What is Form B1 (Annual Return)?
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.
Current Rate (56 days after the company's Annual Return Date (ARD).)
N/A — €20 ROS filing fee. Late penalty: €100 + €3/day, max €1,200.
Example
A company with ARD 30 September must file Form B1 by 25 November (56 days later). Missing this date means a €100 penalty plus €3/day, plus loss of audit exemption for 2 years.
How Form B1 (Annual Return) works in Ireland
Form B1 is the statutory annual return that every Irish company must file with the Companies Registration Office (CRO) each year. It is separate from the Corporation Tax return (CT1) filed with Revenue — two different annual obligations with different deadlines and different consequences for non-compliance.
**What the B1 contains**
The B1 return confirms the company's current statutory information as of the Annual Return Date (ARD): - Registered office address - Principal place of business - Description of business activity - Full list of directors and secretary (names, addresses, dates of birth, other directorships) - Share capital structure (authorised, issued, and paid-up shares) - Shareholder details (names and share holdings) - A declaration signed by a director and the company secretary confirming the accuracy of the information
The B1 is accompanied by financial statements: abridged accounts (Balance Sheet and notes, but not the P&L) for small companies, or full statutory financial statements for medium and large companies.
**Annual Return Date (ARD) — when is the B1 due?**
Every company has an Annual Return Date (ARD). The rules: - Newly incorporated company: first ARD is exactly 6 months after the date of incorporation - Subsequent years: the ARD is an anniversary-style date. Companies can apply to the CRO to extend the ARD once every 5 years (allowing the date to be shifted forward up to a maximum of 6 months) - Filing deadline: 56 days after the ARD (for electronic submission via CORE)
Example timeline: - Incorporated 15 March 2024: first ARD = 15 September 2024. B1 due by 10 November 2024. - Second year ARD = 15 September 2025. B1 due by 10 November 2025.
**Penalties for late filing — the audit exemption trap**
Irish law imposes two distinct consequences for filing a B1 after the 56-day deadline:
1. **Financial penalties**: €100 once-off plus €3 per calendar day for each day the return remains overdue, up to a maximum accumulated late fee of €1,200.
2. **Mandatory loss of audit exemption**: The far more costly consequence is automatic loss of the small company audit exemption for the financial year in which the late return falls, and the following financial year. This cannot be waived or appealed. A company that qualifies as a small company (and would normally be audit-exempt) but files its B1 one day late must have its accounts audited for two consecutive years. The cost of a statutory audit for an Irish SME is typically €3,000-€6,000 per year, so a one-day slip can cost €6,000-€12,000 in audit fees.
**Small company size criteria for audit exemption**
A company qualifies as a small company (and is therefore audit-exempt) if it meets at least two of three criteria: - Annual turnover does not exceed €12 million - Balance sheet total does not exceed €6 million - Number of employees does not exceed 50
Micro companies have even lower thresholds (€700k turnover, €350k assets, 10 employees) and can file even more abbreviated accounts.
**How to file the B1**
The B1 is filed through CORE (core.cro.ie). There is no paper submission option for standard annual returns (paper is only available in exceptional circumstances). The filing involves: 1. Logging into CORE with the company's registered presenter account 2. Confirming or updating company details, directors, and share information 3. Uploading the financial statements (as a PDF) 4. Completing the declaration and signing with the company's digital credentials 5. Paying the €20 electronic filing fee
Many Irish accountants file the B1 on behalf of their clients and maintain the CORE access. The company is ultimately responsible for ensuring the B1 is filed on time, regardless of whether an agent is used.
**Common B1 mistakes**
- Missing the ARD date: the ARD is not always the same as the company year-end. These are two separate annual obligations with separate dates. - Forgetting a newly incorporated company's first ARD (6 months after incorporation) is earlier than the first accounting year-end - Uploading an unsigned or incomplete set of financial statements, which the CRO rejects — the 56-day clock keeps running - Using an old version of CORE credentials after a director change, causing submission failures
Related terms
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.
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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