What is the late filing surcharge?
If your return is not filed by the filing date (31 October in the following tax year), a surcharge is added to your tax liability – even if the tax was paid on time!
If your return is filed within two months of the filing date, the surcharge is 5% of the net tax liability, or €12,695, whichever is lower. If your return is filed more than two months after the filing date, the surcharge is 10% of the net tax liability, or €63,485, whichever is lower.