"Missing either of them could leave households facing an instant £100 fine, with penalties spiralling to as much as £1,600 for serious delays. Andrea L Richards, accountant and chief executive of Accounts Navigator, has urged individuals to act swiftly to avoid unnecessary charges, highlighting the 5 October self-assessment registration deadline and the 31 October paper return deadline. Who needs to file? A tax return is required in a range of circumstances."
"This includes the self-employed who earned more than £1,000 in the past tax year, members of business partnerships, individuals liable for Capital Gains Tax, or those paying the High Income Child Benefit Charge outside PAYE. Others who may be caught by the rules include those receiving untaxed income such as rental earnings, tips, savings interest or income from overseas. 5 October deadline: Registering for self-assessment Anyone submitting a self-assessment for the first time must notify HMRC by 5 October 2025."
Two HMRC deadlines in October 2025 create immediate penalty risk for many taxpayers. First-time self-assessment filers must register with HMRC by 5 October 2025 to avoid an extended timetable and higher risk of penalties if returns are late. Paper tax returns must reach HMRC by 31 October 2025 or trigger an automatic £100 penalty, with additional fines and interest for prolonged delays. Returns are required for self-employed people earning over £1,000, business partners, those liable for Capital Gains Tax, High Income Child Benefit Charge payers outside PAYE, and anyone with untaxed income such as rent, tips, savings interest or overseas income. Filing online by 31 January 2026 does not prevent penalties calculated from the original due date, so timely registration and meeting the October deadlines is safer.
Read at Business Matters
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