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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: carry back

CTM18680 | Shadow ACT: utilisation of: carry back

From HM Revenue & Customs · Company Taxation Manual

SI1999/358 reg12 (7), (8) and (9)

Where, in respect of any accounting period (AP), there is surplus shadow ACT, the amount is to be treated as if it were shadow ACT paid in respect of relevant distributions made by the company in any of its APs beginning on or after 6 April 1999 and in the six preceding years.

The surplus is to be set, so far as possible, against the liability for more recent before earlier APs. The amount allocated to each earlier AP is limited to the available capacity except that, for the period beginning 24 months before the end of the AP for which the shadow ACT is to be carried back, it can displace unrelieved surplus ACT set against the company's liability.

Example

A company has capacity for the AP 1.1.2010 – 31.12.2010 of £1,000.

During that period it makes a distribution of £32,000 generating shadow ACT of £8,000.

It has unused unrelieved surplus ACT of £20,000.

The position for the APs for the six previous years is

Accounting period endedCapacityShadow ACT unrelievedSurplus ACT
31.12 2009£1,000£1,000-
31.12.2008£1,000£500£500
31.12.2007£2,000£2,000-
31.12.2006£1,000£1,000-
31.12.2005£1,000£1,000-
31.12.2004£1,000£500£500

The shadow ACT is set first against the liability for the AP ended 31.12.2010 (£1,000).

A further £1,000 is carried back to the AP ended 31.12.2009, displacing the unrelieved surplus ACT and increasing the company’s liability for that period by £1,000. The balance of £6,000 is carried forward. It cannot displace the unrelieved surplus ACT set against earlier years.

Where the AP to which shadow ACT is to be carried back began before but ended during the period of 24 months, the amount of unrelieved surplus ACT falling to be displaced is proportionately reduced by reference to the part of the AP falling outside the period of 24 months.

Example

A company has capacity for the AP 1.1.2010 – 31.12.2010 of £1,000.

During that period it makes a distribution of £32,000 generating shadow ACT of £8,000.

It has unused unrelieved surplus ACT of £20,000.

The position for the APs for the six previous years is:

Accounting period endedCapacityShadow ACT unrelievedSurplus ACT
31.12 2009£1,000£1,000-
30.06.2009£1,000£500£500
30.06.2008£2,000£2,000-
30.06.2007£1,000£1,000-
30.06.2006£1,000£1,000-
30.06.2005£1,000£500£500

The shadow ACT is set first against the liability for the AP ended 31.12.2010 (£1,000).

A further £1,000 is carried back to the AP ended 31.12.2009, displacing the unrelieved surplus ACT and increasing the company’s liability for that period by £1,000.

A further £250 is carried back to the AP ended 30.06.2009 displacing the shadow ACT utilised in the part of that AP falling within the 24 month period referred to in reg12 (7).

This increases the company’s liability for that period by £250.

The balance of £5,750 is carried forward. It cannot displace the unrelieved surplus ACT set against earlier years.

Any remaining surplus is carried forward and treated as if it were shadow ACT paid in the next AP.

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