There is actually a phase in process underway, particularly in banking. For example, from the RMA site under Annual Statement Studies, which has always been SIC code driven:
NAICS Conversion Time Table
Currently, the Annual Statement Studies is published with the industries sorted by Standard Industrial Classification (SIC) codes, with a reference to the North American Industrial Classification System (NAICS) codes.
On October 1, 2000, the U.S. Small Business Administration (SBA) adopted the NAICS, believing it would more accurately reflect the composition of today's small business sector, especially the newer portions like the fast-growing technology area.
In talking with our members, we know that many of them this year have converted, or have plans to convert, to the NAICS codes. Fortunately for banks, there is no required conversion date set by the banking regulators, but RMA does still plan to convert.
Following is a time line, which RMA has outlined for the planned conversion to the NAICS codes:
Fall 2001: SIC w/NAICS
Fall 2002: SIC w/NAICS
Fall 2003: NAICS w/SIC
Fall 2004: NAICS w/SIC
Fall 2005: NAICS only
Therefore, if you need to compare your customers against other similar firms, you will need to convert by 2005 in order to continue to use the RMA data.