The depreciation period of houses and buildings is limited to 20 years. The depreciation period of aircraft, trains, ships, machinery, machinery and other production equipment is limited to 10 year. The depreciation period of appliances, tools and furniture related to production and business activities is limited to 5 years. The depreciation period of vehicles (except airplanes, trains and ships) is 4 years. The depreciation period of electronic equipment is limited to 3 years. The depreciation period of fixed assets can be determined according to the physical service life, economic service life or economic service life. If the enterprise chooses to shorten the depreciation period, the minimum depreciation period of newly purchased fixed assets shall not be less than 60% of the specified period; The minimum depreciation period of used fixed assets shall not be less than 60% of the remaining years after the specified years minus the used years. Once this minimum depreciation period is confirmed, it is usually not allowed to change.

Depreciation policy of fixed assets in enterprise income tax;

1. Classification of fixed assets: according to the nature and use of fixed assets, it is divided into buildings, machinery and equipment, vehicles, electronic equipment and other categories;

2. Depreciation method: enterprises can use the straight-line method and accelerated depreciation method to calculate the depreciation of fixed assets;

3. Minimum depreciation period: specify the minimum depreciation period of different types of fixed assets, such as 20 years for buildings and 10 years for machinery and equipment;

4. Residual rate: enterprises should consider the expected residual value of fixed assets when calculating depreciation, and the residual rate is usually not higher than10% of the original price of fixed assets;

5. Depreciation start time: depreciation of fixed assets will be calculated from the date when they are put into use;

6. Adjustment of tax law: The tax law may adjust the depreciation policy according to economic development, and enterprises need to pay attention to the latest tax law.

To sum up, the depreciation period of fixed assets in enterprise income tax varies according to the type of assets, ranging from 3 years to 20 years. Enterprises can choose to shorten the depreciation period according to the service life, but the newly purchased assets shall not be less than 60% of the specified life, and the used assets shall not be less than 60% of the remaining life. Once determined, it is usually not allowed to change.

Legal basis:

Regulations of People's Republic of China (PRC) Municipality on the Implementation of Enterprise Income Tax Law

Article 60

Unless otherwise stipulated by the competent departments of finance and taxation of the State Council, the minimum period for calculating the depreciation of fixed assets is as follows: (1) 20 years for houses and buildings; (2) Aircraft, trains, ships, machines, machinery and other production equipment, 10 year; (3) Appliances, tools and furniture. 5 years related to production and business activities; (4) Four years for vehicles other than airplanes, trains and ships; (five) electronic equipment, for 3 years.

People's Republic of China (PRC) enterprise income tax law

Article 43

An enterprise shall, based on the original value of the fixed assets purchased or developed or built by the owner, calculate the depreciation expense according to the depreciation period and depreciation method stipulated by the state and confirm it as the cost.