Economic theory

The registered charter capital is paid in full after registration.
The difference in the financing of net assets and authorized capital with the reserve fund should be higher than the planned level of capital increase.
At the end of the year, the amount of net assets should be higher than the authorized capital, starting from the second. Failure to comply with this condition requires a reduction in the authorized capital to a value not exceeding the value of net assets. If the amount of net assets of the organization is less than the minimum amount specified in the charter, the company is liquidated.

The extension itself is possible in the following ways.
External use of borrowed funds by lenders. The creditor has the right to demand membership in the board of founders to guarantee the return of his money. The charter may allow him to leave the board on the condition that his funds be returned.
Contribution of a new member of the Company to the charter fund The Company may decide to increase the capital by attracting new people after the transfer of its share by one of the founders to another person.
The organization has the right to expand the charter capital at the expense of property. An adjustment for such an extension is made only on the basis of the financial statements for the previous year.
Expansion by the executive branch.
It should be borne in mind that the transfer of parts of the charter capital is taxed. There are legal ways to do it without a fee, but this should be done very carefully as non-compliance with the requirements can lead to administrative and criminal liability. It is often easier to pay taxes.
To get a license, you have to pay more than half of the charter capital, you will be given 4 months to pay the rest. Exceptions are joint stock companies, which are given 3 months to pay more than 50% of the charter capital and a year to pay the rest. A joint-stock company that has not paid 50 percent of its charter capital has no right to enter into transactions not related to its establishment, and the decisions of shareholders have no legal force.