What is split year treatment for tax residency in Ireland?

Split year treatment is a concession in Irish tax law that applies when an individual arrives in or departs from Ireland during a tax year. It prevents full worldwide taxation being applied to individuals who are only Irish tax resident for part of a year.

Arriving in Ireland:

If you move to Ireland during a tax year and will be resident for the following full year, split year treatment applies from the date of arrival. Before that date, you are treated as non-resident, so only Irish-source income (e.g., employment income from an Irish employer) is taxable in Ireland for the pre-arrival period. Foreign income earned before arriving in Ireland is generally not taxable here.

Leaving Ireland:

If you leave Ireland during a tax year and will not be resident the following year, split year treatment applies up to your date of departure. After departure, you are treated as non-resident for the remainder of the year. Employment income earned abroad after departure is not taxable in Ireland, even though you may technically have been resident for the entire year based on day counts.

How to claim:

Split year treatment is not automatic — it must be claimed by the taxpayer. For PAYE workers, you notify your employer and Revenue. For self-assessed taxpayers, the claim is made on the Form 11 with supporting information about arrival/departure dates.

Important conditions:

• Split year only applies to employment income (Schedule E income). It does not automatically apply to investment income, rental income, or self-employment income.
• You must establish residence in Ireland (or in a new country) in the following year for the split year claim to hold.

For complex situations involving multi-jurisdiction income or tax treaty claims, a tax adviser familiar with international tax is recommended.