What is the USC? USC is a tax payable on your total income There is no relief for pension contributions.. By Cathal Maxwell|2025-05-22T22:44:55+01:00May 22, 2025|PAYE Tax Return 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.