NICs are calculated based on the shortest earnings period for
the contracted-out employment(s).
Example 1
If a person has two jobs in which one is contracted-out with
a monthly earnings period and one is not contracted-out with a
weekly earnings period, the earnings period for NICs purposes is
monthly.
Example 2
If a person has three jobs in which two are contracted-out
with monthly and weekly earnings periods and the other is not
contracted-out with a two weekly earnings periods, the earnings
period for NICs purposes is weekly.
