The annuity option is higher than it has been, relative to the cash option, due to higher interest rates that make it possible for the game to fund larger annuitized prizes, according to the Multi-State Lottery Association, which runs Powerball.
The cash option, however, is driven by ticket sales.
Assuming you were like most winners and chose the cash option, a 24% federal tax withholding would reduce the $497.3 million by $119.4 million.
The top federal income tax rate is 37% and this year applies to income above $539,900 for individual tax filers and $647,850 for married couples.
While some jurisdictions have no income tax — or do not tax lottery winnings — others impose a top tax rate of more than 10%.