On February 2, 2023, the championship's sanctioning body announced that the Indianapolis 500 would no longer be a double points-paying race, ending a rule that was first established in 2014. In addition to these changes by the series, new sponsorships were announced including that Shell USA would replace Speedway LLC as an official fuel partner and supplier, with the series introducing a 100% renewable fuel. The money was allocated towards the Series' marketing budget. In February 2023, it was reported by Marshall Pruett of that the annual Leader's Circle contracts earned by entries which compete in the full season would be reduced by $150,000 each to a value of $910,000. In February 2023 it was confirmed that the series organizer, Penske Entertainment Corp., planned for a marketing budget of approximately US$17 million focusing on 20 markets deemed important by series leadership. Produced by Vice Media, Penske Entertainment president Mark Miles noted that Penske Entertainment would receive some monetary compensation in return for facilitating behind-the-scenes access. On December 8, 2022, the CW Network announced a reality documentary series titled '100 Days to Indy,' which would premiere on April 27, 2023. The 2023 season saw several marketing changes intended to increase domestic viewership of the series. In February 2023, 2013 Indianapolis 500 winner and 2004 Ind圜ar Series champion Tony Kanaan announced that he would retire from Ind圜ar after the Indianapolis 500.

Defending Indianapolis 500 winner Marcus Ericsson entered 2023 in a contract year for Chip Ganassi Racing. Will Power of Team Penske entered the season as the reigning drivers' champion, having won the title at the final round in Laguna Seca by 16 points over his teammate Josef Newgarden. The showcase event was the 107th Indianapolis 500. The 2023 NTT Ind圜ar Series is the ongoing 112th official championship season of American open wheel racing and the 28th season under Ind圜ar Series sanction. Álex Palou (left) is the championship points leader Marcus Ericsson (right) is second, 51 points behind.

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