Business Registers in Ireland: Companies Registration Office (CRO), RBN & RBO

Overview

Ireland's company information sits in a single national statutory register, the Companies Registration Office (CRO), known locally as An Oifig um Chlárú Cuideachtaí. The CRO is the Irish trade register: it records every incorporated entity, their officers, charges, and filed accounts. Two satellite registers complete the picture: the Register of Business Names (RBN) for trade-name registrations and the Central Register of Beneficial Ownership (RBO) for UBO declarations.

Together these registers cover more than 430,000 incorporated entities. Most filings (annual returns, accounts, director changes) are publicly accessible; UBO data is filed centrally but access is restricted to AML-obliged entities and other persons with legitimate interest.

Northern Ireland is part of the United Kingdom, so Northern-Irish companies are registered with the UK Companies House, not the Irish CRO. KYB workflows targeting the island of Ireland should therefore query both our UK guide and the CRO.

For KYB and AML professionals, the CRO is rich and open. The cost model is per-document rather than per-search.

Official Registers

Companies Registration Office (CRO): the Irish Trade Register

The Companies Registration Office is the national statutory registry for incorporated entities in the Republic of Ireland. It maintains records of incorporation, annual returns, directors and secretaries, registered charges, and constitutions.

The public-facing entry point is the CORE portal at core.cro.ie, which exposes company search, document ordering, and digital delivery. Basic search is free; document PDFs and certified copies are paid (typically €2.50 to €15 for standard documents, €12 to €40 for certified copies). Most filings are processed digitally and delivered within minutes; certified physical copies (certificates of incorporation, status letters) may take longer.

Register of Business Names (RBN)

The Register of Business Names is maintained alongside the CRO and records the trading names used by sole traders, partnerships, and companies that operate under a name other than their legal name. RBN registration is mandatory when a trader does business under any name other than the owner's surname. The register is publicly searchable through the CORE portal.

Central Register of Beneficial Ownership (RBO)

The RBO holds beneficial-ownership declarations for individuals owning or controlling more than 25% of an Irish company. Limited details (name, month and year of birth, nationality, country of residence, nature and extent of control) are released only to obliged entities under AML regulations and other persons with legitimate interest. Companies that fail to file with the RBO face fines and prosecution. Since July 2025, under the Companies Act 2024, RBO non-compliance is also grounds for involuntary strike-off from the CRO register. The CRO has actively begun striking off companies that have not filed with the RBO, as well as companies with no recorded directors. Strike-off is now the primary enforcement mechanism in practice.

Other relevant authorities

• The Revenue Commissioners handle VAT registration and tax clearance. Tax data is not public; access is limited to the entity itself or authorised third parties.
• The Courts Service publishes court-led dissolutions, bankruptcy, and examinership cases, with daily updates and free online search.

Registration and Publication Requirements

Sole traders (Trádálaí Aonair)

Sole traders are not required to register with the CRO. They register with Revenue for tax purposes and, if they trade under a name other than their own, with the RBN. Because there is no CRO record, sole-trader data is rarely available in structured form for KYB.

Associations

Non-profit and community organisations typically register as Companies Limited by Guarantee (CLG). CLGs have no share capital and members' liability is capped at a nominal guarantee. They file with the CRO under the same obligations as other limited companies (incorporation, annual returns, accounts) and must register beneficial owners with the RBO.

Companies

Ireland offers several corporate forms:

• Private Company Limited by Shares (LTD): the most common form, over 200,000 entities registered
• Designated Activity Company (DAC): limited by shares or guarantee, defined by an explicit objects clause
• Company Limited by Guarantee (CLG): mainly for charities and NGOs
• Public Limited Company (PLC): companies offering shares to the public
• Limited Partnership (LP): registered with the CRO; no separate legal personality
• Unlimited Company (UC): members carry unlimited liability

All incorporated entities must file annual returns (Form B1 / Form B1C for confirmation statements) and financial statements. Accounts are public and, depending on company size, may be abridged (small companies) or fully detailed (large companies). Changes of directors are filed on Form B10, share capital changes on Form B5, and so on.

Since July 2025, small companies that file a late annual return are entitled to a once-off opportunity per five-year cycle to do so without losing their audit exemption. Previously, a single late filing stripped the audit exemption for the following two years — a significant financial burden for small entities. This change applies to qualifying small companies under the Companies Act 2024.

With Topograph

Topograph queries the CRO and (for obliged entities) the RBO through one API, returning Irish company identity, officers, financial filings, and beneficial-ownership data where access is permitted.

Available Data

Company Profile

• Legal name, CRO number, registration date
• Registered office address and legal form
• Company status and previous names

Financial Data

• Annual accounts (Cuntais Bhliantúla)
• Filing history with links to PDFs
• Audit status and balance-sheet headline figures (where public)

Legal Representatives

• Directors' names, positions, appointment and resignation dates
• Director changes tracked via Form B10

Shareholders

• Partial shareholder data via the register of members (available on file at the company)

UBO (Ultimate Beneficial Ownership)

• RBO beneficial-ownership data for AML-obliged entities

Available Documents

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