Pennsylvania online gambling revenue tax rates – 36% on sports betting revenue (34% for gross gaming revenue and 2% for local share).Pennsylvania legal online gambling verticals – Online sports betting, online casinos, online poker, online lottery.Key Points for Online Gambling in Pennsylvania Read on for everything you need to know about online sports betting in the Keystone State. Pennsylvania has stood as one of the states at the forefront of the modern era of legal online gambling in the U.S. The Pennsylvania sports betting market consistently operates as one of the biggest in the U.S.