Income Tax Return Deadline Dates 2021

The deadlines for the 2020 Self Assessment Income Tax returns are given below.

The online (ROS) extended pay and file deadline for 2020 income tax returns and for beneficiaries liable to Capital Acquisitions Tax (CAT) is 31st October 2021 for paper tax returns and 17th November 2021 For ROS Filers .

PAYE customers who are required by Revenue to file a Form 12 for 2020 and who opt to use the online version, the deadline date is also 17th November 2021.

If you are doing a paper-based Form 11  Tax return for the year ending 31st Dec 2020 – it is due to be with  Revenue by the 31st October 2021


There will be late filing penalties if tax returns are not made in time.

If you file your Income-tax return late, a surcharge may be added on to your tax due, as follows:

  • If you miss the deadline of 31/10/201 (or 17/11/2021 for ROS customers) and you file your tax return before 31st December 2021, there is an extra penalty of 5% of the tax due (maximum of €12,695)
  • If you file your 2020 tax return after 31st December 2021, there is an extra penalty of 10% of the tax due (maximum of €63,485),

Capital Gains Tax

CGT Deadline is 15 Dec 2021. Payment is due on gains arising between 1 January 2021 to 30 November 2021. Use CGT Payslip A

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