The cost of filing a patent application in India can vary depending on several factors, such as the type of applicant, the nature of the invention, and the mode of filing. Here are some of the main costs associated with filing a patent application in India: Filing fee: The basic filing fee for a patent application in India ranges from INR 1,600 to INR 4,000, depending on the type of applicant (individual, startup, small entity, or large entity). Specification fee: A fee of INR 160 per page is charged for filing the specification of the patent application. The specification is the part of the application that describes the invention in detail. Claim fee: A fee of INR 320 per claim is charged for filing the claims of the patent application. The claims define the legal scope of the invention. Examination fee: Once the patent application is filed, an examination request can be made by paying a fee of INR 4,000 to INR 10,000, depending on the type of applicant. The examination fee is not required to be paid at the time of filing the application. Renewal fee: Once the patent is granted, renewal fees must be paid annually to maintain the patent in force. The renewal fees range from INR 1,600 to INR 16,000, depending on the age of the patent. It's important to note that these fees are subject to change, and additional fees may be required for amendments, extensions, or other actions related to the patent application.