the BBC Web site. The majority of people making use of the non-domiciled tax exemption are wealthy individuals with substantial income from outside of the United Kingdom. Typical non-domiciled UK residents include senior company executives, bankers, lawyers, business owners and international recording artists; see list of people with non-domiciled status in the UK. The tax year The tax year is sometimes also called the "fiscal year". A company's accounting year, which has some relevance for corporation tax purposes, can be chosen by the company and often runs from 1 April to 31 March, in line with the fiscal year. The British personal tax year runs from 6 to 5 April in the following year. Personal taxes Income tax Income tax is the single largest source of government revenue in the United Kingdom, making up about 30 percent of the total, followed by National Insurance contributions at around 20 percent. More than 25% of all income tax revenue is paid by the top 1% of taxpayers, i.e. taxpayers with the highest incomes, and 90% of all income tax revenue is paid by the top 50% of taxpayers with the highest incomes. The Scottish Parliament has full control over income tax rates and thresholds on all non-savings and non-dividend income liable for tax by taxpayers resident in Scotland. The Welsh Parliament also has some powers over income tax in Wales, but they have not been used. Each person has an income tax personal allowance, and income up to this amount in each tax year is free of tax. Until the 2027/28 tax year, the tax-free allowance for under-65s with income less than £100,000 is £12,570. Any income above the personal allowance is taxed using a number of bands: Taxpayer's income is assessed for tax according to a prescribed order, with income from employment using up the personal allowance and being taxed first, followed by savings income (from interest or otherwise unearned) and then dividends. Foreign income of United Kingdom residents is taxed as United Kingdom income, but to prevent double taxation the United Kingdom has agreements with many countries to allow offset against United Kingdom tax what is deemed paid abroad. These deemed amounts paid abroad are not necessarily as much as actually paid. Rental income on a property investment business (such as a buy to let property) is taxed as other savings income, after allowing deductions including mortgage interest. The mortgage