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    TaxKilnUK tax guidance

    Moving Abroad → SRT plus Irish residence test

    UK SRT plus Irish Revenue Residence Test (UK to Ireland)

    Determining your tax residence on the UK-Ireland corridor requires running two independent tests. The UK applies the Statutory Residence Test (Schedule 45 Finance Act 2013) on a UK fiscal-year basis (6 April to 5 April). Ireland applies the Irish Revenue residence test under s.819 TCA 1997 on a calendar-year basis: (a) 183 days physical presence in Ireland in the calendar year; OR (b) 280 days in the current and immediately preceding tax year combined (with a 30-day floor in each year). Each test is satisfied independently. The Common Travel Area governs immigration rights between the two jurisdictions but does NOT determine tax residence — separate domestic tests apply on each side, with the UK-Ireland DTA 1976 Article 4 tie-breaker resolving dual-residence for treaty purposes.

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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 →

    In plain English

    Two countries, two residence tests, running in parallel. The UK SRT is explained in detail at /moving-abroad/srt. The Irish side has two independent triggers under s.819 TCA 1997: either you are in Ireland for 183+ days in the calendar year, OR you are in Ireland for 280+ days across the current and immediately preceding tax year combined (with a 30-day floor in each year). Meet either limb and you are Irish-resident for the whole calendar year. Ireland adds two further concepts the UK does not parallel since April 2025. Ordinary residence (s.820 TCA 1997) attaches once you have been Irish-resident for three consecutive prior tax years, and persists for three years after Irish residence ends — relevant for CGT and certain income sourcing rules during the wind-down. Irish domicile remains a live concept in Irish tax law and governs access to the Irish remittance basis for non-Irish-domiciled Irish residents. The Common Travel Area gives British and Irish citizens immigration freedom — but the CTA does not align the tax-residence systems. The asymmetry between the UK fiscal year (6 April to 5 April) and the Irish calendar year means cross-over windows of dual residence in the year of move are common. The UK-Ireland DTA 1976 Article 4 tie-breaker resolves dual residence for treaty-allocated income.

    How it works

    UK side — applying the SRT

    Run the three-tier SRT in order: Automatic Overseas Tests, then Automatic UK Tests, then Sufficient Ties. Split-year Case 1 (starting full-time work overseas) and Case 3 (ceasing to have a UK home) commonly apply in the year of departure to Ireland. Full mechanics at /moving-abroad/srt. The SRT outcome decides UK domestic residence; the DTA Article 4 tie-breaker may then override for treaty-allocated income.

    Irish side — s.819 TCA 1997 two limbs

    (1) 183-day rule: count days of physical presence in a calendar year. A day generally counts if you are in Ireland at any point during it. (2) 280-day combined rule: count days in the current calendar year plus days in the immediately preceding calendar year. If the combined total is 280 or more — and you have at least 30 days in each year — you are Irish-resident in the current year. Meet either limb and Irish residence attaches for the whole calendar year. Ireland does not operate a UK-style statutory split-year mechanism by default; an arrival-year election under s.822 TCA 1997 can apportion in tightly-defined cases.

    Ordinary residence (s.820 TCA 1997)

    Ordinary residence attaches once you have been Irish-resident for three consecutive prior tax years. Once attained, it persists for three years after Irish residence ends. Ordinary residence drives extended Irish CGT exposure for individuals who become non-resident but remain ordinarily resident — a separate parallel to the UK temporary non-residence anti-forestalling rule (TCGA 1992 s.10A).

    Irish domicile

    Domicile remains operative in Irish tax. Most UK nationals will be UK-domiciled (domicile of origin) under common law on arrival in Ireland. Acquiring an Irish domicile of choice requires both physical residence in Ireland and an intention to remain permanently or indefinitely — a high evidential bar. Domicile drives access to the Irish remittance basis (see /moving-abroad/ireland/irish-remittance-basis) and is also material for CAT purposes (see /moving-abroad/ireland/cat-and-uk-iht-interaction).

    Practical registration — PPSN, ROS, TR1

    PPSN (Personal Public Service Number) is the prerequisite for any Irish tax, social welfare, or banking interaction — issued by the Department of Social Protection. After PPSN is issued, register for the Revenue Online Service (ROS) using your PPSN. For employees, PAYE registration is normally handled by the employer; for self-employed or chargeable persons, file TR1 to register for income tax and (if applicable) VAT.

    Who this applies to + key conditions

    Statute + manual references

    Primary: UK: Schedule 45 Finance Act 2013 (SRT). Ireland: s.819 TCA 1997 (residence), s.820 TCA 1997 (ordinary residence), s.821 TCA 1997 (electing to be resident from arrival). Treaty: UK-Ireland DTA 1976 Article 4 tie-breaker.

    Related: PPSN (Personal Public Service Number) via Department of Social Protection; Revenue Online Service (ROS) registration; Form 12 / Form 11 Irish income-tax return (employee vs chargeable person); TR1 / TR2 Irish tax-registration forms

    HMRC manual: HMRC RDR3 (SRT guidance) plus INTM156000+ for UK-Ireland treaty residence

    Common mistakes + traps

    Worked example

    Aoife, a UK national taking a senior role in Dublin from 1 March 2026

    Aoife was UK-resident in 2025/26. She moves to Dublin on 1 March 2026 to start a full-time employment contract. Her partner and one school-age child move with her. She sells the family home in Bristol in February 2026 and rents an apartment in Dublin. She retains a UK buy-to-let.

