When should I pay the balance of my 2025 income tax liability?A. No later than 31 October 2026, or 18th November 2026 if qualifying for the extended online deadline.By Cathal Maxwell|2026-09-25T12:26:42+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.