Ireland does not currently have a nationwide tenancy deposit protection scheme like those operating in some parts of the UK. In most cases, the landlord or letting agent holds the deposit and should return it promptly when the tenancy ends, subject to lawful deductions for matters such as rent arrears or damage beyond normal wear and tear. Ask for an itemised explanation and supporting evidence if money is withheld. If you cannot agree, the Residential Tenancies Board (RTB) can consider the dispute, based on the facts and evidence; a solicitor can advise on a complex case.