by mullet on Sun Jan 15, 2012 8:54 pm
If you pay tax at the basic rate
You have no tax to pay on your dividend income because the tax liability is 10 per cent - the same amount as the tax credit - as shown in the earlier tables.
If you pay tax at the higher rate
You pay a total of 32.5 per cent tax on dividend income inclusive of tax credit where this falls above the basic rate Income Tax limit (£35,000 for the 2011-12 tax year). In practice, however, you owe only 25 per cent of the dividend paid to you after the tax credit has been taken into account.
If you pay tax at the additional rate
From the 2010-11 tax year you pay a total of 42.5 per cent tax on dividend income that exceeds the higher rate Income Tax limit (currently £150,000). But because the first 10 per cent of the tax due on your dividend income is already covered by the tax credit, in practice you owe only 36.1 per cent of the dividend paid to you.
Note that dividend income, like savings income, is taxed after your non-savings income - for example, wages and self-employment profit - at your highest tax rate. For example, if it falls both sides of the £35,000 basic rate tax limit, it will be taxed partly at 10 per cent (and covered by the tax credit) and partly at 32.5 per cent (less the 10 per cent tax credit).
Source - http://www.hmrc.gov.uk/taxon/uk.htm#4