Irish citizens can work in the UK without a visa, work permit, or any form of immigration sponsorship. The Common Travel Area between the UK and Ireland gives you the same freedom to take a job, freelance, or start a business as a British citizen, and it operates entirely independently of EU membership. In practice, the only steps you need to take are showing an Irish passport to your employer and applying for a National Insurance number.
Where the Right Comes From
The Immigration Act 1971 sets the statutory basis: arrivals from Ireland are not subject to immigration control, and Irish citizens do not need leave to enter or remain in the UK.1Legislation.gov.uk. Immigration Act 1971 In 2019, ahead of Brexit, the UK and Irish governments signed a Memorandum of Understanding reaffirming these rights and confirming they sit outside the EU framework. The MoU states directly that the Common Travel Area gives Irish citizens in the UK the right to work, including on a self-employed basis, without any requirement to obtain permission.2GOV.UK. Memorandum of Understanding Between the Government of the United Kingdom and the Government of Ireland Concerning the Common Travel Area
You do not need settled status, pre-settled status, or any form of leave to remain. The right has no expiry date and does not need to be renewed.
Proving Your Right to Work to an Employer
Every UK employer has to verify a new hire’s right to work before their start date. For Irish citizens, the check is a physical document check: show your Irish passport or Irish passport card. Both current and expired versions are accepted.3GOV.UK. Prove Your Right to Work to an Employer
Irish citizens cannot use the online share code system that other foreign nationals rely on. The employer looks at the original passport or card in person, confirms the photo matches, and keeps a clear copy on file with the date of the check.4GOV.UK. Checking a Job Applicant’s Right to Work Because your right to work has no expiry date, no follow-up check is needed later.
If you do not have a passport or passport card, an Irish birth or adoption certificate can substitute, but you will also need to show an official document displaying your name and National Insurance number, such as a letter from HMRC or the Department for Work and Pensions.3GOV.UK. Prove Your Right to Work to an Employer For most people arriving from Ireland, the passport route is simpler.
Applying for a National Insurance Number
A National Insurance number is how HMRC records your tax payments and social security contributions. You apply online through GOV.UK. The application asks for your full name, date of birth, current UK address, passport details, and the date you arrived.5GOV.UK. Apply for a National Insurance Number – How to Apply
The process includes a digital identity check: you upload a photograph of your passport and take a selfie so the system can match your face to the document. If the digital check fails, you may be asked to attend an in-person appointment instead.6GOV.UK. Apply for a National Insurance Number Once approved, the number arrives by post within about four weeks of your identity being confirmed.7GOV.UK. Apply for a National Insurance Number
One thing trips people up. You do not need a National Insurance number before you start a job. As soon as your employer has checked your passport, you can begin work. Tell your employer you have applied and pass on the number when it arrives. Your employer will use a temporary tax code in the meantime.8House of Commons Library. Getting a National Insurance Number (NINO) in Great Britain Waiting for the number before accepting an offer is a common and unnecessary delay.
Freelancing, Contracting, and Cross-Border Work
The 2019 MoU explicitly protects self-employment on the same footing as employment.2GOV.UK. Memorandum of Understanding Between the Government of the United Kingdom and the Government of Ireland Concerning the Common Travel Area You can freelance, set up as a sole trader, or form a UK limited company with no business visa or sponsor.
If you live in Ireland and travel regularly to the UK for contract work, you do not need a Frontier Worker permit. You can apply for one voluntarily if you want a formal record of your status, but it is not required.9GOV.UK. Frontier Worker Permit
Healthcare, Benefits, and Tax
Working in the UK as an Irish citizen brings the same access to public services as a British citizen. You pay into one country’s social security system at a time, and while living in the UK you have the same benefit entitlements as someone born there.10nidirect. The Common Travel Area and Social Security Benefits You are exempt from the Immigration Health Surcharge and entitled to free NHS hospital treatment in England on broadly the same basis as a permanent resident, though standard charges for prescriptions and dental care still apply.11NHS. Moving to England From EU Countries or Norway, Iceland, Liechtenstein or Switzerland
If you move to the UK and work there full-time, you will generally become a UK tax resident. Spending 183 or more days in the UK during the tax year makes you automatically UK-resident under the statutory residence test. Below that, other factors like whether you keep a UK home come into play. The UK-Ireland double taxation convention, in force since 1976, prevents the same employment income being taxed twice: where the work is exercised in the UK, the UK taxes it, and Ireland gives a credit for the UK tax paid.12GOV.UK. Synthesised Text of the Multilateral Instrument and the 1976 Ireland-UK Double Taxation Convention
Regulated Professions
The automatic right to work does not mean an automatic right to practice a regulated profession. Healthcare workers, teachers, lawyers, architects, and others still have to register with the relevant UK regulator before starting work. There is no single agreement that converts Irish qualifications into British ones. The 2019 MoU acknowledges that qualification recognition “is an essential facilitator of the right to work” and commits both governments to keeping adequate recognition routes in place.13GOV.UK. Arrangements to Facilitate the Recognition of Professional Qualifications
Recognition is handled profession by profession. Each UK regulatory body deals with its Irish counterpart, some through formal mutual recognition arrangements and others case by case. Expect to submit proof of your qualification, a certificate of good standing from the Irish regulator, and an administrative fee. If you work in a regulated field, contact the relevant UK body before you move so you understand the paperwork and timelines.
Bringing a Non-Irish Partner or Family Member
Common Travel Area rights belong to Irish and British citizens personally. A spouse, partner, or other family member who is not Irish or British does not automatically get the right to live or work in the UK because you do. This is where people are most often caught out.
The usual route for a non-Irish partner is the UK family visa, applied for as the partner or spouse of an Irish citizen living in the UK. You will both need to meet the eligibility requirements, which include a minimum income threshold and evidence of a genuine relationship.14GOV.UK. Family Visas – Apply as a Partner or Spouse A narrower option, the EU Settlement Scheme family permit, remains available to some family members whose relationship with an EU citizen predates 31 December 2020.15GOV.UK. Apply for an EU Settlement Scheme Family Permit to Join Family in the UK Start the visa application well before your move, because processing times and financial requirements can hold things up.