On average, $41,000
Salaries vary widely just like with players in the NFL. This link will show you all coaches salaries. http://coacheshotseat.com/SalariesNFLCoaches.htm
Click on the 'NFL Salaries - 2007' link below to see salaries for the 2007 season as provided by FOX sports. When on the page, click on the team name underneath the 'NFL Team Payrolls' heading to see the 2007 salaries for the players on that team.
1 Million dollars
$39,000 a month
more than mine