Company tax rates are as follows:

Rates for Corporation Tax years starting 1 April

Rate 2020 2019 2018 2017 2016 2015 2014
Small profits rate
(companies with profits under £300,000)
20%
Main rate
(companies with profits over £300,000)
21%
Main rate (all profits except ring fence profits) 19% 19% 19% 19% 20% 20%
Marginal Relief lower limit £300,000
Marginal Relief upper limit £1,500,000
Standard fraction 1/400
Special rate for unit trusts and open-ended
investment companies
20% 20% 20% 20% 20% 20% 20%