When Does New Tax Year Start 2025 Uk. The 2024/25 tax year begins on 6 april 2024 and ends on 5 april 2025. Here are your self assessment tax return dates, and other.

Second payment on account due; Since october 2014, hmrc has been sending out an annual tax summary for the previous tax year (so for this year it will be paye income earned between april 6th 2024 and april 5th 2025).