How often do I need to send in a tax return?

If you’re self-employed, you must file a Form 11 tax return once a year.

• Due by 31 October of the year after the income was earned (or slightly later if using ROS).
• Example:
  • For 2025 income, file by 31 October 2026 or by 18th November 2026 if qualifying for ROS online extension, e.g. using FastTax.ie.

Filing late may lead to penalties and surcharges, so it’s important to stay on top of your deadlines.