Ireland: personal tax guide

What the tax system covers

Residence, ordinary residence and domicile determine scope. Resident and domiciled individuals are generally taxed on worldwide income; qualifying nondomiciled individuals can use remittance treatment for relevant foreign income and gains. Irish work and Irish-source income remain separate.

When you become tax resident

An individual is Irish resident when present for at least 183 days in a tax year, or at least 280 days across that year and the preceding year. A person present for 30 days or fewer in the current year is not resident under the two-year test. Presence for any part of a day generally counts. These rules make the preceding year relevant even where the person plans fewer than 183 days in the current year. Prepare the travel schedule across both years before deciding an arrival or departure date. Immigration permission is separate: lawful residence can exist without tax residence, and tax residence can arise without a particular investor or retirement permission. Dual residence requires the applicable treaty analysis. Any arrival/departure split-year treatment should be checked for the relevant income category, rather than assumed to divide all investment income and gains at the moving date.

Rates and the tax base

20% and 40% income-tax bands. The standard-rate band depends on marital and family circumstances. USC and PRSI are additional, and investment products, capital gains and domicile/remittance treatment have separate rules.

Private investment gains and business trading

Private investment disposals can be chargeable to Irish CGT. The adopted financial resolution changes the standard rate to 31% for disposals from 7 October 2026; earlier disposals generally used 33%, and development land remains subject to its distinct 33% rule. Domicile/remittance treatment, reliefs, fund rules and business trading need separate analysis.

Asset cost basis on arrival

For an asset within ordinary Irish CGT, the starting point is the original acquisition cost plus allowable adjustments. Our reading of the cited cost rules does not establish a general market-value reset merely because the owner becomes Irish resident.

Illustration only: an ordinary asset bought for €100,000, worth €300,000 on arrival and later sold for €350,000 produces a €250,000 gain before costs and reliefs under the historical-cost approach. This assumes the disposal is within Irish CGT and is not a remittance or final-tax calculation.

• This classification is an interpretation of the ordinary acquisition-cost rules, not a statement that every asset, treaty or relief has identical treatment.
• Residence, ordinary residence, domicile and remittances determine whether a foreign gain enters the Irish charge. A remittance limitation does not itself replace purchase cost with arrival value.
• Keep purchase contracts and expense records. Foreign-currency allowable expenditure uses the exchange rate when incurred, rather than simply the rate on arrival.

Ordinary residence and domicile change the result

After three consecutive Irish-resident tax years, ordinary residence begins from the start of the fourth. It generally continues for three tax years after departure. Revenue identifies exclusions for a trade or profession carried on wholly abroad, employment duties performed wholly abroad, and certain foreign income not exceeding €3,810; where that foreign-income threshold is exceeded, the whole relevant amount may be taxable.

Domicile is a separate legal concept concerned with a permanent home and intention, not a nationality label or a short-term residence choice. For a person who is not Irish domiciled, remittance-basis treatment can be relevant to qualifying foreign income and gains, but the category, source and actual remittance matter. Work performed in Ireland does not become foreign income because it is paid overseas. Maintain account and transaction records capable of distinguishing capital, income and gains before funds are brought to Ireland.

A useful model follows the income and the ownership chain

Before arrival, list personally held shares, funds, pensions, property and trusts separately from business assets. Record costs, unrealised gains, expected distributions and proposed remittances. The treatment of an investment fund should not be inferred from the treatment of an ordinary company share. For an entrepreneur, distinguish salary for Irish work, dividends, trading profits and a later disposal of the company.

The residence day count is only the first layer. Add ordinary residence, domicile, income classification, remittance tracing and any source-country taxes. Build a company decision map where the owner will retain overseas entities. Finally, model the departure year and the three-year ordinary-residence continuation, not only the first year in Ireland. This produces a realistic comparison between retaining a foreign business, changing its actual operations and relocating the owner, rather than relying on a generic headline tax rate.

Count departure and preceding-year days together

Irish residence can continue in a year with fewer than 183 days because the 280-day two-year test also applies. Review the preceding year and the rule for a current year with 30 days or fewer, rather than relying only on a new overseas residence certificate. Keep records of arrival and departure dates because part-day presence generally counts.

A treaty may resolve dual residence, but it needs a separate factual assessment and does not erase all domestic filing requirements automatically. Any split-year employment treatment is not a blanket exemption for investment income and gains after the flight date. Before agreeing a major disposal, identify the income category, residence result and any ordinary-residence continuation. Build the destination’s residence chronology alongside the Irish one so that overlapping periods and treaty positions can be explained consistently.

Ordinary residence can continue for three tax years

Someone who has become ordinarily resident generally remains so for three tax years after leaving. Revenue’s stated exceptions include a wholly foreign trade or profession, employment with all duties performed abroad, and certain foreign income not exceeding €3,810. The treatment is therefore more specific than “all worldwide income stays taxable” or “nothing is taxable after departure.”

Domicile and the remittance rules can add another layer. Before distributing accumulated foreign profits or selling an investment portfolio, establish whether the receipt is income or a gain, where it arises, and which residence/domicile rules remain applicable. Preserve old account records and evidence of capital rather than mixing funds immediately before moving. The departure advice should cover each relevant tax year and the expected transactions in it, including an earlier-than-planned return to Ireland.

Maintain evidence of the continuing Irish connections

A departure plan should identify Irish property, directorships, employment days and business activity retained after the move. A foreign-incorporated company managed from Ireland does not become nonresident simply because a new address is registered abroad; actual control must match the proposed result. An Irish-incorporated company also has its own residence and treaty analysis independently of the shareholder.

Complete the final and continuing returns, update banks with accurate tax residence and identification numbers, and preserve the records supporting remittance tracing and the end of ordinary residence. Consider the immigration consequences of absence if retaining permission or later pursuing citizenship matters. The first destination return should use facts consistent with the Irish departure file. Before returning for substantial periods, retest the day counts and company-management position rather than treating the original departure as permanent protection.

Foreign companies and income attribution

The cited corporate CFC framework must not automatically be applied to an individual shareholder. Irish corporate CFC rules attribute relevant undistributed income to a controlling or connected Irish company where relevant Irish activities occur. Personal anti-avoidance, foreign-entity classification and distribution rules need a separate owner-level review.

Departure, migration and continuing obligations

Corporate exit tax ordinarily applies at 12.5% on relevant unrealised gains, with an anti-avoidance rule and conditional five-year instalments. Personal ordinary residence can continue for three tax years; this is a separate mechanism.