In the United States, a “jackpot” is defined by the IRS as a Single win exceeding $1199.99. If your win amount exceeds this number, you will be required to present your Valid ID and provided a Social Security Number or TaxID. These wins are reported to the IRS and you will receive a W2G Form for your taxes. Remember, this is just for a single win, you can accumulate over that amount with smaller wins and not be taxed.
Many people seem to “Win all the time” however always consider the amount they are playing. If a person is playing a high denomination slot machine then hitting this threshold is a very common, sometimes annoying, occurrence.