In his first Budget on 8th March the new Chancellor Phillip Hammond announced that he would level the playing field between employees and the self-employed by increasing Class 4 National Insurance Contributions (NICs) from 9% to 10% from 6 April 2018 and then to 11% from 6 April 2019. His justification is that the self-employed are now entitled to more generous state benefits than in the past and thus NIC rate should be increased towards the 12% Class 1 NIC employee rate. Note that the flat rate Class 2 NIC contributions, currently £2.80 a week, cease on 5 April 2018.
The chancellor stated that only the self-employed with profits in excess of £16,250 will pay more national insurance.