The nanny tax calculation provided is for employer’s to establish the full cost including employer’s NIC.
MORE than one job or Nanny SHARE? You must first decide if you are one employer or individual employers. If you choose individual employers, you should provide the shared tax code value in other, based on your proportion of salary payment. Or one employer must select 1150L (full allowance), and other BR (no allowance) at 20% tax (or D0 tax code at 40%, see GROSS tax threshold bracket)
Please note that calculations are based on a month 1 basis (Non cumulative) and at the 20% tax threshold, are supplied for illustrative purposes only. We can only provide calculations, based on the salary & tax code you advise us below individually.