Auto, Truck and Motorcycle Parts Manufacturing Workers Compensation (class code: 3840) Insurance

Workers’ Compensation under Class Code 3840 is associated with Auto, Truck, and Motorcycle Parts Manufacturing, and assesses and manages risks associated with workplace injuries in this particular industry.

Workers Compensation Class Code 3840 is distinct from Class Code 3808, although both are related to manufacturing within the broader industry.

Class Code 3808 specifically pertains to Automobile or Truck Bodies manufacturing, while Class Code 3840 encompasses Auto, Truck, and Motorcycle Parts Manufacturing.

The nature of this work involves various tasks such as machining, fabrication, assembly, and quality control within a manufacturing setting.  Coverage for this class code is designed to provide financial protection for both employers and employees in the event of work-related injuries, ensuring that medical expenses, rehabilitation costs, and lost wages are covered.

What is Auto, Truck and Motorcycle Parts Manufacturing Workers Compensation (class code: 3840)?

Workers’ compensation for class code 3840 covers employees engaged in the manufacture of parts for automobiles, trucks, and motorcycles. It is a form of employer-paid insurance that helps cover medical care, rehabilitation, and a portion of lost wages if an employee is injured on the job. This coverage sits alongside other commercial protections such as commercial liability and property coverage that manufacturers commonly consider.

Who needs it

Any business that employs workers in machining, stamping, assembly, welding, painting, finishing, or quality control for vehicle parts should carry workers’ compensation for class code 3840. This includes small shops and larger manufacturers as well as suppliers and contract assemblers. For broader workplace guidance and more tailored program options, businesses often review resources like Automobile and Truck Parts Workers Compensation.

What it typically covers

Standard workers’ compensation benefits commonly include medical treatment, temporary disability payments, permanent impairment benefits, and vocational rehabilitation when needed. The policy may also interact with other coverages (for example, equipment coverage or commercial auto exposure) depending on operations and exposures. For related manufacturing classes, see resources such as Automobile or Motorcycle Manufacturing Workers' Compensation (Class Code 3803) which discusses similar exposures for production operations.

Common exclusions or limitations

  • Injuries outside of work hours or off-premises personal activities are typically excluded.
  • Intentional self-harm or injuries resulting from intoxication are commonly excluded.
  • Independent contractors may not be covered unless specifically endorsed.

Factors that influence cost

Premiums are based on payroll, job classification, claims history, and underwriting factors such as safety programs and return-to-work policies. Operational hazards like heavy equipment use, welding, and material handling tend to raise rates, while robust risk management and training can reduce costs over time.

Proof of insurance & compliance

Employers must often provide certificates of insurance or proof of workers’ compensation coverage to clients, contractors, and state agencies. Requirements vary by state and contract, so keeping current documentation and a clear injury reporting process is important for compliance and to limit liability exposures.

How to get a quote

To obtain a quote, gather payroll details by job classification, any recent loss runs, and information about safety programs. You can also discuss your specific operations with an agent — talk to your agent to review coverage limits, endorsements, and any additional protections like participant accident coverage or property endorsements.

Frequently Asked Questions

Does class code 3840 cover subcontracted workers?

Coverage for subcontractors depends on how they are classified and whether they provide proof of their own workers’ compensation. Many employers require certificates of insurance from subcontractors.

How do claims affect my premium?

Claims can increase your experience modification factor, which may raise premiums. Effective safety programs and prompt return-to-work policies can help mitigate long-term cost increases.

Are office staff included under class code 3840?

Office employees are usually classified under different, lower-rate codes. Payroll should be reported by job classification so each employee is assessed under the correct class.

Still have questions? Talk to a local insurance expert.

Partners, Programs & Market Access


We maintain relationships with nationally recognized and specialty-focused insurance providers that actively underwrite this class of business. Our network includes both admitted and non-admitted markets, allowing us to match risks—from straightforward accounts to more complex or hard-to-place exposures—with appropriate underwriting partners.


Program availability, coverage terms, and underwriting appetite can vary based on operations, location, and loss history, so access to multiple markets is key to securing the right fit. This approach helps ensure broader coverage options and more competitive placement across a range of risk profiles.



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