@ACER10 Thanks for the link. I will certainly use it when filling out the form. @Freelance As you suggested I have emailed Revenue and will wait for a reply. Thanks.
Many/most deposit accounts deduct DIRT at source.
Where that's not the case the account holder needs to pay it.
The PAYE status of the account holder is irrelevant to the tax liability.
Ae @ClubMan says, for almost all deposit interest paid by Irish Banks etc DIRT will be deducted at source so you won't have to do anything.
For overseas deposit interest, the onus is on you to declare the interest and pay the DIRT. You do this by completing either Revenue Form 12 or Form 11 after the year end, entering details of the deposit interest received (there are separate entries for EU deposit interest and for all other foreign deposit interest). After you submit this you will receive a balancing statement showing how much you owe. The rate will be either 33% or 40%, and in some instances you will also be liable for PRSI @ 4.x%.