Boris Johnson’s proposed tax cut for 40 percent taxpayers may not be as generous for workers as it appears on face value, according to UK private client accountants.

The current point at which someone pays 40 percent tax is £50,000. Under Boris Johnson’s proposal, this threshold would increase to £80,000,

Nimesh Shah, a partner at Blick Rothenberg said: “Boris Johnson has referred to ‘fiscal drag’ as his rationale to increase the present threshold. He wouldn’t be far wrong – in 2009/10 (the last tax year of the Labour Government), a person would need to earn over £43,875 before they paid income tax at 4...