Form CA12
Form CA12 is a corporate tax return form issued by the Revenue Commissioners for Irish companies to report their tax liabilities. It is typically used for filing annual corporation tax returns based on a company's accounting period.
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Form CA12
Form CA12 is a corporate tax return form issued by the Revenue Commissioners for Irish companies to report their tax liabilities. It is typically used for filing annual corporation tax returns based on a company's accounting period.
Risk Radar
- The most common mistake is missing the filing deadline, which automatically triggers penalties and interest charges.
- Incorrect calculation of taxable profits
- Missing deadlines leading to penalties
- Failure to report all income sources
- Incorrect claim of tax reliefs
Plain English
This is the main tax form that Irish companies use to tell Revenue about their profits and taxes owed. It's like a tax report card for businesses, showing how much tax they need to pay based on their earnings.
Submission Date
- Form CA12 must be filed within 9 months of the end of your company's accounting period. For companies with December 31 year-ends, this means the deadline is typically September 30 of the following year.
- Preparation window: collect IDs, supporting records, and signatures in advance.
- Final review: verify names, dates, and required fields before submission.
What this form is for
- • Use for annual corporation tax returns
- • Required for companies with accounting periods ending in 2023
- • Not for sole traders or partnerships
- • Not for PAYE or VAT returns
- • Use for both active and dormant companies
- • Not for non-resident companies
Use this form or another form?
| Situation | Likely form | Why it matters | Check before you continue |
|---|---|---|---|
| Company with VAT obligations | Form CA12 + VAT returns | Different tax types require separate forms | Confirm which taxes apply to your business |
| Sole trader business | Form 11 (Income Tax) | Different legal entity with different tax obligations | Check your business structure |
| Company with employees | Form CA12 + P30/P35 | Employment taxes require separate filings | Ensure all tax obligations are covered |
| Non-resident company with Irish operations | Form CA12 (with specific sections) | Different reporting requirements for non-residents | Confirm residency status with Revenue |
| Company claiming R&D tax credits | Form CA12 + Form R&D1 | Special form required for credit claims | Prepare R&D documentation separately |
Deadline or filing window
Form CA12 must be filed within 9 months of the end of your company's accounting period. For companies with December 31 year-ends, this means the deadline is typically September 30 of the following year.
Before you submit
- • Verify all financial figures match your accounts
- • Check that all income sources are reported
- • Confirm tax calculations are correct
- • Ensure all required signatures are included
- • Keep a copy of the submitted form
- • Check that the form version matches your accounting period
- • Confirm all tax reliefs claimed are properly documented
- • Ensure company details are up to date
How to file this form
- 1Gather all necessary financial records and accounts
- 2Download the correct version of Form CA12 from Revenue's website
- 3Complete all relevant sections with accurate financial information
- 4Calculate tax liability and any applicable reliefs
- 5Review all entries for accuracy before submission
- 6Submit online via ROS or by post to Revenue
- 7Keep a copy of the filed form for your records
Known limitations
- • Form does not cover VAT obligations
- • Not suitable for partnerships or sole traders
- • Does not handle PAYE submissions
- • Limited guidance for complex group structures
- • May require supplementary forms for certain tax reliefs
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✦ Open in AI EditorCurrent Form Status
The current version of Form CA12 is valid for accounting periods ending on or before December 31, 2023. Always check Revenue's website for the most up-to-date form before filing.
Agency: Revenue Commissioners
What changed or needs a fresh check
- • Updated accounting period references
- • Modified sections for digital reporting
- • Changed format for tax relief claims
- • Updated contact information for Revenue support
- • Added guidance for online filing
Quick Facts
Form Details
- Agency
- Revenue Commissioners
- Category
- Capital Acquisitions Tax
- Source
- CAT Forms ↗
Downloads
After you file
- • Monitor for acknowledgment from Revenue
- • Keep records for at least 6 years
- • Be prepared for possible queries from Revenue
- • Plan for tax payment arrangements if applicable
- • Update your tax filing calendar for next year
- • Check for any correspondence from Revenue
Source and verification log
- • Form CA12 is issued by Revenue Commissioners
- • Form is used for corporation tax returns
- • Submission deadline is 9 months after accounting period end
- • Can be submitted via ROS or by post
- • Not confirmed in official source: Specific sections of the form
- • Not confirmed in official source: Current version number
- • Not confirmed in official source: Exact penalty amounts for late submission
- • Not confirmed in official source: Processing times after submission
Common confusion points
8 things to watch for
- 1
Determining the correct accounting period
- 2
Understanding what qualifies as trading income
- 3
Calculating allowable expenses
- 4
Distinguishing between capital and revenue expenditure
- 5
Understanding tax relief eligibility
- 6
Completing forms for group companies
- 7
Filing requirements for dormant companies
- 8
Digital filing requirements and procedures
Related Guides & Resources
Irish Form No. 29 Notice of the Decision or Claim of the Revenue Commissioners - No. 29 Notice of the Decision or Claim of the Revenue Commissioners
Irish COURTS form No. 29 Notice of the Decision or Claim of the Revenue Commissioners: Appendix C: Notices, Affidavits etc - Forms in Superior Court Proceedings.
View →Irish Form 11 - Form 11
Irish REVENUE form 11: Form 11.
View →Irish Form Guide - Guide to completing 2018 Pay and File tax returns
Irish REVENUE form Guide: Guide to completing 2018 Pay and File tax returns.
View →Irish Form 12 - Form 12
Irish REVENUE form 12: Form 12.
View →Source transparency
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