Introducing a DA system is not too complex but is cumbersome. As you are aware, the DA system is linked to the Cost of Living. The DA is connected to the rise in the consumer price index published by the Government, and these details are provided in the monthly magazine titled "Uzhaipavar Ulagam" by the Government of Tamilnadu, Labour Department located in Teynampet, Chennai. If you subscribe to the magazine for 20 years, the cost is very nominal, and you will get a sense of the points' increase over the past few months.
Generally, companies offer a fixed DA that aligns with the Minimum Wages prescribed for the industry. Afterward, for each point's increase, they provide a monetary compensation, for example, Rs. 1.50 per point. If there is a rise, the DA increases, and if there is a fall, the DA decreases. However, the points for the current month will only be published next month, making it challenging to backtrack the wages paid. Therefore, companies establish a policy to revise the DA at a frequency (number of months) based on the DA's rise or fall. If there is a union, this may become a contentious negotiation point regarding monetary compensation for each point's increase (Rs. 1.50 per point as mentioned above).
Please carefully consider this, create a sample worksheet for the past 2-3 years, study the wage implications if you had implemented it 2-3 years prior, compare the CTC increases, and then propose it to the management.
Regards,
M.V. Kannan