Roker,
As the previous poster said, marginal relief may apply when total income exceeds the 36,000 limit. If your Irish deposit interest is significant it is worth filing an annual return to Revenue in order to get a DIRT rebate.
On a related point, can anyone advise on the proper section of the 2011 Form 11 to enter An Post interest that is paid gross? I contacted Revenue but the three people I spoke to appear to be guessing!
Under the Irish deposit interest heading there is a section for
Gross interest received where DIRT was not deducted by virtue of S. 256(1A) or 256(1B)
I understand this may relate to interest (e.g. any bank accounts) for which a person may have been granted the DIRT exemption.