When is the Pay and File Income Tax Return Deadline For Income Earned in 2023 for Ireland? A. For income earned in 2023 the required date to submit both returns and payments is no later than 31 October 2024. By Cathal Maxwell|2025-05-23T08:38:42+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.