ERSM160835 | Ascertaining Foreign Securities Income (FSI) - up to 5 April 2015: non-domiciled/not s26A employees with associated employments - detail
From HM Revenue & Customs · Employment Related Securities Manual
The basic rule is that for a tax year to which ITEPA03/S41C(3) & (4) apply any securities income will be treated as FSI and will therefore be taxable only on remittance to the UK. ITEPA03/S41D, where it applies, modifies this basic rule.
It does this by taking the amount of FSI determined under section 41C, and subjecting this to a just and reasonable test. The factors to be taken into account in applying this test are as follows:
the employment income for the period from all the employments mentioned in section 41D(1)(a) (this means the employment to which section 41C(4) applies, and any associated employments),
the proportion of that income that is general earnings to which ITEPA03/S22 applies (chargeable overseas earnings),
the nature of and time devoted to the duties performed outside the UK, and those performed in the UK, in the period, and
all other relevant circumstances
Only the amount of securities income which it is just and reasonable to regard as foreign, having applied this wide-ranging test, is then treated as FSI.