is an Irish citizen. However, you can be granted Irish citizenship by Association based on blood ties or adoption at the minister’s discretion.
If you intend to lay claims following this route, you have to ensure that:
- You have legally stayed in Ireland for at least 3 years. This goes to prove you have a tie to Ireland.
- Your application is not based on an Irish citizen whose relation to you doesn’t go further than a great-grandparent.
- Your application is not based on the fact that you are the parent, grandparent, sibling or cousin of an Irish citizen.
- Your application can take up to 2 years to process.
Irish Citizenship By Adoption
If an Irish citizen adopted you, you have also become an Irish citizen.
If you were adopted abroad, your parents would have to enter your adoption record into the Register of Intercountry Adoptions. This gives your adoption legal status in Ireland.
How to Apply for Irish Citizenship by Descent
If you wish to claim Irish citizenship by descent, you must first register your birth on the Foreign Births Register (FBR) maintained by the Department of Foreign Affairs. Once you enter into the FBR, you become an Irish citizen and can apply for an Irish passport.
The FBR application is an online process. However, the actual process begins much before filling up the online application form. Here’s a step-by-step breakdown of how you can register yourself with the FBR:
- You must first check whether you are eligible, as well as required, to register with the FBR. Adult applicants must apply themselves, while parent(s) or legal guardian(s) can on behalf of a minor applicant
- Once you have confirmed your or the minor applicant’s (if you are applying on their behalf) eligibility for the Foreign Birth Registration process, start arranging for the required supporting documents. Required documents may vary depending on your circumstances (e.g., adult applicants vs minor applicants, applicant’s parent(s) became an Irish citizen through naturalisation vs through entry on the FBR, etc.)
- Fill up the online application form on the Department of Foreign Affairs and Trade website, and submit electronically when complete. You need an email address to apply
- Pay the required fees
- Print a paper copy of the submitted application form and sign the same
- Have your signed form, supporting documents, and two of your passport photos witnessed by an appropriate person. They must know you personally but are not a relative of yours. The witness must sign and date the documents, and stamp your form with their official stamp. They should also include their contact telephone number and email address. If they do not have an official stamp, their business card must be sent
- Send the form, supporting documents and photos to the relevant office (which will either be a specific Irish embassy/consulate or a PO Box address in the State), the full address of which will be printed on the top right-hand corner of your application form
Irish embassies in the UK, the US, Canada and Australia do not process Foreign Birth Registration applications any more, so if you are applying from any of these countries, your application will be processed in Dublin.
Also, note that if you are claiming Irish citizenship via an Irish grandparent, you will need to file your application through the Department of Justice, and the final decision in your cases will be at the discretion of the Irish Minister for Justice.
Irish Citizenship by Descent Fees and Processing Times for UK Citizens
When submitting your application for Foreign Births Registration, know that an application fee applies. For adults, it is €278 and €153 for children. It will also take 9 months to approve your application to the Foreign Births Register. This is because the applications are treated on a first-come, first-served basis.
If you are stateless or expecting a child who will be stateless, you can contact us today for priority support. Call us at +44 (0) 333 305 9375. The Department of Foreign Affairs has also provided a phone number – +353 1 5683331 – to call for urgent queries of this nature. You should also do this if you are expecting a child who will not have automatic Irish citizenship at birth.
Irish Citizenship Ceremony for UK Citizens
This is the last step towards becoming an Irish citizen; you must attend a citizenship ceremony. There, you will pledge loyalty to the nation. The Irish immigration officials will send you mail concerning the venue and time. They will also tell you the requirements and how to prepare for the ceremony, including the fee.
When this is done, you have become an Irish citizen and can now apply for an Irish passport through the Department of Foreign Affairs.
Advantages of Irish Citizenship for UK Citizens After Brexit
One of the reasons why British nationals with Irish descent are obtaining Irish citizenship is that it gives them the best of both worlds. If you apply to claim Irish citizenship through descent, here are some advantages if your application is approved.
- You have free access to all 28 EU member states. You can study, work and travel to any EU country without restriction.
- You will still be an EU citizen.
- All your rights as an Irish, British and EU citizen will be transferred to your children.
- You get to preserve your EU citizenship and, as such, won’t be forced out of the EU country you are currently staying in.
- Your children will pay cheaper tuition should they choose to study in any EU member state, unlike other foreign nationals whose tuition fees are usually higher.
Required Documents for Irish Citizenship by Descent
Supporting documentation required for registering yourself on the FBR varies depending on your circumstances. The first consideration is whether you are applying for yourself as an adult or on behalf of a minor. We have provided here detailed information on required documents for both adult and minor applicants.
