The Government’s manifesto pledge back in 2015 was that the personal allowance would rise to £12,500 in 2020 and the higher rate tax threshold to £50,000. However, the Chancellor has decided to bring forward these increases one year early from 2019/20, taking an estimated 1 million taxpayers out of higher rate tax.
Note that up to 10% of the personal allowance (£1,250 from 6 April 2019) may be transferred from one spouse or civil partner to the other if unused and the transferee is a basic rate taxpayer. As announced last year, this transfer is now available on behalf of deceased spouses and civil partners.