Substantive duties are the duties that an employee has to carry
out and that represent all or part of the central duties of the
employment. The Courts have tended to take a restrictive approach
in defining the duties of the employment, see
EIM31650.
The case of Miners v Atkinson (68TC629) illustrates the
point, see
EIM32380. Mr Miners was the director of
his own “one man” service company. The work he did at
home is listed on page 632 in paragraph 11 of the stated case.
"Mr Miners did some work on his papers in the evenings at the flat during the week, most of his duties as director of WCLA [his service company]...were carried out at Flitwick [his home address]."
Although Mr Miners did some work at home the work he did was not part of the substantive duties of his employment. In these cases a distinction should be drawn between:
Only the second class of duties should be regarded as
substantive duties. If the work carried out at home all falls into
the first category no deduction should be permitted.
With other employments the central duties of the employment
should be accepted as substantive duties. In many cases it will be
possible to demonstrate that any work carried out at home is
preparatory and is not part of the duties of the employment at all,
see Example 1 at
EIM32790.
There is further advice about service companies at
EIM32800.