- Latest available (Revised)
- Original (As enacted)
Income and Corporation Taxes Act 1988, Section 12 is up to date with all changes known to be in force on or before 29 November 2024. There are changes that may be brought into force at a future date. Changes that have been made appear in the content and are referenced with annotations.
Revised legislation carried on this site may not be fully up to date. Changes and effects are recorded by our editorial team in lists which can be found in the ‘Changes to Legislation’ area. Where those effects have yet to be applied to the text of the legislation by the editorial team they are also listed alongside the legislation in the affected provisions. Use the ‘more’ link to open the changes and effects relevant to the provision you are viewing.
(1)F1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
(2)F1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
(3)F1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
(4)F1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
(5)F1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
[F2(5A)F1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .]
[F3(5B)F4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .]
(6)F1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
(7)F1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
[F5(7ZA)F1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .]
[F6(7A)F7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .]
F9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
F10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .]
[F11[F12(7C)F7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .]]
(8)Where it appears to the inspector that the beginning or end of any accounting period of a company is uncertain, he may make an assessment on the company for such period, not exceeding 12 months, as appears to him appropriate, and that period shall be treated for all purposes as an accounting period of the company unless either—
(a)the inspector on further facts coming to his knowledge sees fit to revise it; or
(b)on an appeal against the assessment in respect of some other matter the company shows the true accounting periods;
and if on an appeal against an assessment made by virtue of this subsection the company shows the true accounting periods, the assessment appealed against shall, as regards the period to which it relates, have effect as an assessment or assessments for the true accounting periods, and there may be made such other assessments for any such periods or any of them as might have been made at the time when the assessment appealed against was made.
[F13(9)F14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .]
Textual Amendments
F1S. 12(1)-(7ZA) repealed (1.4.2009 with effect in accordance with s. 1329(1) of the repealing Act) by Corporation Tax Act 2009 (c. 4), Sch. 1 para. 7, Sch. 3 Pt. 1 (with Sch. 2 Pts. 1, 2)
F2S. 12(5A) inserted (with effect as mentioned in Sch. 4 para. 11(4) of the amending Act) by Finance Act 1996 (c. 8), s. 79, Sch. 24 para. 11(3)
F3S. 12(5B) inserted (with effect in accordance with Sch. 41 para. 5(1) of the amending Act) by Finance Act 2003 (c. 14), Sch. 41 para. 1(3)
F4S. 12(1)-(7ZA) repealed (with effect in accordance with s. 1329(1) of the repealing Act) by Corporation Tax Act 2009 (c. 4), Sch. 1 para. 7, Sch. 3 Pt. 1 (with Sch. 2 Pt. 12)
F5S. 12(7ZA) inserted (with effect in accordance with Sch. 41 para. 5(1) of the amending Act) by Finance Act 2003 (c. 14), Sch. 41 para. 1(5)
F6S. 12(7A) inserted by Finance Act 1990 (c. 29), s.48, Sch.9 para.3 (in relation to transfers of business on or after 1.11.1990)
F7S. 12(7A)(7C) omitted (19.2.2008 with effect in accordance with art. 1(2) of the repealing S.I.) by virtue of The Insurance Business Transfer Schemes (Amendment of the Corporation Tax Acts) Order 2008 (S.I. 2008/381), arts. 1(1), 3
F8S. 12(7B) inserted (with effect in accordance with art. 14(4) of the amending S.I.) by The Financial Services and Markets Act 2000 (Consequential Amendments) (Taxes) Order 2001 (S.I. 2001/3629), art. 14(3)
F9S. 12(7B): words and definition of "contracts of long-term insurance" repealed (with effect in accordance with Sch. 10 para. 17(2) of the repealing Act) by Finance Act 2007 (c. 11), Sch. 10 para. 14(2)(a), Sch. 27 Pt. 2(10), Note
F10S. 12(7B): definition of "insurance business transfer scheme" repealed (with effect in accordance with Sch. 9 para. 17(1) of the repealing Act) by Finance Act 2007 (c. 11), Sch. 9 para. 1(2)(a), Sch. 27 Pt. 2(9), Note
F11S. 12(7C) inserted (with effect in accordance with Sch. 9 para. 20(7) of the amending Act) by Finance (No. 2) Act 2005 (c. 22), Sch. 9 para. 20(3)
F12S. 12(7C) substituted (with effect in accordance with Sch. 9 para. 17(1) of the amending Act) by Finance Act 2007 (c. 11), Sch. 9 para. 3(2)
F13S. 12(9) inserted (with effect in accordance with Sch. 10 para. 2 of the amending Act) by Finance Act 2006 (c. 25), Sch. 10 para. 43(2)
F14S. 12(9) repealed (1.4.2009 with effect in accordance with s. 1329(1) of the repealing Act) by Corporation Tax Act 2009 (c. 4), Sch. 1 para. 7, Sch. 3 Pt. 1 (with Sch. 2 Pts. 1, 2)
The Whole Act you have selected contains over 200 provisions and might take some time to download. You may also experience some issues with your browser, such as an alert box that a script is taking a long time to run.
Would you like to continue?
The Whole Act you have selected contains over 200 provisions and might take some time to download.
Would you like to continue?
The Whole Act without Schedules you have selected contains over 200 provisions and might take some time to download. You may also experience some issues with your browser, such as an alert box that a script is taking a long time to run.
Would you like to continue?
The Whole Act without Schedules you have selected contains over 200 provisions and might take some time to download.
Would you like to continue?
The Whole Act you have selected contains over 200 provisions and might take some time to download. You may also experience some issues with your browser, such as an alert box that a script is taking a long time to run.
Would you like to continue?
The Whole Act without Schedules you have selected contains over 200 provisions and might take some time to download. You may also experience some issues with your browser, such as an alert box that a script is taking a long time to run.
Would you like to continue?
The Schedules you have selected contains over 200 provisions and might take some time to download. You may also experience some issues with your browser, such as an alert box that a script is taking a long time to run.
Would you like to continue?
Latest Available (revised):The latest available updated version of the legislation incorporating changes made by subsequent legislation and applied by our editorial team. Changes we have not yet applied to the text, can be found in the ‘Changes to Legislation’ area.
Original (As Enacted or Made): The original version of the legislation as it stood when it was enacted or made. No changes have been applied to the text.
Geographical Extent: Indicates the geographical area that this provision applies to. For further information see ‘Frequently Asked Questions’.
Show Timeline of Changes: See how this legislation has or could change over time. Turning this feature on will show extra navigation options to go to these specific points in time. Return to the latest available version by using the controls above in the What Version box.
Access essential accompanying documents and information for this legislation item from this tab. Dependent on the legislation item being viewed this may include:
This timeline shows the different points in time where a change occurred. The dates will coincide with the earliest date on which the change (e.g an insertion, a repeal or a substitution) that was applied came into force. The first date in the timeline will usually be the earliest date when the provision came into force. In some cases the first date is 01/02/1991 (or for Northern Ireland legislation 01/01/2006). This date is our basedate. No versions before this date are available. For further information see the Editorial Practice Guide and Glossary under Help.
Use this menu to access essential accompanying documents and information for this legislation item. Dependent on the legislation item being viewed this may include:
Click 'View More' or select 'More Resources' tab for additional information including: