Corporation tax rates

2023/24
2022/23
  • Corporation tax rates are set for each Financial Year. A Financial Year runs from 1 April to the following 31 March.
  • If the accounting period of a company straddles the 31 March, the profits are apportioned on a time basis to each Financial Year.
  • The Northern Ireland Executive has committed to setting the rate of corporation tax at 12.5% when the Northern Ireland Executive demonstrates its finances are on a sustainable footing.

Year to 31.3.24

Profits band £

Rate %

Small profits rate

0 - 50,000

19

Marginal rate

50,001 - 250,000

26.5

Main rate

Over 250,000

25

Marginal relief fraction

3/200

For the year to 31.3.23 the main rate of corporation tax was 19%. Special rules apply to accounting periods straddling 1 April 2023. For the year to 31.3.24 the profits limits are reduced for a company with associated companies. Different rates apply for ring-fenced (broadly oil industry) profit.

  • Corporation tax rates are set for each Financial Year. A Financial Year runs from 1 April to the following 31 March.
  • If the accounting period of a company straddles the 31 March, the profits are apportioned on a time basis to each Financial Year.
  • The Northern Ireland Executive has committed to setting the rate of corporation tax at 12.5% when the Northern Ireland Executive demonstrates its finances are on a sustainable footing.
Year to 31.3.23 Rate %
All profits 19