If you file your return late or pay your tax late, you may face interest charges and penalties from Revenue. Here’s what to expect:

1. Late Filing Surcharge 

If your Form 11 is not filed by the 31 October deadline (or the extended mid-November deadline via ROS), the following penalties may apply:

  • 5% of the total liability up to a maximum of €12,695 if the return is up to 2 months late.
  • 10% of the total liability up to a maximum of €63,485 if the return is more than 2 months late.

This penalty is in addition to any interest you owe on late tax payments. Revenue can also apply further penalties for persistent non-compliance or under-declaration.

2. Late Payment Interest

If you pay your tax late (including Preliminary Tax or the balance due for the year), Revenue will charge daily interest on the overdue amount.

  • The standard rate of interest is 0.0219% per day (about 8% per year).
  • Interest is calculated from the original due date (typically 31 October) until the tax is paid in full.

3. Impact on Refunds or Tax Clearance

Late filing or payment may:

  • Delay tax refunds
  • Affect your tax clearance status
  • Trigger Revenue enforcement actions or audits

How to Avoid Penalties

  • File and pay on time (using FastTax.ie)
  • Set reminders for the key deadlines.
  • If you can’t pay in full, contact Revenue as early as possible to arrange a payment plan.

Using FastTax.ie can help you to easily meet your file + pay obligations.