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    TaxKilnUK tax guidance
    TaxKilnUK tax guidance

    Moving Abroad → Ireland

    🇮🇪Moving from UK to Ireland — Tax Framework (+ Common Travel Area)

    The UK to Ireland corridor has a unique legal layer: the Common Travel Area predates EU membership and survived Brexit independently. British and Irish citizens move freely between the two jurisdictions without immigration restriction — but tax residence is determined separately by each country's domestic rules and the UK-Ireland DTA 1976 tie-breakers. The CTA grants immigration rights, not tax-residence harmony.

    Below is the framework: UK SRT plus Irish Revenue residence (183-day OR 280-day combined) plus ordinary residence plus Irish domicile concepts; CTA legal basis (Memorandum 2019 plus Ireland Act 1949 s.2(2)(c) plus Protocol 20); UK-Ireland DTA 1976 article-by-article with corrected numbering (Art. 7 immovable property, Art. 14 capital gains, Art. 15 employment, Art. 17 private pensions, Art. 18 government service); the UK government service pension trap (Art. 18 source-state retention catches UK civil servants, NHS staff, teachers, forces, and police moving to Ireland); cross-border worker mechanics (NI to ROI frontier workers under Section 825A TCA 1997); the Irish remittance basis (still available to Irish-resident non-domiciled individuals — narrower than the abolished UK regime); and Irish CAT plus UK IHT interaction. Most movers self-serve through this framework; specialist advice is warranted only for complex cross-border employment and estate planning.

    High-volume corridor — historical and ongoing UK to Ireland flow plus reverse Irish to UK flow. Common Travel Area means no visa friction.

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    Guidance, not advice. We explain the rules, we don't assess your situation. Always seek financial or tax advice from your accountant, or contact HMRC. Read our editorial scope →

    Country overview

    Residence test

    Irish Revenue residence (TCA 1997 s.819): (a) 183 days in Ireland in the calendar year; OR (b) 280 days across the current and immediately preceding tax year combined (with a 30-day floor in each year). Ordinary residence (s.820 TCA 1997) is a separate concept = resident in three consecutive prior tax years; ordinary residence persists for three years after Irish residence ends. Domicile is a distinct Irish concept that remains operative in Irish tax (despite the UK April 2025 abolition of domicile for UK tax purposes). Practical first-time registration: PPSN (Personal Public Service Number) via the Department of Social Protection, then Revenue Online Service (ROS) registration.

    Key tax structures

    Treaty key features

    The framework

    Residence determination — UK SRT plus Irish 183/280-day →

    UK SRT plus Irish Revenue 183-day OR 280-day combined test, plus ordinary residence (three prior tax years), plus Irish domicile concept. PPSN registration via DSP, ROS registration via Revenue.

    Common Travel Area — legal basis plus tax distinction →

    Memorandum 2019, Ireland Act 1949 s.2(2)(c), Protocol 20, UK-Ireland Convention on Social Security 2019, and TCA 2020. Grants immigration rights; tax residence is still determined separately by each domestic system.

    UK-Ireland DTA 1976 mechanics (article-by-article) →

    Article 7 immovable property, Article 14 capital gains, Article 15 employment, Article 17 private pensions, Article 18 government service. OECD-model Art. 19 reconciliation with the 1976 DTA Art. 18.

    UK government service pension trap (Art. 18) →

    Article 18 reserves taxing rights on UK government service pensions to the source state. Catches UK civil servants, NHS, teachers (state), armed forces, police, and local authority pensioners moving to Ireland. Common trap; widely mis-sold.

    Cross-border worker mechanics (NI ↔ ROI) →

    Section 825A TCA 1997 Transborder Workers' Relief, frontier worker mechanics, post-Brexit social security coordination under the UK-EU TCA plus the UK-Ireland Convention on Social Security 2019.

    Irish remittance basis (Irish-resident non-domiciled) →

    Available to Irish-resident non-Irish-domiciled individuals. Narrower than the abolished UK regime (April 2025 reform). Most UK nationals are UK-domiciled under common law and not eligible for the Irish version.

    Irish CAT plus UK IHT interaction →

    Irish CAT 33 percent on gifts and inheritances; Group A €400k / B €40k / C €20k (post-2 October 2024). Cross-border estate mechanics with UK IHT, plus CAT Dwelling House Exemption (s.86 CATCA 2003).

    UK State Pension plus social security coordination →

    Cross-referenced — full mechanics on the cross-border worker page. UK State Pension is uprated in Ireland via the UK-EU TCA Protocol on Social Security Coordination plus the UK-Ireland Convention on Social Security 2019 (not via residual EEA mechanisms).

    Anti-snake-oil, corridor-specific patterns

    Pattern: Ireland tax-residence specialist for €3,000+

    Reality: The Irish Revenue residence test is mechanical: 183 days OR 280-day combined (s.819 TCA 1997). Self-serve via Revenue Online Service plus Citizens Information Ireland. Qualified Irish cross-border practitioners exist at standard hourly or fixed fees for genuinely complex cases — not a 'residence specialist' markup.

    Pattern: Cross-border worker optimisation for £5,000+

    Reality: Section 825A TCA 1997 Transborder Workers' Relief is statutory and mechanically applied. Eligibility criteria are published. Specialist advice is warranted only for genuinely complex multi-employer or post-COVID hybrid remote-work PE-risk cases — not a generic 'optimisation specialist' markup.

    Pattern: Irish remittance basis specialist for €4,000+

    Reality: The Irish remittance basis is available to non-Irish-domiciled Irish residents. Most UK nationals are UK-domiciled under common law and are therefore not eligible for the Irish version. Specialist advice is warranted only for genuinely non-domiciled cases — not generic 'remittance basis specialist' markup.

    Pattern: PPSN expediting service £500

    Reality: The PPSN is a free issue from the Department of Social Protection. Reasonable processing times apply via Citizens Information Ireland. No legitimate expediting service exists.

    Pattern: Avoid UK government pension tax by becoming Irish resident

    Reality: Wrong. Article 18 of the UK-Ireland DTA 1976 reserves taxing rights on UK government service pensions to the source state (the UK). UK civil servants, NHS staff, teachers (state), armed forces, and police moving to Ireland: the UK retains taxing rights on the UK pension regardless of Irish residence. Widely mis-sold by relocation services; the carve-out is in the treaty text.

    Free plus regulated-body resources

    Destination-country resources

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