The IPL is the most consequential single innovation in cricket administration since the introduction of one-day cricket in the 1970s. Its commercial success has restructured player earnings globally, the calendar of international cricket, the financial position of the BCCI within world cricket governance, and the place of franchise T20 leagues in every major cricket nation. The Big Bash League in Australia, the PSL in Pakistan, the SA20 in South Africa, the Hundred in England and the ILT20 in the UAE are all, in different ways, responses to the IPL model — attempts by national boards to capture domestic franchise-cricket markets that, in the absence of such leagues, would be increasingly oriented around the IPL.
The cultural effect on cricket has been similarly substantial and is more contested. Defenders argue that the IPL has democratised cricket viewership in India, brought the game to audiences that had not previously engaged with Test or one-day cricket, financed the broader Indian cricket pyramid, and produced opportunities for domestic players that previously did not exist. Critics — including a number of senior former cricketers — argue that the IPL has weakened Test cricket globally, accelerated player burnout, encouraged a generation of cricketers to optimise for short-format earnings at the expense of long-format craft, and produced governance and integrity vulnerabilities (the 2013 spot-fixing case being the most prominent example) that the format invites by its structure.
For the principals personally, the IPL's launch produced sharply varied legacies. Lalit Modi, the architect, was forced out of cricket administration within two years of the first season and has been the subject of continuing criminal and civil investigation for the period since. The Mumbai Indians, the original franchise of Mukesh Ambani's Reliance, has become the most successful franchise in the league's history and has anchored the broader Reliance entry into international sport. The original BCCI leadership that approved the IPL — including Sharad Pawar as president and N. Srinivasan as treasurer — saw their careers complicated by the league's subsequent controversies. The cricketers themselves became, by the standards of any international team sport, among the highest-paid athletes in the world.