Starting January 2025, HMRC will impose fines of £100 on UK households that fail to meet the Self Assessment Tax Return deadline.
With just over a month remaining, taxpayers must act promptly to avoid penalties. The deadline for filing and paying taxes for the Tax Year 2023/24 tax year is midnight on 31 January 2025.
Consequences of Missing the Deadline
Failing to submit your Self Assessment Tax Return on time triggers an automatic £100 fine for delays of up to three months.
For longer delays or late payments, additional charges and interest will accrue. These penalties can quickly add up, increasing the financial burden.
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Who Needs to File a Tax Return?
You must complete a Self Assessment Tax Return if any of the following apply to you:
- Self-Employment - You earned more than £1,000 as a sole trader before tax relief.
- Business Partnerships - You were a partner in a business.
- High Income - Your total taxable income exceeded £150,000.
- Capital Gains - You sold or disposed of assets subject to Capital Gains Tax.
- Child Benefit Charge - You had to pay the High Income Child Benefit Charge.
If any of these categories describe your financial situation during the 2023/24 tax year, you are legally required to file a tax return.

Reasonable Excuses for Late Filing
HMRC allows appeals against penalties in cases where reasonable excuses prevented timely submission. Accepted reasons include:
- A close relative’s death shortly before the deadline
- Hospitalisation or life-threatening illness
- Technical failures, such as computer or software malfunctions
- Service disruptions with HMRC’s online platform
- Natural disasters like fires or floods
However, excuses such as bounced cheques, forgetting the deadline, or not receiving a reminder will not be accepted.
Key Tips to Avoid Penalties
- File Early - Submitting your tax return well before the deadline lowers stress and avoids last-minute technical issues.
- Double-check Details – Make sure all information is accurate to prevent delays.
- Seek Help if Needed - If you are unsure about the process, seek professional help like UK Property Accountants.
Conclusion
The fine shows that HMRC is serious about making sure people follow tax rules. Though £100 is a lot, it reminds everyone how important it is to file taxes on time to keep the system fair. Planning ahead can help avoid stress and extra costs.
With the 31 January deadline coming soon, taxpayers in the UK should take action now. Missing the deadline could mean instant fines and more financial problems later, so it is best to be prepared.
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