<P> Originally introduced as a classical tax system , in which companies were subject to tax on their profits and companies ' shareholders were also liable to income tax on the dividends that they received , the first major amendment to corporation tax saw it move to a dividend imputation system in 1973 , under which an individual receiving a dividend became entitled to an income tax credit representing the corporation tax already paid by the company paying the dividend . The classical system was reintroduced in 1999 , with the abolition of advance corporation tax and of repayable dividend tax credits . Another change saw the single main rate of tax split into three . Tax competition between jurisdictions reduced the main corporate tax rate from 28 % in 2008 - 2010 to a flat rate of 20 % as of April 2015 . </P>
what is the corporate tax rate in great britain
20 %