The IRS uses NAICS codes as IRS Business Codes (or Business Activity Codes) These codes are the more updated version of Standard Industrial Classification (SIC) codes which were created as a way for the government to track business activity in North America. You choose your NAICS code based on your primary business activity, and you want to choose the correct code for several reasons, including small business financing. If your business is in a low-risk industry, then you may have trouble getting certain types of financing opportunities. There is no