1 Corporation tax due for year end 31st March of previous year.
31 Deadline for online filing of your self assessment tax return
28 Unpaid balance of tax for previous year
31 Deadline for submission of corporation tax return for the previous year ended 31st March.
Companies House filing deadline for the year ended 30th June for the previous year.
4 ISA contribution deadline
5 Tax year-end calculate IR35 pay
6 New tax year starts
19 Deadline for payment of PAYE for previous tax year and IR35 tax.
Submission of end of tax year PAYE declarations to HM Revenue and Customs under RTI
31 Issue P60’s to employees
30 Calculate VAT partial exemption adjustment for year end 31st March.
5 PAYE settlement to be agreed.
6 Forms P11d to be submitted to H M Revenue and Customs for previous tax year.
19 Pay class 1a national insurance
31 Payment of second instalment of tax for the previous tax year.
30 Companies House filing deadline for the year ended 31st December of the previous year.
1 Due date for payment of corporation tax for year ended 31st December of the previous year.
31 Filing deadline for submission of paper based self assessment tax returns for year end 5th April.
30 Deadline for filing self assessment tax returns if you want your tax liability to be coded out (if less than £3,000).
31 Due date for submission of corporation tax return for the year ended 31st December of the previous year.