Nitpick: Upper marginal employee NI rate is 2%, not 1%. So the high income marginal tax rate (and maximum average tax rate) is 47%, not 46%. Nitpick 2: The emp

Nitpick: Upper marginal employee NI rate is 2%, not 1%. So the high income marginal tax rate (and maximum average tax rate) is 47%, not 46%. Nitpick 2: The employer also pays 13.7% NI on top of that million-pound salary, so the actual tax wedge on the employer's £1.137m outlay is 52.4% (and would approach 53.4% at multi-million salary levels).