Welcome to the Companies Registration Office Ireland

The Companies Registration Office (the CRO) is the central repository of public statutory information on Irish companies, business names, and limited partnerships

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NOTICE: Extended CORE and RBO downtime

28 October 2026
Due to essential server maintainance work, CORE and the RBO will be unavailable between 14:00 Friday (30/10/2026) and 21:00 Sunday (01/11/2026). Published 28/10/2026
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Daily Processing Times 28/10/2026

28 October 2026
As of 28 September, we are processing submissions received on the following dates: -Ordinary A1 Online Scheme: 13 October 2026 -Fé Phrainn A1 Online: 19 October 2026 -RCN Company Name Reservations: 28 October 2026 -RBN1 Business Names: 08 October 2026 -B2 Company Address: 21 October 2026 Forms C1s, C1As, C1Bs, add F8s for the 23
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Peak Filing 2026 is approaching

27 October 2026
Peak Filing is the busiest time of the year for filing Annual Returns. Peak Filing day is 25 November, the deadline for companies with an Annual Return date of 30 September, and during the month of November, approximately 52,000 Annual Returns are due to be filed. Due to increased demand, Peak Filing may mean: -Longer
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