Revenue has published new guidance on the completion of corporation tax returns, which includes updates on the 2025 Form CT1 together with information outlining how to access help in completing the form. The Form CT1 for accounting periods ending in 2025 has been available for filing via ROS and the ROS Return Preparation Facility (RPF) since April 2025 with additional updates being made to the form in June.
The guidance includes the following updates for 2025:
- Updates to the company details panel (paragraph 1) including de minimis aid and transfer pricing.
- Updates to the trading results panel (paragraph 2) including a new section for lease taxation section 403/404.
- Changes to the extracts from accounts panel (paragraph 3) including text changes for iXBRL filing and expenses and deductions for stock exchange listings expenditure.
- Changes to the Irish investment and other income panel (paragraph 4) for an R&D clawback.
- Changes to the foreign income panel (paragraph 5) relating to foreign life policies and offshore funds.
- Changes to the deductions, reliefs and credits panel (paragraph 6) relating to stock exchange listing expenditure.
- Changes to the research and development panel (paragraph 7) including unused carry forward, section 766C and S766D.
- Changes to the film tax panel (paragraph 8) for the Scéal Enhanced Credit.
- Clarification around certain fields relating to lease taxation.
The Institute continues to engage with Revenue through the TALC Collections Sub-committee to propose ways to simplify and reduce complexity of the Form CT1 for 2026.
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