1. Pay and File for Corporation Tax
Pay and file system
Self assessment
Calculate and pay preliminary tax
File a return
Pay any balance of tax by return filing date

2. Pay and File for Corporation Tax
Preliminary tax
Different rules apply to small and large companies
A small company is a company where the tax liability for the preceding accounting period did not exceed €200,000
A large company is a company where the tax liability for the preceding accounting period did exceed €200,000

3. Pay and File for Corporation Tax
Preliminary tax for a small company
Due on the 23rd day of the month prior to the final month of the accounting period (11th month of accounting period).
Minimum payment due is the lower of:
90% of the current accounting period liability, or
100% of the previous accounting period’s liability.

4. Pay and File for Corporation Tax
Preliminary tax for a large company
Two instalments
First instalment due on the 23rd day of the 6th month of the accounting period
Minimum payment due is the lower of:
45% of the current accounting period liability, or
50% of the previous accounting period liability.

5. Pay and File for Corporation Tax
Preliminary tax for a large company
Second instalment on the 23rd day of the month prior to the final month of the accounting period (11th month of accounting period).
The payment due must bring total preliminary tax to at least 90% of the total estimated CT liability for the accounting period.

6. Pay and File for Corporation Tax
Corporation Tax Return
Must be filed by 23rd day of the ninth month after the accounting period end date.
Balancing payment due along with tax return
Late filing surcharge
5% of CT liability (to maximum of €12,695) when filed within two months of filing date
10% of CT liability (to maximum of €63,485) when filed after two months of filing date

7. Pay and File for Corporation Tax
Corporation Tax Return
Remember: Late filing also results in a restriction of loss relief:
Where the return is filed less than two months after the filing date, a 25% restriction applies to loss reliefs subject to a maximum restriction of €31,740
Where the return is filed more than two months after the filing date, a 50% restriction applies to loss reliefs subject to a maximum restriction of €158,720