The closest margin of victory in an IPL final was in 2009 when the Deccan Chargers defeated Royal Challengers Bangalore (RCB) by just 6 runs.
In this low-scoring thriller, Deccan Chargers, led by Adam Gilchrist, posted a modest total of 143/6. RCB, in response, struggled against the disciplined Deccan bowling attack, ultimately falling short with 137/9 in their 20 overs