Sports gaming brought in $6 million in taxes last year for Colorado Robert Davis, The Center Square · May 27, 2021 at 7:58 pm Sports betting generated over $6 million in tax revenue in its inaugural year, the Colorado Department of Revenue (DOR) said Tuesday. In total, more than $2.3 billion in wagers were placed between May 1, 2020, and the end of April 2021, according to DOR data. An overwhelming majority were made online because of local COVID-19 restrictions. For the month of April, DOR said more than $244 million in wagers were placed, which was down more than $60 million from March. This total represents an 18% month-over-month decrease, DOR said. Colorado collected just over $1 million in taxes in April while bettors enjoyed a total win rate of 7.19%.