The impact of the changes so far
The April 2017 policy reforms and Brexit created concerns that the wealthy would be deterred from living in the UK and that we’d see a significant decrease in non-doms here and, indeed, there was a notable downward trend in the number of non-doms living in the UK (dropping from 65,300 in 2017/18 to 54,300 in 2020/21). However, this trend has now ceased as the 2021/22 tax year saw a slight increase in the overall number of non-domiciled taxpayers living in the UK, up to 55,200.
HMRC estimates that non-doms/deemed domicile’s combined tax and National Insurance Contribution (NIC) liabilities totalled around £12.4billion for the tax year ending 2022 - the largest liability since figures began (2008). Further details on the HMRC report can be found here.