I have exceeded the VAT threshold. Am I liable for the VAT? a) If you exceeded the VAT threshold and failed to register, you will be liable any VAT due and may incur interest and penalties for late payment. By Cathal Maxwell|2025-05-23T08:09:35+01:00May 23, 2025|Tax Return Self Assessment 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.