20/12/2025
Trading Allowance – When Do You Still Need to File a Self Assessment?
If you earn extra income on the side, this is important 👇
The UK trading allowance allows you to earn up to £1,000 per tax year from self-employment or casual trading tax-free.
However, you still need to file a Self Assessment tax return if:
• Your gross trading income exceeds £1,000 (before expenses)
• You are already registered for Self Assessment (for any reason)
• You choose to claim actual business expenses instead of the allowance
• HMRC has issued you with a notice to file
• Your income affects benefits or entitlements, such as:
– Maternity Allowance
– Tax Credits
– Universal Credit
– Child Benefit (High Income Charge)
You may still need to declare income even if no tax is due, as HMRC use this information to assess benefits and entitlements.
You generally do NOT need to file if:
• Your total trading income is £1,000 or less
• You are not otherwise required to submit a Self Assessment
• Your income does not impact benefits or other HMRC calculations
⚠️ Important reminders:
• The £1,000 limit is based on income, not profit
• Benefits are often assessed on earnings, not tax payable
If you are unsure whether you need to file, do not guess.
✔️ Review your total income
✔️ Check how it affects benefits or maternity pay
✔️ Speak to HMRC or a qualified accountant
👉 Save this post, share it with anyone running a side hustle, and comment or message if you would like help checking your position.