2020/21
                                    
                                    
                                        2019/20
                                    
                                - The cost of purchasing capital equipment in a business is not a revenue tax deductible expense. However, tax relief is available on certain capital expenditure in the form of capital allowances.
 - Plant and machinery allowances may be available on items such as machines, equipment, furniture, certain fixtures in a building ('integral features'), computers, cars, vans and similar equipment used in a business.
 - There are special rules for cars and certain 'environmentally friendly' equipment.
 - Plant and machinery allowances may be available to owners of commercial property which is let out to a business.
 - The Annual Investment Allowance (AIA) gives a 100% write-off on most types of plant and machinery (but not cars) up to an annual limit.
 - Writing down allowances (WDA) are given for expenditure for which AIA is not, or cannot be, claimed.
 - A Structures and Buildings Allowance of 3% (2% prior to April 2020) may be available for qualifying investments to construct new, or renovate old, non-residential structures and buildings.
 
AIA
- Special rules apply to accounting periods straddling the dates shown in the tables below.
 - The AIA may need to be shared between certain businesses under common ownership.
 
AIA limits - companies
                                                            Expenditure incurred: | 
                                                        
                                                            Annual limit | 
                                                    
|---|---|
| £ | |
| From 1 January 2019 to 31 December 2020 | 1,000,000 | 
| From 1 January 2021 | 200,000 | 
AIA limits - sole traders and partnerships
                                                            Expenditure incurred: | 
                                                        
                                                            Annual limit | 
                                                    
|---|---|
| £ | |
| From 1 January 2019 to 31 December 2020 | 1,000,000 | 
| From 1 January 2021 | 200,000 | 
Other plant and machinery allowances
- Expenditure upon which AIA is not given/claimed will obtain relief through the 'main rate pool' or the 'special rate pool' rather than each item being dealt with separately.
 - The annual rate of WDA is 18% in the 'main rate pool' and 6% in the 'special rate pool'.
 - A 100% first year allowance (FYA) may be available on certain energy efficient plant and cars.
 
Cars
- For expenditure incurred on cars, costs are generally allocated to one of the two plant and machinery pools.
 - AIA is not available on any car but a 100% first year allowance may be available on certain cars. To qualify for first year allowance, the car must be purchased new.
 
Cars acquired from April 2018
                                                            Emissions (g/km) | 
                                                        
                                                            Pool | 
                                                        
                                                            Allowance | 
                                                    
|---|---|---|
| ≤50 | Main rate | 100% FYA | 
| ≤ 110 | Main rate | 18% WDA | 
| >110 | Special rate | 6% WDA | 
- The cost of purchasing capital equipment in a business is not a revenue tax deductible expense. However, tax relief is available on certain capital expenditure in the form of capital allowances.
 - Plant and machinery allowances may be available on items such as machines, equipment, furniture, certain fixtures in a building (' integral features '), computers, cars, vans and similar equipment used in a business.
 - There are special rules for cars and certain 'environmentally friendly' equipment.
 - Plant and machinery allowances may be available to owners of commercial property which is let out to a business.
 - The Annual Investment Allowance (AIA) gives a 100% write-off on most types of plant and machinery (but not cars) up to an annual limit.
 - Writing down allowances (WDA) are given for expenditure for which AIA is not, or cannot be, claimed.
 - Structures and Buildings Allowance is introduced from 29 October 2018 at a rate of 2% on a straight line basis.
 
AIA
- Special rules apply to accounting periods straddling the dates shown in the tables below.
 - The AIA may need to be shared between certain businesses under common ownership.
 
AIA limits - companies
                                                            Expenditure incurred: | 
                                                        
                                                            Annual limit | 
                                                    
|---|---|
| £ | |
| From 1 January 2016 to 31 December 2018 | 200,000 | 
| From 1 January 2019 | 1,000,000 | 
AIA limits - sole traders and partnerships
                                                            Expenditure incurred: | 
                                                        
                                                            Annual limit | 
                                                    
|---|---|
| £ | |
| From 1 January 2016 to 31 December 2018 | 200,000 | 
| From 1 January 2019 to 31 December 2020 | 1,000,000 | 
Other plant and machinery allowances
- Expenditure upon which AIA is not given/claimed will obtain relief through the ' main rate pool ' or the ' special rate pool ' rather than each item being dealt with separately.
 - The annual rate of WDA is 18% in the 'main rate pool' and 6% in the 'special rate pool'. The 8% WDA is reduced to 6% from April 2019. Special rules apply to accounting periods straddling this date.
 - A 100% first year allowance (FYA) may be available on certain energy efficient plant and cars.
 
Cars
- For expenditure incurred on cars, costs are generally allocated to one of the two plant and machinery pools.
 - AIA is not available on any car but a 100% first year allowance may be available on certain cars. To qualify for first year allowance, the car must be purchased new.
 
Cars acquired from April 2018
                                                            Emissions (g/km) | 
                                                        
                                                            Pool | 
                                                        
                                                            Allowance | 
                                                    
|---|---|---|
| ≤50 | Main rate | 100% FYA | 
| ≤ 110 | Main rate | 18% WDA | 
| >110 | Special rate | 6% WDA |