How was the hike calculated? AICPI index numbers rose steadily from January to June 2025. With the June 2025 index reaching 145.0, the total DA became 58.18%. As per regulations, decimals are disregarded, setting the DA at 58%. For example, someone with a basic salary of Rs. 18,000 will receive an additional Rs. 540 per month, a yearly increase of Rs. 6,480.