HMRC
Self Assessment Tax Return
SA100 2024-25 | Tax year 6 April 2024 to 5 April 2025
Important Deadlines:
Paper return: 31 October 2025
|
Online return: 31 January 2026
|
Late filing penalty: £100 (+ £10/day after 3 months)
Welcome to your Self Assessment Tax Return
Select which supplementary pages you need to complete. We'll only show you the sections relevant to your circumstances.
Employment & Income
Tax Reliefs & Other Income
Filing online is recommended. 97% of people file online. It's quick, secure, and available 24/7. Visit
www.gov.uk/log-in-file-self-assessment-tax-return