UK Tax Year Dates
As of Tuesday, November 10, 2026, the current tax year in the UK is 2026/27, running from Monday, April 6, 2026 to Monday, April 5, 2027. Today is day 219 of 365 (60% complete), with 146 days left.
About This Calculator
UK tax year dates run from 6 April to 5 April the following year, and the tax year is written with both years — 2026/27 for 6 April 2026 to 5 April 2027. The unusual start date is a historical quirk dating back to the switch from the Julian to the Gregorian calendar. This is different from the UK government financial year (used for corporation tax and public spending), which runs 1 April to 31 March — "the tax year" that applies to your personal income, ISA, and pension allowances is the 6 April one.
UK tax year dates, 2024/25 to 2028/29:
- 2024/25: 6 April 2024 to 5 April 2025
- 2025/26: 6 April 2025 to 5 April 2026
- 2026/27: 6 April 2026 to 5 April 2027
- 2027/28: 6 April 2027 to 5 April 2028
- 2028/29: 6 April 2028 to 5 April 2029
Key dates within each tax year: 5 April is the deadline to use that year's ISA and pension annual allowances before they reset; 31 October (paper) and 31 January (online) are the Self Assessment filing deadlines for the tax year that ended the previous 5 April; and 31 January is also the payment deadline for any tax owed for that year.
Beyond the reference dates above, this page is a full calculator: enter any date and it shows which tax year it falls in, the exact start and end dates, how many days into the year the date is, and how many days remain until 5 April. A date on or after 6 April belongs to the tax year starting that April; a date from 6 January to 5 April belongs to the tax year that began the previous April — the calculator handles that boundary for you, with timezone-safe maths so a date always returns the same tax year.
To use it, read the current tax year on load, pick a past or future date to check it, or use the table above for a quick lookup. For other countries, see the India financial year, Australian financial year, and US fiscal year calculators.
The current tax year at a glance
- Current tax year: 2026/27
- Starts: Monday, April 6, 2026
- Ends: Monday, April 5, 2027
- Today: day 219 of 365 (60% of the year has passed)
- Days left: 146
- Quarter: Q3
- Next tax year starts: Tuesday, April 6, 2027
How It Works
- Choose a date (defaults to today).
- Click “Find the financial year”.
- See which financial year it falls in, the start and end dates, and how far through you are.
Formula & Methodology
The result is worked out as follows:
FY = the year window containing the date; progress = days elapsed ÷ total daysThe UK personal tax year is the 6 April – 5 April window containing the date: the year starting this 6 April if the date is on or after 6 April, otherwise the year that started the previous 6 April. Days remaining runs to 5 April.
Worked Examples
For 16 August 2026, the result is 2026/27 tax year (6 Apr 2026 – 5 Apr 2027).
For 5 April 2026, the result is 2025/26 tax year — its last day.
For 6 April 2026, the result is First day of the 2026/27 tax year.
Frequently Asked Questions
What are the UK tax year dates for 2026/27?
The 2026/27 tax year runs from 6 April 2026 to 5 April 2027. See the full 2024/25 to 2028/29 table above for other years.
Why does the UK tax year start on 6 April?
It is a historical artefact of the calendar change in 1752 and later adjustments, which shifted the old new-year date of 25 March to 6 April.
What are the key Self Assessment deadlines?
31 October for paper returns and 31 January for online returns, both for the tax year that ended the previous 5 April. 31 January is also the deadline to pay any tax owed for that year.
Is the tax year the same as the financial year?
Not quite. The personal tax year is 6 April to 5 April, while the UK government financial year (corporation tax, public spending) runs 1 April to 31 March. This page uses the 6 April personal tax year.