UK Tax Year Start

UK Tax Year Start Quick Facts

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2021 Date	6 April 2021
2022 Date	6 April 2022

2021 Holidays & Dates

UK Tax Year Start in 2021

Tuesday, 6 Apr

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UK Tax Year Start History

UK Tax Year Start was a changing of the tax date in the 18th century to ensure no revenue would be lost for the Royal Crown. In 1752, to be in alignment with the rest of Europe, England decided to remove 11 days from the month of September. The British Treasury, wanting to ensure no tax revenue was lost, added these 11 days at the end of the year. This decision caused the tax year in 1753 to be moved to 5 April.

In 1800, one more adjustment was made to the UK Tax Year. To make up for the differences between the Julian and Gregorian calendars, the British Treasury counted the year 1800 as a leap year. This made 6 April the new date of the tax year. The UK Tax Year continues to be observed annually on 6 April.

UK Tax Year Start Facts

The Julian calendar had been in use since 45 BCE. Pope Gregory Xiii decided to change it to the Gregorian calendar in 1582. It wasn't adopted in the British Empire until 1752 however.
The switch from the Julian calendar to the Gregorian calendar reduced the length of the calendar year from 365.25 days to 365.2425 days. This small change equated to about 10 minutes and 48 seconds per year lost.
The UK raises most of its tax revenue from consumption taxes (32%). This is followed by social insurance taxes (26%), and then individual taxes (24%).