HMRC Important Dates
Deadline for filing Income Tax return with HMRC if you want any Tax collected through your PAYE Coding (under 3,000). Balance of any tax, national insurance and student loan owed to HMRC for 2014/15 must be paid. 1st Payment on Account of tax for 2015/16 due to HMRC LAST DAY TO FILE YOU INCOME TAX RETURN. End of Current Tax Year. 2nd Payment on Account of tax for 2016/17 due to HMRC. Important Dates for Companies:. Corporation Tax payments are due 9 months and 1 day following your financial year end.