Yearly charges would depend on whether you set up a company in Delaware or Wyoming.
For Wyoming, you will have to pay the registered agent fee of $49/year (the first year is included) and the Annual Report fee, which is $50.
For Delaware, you will be required to pay the registered agent fee of $50/year from the second year (the first year fee is covered by Firstbase.io) and the franchise fee, which can vary based on the nature of your business or on the number of shares and par value amount for Corporations -- typically, this fee is a few hundred dollars a year. Your registered agent will be able to calculate the fee for you.
Please note that there may be other fees associated with maintaining your business depending on the industry, employment status, number of employees, etc., so please consult with a lawyer or tax specialist for further information about your unique business needs.