The calculation formula of double declining balance method is as follows: annual depreciation rate = 2/ expected service life (year) * 100%, annual depreciation amount = net book value of fixed assets at the beginning of each depreciation year * annual depreciation rate, monthly depreciation amount = annual depreciation amount/12.
The calculation formula of the sum of years method is as follows: annual depreciation rate = (estimated service life-used service life)/[estimated service life * (estimated service life+1 )/2]* 100%, or annual depreciation rate = total acceptable service life/estimated service life * 100%.
After depreciation of fixed assets, the treatment method is as follows:
1. The enterprise will dispose of the fully depreciated fixed assets and transfer all the book balance of the fixed assets to the fixed assets clearing account. After the transfer, the balance of fixed assets and accumulated depreciation account should be 0;
2. The income generated during the disposal of fixed assets shall be included in the credit of fixed assets liquidation;
3. The expenses incurred in the process of disposing of fixed assets shall be included in the debit of the fixed assets clearing account.
The depreciation period of equipment is specified as follows:
(1) power supply system equipment 15 to 20 years, heating system equipment 1 1 to 18 years;
(2) Central air conditioning equipment 10 to 20 years, communication equipment 8 to 10 years;
(3) Washing equipment for 5 to 10 years, and maintaining equipment for 10 years;
(4) Kitchen utensils and equipment for 5 to 10 years;
(5) Electronic computer system equipment is 6 to 10 years, and elevator 10 years;
(6) 8 to 10 years for photo printing equipment and 3 to 8 years for copying and typing equipment.
legal ground
Article 60 of the Regulations for the Implementation of the Enterprise Income Tax Law of People's Republic of China (PRC).
Unless otherwise stipulated by the competent departments of finance and taxation of the State Council, the minimum depreciation period of fixed assets is as follows:
(a) houses and buildings, for 20 years;
(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.