1. Typically, PF, ESI, Wages/Min Wage Rules, Gratuity, Bonus, Contract Labour etc. shall be as according to central labour laws
2. Shops & Commercial Establishment Act shall be applicable for establishments covered as mentioned in relevant state rules
3. Factory act for factories
4.Professional Tax as per state rules
5. Labour Welfare Fund for 15 states/Union Territories
So based on state, nature of business, type of industry, number of employees, the responsibilities, maintenance of registers and returns and overall compliance can vary
Any business, whether pvt ltd, public ltd, proprietory or partnership, has the same liabilities towards its employees.
The liability being to pay them salary for the work done,
to pay them above minimum wages
and in case of termination of employment, give the dues as per law.
Minimum leave to be provided is also specified in the law. Whether it is to be encashed or not is also provided.
There is no law stating that increment is to be given. That is the decision of the business.
Ofcourse, there is nothing that prevents a business from giving any terms to its employees that are better than that required by law.