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HMRC internal manual

Compliance Handbook

Assessing Time Limits: The Time Limits: Insurance Premium Tax, Aggregates Levy, Climate Change Levy and Landfill Tax Limitations: Tax assessments

An assessment to tax for these taxes, made more than 2 years after

  • the end of the accounting period for aggregates levy or climate change levy, or
  • the relevant event for insurance premium tax or landfill tax

must be made within 12 months of the date when evidence of the facts that justify making the assessment comes to our knowledge.

However, this 12 months evidence of facts time limit is not separate and distinct from the other applicable time limits, see CH51300. You have 12 months from the discovery of the evidence giving rise to the assessment to make that assessment, subject to the other time limits. The evidence of facts rule is a limitation of the other applicable time limits.