NIC

Yes - in practice Class1 NIC is computed on a monthly or weekly basis depending on the period for which the salary / wage is paid - with both weekly and monthly limits used - in our exam we just time apportion to the nearest month for an employee who has started or ended an employment during the tax year. For Class 4 NIC there is no time apportionment for a tax year in which a business may start or end, we simply apply the annual figures to whatever is the assessment for the tax year