Having worked in the private sector for more than 30 years, there are generally two sets of employees: management and non-management cadre. Among the management cadre employees, particularly those working in the plants and living in the adjacent township, it is expected that they are always available to attend all emergencies round the clock. There is no compensation granted for such a cadre of employees due to the inherent obligation of the position.
Even if you refer to your state factories rules, a certain class of employees is exempted from the provisions of Sections 51, 52, etc., and are permitted to work beyond the statutory limit of working hours.
In the above case, if there is any system of payment, you can compensate for 5 hours and not for 8 hours provided you are not deducting any salary for inordinate late coming or early going.
Dr. Kamlesh Agrawal
Mumbai