Income tax
As previously announced, Personal tax thresholds – ie personal allowance, basic and higher-rate thresholds for income tax remain frozen until April 2028 at the current level of £12,570 and £50,270. The additional rate threshold was reduced from £150,000 to £125,140 from 6 April 2023.
Personal allowance for higher rates from 2023/24
Where annual income exceeds £100,000, personal allowance is lost at a rate of £1 for every £2 of income above £100,000. This is the threshold where the entire personal allowance is lost.
The loss of the personal allowance means a person is taxed at 40% on the additional £2 of income, and they also pay an extra 40% on the £1 of personal allowance lost. This results in a marginal rate of 60%, which continues up to £125,140 (£100,000 + (£12,570 x 2)). At the £125,140 point the entire personal allowance is lost.
National insurance
The government will introduce legislation to reduce the main rate of primary Class 1 National Insurance contributions by 2 percentage points from 10% to 8% from 6 April 2024.
For the self-employed, the government will introduce legislation to reduce the main rate of Class 4 National Insurance contributions by 2 percentage points from 8% to 6% from 6 April 2024.
This is in addition to the previously announced reduction in the main rate of Class 4 National Insurance contributions from 9% to 8%, and means that from 6 April 2024 the main rate will reduce from 9% to 6%.
Capital gains tax: reduced annual exemption
As previously announced, the annual exemption amount for capital gains tax for individuals will reduce from £6,000 to £3,000 from April 2024.
The CGT rate for higher rate taxpayers on gains on disposals of residential properties will be reduced to 24% from April 2024.
Non-dom status to be replaced by new residence based system
The government will abolish the remittance basis of taxation for non-UK domiciled individuals and replace it with a simpler residence-based regime, which will take effect from 6 April 2025. The government has also announced an intention to move to a residence-based regime for inheritance tax, with plans to publish a policy consultation on these changes, followed by draft legislation for a technical legislation, later in the year.
High Income Child Benefit Charge threshold
The government will introduce legislation in the Spring Finance Bill 2024 to increase the High Income Child Benefit Charge (HICBC) adjusted net income starting threshold to £60,000, from the 2024-25 tax year onwards. It will also amend section 681C to extend the HICBC taper to between £60,000 and £80,000. For those with income between £60,000 and £80,000, the rate at which HICBC is charged is halved, and will equal 1% for every £200 of income that exceeds £60,000. The charge on taxpayers with income above £80,000 will be equal to the full amount of child benefit paid.
New British ISA investment allowance
The government has announced the introduction of the UK ISA. This will have a new ISA allowance of £5,000 in addition to the existing annual ISA allowance of £20,000 and will provide a new tax-free savings opportunity for people to invest in the UK. This will be introduced after a consultation which will run from 6 March 2024 to 6 June 2024.