When to Register to file Self Assessments

You must register if, during the tax year, you meet any of the following:

• Self-employed with income over £1,000 after expenses.
• Untaxed income, including rental, dividends, or foreign earnings.
• Capital Gains Tax liability.
• Company directors not fully taxed through PAYE.

Registration Deadline

• 5 October after the tax year you became liable.

Practical Tips

• Register as early as possible to organise records and avoid fines.
• Keep documentation of all income and expenses.
• HMRC provides online calculators to check if registration is required.