text: Okay, this is a very very very difficult question, b/c there is not an exact science to it. \nNow, obviously each purse for each race is different. Obviously a race like the Daytona 500 has a bigger purse than say Pocono. The purses at each track are split up amongst the field a little differently at each track. If you go to Nascar.com it will list the winnings for each driver for the race. \nThe driver perfoms on Sunday, and depending on the laps he might have led, and his finishing position is what he walks home with. Now, the general number for a lot of the Cup series contract varies around the 40% range, but a lot of that can depend on your sponser's, your owner, your committment to the teams, and of course the team size (from the CC all the way down to the floor sweeper) and the other parts of teh teams success.  Obviiously the bigger the driver you are, the more money that goes directly into your wallet. But, if you take a look at someone like Jeff Gordon who runs for HMS, but also co-owns the #48 car his numbers will vary quite a bit, b/c the money he does make also have to go back into the team.  \nSo once again, there is no exact science and those specific numbers for each contract are kept pretty hush hush.