A co-panelist with me recently mentioned that her law department regularly compares its fully-loaded hourly billing rate for lawyers with the average rate charged by outside counsel. The comparison has a fair amount of validity, but some faults can mar the match (See my post of June 29, 2009: insurance company’s calculation of savings based on fully loaded costs.).
The internal load needs to be full, that is, to include all the costs of internal lawyers (See my post of Aug. 27, 2008: fully-loaded cost per lawyer hour with 31 references; and March 9, 2009: fully-loaded with 7 more posts.).
The chargeable hours estimated or tracked for the internal legal group must be legitimate (See my post of May 21, 2009: internal chargeable hours with 12 references; and Jan. 5, 2011: internal time tracking with 9 references and one metaposts).