Self-assessment deadline (balancing payments)
Deadline for online submission of self-assessment balancing payments for 2017/18 tax year.
Self-assessment deadline (payment on account)
Deadline for first self-assessment payment on account for tax year ended 5 April 2018.
Corporation tax payment
Corporation tax payment due for year end 30 April 2018, for those companies not liable to pay their liability by instalments.
CIS return
Construction Industry Scheme: monthly return due for period up to 5th of previous month.
Corporation tax payment
Corporation tax payment due for year end 31 May 2018, for those companies not liable to pay their liability by instalments.