Super-deduction calculator UK

Please note: this scheme has now expired and has been replaced by full expensing.

Use our super-deduction calculator to see how much you could have saved under the UK Government’s scheme, with tax savings of up to 130% on certain plant & machinery.

Page written by Ian Hawkins. Last reviewed on May 14, 2025. Next review due April 6, 2026.

Tax savings calculator

Your business could cut taxes by benefiting from significant capital allowance measures on qualifying plant and machinery.

The super-deduction – 130% first-year relief
The 50% first-year allowance
Annual Investment Allowance (AIA) providing 100% relief

From 1 April 2021 to 31 March 2023, companies can claim 130% capital allowances on plant and machinery investments that would usually qualify for 18% tax relief. For example, a company investing £100,000 could claim a deduction of £130,000 against taxable profits, saving up to 19% of that – or £24,700 on its corporation tax bill

This is a special rate first year allowance (FYA) for plant and machinery which covers new plant and machinery that would usually qualify for the special rate of 6% tax relief, including integral features in a building and long life assets.

The annual investment allowance (AIA) lets a business deduct 100% of the cost of qualifying plant and machinery assets from their taxable profit, in the tax year of purchase. It means a business can save £1 in taxable profits for every £1 spent, up to a maximum of £1m per tax year.