Diary of main tax events December 2018 / January 2019

Date  /  What’s Due

1/12/18 

Corporation tax for year to 28/02/2018 unless quarterly instalments apply

19/12/18  

PAYE & NIC deductions, and CIS return and tax, for month to 5/12/18 (due 22/12 if you pay electronically)

30/12/18 

Deadline for filing 2017/18 tax return online in order to request that HMRC collect outstanding tax via the 2019/20 PAYE code

1/1/19

Corporation tax for year to 31/03/2018 unless quarterly instalments apply

19/1/19

PAYE & NIC deductions, and CIS return and tax, for month to 5/1/19 (due 22/12 if you pay electronically)

31/1/19

Deadline for filing 2017/18 self-assessment tax return online and paying your outstanding tax for 2017/18.