CG13420 - Migration and exit charges: individuals
There is no specific legislation creating an occasion of charge for individuals ceasing to be resident. They are therefore not subject to an exit charge on emigration.
Even if they become both not resident and not ordinarily resident* they will remain within the charge to Capital Gains Tax until the following 5 April, see CG10970+ and CG25750. However they may be treated as outside the charge from the date of departure by concession or if split-year treatment applies, see CG10972+ and CG10978+.
* For 2013/14 and subsequent years under the Statutory Residence Test rules an individual is either resident or not resident in the UK for a year. Also ordinary residence does not need to be considered.