How Many Days Until the Self Assessment deadline?
A live countdown to the Self Assessment deadline (31 January).
The deadline for filing an online Self Assessment tax return, and paying any tax owed for the previous tax year, is 31 January. If your bill is over £1,000 you may also make a second payment on account on 31 July.
the Self Assessment deadline (31 January): dates for the next five years
| Year | Date | Day |
|---|---|---|
| 2026 | 31 January | Saturday |
| 2027 | 31 January | Sunday |
| 2028 | 31 January | Monday |
| 2029 | 31 January | Wednesday |
| 2030 | 31 January | Thursday |
Key dates around the Self Assessment deadline (31 January)
| Date | 2026 | 2027 | 2028 |
|---|---|---|---|
| Register for Self Assessment (new filers) | Mon 5 October | Tue 5 October | Thu 5 October |
| Paper return deadline | Sat 31 October | Sun 31 October | Tue 31 October |
| Online return and payment deadline | Sat 31 January | Sun 31 January | Mon 31 January |
| Second payment on account | Fri 31 July | Sat 31 July | Mon 31 July |
Key Self Assessment dates
- 31 January: online return filed and tax paid for the tax year that ended the previous April, plus the first payment on account for the next year.
- 31 July: second payment on account, if you make them.
- 5 October: deadline to register for Self Assessment if you are new.
Missing the 31 January deadline leads to an automatic penalty, even if you owe no tax. Use our self-employed tax calculator to estimate what you will owe.
Frequently asked questions
How many days until the Self Assessment deadline?
The counter at the top of this page shows the exact number of days, hours, minutes and seconds to go, and updates as you watch.
What day is the Self Assessment deadline (31 January) in 2027?
Sunday, 31 January 2027.
What day is the Self Assessment deadline (31 January) in 2028?
Monday, 31 January 2028.
How many weeks until the Self Assessment deadline?
The counter also shows the time to go in weeks and days, and the number of weekdays (Monday to Friday) left, which is useful for planning.
Figures are for the 2026/27 tax year from official sources and are estimates for guidance only, not financial or legal advice. Printed from ukanswers.co.uk.