Medical marijuana tax collections topped $2.77 million last month, $26.7 million for the year November 3, 2022 By Griffin Coop Medical marijuana tax revenue topped $2.77 million last month, bringing the total tax collections for the year to $26.7 million, according to data released by the state Department of Finance and Administration this week. The state collected $2,771,232 last month in taxes on medical marijuana, the most since April. Medical marijuana patients pay a 6.5% sales tax and a 4% excise tax when they make purchases. Dispensaries also pay a 4% excise tax when they make purchases from cultivators.