HMRC Urges Late Taxpayers To Act Promptly Online

HMRC Urges Late Taxpayers To Act Promptly Online
Charlotte Baroukh

Charlotte Baroukh

Tax Expert @ Pie

3 min read

Updated: 11 Feb 2026

3 min read

Updated: 11 Feb 2026

HM Revenue & Customs (HMRC) has issued a renewed appeal for individuals who missed the Self Assessment tax return deadline, advising them to submit returns online as soon as possible.


The call to action comes as many people across the country balance work and personal finances while dealing with outstanding tax obligations. The warning highlights the risk of escalating financial penalties for those who have not yet fulfilled their tax responsibilities this year.

HMRC Issues Urgent Reminder

HMRC recently took to social media to remind individuals behind on their Self Assessment returns that immediate action is necessary, but that telephone contact is not required in most cases.


Instead, taxpayers are being directed to the online filing system to settle any outstanding liabilities efficiently. The message underlines the ease and accessibility of the digital service, encouraging prompt compliance over calls to customer support.

Filing Requirements and Online Access

The online Self Assessment service allows eligible users including the self-employed and those with income from property or other sources to file returns, review previous submissions, check amounts owed, and print detailed tax calculations.


First-time filers must register for Self Assessment before using the online platform, while existing users should verify their account status to avoid delays in processing.

Who Cannot Use the Online Service

Certain categories of taxpayers are unable to use HMRC’s standard online Self Assessment system. These include partnerships, trusts, estates, non-resident taxpayers, and individuals with specific tax circumstances.


In these situations, commercial tax software or paper forms must be used for submissions. HMRC reminds all filers to choose the correct method based on their financial situation to ensure compliance.

Key Documents and Set-Up

To file online, taxpayers require their Unique Taxpayer Reference (UTR) and must sign in to the government website. For security purposes,


HMRC may also request identification such as a passport or driving licence to confirm the user’s identity. The online system offers paperless notifications for those who opt in, promoting efficiency and helping filers stay informed about updates and deadlines.

Penalties for Late Filing

Missing the Self Assessment deadline triggers automatic penalties. An initial fixed penalty of £100 applies immediately after the deadline, regardless of whether tax is owed. For returns outstanding by three months, daily penalties of £10 up to a maximum of £900 are imposed.


At six months late, an additional penalty equal to 5% of the tax owed is added. If the delay extends to twelve months, a further 5% penalty is charged, with possible extra penalties in cases where HMRC finds the delay to be deliberate or careless.

Final Summary

HMRC’s latest warning serves as a clear reminder of the importance of meeting Self Assessment deadlines and the financial consequences of delays. The tax authority emphasises use of its online services for efficient compliance and resolution of outstanding returns.


Individuals concerned about their specific situation are advised to act quickly to avoid increased penalties and interest. For those seeking help managing tax obligations, the Pie app provides resources for tracking returns and deadlines.

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