The personal allowance for 2018/19 is £11,850. However, some individuals do not benefit from the full personal allowance. There is a reduction in the personal allowance for those with ‘adjusted net income’ over £100,000, which is £1 for every £2 of income above £100,000. So for 2018/19 there is no personal allowance where adjusted net income exceeds £123,700.
The basic rate of tax is currently 20%. From 6 April 2018 the band of income taxable at this rate is £34,500 so that the threshold at which the 40% band applies is £46,350 for those who are entitled to the full personal allowance. Additional rate taxpayers pay tax at 45% on their income in excess of £150,000.
In 2017/18 the first £5,000 of dividends are chargeable to tax at 0% (the Dividend Allowance). From 6 April 2018 the Dividend Allowance is reduced to £2,000.