According to Article 67 of the "Regulations on the Implementation of the Enterprise Income Tax Law of the People's Republic of China": the amortization expenses of intangible assets calculated according to the straight-line method are allowed to be deducted.
The amortization period of intangible assets shall not be less than 10 years.
As an investment or transferred intangible asset, if the useful life is stipulated in relevant laws or contracts, it can be amortized in installments according to the prescribed or agreed useful life.
Therefore, the company’s annual amortization expenses should be:
1. Purchased patent rights 600/6=1 million yuan
2. Self-developed patent Trademark right 500/10=500,000 yuan
The total annual amortization expense is 1.5 million yuan