CG17370 | Indexation: from 6/4/88: assets derived from other assets
From HM Revenue & Customs · Capital Gains Manual
Where
assets have been merged or divided or have changed their nature or
rights or interest over assets have been created or extinguished and therefore
the value of an asset [A]
is in any way derived from another asset [B]
which the taxpayer owns or has owned,
TCGA92/S43, see CG15200, provides that an appropriate proportion of the sums allowable on the disposal of asset B under TCGA92/S38 (1)(a) and (b) shall be attributed to asset A.
If expenditure incurred on asset B, but attributed to asset A, falls within TCGA92/S38(1)(a), for indexation purposes it is treated as incurred when asset A was acquired.
See example in CG17484.
Where a LEASEHOLDER OF LAND acquires a superior interest in the same land he may be able to claim the benefit of the concessional treatment described in CG71400+, so that indexation in respect of expenditure actually on asset B, but attributed to asset A, runs from the date of expenditure. This does not apply to other assets.