This excerpt taken from the WYNN 8-K filed Sep 11, 2009.
Gaming taxes and premiums
According to the gaming concession granted by the Macau government and the relevant legislation, the Group is required to pay 35% gaming tax on gross gaming win, which represents net wins from casino operations. The Group is also required to pay an additional 4% of gross gaming win as public development and social related contributions. On a monthly basis, the Group also makes certain variable and fixed payments to the Macau government based on the number of slot machines and table games in its possession. These expenses are reported as gaming taxes and premiums in the combined statements of comprehensive income.