| Allowance % | |
| Plant and machinery | |
| - annual investment allowance: £100,000* | 100 |
| - certain energy efficient plant, including low emission cars | 100 |
| - writing down allowance: general pool | 20 |
| - writing down allowance: special rate pool | 10 |
| *will fall to £25,000 on 1.4.12 (companies) or 6.4.12 (income tax traders); WDA fall to 18%/8% at same date. | |
| The special rate pool includes long life assets, integral plant in buildings, thermal insulation and cars with CO2 emissions over 160g/km. The general pool contains other plant and machinery. | |
| The old system of cheap/expensive cars has been abolished, but transitional rules cover existing expenditure before April 2009. | |

