Regular share accounts: no dirt deducted but you must make a tax return declaring the dividend interest and pay taxes accordingly (or none if you are exempted by being under the income threshold)
Special share accounts: dirt deducted at prevailing rate (currently 27%). No further liability to income tax but is required to be disclosed for self assessment tax returns for levies
Revenue allow for DIRt exemptions on term accounts as follows:
3 year term - exempt from DIRT on first €480 per annum
5 year term - exempt from DIRT on first €635 per annum
However, the funds must be kept for the full term or revenue will claw back the exemption given even for prior years!!!