Summary
This article will direct you to HMRC for how to work out National Insurance contributions if your employee has more than 1 job.
Description
NOTE: Aggregating earnings isn't possible in Sage 50 PayrollIf your employee has more than 1 job with you may have to calculate National Insurance contributions (NICs) based on the earnings of both of their jobs.
Please contact HMRC for more information or see more on HMRC Here>