| Financial Year End | £ | 31st March 09 | 31st March 08 |
| Small companies rate | 0-300,000 | 21% | 20% |
| Marginal rate | 300,001-1,500,000 | 29.75% | 32.50% |
| Standard rate | over 1,500,000 | 28% | 30% |
From 1 April 2008 the standard rate of corporation tax will decrease to 28% and the small companies rate will increase to 21% (22% w.e.f. 1.4.09).