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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: utilisation of: allocation of surplus within groups

CTM18700 | Shadow ACT: utilisation of: allocation of surplus within groups

From HM Revenue & Customs · Company Taxation Manual

SI1999/358 reg13

ICTA88/S240 dealing with the old ACT system left the parent company to choose whether to surrender ACT to a subsidiary. If that approach had been followed for shadow ACT, groups could have been expected to make distributions out of group members with no unrelieved surplus ACT. Those with unrelieved surplus ACT would have able to make full use of their capacity and reduce the surplus at a much faster rate than expected.

Reg13, therefore, obliges the parent company to allocate any surplus shadow ACT to another member or other members of the group up to the limit of their capacity.

Where the surplus is insufficient to exhaust the capacity of all the potential recipients, the parent company determines the recipient companies and the amount allocated to each.

Where the amount available exceeds the amount that can be utilised by all the potential recipients, the parent company must allocate to each an amount equal to its capacity.

Where there is more than one company in the group with surplus shadow ACT, the parent company decides the order in which the amounts allocated to a company are to be set-off and that order has to be followed on any subsequent reallocation. The effect is that, if the amount available exceeds the group's capacity, the parent company determines which company or companies will carry forward a surplus.

A company could be a member of more than one group with members with surplus shadow ACT. The amount that can be allocated to the company by the parent companies cannot exceed its capacity. In determining the maximum amount that can be allocated, the allocations are to be considered in the order in which they are made.

A group member's capacity for each accounting period (AP) is determined in the normal way. The maximum amount that can be allocated to it is that amount less its own shadow ACT to be set against its liabilities for each of the relevant APs. This amount is reduced where those APs include the first or last AP in which the transferring and recipient companies were members of the same group. The capacity for that AP is proportionately reduced by reference to the part of the period during which the two companies were not members of the same group.

The relevant APs are those during which the transferring and recipient companies were members of the same group, and which are one of the following:

  • an AP beginning and ending on the same dates, or contained within, the AP of the transferring company,

  • an AP beginning before, but ending in, the transferring company's AP,

  • an AP beginning in, but ending after, the transferring company's AP, and

  • any further period (whether the whole or part of an AP) beginning twenty four months or lessv before the end of the transferring company's AP.

The allocation must follow that order.

Any remaining surplus is allocated to any other group member or set-off against any controlled foreign companies liability of the company or another group member. Any amount that cannot be used in any of those ways remains with the company that generated it. It is car ried forward and treated as if it were shadow ACT paid in the next AP.

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