As communicated by Revenue earlier this year, the corporation tax surcharge suspension introduced in response to COVID-19 will end on 30 June.  Forms CT1 filed after this date will be surcharged as normal by reference to their original filing due date as per Section 1084 TCA 1997.   The normal surcharge is 5 percent when a return is filed within 2 months of the filing date and increases to 10 percent when a return is late by 2 months or more. 

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