What is the late filing surcharge in Ireland?

Ireland's self-assessed taxpayers who file their Form 11 after the due date face a surcharge on the income tax due for that year. The surcharge is separate from and in addition to interest on late payments.

If the return is filed within two months of the deadline, the surcharge is 5% of the tax due for the year, capped at €12,695. If the return is filed more than two months after the deadline, the surcharge is 10% of the tax due, capped at €63,485.

The surcharge is calculated on the income tax liability for the year, not on any outstanding balance. If you paid your preliminary tax on time but filed late, the surcharge still applies to the full year's tax charge. The cap means very high earners face a maximum surcharge rather than an uncapped percentage.

Interest on late payment of the preliminary tax or balance due runs at 0.0219% per day from the due date. The surcharge and interest are in addition to the tax itself. Revenue may waive or reduce surcharges in exceptional circumstances, but this requires a formal request.