What happens if a business does not accurately split its payroll by class code?

In workers compensation, the carrier's audit will reallocate payroll based on actual employee duties. If employees were understated in higher-rated classes, the audit generates additional premium. In severe cases, where misclassification appears intentional, the carrier may void the policy or refer the matter to the special investigations unit. Agents have a professional obligation to record the class breakdown accurately on the application.

Is there a minimum payroll amount required for a class to be split out separately?

NCCI and state bureau rules have specific provisions regarding classification of employees with multiple duties and minimum payroll thresholds for certain clerical and outside sales classes. The general principle is that an operation must be genuinely distinct from the primary operations to warrant separate classification. Incidental duties — an employee who spends 90% of their time in production and occasionally performs filing — are typically not split out.

How does split rating affect a multi-location commercial account?

Multi-location accounts may have different class codes applicable at different locations, particularly in commercial property (different construction types or occupancies) and general liability (different operations by location). Rating systems must correctly apply territory-specific rates and class-specific loss costs to each location's exposure. Comparative raters handling commercial lines increasingly support location-level rating detail, though complex multi-location accounts often require manual underwriting.

Split Rating

Application of different rates to separate portions of a single exposure — for example, different payroll classes within a workers compensation policy.

businessPublished 2026/06/07Last verified 2026/06/07

FAQs

What happens if a business does not accurately split its payroll by class code?: In workers compensation, the carrier's audit will reallocate payroll based on actual employee duties. If employees were understated in higher-rated classes, the audit generates additional premium. In severe cases, where misclassification appears intentional, the carrier may void the policy or refer the matter to the special investigations unit. Agents have a professional obligation to record the class breakdown accurately on the application.
Is there a minimum payroll amount required for a class to be split out separately?: NCCI and state bureau rules have specific provisions regarding classification of employees with multiple duties and minimum payroll thresholds for certain clerical and outside sales classes. The general principle is that an operation must be genuinely distinct from the primary operations to warrant separate classification. Incidental duties — an employee who spends 90% of their time in production and occasionally performs filing — are typically not split out.
How does split rating affect a multi-location commercial account?: Multi-location accounts may have different class codes applicable at different locations, particularly in commercial property (different construction types or occupancies) and general liability (different operations by location). Rating systems must correctly apply territory-specific rates and class-specific loss costs to each location's exposure. Comparative raters handling commercial lines increasingly support location-level rating detail, though complex multi-location accounts often require manual underwriting.

Related Terms

Split Rating

Application of different rates to separate portions of a single exposure — for example, different payroll classes within a workers compensation policy.

businessPublished 2026/06/07Last verified 2026/06/07

FAQs

What happens if a business does not accurately split its payroll by class code?: In workers compensation, the carrier's audit will reallocate payroll based on actual employee duties. If employees were understated in higher-rated classes, the audit generates additional premium. In severe cases, where misclassification appears intentional, the carrier may void the policy or refer the matter to the special investigations unit. Agents have a professional obligation to record the class breakdown accurately on the application.
Is there a minimum payroll amount required for a class to be split out separately?: NCCI and state bureau rules have specific provisions regarding classification of employees with multiple duties and minimum payroll thresholds for certain clerical and outside sales classes. The general principle is that an operation must be genuinely distinct from the primary operations to warrant separate classification. Incidental duties — an employee who spends 90% of their time in production and occasionally performs filing — are typically not split out.
How does split rating affect a multi-location commercial account?: Multi-location accounts may have different class codes applicable at different locations, particularly in commercial property (different construction types or occupancies) and general liability (different operations by location). Rating systems must correctly apply territory-specific rates and class-specific loss costs to each location's exposure. Comparative raters handling commercial lines increasingly support location-level rating detail, though complex multi-location accounts often require manual underwriting.

Related Terms

Related Items

How It Works / Why It Matters

The clearest example of split rating is workers compensation: a manufacturing company with both production floor workers and office staff will have its payroll split between the appropriate production class code (e.g., NCCI code 3632 for machine shop operations) and the clerical office class (NCCI code 8810). Each class code carries a different loss cost reflecting its distinct injury frequency and severity profile. The total WC premium is the sum of premiums calculated separately for each class.

Accurate class code assignment is foundational to split rating. The WC payroll split must reflect actual employee duties — assigning production employees to a clerical class to reduce premium is misclassification, a form of premium leakage that auditors detect by comparing payroll distribution to job titles and operational records. The standard rule is that an employee performing multiple duties is classified to the highest-rated class that applies to any portion of their work, with limited exceptions for incidental duties.

In general liability, split rating applies when a business has distinct operations that belong in different GL classification codes. A contractor who performs both carpentry (a lower-hazard classification) and roofing (a higher-hazard classification) will have their payroll split between both classes, with each class's rate applied to the respective portion. If the split is not performed, the entire payroll is typically rated at the more hazardous class — increasing the premium but eliminating the misclassification risk.

Commercial auto split rating occurs when a fleet includes vehicles used for different purposes — some rated as private passenger types, others as light trucks, others as heavy trucks — with each category carrying a different per-vehicle rate.

In Practice

Agents writing commercial accounts must accurately document the operational split to ensure correct premium calculation and avoid audit adjustments. A general liability policy written on estimated sales must allocate those sales between classifications when the account has multiple operations. WC policies require payroll allocation by class at inception and reconciliation through the audit process.

The experience modifier in workers compensation interacts with split rating at the class level. The experience modifier is calculated on the account's total experience across all classes, producing a single modifier applied to the total manual premium. However, the underlying manual premium calculation — which the modifier is applied to — requires accurate class-level payroll splits to be correct.

Platforms like Applied Epic and Guidewire support multi-class rating within a single policy, allowing agents and underwriters to manage class-level exposure splits and track audit results by class. Accurate data entry at the class level is necessary for the system to produce correct premiums and generate proper audit worksheets at expiration.

Scheduled rating may be applied at the account level (to the total premium across all classes) or separately to individual class components, depending on the carrier's filed rating plan and the underwriter's approach. When the classes represent genuinely different risk quality levels — an account with excellent safety in some operations but poor safety in others — class-level scheduled adjustments may be more accurate than a blended account-level modifier.

Related Concepts

GL exposure basis interacts with split rating in general liability: when different operations within a business use different exposure bases (some rated on payroll, others on gross sales, others on units), the rating process must correctly assign each exposure unit to its applicable class and apply the appropriate basis-specific rate.

Split Rating

FAQs

Related Terms

Experience Modifier

GL Exposure Basis

Scheduled Rating

Premium Leakage

Related Items

Applied Epic

Guidewire

Split Rating

FAQs

Related Terms

Experience Modifier

GL Exposure Basis

Scheduled Rating

Premium Leakage

Related Items

Applied Epic

Guidewire

How It Works / Why It Matters

In Practice