Abstract: Gaming systems are disclosed that include a game implementer arranged to implement a game, an outcome determiner arranged to determine whether an outcome of the game corresponds to a winning outcome, and a prize allocator arranged to allocate a monetary prize to a player when a winning outcome is determined to exist. The example gaming system is arranged to maintain a record of the tax withholding amount (TWA) for a player based on player money in and player money out values for the player over a plurality of games. Corresponding methods are also disclosed.