Documents Required for Adult Applicants
Supporting evidence for adult applicants will again vary based on whether:
- Their parent became an Irish citizen through naturalisation OR through entry on the FBR OR through Post Nuptial Citizenship Declaration
- Their parent was born abroad and became an Irish citizen post adoption
- They are applying on the basis of an Irish-born grandparent
The following documents are required in all of the above scenarios:
- A printed copy of the Foreign Birth Registration application form filled in and submitted online, (duly signed and dated by the applicant as well as signed, dated and stamped by an appropriate witness)
- Original civil birth certificate showing their parental details
- Original civil marriage certificate or any other document proving change of name if different from that in the birth certificate
- A photocopy of the applicant’s current state-issued photo ID, certified by the same witness
- Two original proofs of residential address
- Four recent, passport size, colour photos, two of which must be signed by the same witness
In addition, submit the following documents of your Irish citizen parent (as applicable):
- Original civil birth certificate showing their parental details
- Original civil marriage certificate or any other document proving change of their name if different from that in the birth certificate
- A photocopy of their current state-issued ID certified by an appropriate witness, or their original civil death certificate (if applicable)
- Their original Irish Naturalisation Certificate/Foreign Birth Registration Certificate/Post Nuptial Citizenship Certificate, or original proof of Irish citizenship at the date their adoption came into effect
If your parent became an Irish citizen via adoption, or if you are applying on the basis of an irish grandparent, you must submit the following documents of your said grandparent:
- Original civil birth certificate showing their parental details
- Original civil marriage certificate or any other document proving change of their name if different from that in the birth certificate
- A photocopy of their current state-issued photo ID, or their original civil death certificate (if applicable)
Documents Required for Minor Applicants
Supporting documents for a child applicant will also vary based on whether:
- Their parent became an Irish citizen through naturalisation OR through entry on the FBR OR through Post Nuptial Citizenship Declaration
- Their parent was born abroad and became an Irish citizen post adoption
- They are applying on the basis of an Irish-born grandparent
The common documents include:
- A printed copy of the Foreign Birth Registration application form filled in and submitted online, (duly signed and dated by the applicant as well as signed, dated and stamped by an appropriate witness)
- Original civil birth certificate showing their parental details
- Any change of name document if their current name is different from the one in their birth certificate
- A photocopy of the child’s current state-issued photo ID certified by the same witness
- Any original document that shows the child’s residential address
- Four recent, passport size, colour photos, two of which must be signed by the witness
Plus, relevant documents for their Irish citizen parent (as applicable):
- Original civil birth certificate showing their parental details
- Original civil marriage certificate or any other document proving change of their name if different from that in the birth certificate
- A photocopy of their current state-issued ID certified by an appropriate witness, or their original civil death certificate (if applicable)
- Their original Irish Naturalisation Certificate/Foreign Birth Registration Certificate/Post Nuptial Citizenship Certificate, or original proof of Irish citizenship at the date their adoption came into effect
- Two original proofs of residential address
- Four recent, passport size, colour photos, two of which must be signed by the witness
If the application is made by a legal guardian instead of the Irish citizen parent, who is not named as a parent on the child applicant’s birth certificate, proof of guardianship/parental responsibility must also be submitted, along with two original proofs of their residential address and four recent, passport size, colour photos (two of which must be signed by the witness).
If the application is made on the basis of the child’s grandparent (or if the child’s parent was adopted), the following documents relating to the said grandparent must be submitted:
- Original civil birth certificate showing their parental details
- Original civil marriage certificate or any other document proving change of their name if different from that in the birth certificate
- A photocopy of their current state-issued photo ID certified by an appropriate witness, or their original civil death certificate (if applicable)
How Immigration Lawyers help with Irish Citizenship for UK Citizens
Irish citizenship by descent is gaining increased popularity after Brexit. It is a way for British nationals to still enjoy the privileges of being a member of the EU if they meet the requirements.
If you’re a parent looking to apply for Irish citizenship by descent, Total Law can help.
We are well-grounded in Irish immigration law and can assist you in making your application seamless. Regardless of your case, we have the tools and expertise to help you.
If you’re looking for assistance with the Irish citizenship by descent requirements, unsure how to navigate the application process, or need to speak to an immigration professional regarding your immigration case, we can help.
If you want to apply for another kind of visa altogether, based on your circumstances, we can also help.
For more information about the services we provide and how we can help you, reach out to a member of our team today. Call us on + 44 (0) 333 305 9375, or contact us online.
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Related pages for your continued reading.
Frequently Asked Questions
You can get an Irish passport as a British citizen. However, you have to show that you have Irish ancestry (parents or grandparents were Irish or born in Ireland) or that you were born in Ireland.
You can get an Irish passport if you have been married to an Irish citizen for more than 3 years, above 18 years, and have lived for a while in Ireland or Northern Ireland.
You need not renounce your British citizenship to get an Irish passport. You can apply for Irish citizenship if you are eligible.
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