This article is for Irish company directors and business owners who need to file their annual return with the CRO but aren't sure what's involved or when it's due.
If you're wondering what goes in Form B1, how to avoid late filing penalties, or whether you qualify for audit exemption, this guide covers the complete filing process, deadlines, required documents, and consequences of missing your deadline.
Key Takeaways
• Your first annual return is due exactly six months after incorporation, with a 28-day filing window.
• Late filing triggers automatic penalties: €100 immediately, then €3 per day up to €1,200 maximum per return.
• Missing two consecutive annual returns results in loss of audit exemption for two years, regardless of company size.
• Small companies with turnover under €12 million, assets under €6 million, and fewer than 50 employees qualify for audit exemption.
• Persistent non-filing can lead to company strike-off, dissolving your company and vesting all assets in the state.

What Is an Annual Return?
An annual return is a statutory filing providing the Companies Registration Office with current information about your company.
Section 343 of the Companies Act 2014 requires every company to file annual returns showing directors, secretary, shareholders, and registered office.
The return creates a public record of your company's current structure at a specific point in time each year.
Think of it as your company's annual check-in with the state, confirming who owns it and who runs it.
When Is Your First Return Due?
The first annual return date (ARD) falls exactly six months after your incorporation date. For example, if you incorporated on the 15 January 2025, the first ARD is 15 July 2025. The filing window opens 15 July and closes 28 days later on 12 August 2025.
The six-month period gives new companies time to establish operations before the first compliance deadline hits. This initial return requires no financial statements, making it simpler than subsequent filings.
After the first filing, annual returns are due every 12 months on the same calendar date. Each ARD opens a 28-day filing window, so you must file between the ARD and 28 days later.
What's Included in Form B1?
Form B1 is the official annual return document filed electronically through the CRO's CORE system. The form requires:
Company information:
- Company name and registration number
- Registered office address
- Principal business activity codes
- Details of share capital structure
People information:
- Full list of directors with addresses and dates of birth
- Company secretary details
- Complete shareholder register with shareholdings
- Beneficial owners over 25% threshold
Financial information (after first return):
- Financial statements for the relevant period
- Audit report if not exempt
- Directors' report
All information must be current as of the ARD, not the filing date. The first annual return requires no financial statements - it's a "no accounts return." All subsequent returns must include financial statements covering the period since the last return.
The statements must be dated within nine months of the ARD, signed by directors confirming accuracy and audited unless the company qualifies for audit exemption. Small companies often qualify for abridged accounts with simplified disclosure requirements.
What Are the Late Filing Penalties?
Late filing triggers automatic penalties that increase daily until you file. The penalty structure is:
- €100 immediate penalty on the first day late
- €3 per day additional penalty for each subsequent day
- €1,200 maximum total penalty cap
These penalties are non-negotiable - the CRO has no discretion to waive them regardless of your reasons. Missing your deadline two years consecutively triggers loss of audit exemption for the next two years.
This means you must have accounts audited even if you're small enough to be exempt. The requirement lasts two full years regardless of subsequent compliance. The penalty far exceeds the direct late filing fines and affects companies for years afterward.
How Do You File the Annual Return?
Annual returns must be filed electronically through the CRO's CORE system at core.cro.ie.
The filing process involves:
- Log into CORE using your company login credentials
- Select "File a Form" and choose Form B1
- Complete sections with current company information
- Upload documents including financial statements (if required)
- Review summary checking all information is accurate
- Pay filing fee (€40 for online filing)
- Submit and save confirmation for your records
The system guides you through each section with validation checks preventing common errors.
What If Your Details Have Changed?
The annual return must show your company's current position as of the ARD.
If changes occurred since your last return:
- Director changes: Show current directors, noting appointment and resignation dates
- Address changes: File Form B10 separately within 14 days of change
- Shareholding changes: Reflect current ownership at ARD
- Secretary changes: File Form B10 and update the annual return
The annual return isn't the mechanism for notifying changes - Form B10 handles that within required timeframes.
Can You Change Your Annual Return Date?
Yes, companies can apply to change their ARD by filing Form B73 with the CRO.
Reasons for changing ARD include aligning with financial year-end for easier accounting, grouping multiple company returns on the same date and avoiding busy periods in your business calendar.
The application costs €50 and the CRO typically approves changes if there's reasonable justification. However, you cannot use ARD changes to avoid late filing penalties on overdue returns.
What Is Audit Exemption?
Small companies meeting certain thresholds can claim audit exemption under Section 360.
The thresholds for exemption are:
- Turnover: Less than €12 million
- Balance sheet: Less than €6 million
- Employees: Fewer than 50
Companies claiming exemption must include a statutory declaration on their accounts confirming they meet the criteria. Most Irish SMEs qualify for audit exemption, significantly reducing their annual compliance costs.
The directors must confirm audit exemption eligibility when preparing financial statements. The confirmation involves verifying turnover, assets, and employee numbers, signing the declaration on the financial statements and indicating audit exemption when filing.
The company secretary or accountant typically handles this process when preparing the annual return.
What Happens If You Don't File?
Persistent non-filing triggers increasingly serious consequences beyond the daily penalties.
The escalation typically follows:
- Automatic penalties accumulating to €1,200 maximum
- CRO correspondence warning of non-compliance
- Strike-off notice threatening company dissolution
- Prosecution for directors in serious cases
- Actual strike-off dissolving the company and vesting assets in the state
The CRO takes non-filing seriously because annual returns are fundamental to the public register's accuracy. The €1,200 penalty cap applies per return, but multiple overdue returns stack penalties. Companies with multiple overdue returns face substantial penalties plus potential strike-off proceedings.
What Supporting Documents Are Needed?
The annual return filing requires attaching specific documents depending on your circumstances. Standard attachments include financial statements, audit report, directors’ report and consolidated accounts for group situations.
All documents must be in PDF format and uploaded during the online filing process. The CORE system won't accept filings without required attachments, preventing incomplete submissions.
Can You Amend Filed Returns?
Yes, if you discover errors after filing, you can submit an amended return. The amendment process involves:
- File Form B1A showing corrected information
- Pay €40 fee for the amendment filing
- Explain changes in the amendment notes
- Attach corrected documents if financial statements changed
Amendments don't avoid late filing penalties if the original return was late. However, correcting errors quickly demonstrates good governance and protects against potential issues.
What Records Should You Keep?
Maintain comprehensive records of all annual return filings for at least six years.
Essential records include:
- Filing confirmations from CORE showing submission date
- Filed accounts matching what was submitted
- Payment receipts for filing fees
- Director approvals for accounts and returns
- Correspondence with CRO about any issues
These records prove compliance during due diligence, audits, or if CRO queries arise.

Stuart Connolly is a corporate barrister in Ireland and the UK since 2012.
He spent over a decade at Ireland's top law firms including Arthur Cox & William Fry.









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