Tax and business calendar

Details of compliance and regulatory deadlines.

To see expired deadlines, please use the following link: Expired deadlines

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19 Aug 2018

  • CIS return

    Construction Industry Scheme: monthly return due for period up to 5th of previous month.

  • Monthly postal PAYE/class 1 NICs/student loan payment

    If you pay by cheque through the post, monthly payments due for PAYE, class 1 NICs and student loan deductions from July 2018.

21 Aug 2018

  • EC sales list

    Deadline for online monthly or quarterly return filing.

  • Intrastat

    Due date for payment of supplementary declarations for July 2018.

22 Aug 2018

  • 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.

31 Aug 2018

  • 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 31 August 2017 to be submitted to HMRC.

01 Sep 2018

  • Corporation tax payment

    Corporation tax payment due for year end 30 November 2017, for those companies not liable to pay their liability by instalments.

  • Advisory fuel rates

    New fuel rates come into force.

07 Sep 2018

  • VAT return

    Due date for July VAT returns unless exempted.

14 Sep 2018

  • EC sales list

    Deadline for paper monthly or quarterly return filing.

19 Sep 2018

  • CIS return date

    Construction Industry Scheme: monthly return due for period up to 5th of previous month.

  • Monthly postal PAYE/class 1 NICs/student loan payment

    If you pay by cheque through the post, monthly payments due for PAYE, class 1 NICs and student loan deductions from August 2018.

21 Sep 2018

  • EC sales list

    Deadline for online monthly or quarterly return filing.

  • Intrastat

    Due date for payment of supplementary declarations for August 2018.

22 Sep 2018

  • 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 Sep 2018

  • Corporation tax return

    Filing deadline for corporation tax return self-assessment form CT600 for period ended 30 September 2017 to be submitted to HMRC.

  • Disclosing undeclared offshore tax liabilities

    Deadline for disclosing undeclared offshore tax liabilities (relating to income tax, capital gains tax or inheritance tax for the relevant periods) to HMRC is on or before 30 September 2018.

  • CT61

    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.

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