When is capital gains tax return Ireland 2023 deadline? A. No later than 31 October 2024 By Cathal Maxwell|2025-05-23T08:40:46+01:00May 23, 2025|Tax Return Deadlines FAQs| Share This Story, Choose Your Platform! FacebookXBlueskyRedditLinkedInWhatsAppTelegramTumblrPinterestXingEmail About the Author: Cathal Maxwell Cathal brings over 40 years of tax experience, advising individuals and businesses on Income Tax, Capital Taxes, Inheritance Tax, Stamp Duty, and VAT.