Workers’ comp class codes group businesses or operations by insurance risk. The assigned classification affects payroll rating. In California, estimated payroll for each class is multiplied by its rate per $100. The final premium is determined after a post-policy payroll audit, according to the California Department of Insurance.
Review assigned codes against actual operations and employee duties, then verify any payroll split with supporting records. In California, payroll may be divided between classifications only when complete, accurate time records support the split, not estimates. Rules vary by state, so a generic code list may not fit an employer’s work.
Key Takeaways
- Workers’ comp class codes and rating rules vary by state, so employers should match the full classification description to actual operations and employee duties and consult the applicable state authority.
- In California, each classification’s estimated payroll is multiplied by its rate per $100 to calculate that portion of base premium, and the final premium is determined after the policy term and payroll audit.
- In California, employers may split an employee’s payroll between classifications only when complete, accurate records such as original time cards or time-book entries support the allocation; estimates, percentages, and averages are not acceptable.
- Employers should compare policy classifications, employee duties, payroll, and supporting records when operations or duties change or audit findings suggest a mismatch, and ask the insurer or broker in writing to explain disputed assignments.
What Are Workers’ Comp Class Codes?
Workers’ comp class codes group businesses or operations by industrial or occupational risk. The New York State Workers’ Compensation Board says more than 700 work classifications are in use in New York, reflecting the range of risks these classifications distinguish.
Classification systems and approved rates vary by state. In California, insurers set rates for industry classification codes and file them with the California Department of Insurance before use. A code or rate from one state may not apply in another.
A governing classification is a basic classification, other than a standard exception, that accounts for the greatest payroll on a policy. Standard exceptions commonly include clerical employees, drivers, and salespersons. The governing classification does not necessarily apply to every employee; it identifies the basic classification with the most payroll.
Assigned classifications should reflect the employer’s actual operations and employees’ duties. A code describing a different type of operation or work may not represent the insured risk, even if its label seems to fit the business.
How Do You Find Your Class Code?
To find a workers’ comp class code, confirm the state where the work is performed, identify the classification system used there, and match the classification description to the employer’s operations and employee duties. Use the authority for that state rather than relying on a generic national list.
- Identify each state where employees perform work and determine whether its classification system uses NCCI codes or state-specific classifications.
- Consult NCCI materials where NCCI classifications apply, the Workers’ Compensation Insurance Rating Bureau of California for California, or the New York State Workers’ Compensation Board for New York. The Board describes codes as industrial or occupational risk categories in its glossary.
- Compare the full classification description with the business’s actual operations and employees’ duties, rather than relying on job titles alone.
- In California, assign a business to a classification that specifically describes it. If none does, assign the most analogous classification.
How Do Class Codes Affect Premium?
In California, the classification-and-rate component of base premium is calculated by multiplying each classification’s estimated payroll by its applicable rate per $100 of payroll, according to the California Department of Insurance. When payroll is assigned to multiple classifications, multiply each classification’s payroll by its applicable rate. Both the rate and the payroll assigned to a classification affect this premium component. California uses an open-rating system: insurers set rates for industry classification codes and file them with the California Department of Insurance before use. As a result, the rate for a classification can depend on the insurer. California rates should not be applied to another state, where classification systems and rating rules may differ. A class code is one factor in the complete premium calculation. The assigned payroll and applicable rate affect the base-premium component, while the final premium is determined after the policy term and payroll audit, as the California Department of Insurance explains.
What Records Support Payroll Allocation?
In California, payroll may be divided between classifications only when complete, accurate records support the split, including original time cards or time-book entries. Under California classification guidance, percentages, averages, and estimates cannot be used to divide an employee’s payroll. Before an audit, compare each classification with employees’ actual duties and review payroll reports alongside original time records. When an employee works under more than one classification, keep records supporting the payroll allocation for each one. Retain the original records, not just later summaries. In California, final premium cannot be calculated until the policy term ends and payroll records are audited, according to the California Department of Insurance. Insurers generally may audit payroll during the policy period and within three years after it ends. An employer that does not permit an audit may be liable for total premium equal to three times the estimated policy premium. These audit rules are specific to California, not a nationwide requirement.
When Should You Recheck A Classification?
Recheck a workers’ comp classification when changes to operations, employee duties, payroll assignments, or audit findings suggest that the assigned code may not reflect the insured work. NCCI inspection data for 2025 found that 56% of inspected policies with governing Code 8292 were reclassified; 78% of those reclassifications were to a mercantile code. This finding is a reason to verify operations and assigned codes, not a prediction that any employer’s Code 8292 is wrong.
A code’s description should fit the work, not just the employer’s industry label or an employee’s title. For example, NCCI’s Class Code 8810 is limited to eligible general office duties such as maintaining employer records, correspondence or files, telephone duties, data entry, and word processing. Work outside that scope may require a closer classification review, depending on the applicable rules and actual duties.
Review business operations, employee duties, payroll by classification, and supporting audit records together. A code may seem plausible on its own, while the broader operations or payroll records point to a mismatch. Reviewing them together helps determine whether the classification accurately reflects the insured work.
Review Your Payroll And Classifications
Start with the policy declarations, payroll register, employee roster, and latest audit worksheet. Create a table listing each employee’s assigned class code, actual duties, payroll charged to that code, and supporting records. Compare duties with the full class description, not just job titles.
Flag mismatches, unexplained payroll changes, and employees with different duties charged to one code. Gather the related job descriptions, time records, and payroll details, then ask the insurer or broker in writing what rule supports the assignment and what records would support a correction. Keep the reply with the policy file.
For a California policy, compare the final premium worksheet’s payroll and rates for each classification with your records. The California Department of Insurance explains the calculation in its workers’ compensation guide. For employees working in multiple states, make a separate table for each state and check classifications with that state’s authority.
Frequently Asked Questions
1. What is the difference between workers’ comp Codes 8810 and 8742?
NCCI Code 8810 covers eligible general office duties, such as maintaining records, handling correspondence, answering phones, data entry, and word processing. Code 8742 is a separate classification. Compare its full description under the applicable state’s system with the employee’s actual duties before deciding which code fits.
2. Does a lower class code always result in a lower workers’ comp premium?
No. A lower-numbered class code does not automatically mean a lower premium because both the classification rate and the payroll assigned to it matter. In California, the classification-and-rate component is calculated using each class’s payroll and applicable rate per $100, and insurers file their rates with the California Department of Insurance.
3. Can an employer challenge a classification after a payroll audit?
An employer can ask the insurer or broker to review a classification after an audit and explain the rule supporting the assignment. Provide records showing employees’ actual duties and supporting any payroll allocation. In California, payroll splits between classifications require complete, accurate records, not estimates.
