State-owned Coal India Limited (CIL) has upgraded the pay scale of its mid-level executives with effect from January 1, 2017. The company gave this information in a regulatory filing, however, the financial impact of the pay revision will be given from August 23, 2023. According to the filing late on Monday night, the total estimated financial impact of this upgradation will be around Rs 3,400 crore by December 31, 2026. Coal India is the world’s largest coal producing company and operates through several subsidiary companies in coal producing states.