What is CRO (Companies Registration Office)?
The Companies Registration Office is Ireland's company registry, equivalent to the UK's Companies House. The CRO holds the public record for every Irish company including directors, shareholders, accounts, and annual returns. Filings are made via CORE at core.cro.ie.
Current Rate (Annual filings tied to company's incorporation anniversary)
N/A — filing fees apply (€20 standard B1 ROS submission, etc.)
Example
Acme Ltd incorporated 1 March 2024 has its first Annual Return Date six months later (1 September 2024). The B1 with accounts is due within 56 days of that ARD.
How CRO (Companies Registration Office) works in Ireland
The Companies Registration Office (CRO) is the statutory body responsible for the registration and regulation of Irish companies under the Companies Act 2014. It maintains the public register of all Irish incorporated entities — private limited companies (Ltd), public limited companies (PLC), unlimited companies, limited partnerships, and registered business names. All records are publicly searchable at cro.ie, and every company has a legal obligation to keep those records current.
**CORE — Companies Online Registration Environment**
CORE (core.cro.ie) is the CRO's online filing platform. Launched in 2023 to replace the legacy paper-based system, CORE handles all common company filings: - Company incorporation (Form A1) — €50 online, takes 5–10 working days - Director and secretary appointments and resignations (Form B10) - Change of registered office address (Form B2) - Annual returns (Form B1) with accompanying accounts - Voluntary strike-off applications - Company restoration applications
Agents and accountants can hold a CORE account and manage multiple company filings from one login, similar to how ROS works for tax agents.
**Annual Return Date (ARD) and deadlines**
Every Irish company has an Annual Return Date (ARD). For a newly incorporated company, the first ARD is six months after the date of incorporation. After that, the company can choose any ARD date and is expected to file annually on that date.
The annual return (Form B1) and accompanying financial statements must be filed within 56 days of the ARD if submitting electronically via CORE, or 28 days for paper submissions. This means a company with an ARD of 30 September has until 25 November to file electronically.
Filing fees: - €20 for electronic B1 filing via CORE - €40 for paper B1 filing - Late filing penalty: €100 once off, plus €3 per day up to a maximum of €1,200
**Audit exemption loss for late filing — the most costly Irish compliance mistake**
Irish small and medium companies are generally exempt from mandatory audit if they meet two of three size criteria: turnover below €12m, total assets below €6m, and fewer than 50 employees. However, if a company files its annual return even one day late, it automatically loses audit exemption for the year in which the late return falls and the immediately following year — a two-year penalty. This can add €2,000–€5,000+ in accounting fees to years that would otherwise be audit-exempt. There is no appeal or exception process: one day late means two years of mandatory audit. This rule is far stricter than the equivalent in the UK.
**What accounts must be filed publicly**
The type of accounts required depends on company size: - Micro companies (turnover below €700k, assets below €350k, employees below 10): abbreviated micro-entity accounts (Balance Sheet only, very limited disclosure) - Small companies: abridged accounts (Balance Sheet and key notes — the P&L is not required on the public register) - Medium and large companies: full statutory financial statements including directors' report
The CRO does not review or audit filed accounts for accuracy — it only checks that they are filed within the deadline and are in the correct format.
**CRO vs UK Companies House — key differences**
| Aspect | CRO (Ireland) | Companies House (UK) | |--------|--------------|----------------------| | Late filing penalty | Loss of audit exemption for 2 years + €100 + €3/day | Financial penalty only (£150–£1,500) | | Accounts required with annual return | Yes, mandatory | Yes, but micro/small can file dormant or abbreviated | | EEA-resident director | At least one required, or Section 137 bond of €25,000 | No residency requirement | | Online system | CORE (2023+) | Companies House Web Filing | | Incorporation fee | €50 online | £50 online |
The Section 137 bond requirement is a notable difference: if an Irish company has no EEA-resident director, it must take out a bond with a licensed insurer for €25,000. The bond is not insurance — it is a guarantee that the company will pay any fines or liabilities arising from Irish law. The annual premium is typically €1,000–€1,500.
Related terms
Form B1 is the annual return Irish companies must file with the CRO each year. It confirms key company details (directors, shareholders, registered office) and is accompanied by financial statements (or abridged accounts for small companies). Late filing triggers loss of audit exemption for two years and €100 penalty plus €3 per day.
An Irish private limited company (Ltd, formerly LTD or Limited By Shares) is the most common business entity in Ireland. It is a separate legal entity from its owners, with limited liability, and is governed by the Companies Act 2014. Companies must have at least one EEA-resident director or hold a Section 137 bond.
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