As a CA Partnership LLP firm based in Mumbai with 50 employees, you are indeed subject to certain labour laws.
1. The Mumbai/Maharashtra Shops and Establishment Act applies to all establishments, including yours, that operate within the state of Maharashtra.
2. The Provident Fund (PF) is applicable to your firm under the Employees' Provident Fund and Miscellaneous Provisions Act, 1952. This law applies to any firm employing 20 or more individuals. As you have 50 employees, you fall under this act.
3. The Employee's State Insurance Corporation (ESIC) is applicable to your firm under the Employees' State Insurance Act, 1948. This act applies to non-seasonal factories employing 10 or more persons. While your firm is not a factory, the act has been extended to cover shops, hotels, restaurants, cinemas, and road motor transport establishments employing 20 or more persons.
4. The Maternity Benefit Act, 1961 applies to your firm. This act applies to all establishments employing 10 or more persons. Under this act, a woman is entitled to a maximum of 26 weeks of maternity benefit (leave).
5. Other laws that might apply to your firm include the Payment of Gratuity Act, 1972 (applicable to establishments with 10 or more employees), the Payment of Bonus Act, 1965 (applicable to establishments with 20 or more employees), and the Sexual Harassment of Women at Workplace (Prevention, Prohibition and Redressal) Act, 2013 (applicable to all establishments).
Please consult with a legal professional or a labour law consultant to ensure your firm is in compliance with all relevant laws and regulations.