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HMRC internal manual

Company Taxation Manual

Corporation Tax self-assessment (CTSA): capital allowances: CT Pay and File (CTPF) - time limit


A claim to capital allowances may be made or withdrawn up to the later of:

  • two years from the end of the accounting period concerned,
  • the date that a:
    • determination under TMA70/S41A, or
    • CT assessment

affected by the capital allowances claim becomes final, (whichever applies or is the later).

This is subject to an overall limit of six years from the end of the accounting period of claim (the ‘six year point’).

A company may try to extend the time limit by appealing against an assessment or determination made in agreed figures. It may do this to defer the date on which the relevant assessment or determination becomes final and conclusive, because it intends, later, to make a claim or further claim to capital allowances.

Note: You should consider listing such appeals for early determination by the Commissioners, unless the claim or further claim accompanies the appeal. The company can still claim capital allowances after the assessment or determination has become final and conclusive, if two years have not elapsed from the end of the relevant accounting period (see also AP3380).