The Budget announced that from 6 April 2019 (a year earlier than planned) the personal allowance will rise from £11,800 to £12,500 and the higher rate income tax threshold will increase from £46,350 to £50,000.
For the 2020/21 tax year, these thresholds are scheduled to remain at those levels. The thresholds will rise thereafter in line with consumer price inflation.
The change to the higher rate threshold will not apply in Scotland (apart from in relation to savings and dividend income), unless the Scottish Parliament alters policy.