Running a business in 2023? Here are some important dates for your financial diary.


31st January 2023

Online self-assessment tax return deadline date for 2021/2022.
Deadline to pay any tax/national insurance owed to HMRC.

6th April 2023

The beginning of the 2023/2024 tax year. New tax rates and allowances come into effect on this day.

19th April 2023

The deadline for final PAYE submissions due for the 2022/2023 tax year ending on April 5th, 2023.

30th April 2023

Start of penalties for any unfiled Self-Assessment tax forms from the previous tax year are applied.

5th July 2023

Last day to agree on a PAYE Settlement Agreement with HMRC.

31st July 2023

Last day to make a second payment for your taxes owed from the previous tax year.
Not bringing your account up to date will incur penalties and interest.

31st October 2023

The deadline for submission of paper tax returns for the tax year which ends 5th April 2023.

5th April 2024

The end of the 2023/2024 tax year.