When Does the New Tax Year Start UK? 2026 MTD & Tax Updates
2026/27 At a Glance Tax Year 2026/27 Details Tax year starts 6 April 2026 Tax year ends 5 April 2027 Personal allowance £12,570 (frozen) Higher rate threshold £50,270 (frozen) MTD mandatory from 6 April 2026 (£50,000+ income) Self Assessment deadline 31 January 2027 April used to be a quiet administrative reset. In 2026, it isn’t.

