- 1 August 2021–Due date for payment of Corporation Tax for period ended 31 October 2020.
- 2 August 2021– Deadline for submitting P46 (Car) for quarter ending 5 July 2021.
- 7 August 2021– Deadline for VAT returns and payments of Accounting Quarter period ending 30 June 2021.
- 19 August 2021– Monthly deadline for postal payments of CIS, NICs and PAYE to HMRC
- 22 August 2021– Monthly deadline for electronic remittance of CIS, NICs and PAYE to HMRC.

