New Delhi, July 27 -- Tata Sons, the holding company of the Tata Group, took a significant hit to its net profit last fiscal-at the centre of which lies a long-standing due of a legacy business that has played out for decades.

The 108th annual report of the chips-to-hotels conglomerate, published Monday, said that Tata Sons took a one-time 'impairment' of Rs.4,582.24 crore due to adjusted gross revenue (AGR) dues that its subsidiary, Tata Teleservices, owed to the Centre's Department of Telecommunications (DoT) in FY26.

Had it not been for this one-time hit, Tata Sons' profit after tax would have been about Rs.36,543 crore instead of Rs.31,961.11 crore.

The one-time hit in the form of impairment, which in simple words refers to a one-t...