The Estimated Net Worth of Isaiah Thomas is $20.4 Million. The Net Worth of Isaiah Thomas has seen a hike of 156% over the past 3 years. Isaiah Thomas is an American professional basketball player for the Boston Celtics of the National Basketball Association (NBA). While calculating the Net Worth of Isaiah Thomas we have included the data updated as of this Quarter. Check out the Exclusive information on Isaiah Thomas Net Worth details such as Yearly Income, House, Investments,Car Collection, Brand Endorsements etc.