Glossary · Self-assessment
Form 11
The income tax return for the self-employed and other chargeable persons.
Form 11 covers all your income for the year, any capital gains, and your self-assessment of the tax due. It's due by 31 October of the next year, with a later date, usually in mid-November, if you both pay and file through ROS. For 2025 returns the ROS date is 18 November 2026.
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Related terms
Pay and file · ROS · Self-assessment · Form 12
Source: Revenue: Pay and file system
All terms · General information, not tax advice.