UK Tax Year Guide
Find out which UK tax year any date falls into, see every key Self Assessment deadline, and check the current income tax bands and allowances.
Find Your UK Tax Year & Deadlines
Pick any date to instantly see which UK tax year it falls into, along with the Self Assessment deadlines that apply to that tax year.
Tax Year Finder
Work out your tax year and key dates in seconds.
How it Works
Understanding the UK tax year
Pick a Date
Choose any date — today, a past payslip date, or a future planning date.
See the Tax Year
The tool works out which 6 April–5 April tax year your date falls into.
Check the Deadlines
View the registration, filing and payment deadlines for that tax year.
Plan Ahead
Use the dates to set reminders well before each deadline arrives.
2025/26 Income Tax Bands (England, Wales & NI)
Current income tax bands and allowances for the 2025/26 tax year. Scotland has its own separate income tax bands and rates.
| Band | Taxable Income | Tax Rate |
|---|---|---|
| Personal Allowance | Up to £12,570 | 0% |
| Basic Rate | £12,571 – £50,270 | 20% |
| Higher Rate | £50,271 – £125,140 | 40% |
| Additional Rate | Over £125,140 | 45% |
| Personal Allowance Taper | Reduced by £1 for every £2 earned over £100,000 — fully withdrawn by £125,140 | |
UK Tax Year FAQ
Answers to the most frequently asked questions about the UK tax year, its dates, and key Self Assessment deadlines.
The UK tax year runs from 6 April to 5 April the following year. For example, the 2025/26 tax year runs from 6 April 2025 to 5 April 2026. This applies to Income Tax, National Insurance, ISA allowances, and most personal tax matters.
The date is a historical leftover from the switch from the Julian to the Gregorian calendar in 1752. The old tax year began on 25 March (Lady Day), but 11 days were lost in the calendar change. To avoid losing tax revenue, the start date was moved to 5 April, and a further adjustment in 1800 shifted it to 6 April, where it has remained ever since.
The personal tax year runs from 6 April to 5 April and is used for Income Tax and National Insurance. The UK Government’s financial year, used for Corporation Tax and public spending, runs from 1 April to 31 March. Many businesses align their own accounting year with one of these dates, but they are not required to.
Missing the 31 January online filing deadline triggers an automatic £100 penalty, even if you have no tax to pay, with further daily and percentage-based penalties the longer you delay. Interest is also charged on any tax paid late, so it’s best to file and pay as early as possible if you think you might miss the deadline.