A study by the National Association for Legal Career Professionals (NALP)
 offers data on billable hours, calculated by firm size:

Firm Size (Number of Lawyers)

Average Total Hours Worked in 2005

Average Billable Hours Worked in 2005

 
50 or fewer attorneys

 
1,950

 
1,823

 
51-100 attorneys


2,005

 
1,851


101-250 attorneys

 
2,040

 
1,843

 
251-500 attorneys

 
2,123

 
1,861


501-700 attorneys

 


2,168


1,836

 

701+ attorneys

 

2,124

 

1,870