NCCI also produces a number of manuals that govern the details of how Workers Compensation insurance premiums are calculated in many (but not all) states. Among these manuals are the Basic Manual (which sets out rules on the classification code system, payroll amounts used to compute premiums, and changes in classifications and premiums); Experience Rating Manual (which details rules governing how Experience Modification Factors are computed and used in Workers Compensation insurance premiums); and the Scopes Manual (which details how NCCI intends the various classification codes to be assigned to various kinds of employment).
For example, for a roofer, tree trimmer, or demolition company, the cost could be $17 per $100 in payroll, or even higher. On the other hand, the cost to cover a attorney, accountant or real estate agent could be under $0.20 per $100 of their payroll. So, for an employee that earns $40,000 a year, a blue collar contracting company could pay around $6800, where a white collar business may pay just $80. It all depends on the risk or injury associated with the code.