Key HMRC dates for the 2026/27 tax year (6 April 2026 to 5 April 2027).
-
File online to pay through your tax code
File your 2025/26 return online by today and, if you owe less than £3,000 and are employed, HMRC can collect it through your tax code.
Add to Google Calendar -
Self Assessment return and payment due
File your 2025/26 return online, pay the balance for 2025/26 and your first payment on account for 2026/27. HMRC doesn't move this date for weekends.
Add to Google Calendar -
Making Tax Digital quarterly update
For the quarter 6 October 2026 to 5 January 2027, if you're in Making Tax Digital for Income Tax (income over £50,000).
Add to Google Calendar -
End of the 2026/27 tax year
Last day to use this year's £20,000 ISA allowance and pension annual allowance.
Add to Google Calendar -
2027/28 tax year starts
Tax on savings and property income rises to 24%, 44% and 49%. Making Tax Digital starts for incomes over £30,000. Business Asset Disposal Relief's lifetime limit falls to £500,000.
Add to Google Calendar -
Making Tax Digital quarterly update
For the quarter 6 January to 5 April 2027.
Add to Google Calendar -
P60 from your employer
Your employer must give you a P60 for 2026/27, showing your pay and tax.
Add to Google Calendar -
P11D deadline
Employers report 2026/27 benefits in kind and give employees a copy.
Add to Google Calendar -
Register for Self Assessment
If you need to file for 2026/27 for the first time, for example after becoming self-employed.
Add to Google Calendar -
Paper Self Assessment return due
Paper returns for 2026/27. Online returns have until 31 January 2028.
Add to Google Calendar -
Making Tax Digital quarterly update
For the quarter 6 July to 5 October 2027.
Add to Google Calendar -
Self Assessment return and payment due
File your 2026/27 return online, pay the balance and your first payment on account for 2027/28.
Add to Google Calendar
Source: HMRC on GOV.UK: Self Assessment deadlines, payments on account, Making Tax Digital for Income Tax, Budget 2026. If a date falls on a weekend or holiday, the deadline is usually the next working day; the dates above already allow for that where the tax authority says so.