From the NTMA website:
About the Scheme
The Credit Institutions (Eligible Liabilities Guarantee) Scheme 2009 (the "ELG Scheme") is made pursuant to Section 6(4) of the Credit Institutions (Financial Support) Act 2008 and came into effect on 9 December 2009 and was amended on 29 September 2010. The ELG Scheme provides for an unconditional and irrevocable State guarantee for certain eligible liabilities (including deposits) of up to five (5) years in maturity incurred by participating institutions from the date they joined the scheme until 30 June 2012 on certain terms and conditions.
The Minister for Finance has appointed the NTMA as the ELG Scheme Operator.
The ELG Scheme was introduced by the Minister for Finance as a measure to maintain the stability of the financial system in the State. The ELG Scheme will be reviewed at least on a six monthly basis to determine whether the financial support provided by the ELG Scheme continues to be necessary.
Participating institutions in the ELG Scheme are credit institutions or subsidiaries of credit institutions which have been approved by the Minister for Finance. Each participating institution is bound by terms of the ELG Scheme, including the Rules of the ELG Scheme, copies of which may be downloaded on this website. The Minister stands as guarantor of all guaranteed liabilities of a participating institution, subject to the terms and conditions of the ELG Scheme, the Rules and ELG Scheme Agreements entered into by each participating institution. A list of participating institutions is available at [broken link removed].
In respect of debt securities incurred by a participating institution after it joins the ELG Scheme, the ELG Scheme provides a guarantee for eligible liabilities for which a guarantee certificate has been issued by the NTMA. Eligible liabilities include:
- senior unsecured certificates of deposits;
- senior unsecured commercial paper; and
- other senior unsecured bonds and notes.
It is also possible for participating institutions to obtain a guarantee certificate for an entire debt issuance programme. All eligible securities issued under a guaranteed programme will be guaranteed.
So, it would seem as Liam states, if the deposit is covered by the ELG scheme (note EBS is on the list but KBC isn't) then you are protected by the full faith and credit of the Irish State.
On a related matter......
Ratings agency Standard and Poor’s has held its credit rating for Ireland at BBB+, with a negative outlook.
http://www.rte.ie/news/2012/0427/standard-poors-retains-bbb-irish-credit-rating.html