QE Tax Flash: Late Tax Filings Get Costly

UK corporation tax filing obligations become stricter this year, with the UK tax authority doubling penalties for late filings from 1 April 2026. A Corporation Tax return filed one day late now costs £200 (up from £100); three months late, £400; and three consecutive late returns, £1,000. This is the first increase since these penalties were introduced in 1998. HMRC estimates the revised regime will generate around £60 million per year, indicating that late filing is currently widespread. 

The penalties apply to all UK companies and foreign companies with a UK permanent establishment who are required to file a return, even where there is no tax liability. For international groups with UK subsidiaries or permanent establishments, the exposure across multiple entities can accumulate quickly. 

Liesl Fichardt: "The penalty increases are part of a wider crackdown by HMRC on non-compliance and investment in enforcement tools. Businesses that inadvertently miss filing deadlines or fail to comply with other tax obligations should be proactive in rectifying and explaining their position to avoid enquiries." 

Emily Au: "HMRC's tolerance of late, incomplete or unexplained non-compliance is lowering, even where no tax is at stake."

Julius Berling: “Compliance calendars that worked in the recent past may not be adequate in 2026 and, with the first penalty increase in a generation, the cost of getting that wrong may no longer be negligible.”

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