Dear Meetca,
A lot of companies in our country are still without DA component in their salary packages. To compensate the employees against the increase in the price index, they provide a varying lump sum between 15% to 30% of the existing Basic pay annually as an increment based on the individual's performance. In this case, only basic pay is considered for various obligations including PF, Bonus, Gratuity, as well as Notice pay and calculation of EL/PL encashment.
With regards,
R.K. Singh