Yes, according to Polish law, players must pay taxes on winnings in online casinos. Even when placing a stake, 12% gaming tax is charged. This applies to both winning and losing. Additionally, tax 10% is collected from each winning amount exceeding PLN 2,280 and transferred to the account of the tax office. However, not all games are covered by it - the exceptions are, among others, slot machines, dice and card games. Taxes are automatically withheld by the casino when winnings are paid out. You do not have to settle your taxes with the tax office yourself. The only exception are large winnings (over PLN 2,280), which, according to the law, must be included in the annual PIT tax return.