21 September 2021
Due date for payment of supplementary declarations for August 2021.
22 September 2021
Monthly electronic PAYE/class 1 NICs/student loan payment
If paying electronically, pay PAYE, class 1 NICs, student loan deductions and deductions from payments to subcontractors for the month up to the 5th of this month.
30 September 2021
End of CT61 quarterly period.
Company accounts filing deadline
Deadline for filing your company tax return is 12 months after your accounting period for corporation tax ends.
Corporation tax return
Filing deadline for corporation tax return self-assessment form CT600 for period ended 30 September 2020 to be submitted to HMRC.
01 October 2021
Corporation tax payment
Corporation tax payment due for year end 31 December 2020, for those companies not liable to pay their liability by instalments.
05 October 2021
Income tax and capital gains
Taxpayers who do not receive a self-assessment tax return to complete must notify HMRC by 5 October if they had income or capital gains in the previous tax year on which further tax is due.
07 October 2021
Due date for August VAT returns unless exempted.
14 October 2021
Due date for income tax for the CT61 quarter to 30 September 2021.
19 October 2021
Quarterly postal PAYE/class 1 NICs payment
Q2 (2021/22) PAYE/NIC payment due where paid by cheque. The cheque must be with HMRC by this date in order to avoid automatic interest charge.