However, with the top federal tax rate of 37 percent applied to income above about $510,000 for single tax filers ($612,000 for married couples filing jointly) you could count on owing more — a lot more.
For illustration purposes: If the winner had no other reductions in income — for example, significant charitable contributions from the winnings that reduced taxable income — this would mean another 13 percent, or $25.5 million, going to the IRS ($72.5 million in all).
At that point, you’d be left with $123.6 million. And that’s before state taxes (unless lottery wins are not taxed locally), which can range up to more than 8 percent, depending on where the ticket was purchased and where you live.
In other words, the winner could end up paying north of 45 percent in taxes.
For Mega Millions, the 24 percent federal withholding would reduce the $148.3 million cash option by $35.6 million to $112.7 million. Again assuming no reduction in taxable income, another $19.3 million or so would be due to the IRS, for a total of $54.9 million.
Meanwhile, Uncle Sam could be keeping an eye the still-unclaimed $1.5 billion Mega Millions jackpot along with other lottery watchers. The automatic 24 percent federal withholding on that jackpot’s $877.8 million cash option would mean a whopping $210.7 million going to the IRS right off the bat.
The winner (or group of winners) has until April 19 to claim the prize. If no one comes forward by then, all of the prize money would be redistributed to the states and locales that participate in Mega Millions.