How to calculate the actual examination fee of patent application

The examination of patent substance only exists in the application of invention patent, and there is no such stage for utility model patent and design patent. Invention patents must be examined, and no authorization will be granted without examination. The examination fee for invention application is 2500 yuan. For applicants who have real difficulties, the Patent Office may reduce or exempt some fees (application fee, examination fee for invention application, maintenance fee for invention application, reexamination fee and annual fee for three years after authorization). If the applicant is an organization, the above fees can be reduced by 70% (the examination fee can be reduced by 60%), and if the applicant is an individual, the above fees can be reduced by 85% (the examination fee can be reduced by 80%). Measures for the Reduction and Exemption of Patent Fees Article 4 If the patent applicant or patentee is an individual or unit, the fee stipulated in Article 2 shall be reduced or exempted by 85%. Where two or more individuals or units are the same patent applicant or patentee, the fees stipulated in Article 2 shall be reduced by 70%.