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HMRC Warns UK Taxpayers: Self Assessment Deadline Nears Fast

Wednesday, December 17, 2025 hmrc selfassessment taxdeadline taxreturn penalties taxes2026 taxcompliance uniquetaxpayerreference taxpayment uktax

HM Revenue and Customs (HMRC) has issued a crucial reminder to millions of UK taxpayers that the deadline for filing and paying their Self Assessment tax returns is swiftly approaching. All individuals required to submit an online Self Assessment return for the 2024/25 tax year must ensure their tax payments are made by 11.59pm on January 31, 2026. Those new to the Self Assessment system should obtain their Unique Taxpayer Reference (UTR) in good time to avoid complications when submitting their returns.