Compute NI given annual Earnings.
Employees pay contributions at 12%% on annual earnings between £9,568 and £50,270. Above that you pay at 2%%. Employers pay at 13.8%% on all annual earnings of more than £8,840, although there are different thresholds for those under the age of 21 and for apprentices under the age of 25.
fin_NI(annualEarnings, symbol = "£")
| annualEarnings | Employee annual earnings. | 
| symbol | Currency symbol to embed in the result. | 
NI
Other Miscellaneous Functions: 
deg2rad(),
fin_interest(),
fin_percent(),
fin_valuation(),
loadings.MxModel(),
rad2deg(),
umxBrownie()
fin_NI(42e3) fin_NI(142000)
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