if you spend 280 days or more in Ireland for any purpose over a period of two consecutive tax years you will be regarded as resident in Ireland for the second tax year. For example, if you spend 140 days here in year 1 and 150 days here in year 2 you will be resident in Ireland for year 2.
(However, you can spend up to 30 days in total in Ireland in either tax year and this test will not apply to make you resident even though the combined total of days spent in Ireland over the two tax years may be 280 or more. For example, if you spend 365 days in Ireland in year 1 and only 14 days here in year 2, thereby giving a combined total presence of 379 days, you will not be regarded as resident for year 2 under this test.)