Under the Factories Act, during a calendar year (January to December), to be entitled to Earned Leave (EL), an employee must have worked for a continuous period of 240 days. This period includes Weekly Offs and leave, including Leave Without Pay (LWP). The only exception is the period of unauthorized absence from work, which will not be counted towards the 240-day requirement, the basic qualifying criteria for EL entitlement.
EL is calculated at the rate of 1 day for every 20 days worked. For the purpose of the 240 days requirement, EL is also taken into consideration. However, EL is not accrued for days when one is on EL or any other form of leave. EL earned during the current year can only be utilized in the following year. Encashment of EL is generally based on Gross pay.
I hope I have addressed your queries. It would be beneficial for you to read the relevant sections of the Factories Act to gain a thorough understanding of the treatment of EL for your own enrichment.
Best Wishes,
Vasant Nair