Let's assume that the score was $1,000,000, that it was split evenly, and that they each had to kick up $100,000 to Tony (Carmela). And let's further assume that this is treated as a "bonus" instead of regular income, so that no Social Security tax is owed.
According to the IRS's
tax tables for 2005:
I can't remember if Paulie is married, so I'll assume he's single. On his $500,000 income, he would owe $94,727.50 for the first $326,450, and 35% of the remainder. So his tax bill would be $155,470.
Vito is married; let's assume he files jointly. He would owe $88,320 on the first $326,450, and 35% of the remainder. So his tax bill would be $149,062.50.
And that's not even taking into account the New Jersey income tax...