In Irish real cash casinos, your winnings will be taxed only if you are a professional gambler which should be separately proved in each case. The Ireland gamblers are probably the most fortunate since the government does not tax their winnings and only collects taxes from online casinos. In the US, winnings are fully taxable, and you should report them as part of your income. But be it an Irish, American or Canadian online casino, real money is regularly being won in fantastic amounts, and you easily can become the next lucky instant billionaire. So, don't miss your chance!