The super-deduction is ending on 31 March 2023. This temporary measure gives companies an enhanced deduction for capital expenditure on “main rate” capital equipment, e.g. plant and machinery.  A key feature of the super-deduction is that it is not subject to an upper limit. Unincorporated businesses are restricted in what capital expenditure they can write off in year one by the annual investment allowance (AIA). In order to avoid a cliff edge, the government has announced that from 1 April 2023 to 31 March 2026, companies will be able to claim a 100% first-year allowance for main rate items, with no upper limit. As the main rate of corporation tax is increasing to 25% from 1 April, this three-year period will be a good time to incur any significant expenditure that might otherwise be restricted, e.g. if companies are subject to the AIA after 31 March 2026.

As an additional measure, the 50% first-year allowance for “special rate” items will continue for the same three-year period.

More information can be found in the policy paper.