The coal allocation scam, a significant political scandal in India, involves the alleged inefficient allocation of coal blocks by the government from 2004 to 2009, leading to excessive financial gains for approximately 100 private companies. The Comptroller and Auditor General of India reported undue benefits amounting to Rs 10.67 lakh crore, implicating the coal ministry and the Prime Minister's Office during that period. Investigations, including a Central Bureau of Investigation inquiry, followed media revelations, highlighting the controversy and prompting legal challenges in the Supreme Court.