September

14         Corporation tax second quarterly instalment payment for very large companies with annual taxable profits exceeding £20m (reduced if company is a member of one or more 51% groups) with an accounting period beginning on 1 Apr 2019

19         PAYE cheque payments for the month ended 5 Sep should reach HMRC by this date (22 Sep for electronic payments).

19         Online Construction Industry Scheme (CIS) return for month ended 5 Sep