What is the night shift allowance policy in IT companies?

I recently read that as per the Factories Act, there is no special pay premium for employees working overnight. However, at the same time, it has been provided by law that no employee is supposed to work for more than 48 hours in a week and 9 hours in a day. Any employee who works for more than this period is eligible for overtime remuneration prescribed as twice the amount of ordinary wages. 

Maybe this is the reason why people in TCS and Infosys  in the night shift seem to be earning double the figures than the others who work in general shift.

Would love if someone can corroborate this information though. 

In core engineering stream too, there are night shift allowance and perks given to the people who opt to work in shifts. I dont think there is separate policy for IT industry but as@Ankita Katdare said, people should not be employed more than 48hrs per week.If employed the firm should pay twice the salary for each extra hour worked.Similary a person should not be employed more than 12 hrs in a day and there should be minimum gap of 8hr for the next shift.

It differs from company to company.

The basis policy for these kind of scenarios are that the time you spend after the office hours in the office you must be paid accordingly and its you lr extra income.

There must be some constraints that also may vary from company to company.

I am currently working in Infosys Ltd.

There is a policy called 18 hour logic in Infosys.

These are some of the things they are giving:

 5 Days Working (4 International)

- Huge Incentives. (4 Int&Dom.Both)

- Free cab (Both Side). (4 International)

- Internet facility, ATM facility, Salary Account (4 Int&Dom.Both)

- Food Court (Free meal Veg an d Non-Veg). (4 International)

- Excellent Growth Path. (4 Int&Dom.Both)

- Medical facility. (4 Int&Dom.Both)

Timing Details:

International:

Morning Shift-7AM To 3 PM(Australian Shift)

Afternoon Shift-1PM To 10 PM(U.K Shift)

Night Shift-8PM To 5 AM(U.S Shift)

Salary: as follows

For Domestic:-

Basic:-12K -15K In-Hand

+ 2000 Attendance Bonus+ Loyalty Bonus+ variables Incentives

For International:-

Basic:-15k-18k In-Hand

+ 2000 Attendance Bonus+ Loyalty Bonus+ variables Incentive

But this Job is for people who are interested in Backend jobs like Data Entry, BPO, call center etc.

In some companies they will have night shifts. And they will pay nearly 500 rupees extra for each day when compared to others. Even i attended an Epsilon interview and they asked me whether i am interested working in night shifts. They also offered cab facility during night for both gents and girls. 

In TCS some of my friends are working from morning 6 to afternoon 2. They told after their work they can do whatever they wish to do. Like my friends many people like to work during night shifts because of extra pay scale and benefits offered to them. There won't be any traffic early morning so they can reach their home early. Also many companies will have night shifts we should agree to work during shifts if we wish to work in that company.