Tax in Ireland

Who is the tax authority in Ireland?

The Office of the Revenue Commissioners (Revenue) is the principal Irish tax authority, established under the Ministers and Secretaries Act 1924 and operating under the Department of Finance. Revenue administers Income Tax, Universal Social Charge, Pay Related Social Insurance (in conjunction with the Department of Social Protection), Corporation Tax, Value Added Tax, Capital Gains Tax, Capital Acquisitions Tax (gift and inheritance), Stamp Duty, Local Property Tax, Customs, and Excise. The Tax Appeals Commission is the independent first-instance appellate body for tax disputes. Revenue's primary public-facing guidance is the Tax and Duty Manual, supplemented by Statements of Practice, eBriefs, and the operational Revenue Online Service (ROS) [SC1][SC2]. Chartered Accountants regulated by Chartered Accountants Ireland and the Irish Tax Institute's Chartered Tax-Adviser (CTA) credential are the principal credentialed tax practitioners.

What is the Irish tax year and the filing deadline?

The Irish personal tax year is the calendar year (1 January – 31 December). Self-assessed individuals (chargeable persons under Section 950 TCA 1997) file Form 11 by 31 October following year-end; filers using the Revenue Online Service (ROS) for both filing and payment receive an annual extension into mid-November (the exact ROS date is announced by Revenue each year, typically falling in the second or third week of November) [SC3]. Pay-and-File is the operating cycle: by the 31 October / mid-November deadline, the filer pays the balance of tax owed for the prior year plus a Preliminary Tax instalment for the current year. Preliminary Tax must equal the lower of 90 percent of current-year liability, 100 percent of prior-year liability, or 105 percent of liability two years prior (the 105 percent rule is only available for filers who pay by direct debit). PAYE-only filers whose income is fully covered by withholding are not chargeable persons and do not file Form 11; they may file Form 12 to claim refunds or credits. Companies file Form CT1 within 8 months and 21 days of fiscal year-end (or 23 days for ROS filers) and pay Preliminary Corporation Tax 31 days before fiscal year-end.

How is Irish tax residency determined?

Irish tax residency for an individual is determined by physical presence under Section 819 TCA 1997: a person is resident for the year if they are present in Ireland for 183 days or more during the tax year, or present for 280 days or more across the current and immediately preceding year combined (with a minimum 30 days in each year for the look-back rule to engage). A 'day' for the residency test is any day on which the individual is in Ireland at any time, post-2009 reform [SC5]. Domicile is a separate concept from residence, retained from the common-law doctrine: an individual's domicile is acquired at birth (typically following the father's domicile) and changes only by the formal acquisition of a domicile of choice. Domicile drives Ireland's distinctive non-domiciled remittance basis: non-domiciled Irish residents are taxed on Irish-source income and on foreign-source income only to the extent it is remitted to Ireland. Ordinary residence is a third concept (resident in three consecutive years), affecting the deemed-disposal rule on emigration and the offshore-fund anti-avoidance regime.

How does Irish personal income tax work?

Personal income tax for 2025 has two rate bands: a Standard Rate of 20 percent on income up to a Standard Rate Cut-Off Point and a Higher Rate of 40 percent above. The Standard Rate Cut-Off Point is EUR 44,000 for a single filer in 2025; EUR 53,000 for a single parent; EUR 53,000 for a one-earner married couple; and EUR 88,000 for a two-earner married couple (with rules limiting the transferability of unused band between spouses) [SC4]. The Personal Tax Credit (a non-refundable credit, not a deduction) is EUR 2,000 for a single filer in 2025, with additional credits for PAYE earners (EUR 2,000), self-employed earners (EUR 2,000), age (EUR 245), home carer (EUR 1,950), and dependants. Universal Social Charge (USC) applies on top at 0.5 percent up to EUR 12,012, 2 percent up to EUR 27,382, 3 percent up to EUR 70,044, and 8 percent above. PRSI for Class A employees runs at 4.1 percent (rising to 4.2 percent from 1 October 2025 under the multi-year increase trajectory); for self-employed Class S the rate is also 4.1 percent (4.2 percent from October 2025).

Capital Gains Tax is a flat 33 percent on chargeable gains, with a EUR 1,270 annual exemption per individual (not transferable). Entrepreneur Relief reduces the rate to 10 percent on lifetime qualifying gains up to EUR 1 million for active entrepreneurs disposing of trading business interests. Stamp Duty on residential property purchases is 1 percent up to EUR 1 million plus 2 percent on the excess; non-residential property is 7.5 percent.

How does Irish corporate tax work?

