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Official guidance
Company Taxation Manual

CTM18000 · Shadow ACT to 31 March 2026

  • CTM18200 · Shadow ACT: set-off of ACT: accounting periods ending on or before 5 April 1999
  • CTM18210 · Shadow ACT: set-off of ACT: accounting periods beginning before and ending after 5 April 1999
  • CTM18220 · Shadow ACT: set-off of ACT: accounting periods beginning on or after 6 April 1999
  • CTM18230 · Shadow ACT: unrelieved surplus ACT
  • CTM18250 · Shadow ACT: outline of the scheme
  • CTM18260 · Shadow ACT: companies to which the regulations apply
  • CTM18300 · Shadow ACT: definition of a group
  • CTM18320 · Shadow ACT: definition of parent and subsidiary companies
  • CTM18350 · Shadow ACT: definition of a group: additional tests for 51% subsidiaries
  • CTM18360 · Shadow ACT: definition of a group: additional tests for parent companies
  • CTM18370 · Shadow ACT: definition of a group: arrangements
  • CTM18400 · Shadow ACT: accounting periods to which the Regulations apply: company not a member of a group: immediate opt out
  • CTM18420 · Shadow ACT: accounting periods to which the Regulations apply: company not a member of a group: no immediate opt out
  • CTM18430 · Shadow ACT: accounting periods to which the Regulations apply: company not a member of a group: unrelieved surplus ACT available for set off exhausted
  • CTM18450 · Shadow ACT: accounting periods to which the Regulations apply: company not a member of a group: later opt out
  • CTM18470 · Shadow ACT: accounting periods to which the Regulations apply: group members
  • CTM18480 · Shadow ACT: accounting periods to which the Regulations apply: group members: immediate opt out
  • CTM18500 · Shadow ACT: accounting periods to which the Regulations apply: group members: unrelieved surplus ACT available for set off exhausted
  • CTM18510 · Shadow ACT: accounting periods to which the Regulations apply: group members: later opt out
  • CTM18550 · Shadow ACT: computation of: introduction
  • CTM18570 · Shadow ACT: computation of: subsidiary with election under Regulation 11(3)
  • CTM18580 · Shadow ACT: computation of: surplus franked investment income
  • CTM18590 · Shadow ACT: computation of: distributions outside an accounting period
  • CTM18600 · Shadow ACT: computation of: company ceasing to be a member of a group
  • CTM18650 · Shadow ACT: utilisation of: overview
  • CTM18670 · Shadow ACT: utilisation of: Double Taxation Relief
  • CTM18680 · Shadow ACT: utilisation of: carry back
  • CTM18700 · Shadow ACT: utilisation of: allocation of surplus within groups
  • CTM18710 · Shadow ACT: utilisation of: companies leaving and joining a group
  • CTM18720 · Shadow ACT: unrelieved surplus: set-off
  • CTM18730 · Shadow ACT: unrelieved surplus: restriction on set- off of arising as the result of a surrender
  • CTM18750 · Shadow ACT: unrelieved surplus: ACT buying
  • CTM18760 · Shadow ACT: unrelieved surplus: change of ownership of company
  • CTM18770 · Shadow ACT: unrelieved surplus: asset transferred after change in ownership of company
  • CTM18800 · Shadow ACT: unrelieved surplus: recovery of ACT wrongly set off
  • CTM18810 · Shadow ACT: unrelieved surplus: displacement of
  • CTM18850 · Shadow ACT: controlled foreign companies liabilities
  1. Shadow ACT to 31 March 2026: contents
  2. Shadow ACT: computation of: introduction

CTM18550 | Shadow ACT: computation of: introduction

From HM Revenue & Customs · Company Taxation Manual

SI1999/358 reg 3 (1), reg 7, reg 8, reg 9, reg 10, reg 11 (1) and (2)

Shadow ACT arises when the franked distributions made by the company in the accounting period (AP) exceed the aggregate of:

  • nine-eighths of its franked investment income, and

  • the amount of any surplus franked investment income brought forward from the previous AP.

The rate is 25 per cent on an amount which, when the shadow ACT is added to it, is equal to the excess.

'Franked distributions are the amount or value of a relevant distribution and such proportion of that amount or value as corresponds to the rate of shadow ACT.

'Relevant distributions' means any, not just a qualifying, distribution made on or after 6 April 1999 excluding

  • manufactured dividends,

  • intra group distributions other than those that the company has elected should not be excluded.

'Franked investment income' means a distribution in respect of which the company is entitled to a tax credit and is the aggregate of the amount or value of the distribution and the credit except that it does not include

  • income which was interest or which replaces interest as a result of action, the main purpose of which was to reduce the amount of shadow ACT,

  • income which accrued as a consequence of arrangements to pass on the value of franked investment income,

  • a distribution or payment which is to be taken into account in computing the profits of a dealer chargeable under trading income,

  • intra group distributions except those to which an election under reg11 (3) applies,

  • distributions received from a company that is not a member of the same group at that time but arrangements in place at the time are such as to give a reasonable expectation that the company will join or rejoin the group, or

  • distributions received from a company that is no longer a member of the group where the distributions are made by reference to the shareholdings at a time when the two companies were members of the same group.

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