Machine Shops Workers Compensation (class code: 3632) Insurance

What is Machine Shops Workers Compensation (class code: 3632)?

Machine shops workers compensation insurance (class code 3632) is a type of business insurance that helps protect machine shop employees and owners when a work-related injury or illness occurs. It is designed to pay for medical care and a portion of lost wages for covered employees who are hurt or become ill because of their job.

Machine shops often use cutting tools, presses, lathes, mills, and other heavy equipment. These operations can create higher risks of cuts, crush injuries, burns, and repetitive motion injuries. Workers compensation coverage is meant to respond to these kinds of job-related incidents, subject to the terms and limits of the policy and state law.

Who needs it

Most machine shops that have employees will either be required by state law or strongly encouraged by contracts and clients to carry workers compensation insurance. This can include:

  • Small job shops and custom fabrication shops
  • Production machine shops and CNC shops
  • Prototype and R&D machining operations
  • Shops that do turning, milling, grinding, drilling, or welding
  • Machine shops working as subcontractors for larger manufacturers

Even if you have only a few employees, a single serious injury could be expensive. Workers compensation coverage helps shift much of that financial risk from the business to the insurer, within policy limits.

What it typically covers

While every policy is different, and coverage can vary by insurer and state, machine shops workers compensation (class code 3632) commonly includes:

  • Medical expenses for covered work-related injuries and illnesses, such as doctor visits, hospital stays, surgery, physical therapy, and prescriptions.
  • Partial wage replacement when an employee cannot work because of a covered injury or illness.
  • Rehabilitation services that may help an injured worker return to work, such as occupational or vocational rehab, where included by the policy.
  • Benefits for permanent impairment if an employee suffers a qualifying permanent injury, as defined by applicable law and the policy.
  • Death benefits for dependents of an employee who dies from a covered work-related injury or illness, where provided.

The goal is to help injured employees get needed care and income support while also helping protect the business from many direct costs of workplace injuries, subject to policy terms and exclusions.

Common exclusions and limitations

Workers compensation does not cover every situation. Typical exclusions and limitations can include:

  • Injuries that are not related to work or that occur off the job
  • Intentional self-inflicted injuries
  • Injuries that happen while an employee is under the influence of drugs or alcohol, where allowed by law
  • Injuries that occur while committing certain criminal acts
  • Independent contractors or subcontractors who are not classified as employees, unless specifically included

Policies may also have reporting requirements, safety obligations, and other conditions. Actual exclusions and limits depend on the insurer, the policy language, and state regulations.

Factors that influence cost

The cost of machine shops workers compensation insurance (class code 3632) varies by business. Common factors that can affect your premium include:

  • Payroll and number of employees – Higher total payroll usually means higher premium.
  • Job duties and operations – The type of machining, use of automation, and exposure to cutting, welding, or heavy lifting can matter.
  • Claims history – A history of frequent or severe claims can increase costs, while a strong safety record may help lower them.
  • Safety programs – Formal training, machine guarding, PPE use, and written safety procedures are often viewed favorably.
  • State and location – Each state has its own rules and rating environment, which can influence premiums.

Only a licensed insurance professional can provide an actual quote based on your specific operations and state requirements.

Proof of insurance and compliance

Many states require employers with one or more employees to carry workers compensation insurance, but the details vary widely. Machine shops may also need to show proof of coverage to:

  • Secure contracts with manufacturers or larger clients
  • Work on certain jobsites or in shared facilities
  • Meet landlord or lease requirements

Proof of insurance is usually provided in the form of a certificate of insurance (COI). This document shows that your workers compensation policy is in force as of the date issued, subject to the terms and conditions of the policy. For exact compliance rules, check your state’s workers compensation agency or speak with a licensed insurance professional.

How to get a quote

To request a workers compensation quote for your machine shop (class code 3632), be prepared to share details about your operations, estimated annual payroll by job role, number of employees, and any prior claims. This information helps an insurer understand your risk and tailor coverage options.

Get a workers compensation quote for your machine shop to compare options for your business.

Frequently Asked Questions

Is workers compensation required for all machine shops?

Most states require employers with at least one or a few employees to carry workers compensation, but the exact thresholds and rules vary. Check your state’s requirements or speak with a licensed insurance professional for guidance.

Does workers compensation cover injuries from operating CNC machines?

If the injury arises out of and in the course of employment, workers compensation may apply, subject to policy terms and state law. This can include injuries from CNC machines, manual mills, lathes, and other shop equipment.

Are shop owners covered under a workers compensation policy?

Owners, partners, and officers may be able to be included or excluded depending on state rules and how the policy is set up. Many states allow owners to opt in or opt out of coverage.

What information do I need to get a workers compensation quote for my machine shop?

Insurers typically ask for your business location, description of operations, estimated annual payroll by job type, number of employees, and any prior workers compensation claims or losses.

Can safety programs help lower my machine shop workers compensation costs?

Strong safety practices, such as machine guarding, PPE requirements, lockout/tagout procedures, and regular training, may help reduce the frequency and severity of injuries, which can positively affect your long-term workers compensation costs.

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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