Fiscal Year 2025 Dates Uk. Here is a summary of some of the main uk tax year dates and tax return deadlines for the 2025/25 tax year,. The first day of a new tax year often means that new tax rates, thresholds and rules come into force.

By 2025 we will set out how farmers will be. The uk tax year, also known as the fiscal year, begins on the 6th of april and ends on the 5th of april the following year.