NIM10016 - Aggregation of Earnings: Calculating NICs: Earnings periods: Mixed contracted-out and not contracted- out employments: Employee has no Appropriate Personal Pension (APP) arrangement
Regulation 6, SS(C)R 2001 (prior to 6th April 2016)
NICs are calculated based on the shortest earnings period for the contracted-out employment(s).
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.
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.