    1. UK side, 2025/26: split-year Case 1 (starts full-time work overseas) typically applies. UK part: 6 April 2025 to 28 February 2026 (UK-resident). Overseas part: 1 March 2026 to 5 April 2026 (non-resident). Full UK SRT mechanics at /moving-abroad/srt.
    2. Irish side, calendar 2026: Aoife is in Ireland from 1 March 2026 — roughly 306 days by 31 December. She passes the 183-day rule under s.819(1)(a) TCA 1997, so she is Irish-resident for the FULL 2026 calendar year — including January and February 2026 before she physically arrived.
    3. Dual-residence window: 1 January to 28 February 2026 she is UK-resident (UK part of 2025/26 under SRT split-year Case 1) AND Irish-resident (under s.819 TCA 1997 for the full calendar year). DTA Article 4 tie-breaker applies: in January and February her permanent home and centre of vital interests were in Bristol. Treaty residence = UK to 28 February 2026, Ireland from 1 March 2026. See /moving-abroad/ireland/dta-1976-mechanics.
    4. Registration steps: PPSN application via the Department of Social Protection on arrival. ROS registration via Revenue using the PPSN. PAYE handled by her Dublin employer.
    5. Irish return for 2026 (Form 11 or Form 12, filed Oct/Nov 2027): full-year worldwide income, with treaty relief for UK-source income covered by the DTA. UK SA 2025/26 (filed by 31 January 2027): split-year basis with SA109. The Bristol buy-to-let continues as UK-source rental under the NRL scheme — see /moving-abroad/leaving-uk-procedures.

    Outcome: Aoife is UK-resident under SRT split-year Case 1 to 28 February 2026 and Irish-resident under s.819 TCA 1997 for the full 2026 calendar year, with treaty residence resolved by DTA Article 4. She files in both jurisdictions for 2026 with treaty mechanics governing income allocation. Ordinary residence will attach from 2029 (after three consecutive tax years of Irish residence) and persist for three years if she later leaves Ireland.

    How this connects to the rest of the framework

    Statutory Residence Test →

    Full UK SRT mechanics, Schedule 45 FA 2013.

    Common Travel Area →

    CTA grants immigration rights but does NOT determine tax residence.

    UK-Ireland DTA 1976 →

    Treaty Article 4 tie-breaker once dual-resident under both domestic tests.

    Irish remittance basis →

    Access depends on Irish residence plus non-Irish domicile.

    Frequently asked questions

    What happens if I miss the Self Assessment deadline?+
    The Self Assessment deadline is 31 January (online filing) for the previous tax year. Miss it and HMRC apply an automatic £100 penalty. Beyond that: £10 per day from 3 months late (capped at £900), 5% of tax due at 6 months late, and another 5% at 12 months late, under Schedule 55 of the Taxes Management Act 1970. If you have a genuine reason (serious illness, bereavement, technical issue with HMRC's systems) you can appeal with evidence; HMRC accepts reasonable excuse appeals in most genuine cases.
    Do I need an accountant or can I file Self Assessment myself?+
    Legally you can file Self Assessment yourself via gov.uk for free, most simple sole-trader returns (single income source, basic expenses) are realistic to self-file. An accountant adds real value when: your trading profit is above £40,000 (extraction-strategy decisions matter), you have multiple income streams (PAYE + self-employment + property + dividends), you've crossed the £90,000 VAT threshold, you're considering incorporation, or you have an HMRC enquiry. Expect to pay £400-£1,500/year for a typical sole-trader accountant; the cost is itself a deductible expense.
    How do payments on account work?+
    When your Self Assessment tax bill exceeds £1,000 for the first time, HMRC requires payments on account toward NEXT year's tax. Half the current bill is due 31 January (alongside the current bill); the other half is due 31 July. So your first January after crossing the threshold can hit with a double-bill: last year's balance + first payment on account. Adjust via Form SA303 if you expect next year's income to drop substantially. Payments on account don't apply if more than 80% of your tax is collected via PAYE.
    Does Ireland really tax me from 1 January if I only arrived in March?+
    Yes, once either s.819 TCA 1997 limb is met for a calendar year, Irish residence attaches to the full year. The DTA Article 4 tie-breaker then governs which country has treaty taxing rights for income arising in the pre-arrival window. Irish domestic position: worldwide income reportable on the Irish return for the full calendar year of residence.
    What is the difference between residence, ordinary residence, and domicile in Ireland?+
    Residence is a year-by-year mechanical test (s.819 TCA 1997). Ordinary residence is a status that attaches after three consecutive years of residence and persists for three years after residence ends (s.820 TCA 1997). Domicile is a separate common-law concept — your permanent home jurisdiction — and is still operative in Irish tax law despite the UK abolishing it for UK tax purposes in April 2025. Most UK nationals arriving in Ireland will be UK-domiciled and only Irish-resident, which is the configuration that opens access to the Irish remittance basis.
    Does the Common Travel Area mean I am automatically Irish-resident on the same basis as a UK resident?+
    No. The CTA grants immigration rights — free movement, right to reside, right to work, access to public services, reciprocal social welfare and healthcare — but it does NOT align the tax-residence systems. The UK and Ireland each apply their own domestic residence test. See /moving-abroad/ireland/common-travel-area for the legal basis.
    Can I elect to be Irish-resident from my date of arrival rather than the full year?+
    Section 822 TCA 1997 provides an election in tightly-defined cases where an individual is treated as resident for the whole tax year of arrival because they expect to be resident in the following year. The election is the inverse of UK split-year: it pulls residence FORWARD to cover the arrival year. The genuine apportionment of the arrival year into pre- and post-arrival components is not available in Ireland in the same way it is under UK SRT split-year cases. Most arrivers from the UK will simply be Irish-resident for the whole calendar year once a limb of s.819 is met.

    Free + regulated-body resources

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