| Organisation | Link | Comments |
| The Revenue Commissioners |  | Everything you wanted to know about tax in Ireland. |
| Revenue Online Service (ROS) |  | ROS is the Irish Revenue's interactive internet facility providing business customers with a quick, secure and cost effective method to conduct their business electronically with Revenue. Full details of all services and facilities are available on its Services page.
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| Plato - Business Support Organisation |  | Plato offers owner managers a business support forum where they can tackle the challenges and issues of today's business world. Through a unique partnership with large "parent" companies, it creates a confidential and safe environment where SMEs can benefit from facilitated group learning, training activities, business linkages and networking events. |
| CRO - Companies Registration Office |  | The authority for the incorporation of new companies and registration of business names in the Republic of Ireland. Also responsible for the receipt and registration of post incorporation documents, enforcement of the filing requirements of companies, and provision of information to the public. |
Institute of Certified Public Accountants of Ireland |  | The website of the CPA Institute, a recognised auditing body which represents over 2,500 members and 1,600 students. |
| Irish Maritime Development Office |  | The IMDO has a statutory mandate to promote growth in the Irish Shipping and related services and to attract to Ireland additional marine related service sector operations along with key players in International Shipping and ancillary services. |
| ISME - Irish Small & Medium Enterprise Association |  | ISME's mission is to guarantee that Small and Medium Enterprises in Ireland have an independent voice. The Association is unconstrained in this mission because it uniquely relies on the resources of its members and not those of big business.
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| County Enterprise Boards |  | The CEBs were set up to meet a need, which was identified for support targeted specifically at the micro-enterprise sector. A key feature of the new CEB network was that it would include representatives of a range of local interests and have a wholly localised county-based focus to its mission. |