Ireland operates a two-rate corporate regime. The 12.5 percent rate applies to trading income (income from an active business) under section 21 TCA 1997 — historically the centrepiece of Irish corporate-tax positioning. The 25 percent rate applies to non-trading income (passive investment income, rental income, certain land-development gains) [SC4]. From 31 December 2023, the OECD Pillar Two Global Anti-Base Erosion (GloBE) rules were implemented in Irish law via Part 4A TCA 1997, applying a 15 percent effective minimum tax to in-scope multinational groups with consolidated revenue above EUR 750 million; the Irish Qualified Domestic Minimum Top-up Tax (QDMTT) applies to in-scope Irish entities, and the Income Inclusion Rule applies to Irish parent entities. The Knowledge Development Box reduces the effective rate on qualifying intellectual-property income to 6.25 percent. The R&D Tax Credit is 30 percent of qualifying expenditure under the post-Finance Act 2023 enhanced rate, available as a refundable credit over three instalments [SC5].

How does indirect tax work in Ireland?

Value Added Tax in Ireland operates within the EU VAT Directive framework. Standard rate is 23 percent, applying to most goods and services. The first reduced rate is 13.5 percent (most fuel, electricity supplied by a fuel supplier, building services, restaurant and catering services, hotel accommodation, hairdressing). The second reduced rate is 9 percent (tourism-sector accommodation, certain print publications, sporting facilities — subject to year-by-year Budget changes). The zero rate applies to most basic foodstuffs, children's clothing and footwear, oral medicines, books and e-books, and exports [SC4]. The exempt-without-credit category covers most financial, insurance, education, and medical services. Mandatory VAT registration thresholds are EUR 85,000 for goods and EUR 42,500 for services in any 12-month period (raised from EUR 80,000 / EUR 40,000 from 1 January 2025). The EU One-Stop Shop (OSS) and Import One-Stop Shop (IOSS) regimes apply to cross-border B2C supplies. Excise duty applies on alcohol, tobacco, and energy products; Carbon Tax is included in fuel-excise rates and rises annually.

How is crypto taxed in Ireland?

Revenue's published guidance treats cryptocurrency as a chargeable asset for Capital Gains Tax purposes, not as currency [SC2]. For most individuals, gains on the disposal of cryptoassets — sale for fiat, exchange for another cryptoasset, payment for goods or services — are subject to CGT at the flat 33 percent rate, with the EUR 1,270 annual exemption available. The standard share-pooling rules under section 580 TCA 1997 apply to identification of disposals against acquisitions, with the same-day and 4-week-bed-and-breakfast rules. Receipt of cryptoassets as employment compensation, mining rewards, staking rewards, or airdrops is taxable as ordinary income at fair market value on receipt under the trading or miscellaneous-income provisions, with that value becoming the acquisition cost for any later CGT disposal. Where activity in cryptoassets amounts to a trade (frequent dealing, organisation, intention to profit at the level of a trade), gains and losses are taxable as trading income at progressive personal rates; this characterisation is rare for non-professional individuals.

How does Ireland handle tax treaties?

Ireland maintains a network of approximately 75 comprehensive Double Taxation Conventions in force, plus several signed but not yet ratified [SC5]. Most Irish treaties follow the OECD Model with Irish reservations, particularly on the credit-versus-exemption method (Ireland generally applies the credit method for foreign tax). Ireland signed and ratified the OECD Multilateral Instrument; the MLI's modifications, including the Principal Purpose Test, apply to many of Ireland's covered treaties for periods from 2019 onward. Irish-resident companies have access to the EU Parent-Subsidiary Directive and the EU Interest and Royalties Directive, eliminating most withholding tax on EU intra-group flows within scope. Foreign tax-credit relief for Irish residents is generally claimed under Schedule 24 TCA 1997. The unilateral foreign-dividend exemption introduced for resident companies from 1 January 2025 represents a structural simplification of the historical worldwide-credit system [SC5].

What are the common penalties and pitfalls for foreigners?

Late filing of Form 11 triggers a 5 percent surcharge on tax due (capped at EUR 12,695) where the return is filed within two months of the deadline; the surcharge rises to 10 percent (capped at EUR 63,485) thereafter [SC1]. Interest on late-paid tax accrues at a daily rate. Specific penalties under Section 1077E TCA 1997 for under-declaration depend on the category of default — careless behaviour without significant consequences (3 percent), careless behaviour with significant consequences (15 percent), or deliberate behaviour (75 percent or 100 percent), with reductions for prompted or unprompted qualifying disclosure.

Common pitfalls for arrivals to Ireland include: failing to track the 280-day look-back rule when the current-year-only count is below 183; missing the distinction between residency, ordinary residence, and domicile (each carries different consequences); assuming the non-domiciled remittance basis applies broadly when the regime has been progressively narrowed and continues to face reform proposals; and underestimating the Preliminary Tax cycle in the first chargeable year, where 100 percent of current-year-estimate must be paid before year-end. For complex residency, domicile, or remittance scenarios, common approaches discussed by practitioners include consulting a credentialed Irish tax pro before relying on a single-test conclusion.