Massachusetts Workers' Comp Insurance for Light Manufacturing & Machine Shops

Massachusetts requires workers' compensation coverage no matter how many employees a business has or how many hours they work; there is no minimum headcount exemption for most employers. A specific carve-out applies to domestic workers, who must work at least 16 hours a week before coverage is required for them. See Mass.gov's workers' compensation insurance requirements page.

Common codes for this work include 3632 Machine Shop; 2812 Cabinet Shop (Power Machinery); 3066 Sheet Metal Shop; 3179 Electrical Apparatus Manufacturing; 3681 Electronics / Telecom Device Manufacturing; 4299 Printing; 2501 Clothing Manufacturing; 4511 Analytical Laboratory / Assaying. Massachusetts maintains its own classification system (WCRIBMA) rather than NCCI codes. The codes below are NCCI reference codes; your Massachusetts classification may carry a different number, and we match it during quoting.

LLC members, LLP partners, and sole proprietors are not required to carry coverage on themselves, though this exemption never extends to any employees they hire, who must still be covered. Corporate officers who own at least 25% of the corporation can request an exemption for themselves using the state's affidavit of exemption, but again, this doesn't exempt the corporation's actual employees. Because the exemption thresholds differ by entity type (a flat exclusion for LLC members/partners/sole proprietors versus a 25%-ownership test for corporate officers), it's worth confirming which rule fits a given ownership structure before assuming exemption applies.

An employer without required coverage can be issued a stop-work order that halts all business operations; paying $100 per day of noncompliance can avoid the order taking effect initially, but that daily penalty rises to $250 per day once the violation is confirmed after a hearing. Separately, failing to provide required coverage is a criminal offense carrying a fine of up to $1,500, up to one year of imprisonment, or both, with a corporation's president or treasurer personally liable; a repeat violation after notice is treated as an additional offense with its own fines and imprisonment. Noncompliant employers can also lose business licenses and permits, face a three-year debarment from state and municipal contracts, and have liens placed against their property for unpaid penalties (M.G.L. c. 152, § 25C).

Price is driven by payroll in each class code, the Massachusetts rates filed for those codes, your claims history (experience modification), and underwriting factors such as the specific manufacturing process or product being produced; level of machine guarding and documented lockout/tagout procedures; amount of manual materials handling versus automated processes. We compare carriers so you can see what you qualify for.

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No — classifications are built around the specific product or process, so a machine shop, a cabinet shop, and an electronics manufacturer are each rated differently even though they're all considered light manufacturing.

Office and clerical staff working in a physically separated area away from the production floor may qualify for a standard clerical exception, which is typically rated lower than the manufacturing classification covering shop-floor work.

Payroll may need to be reported under more than one classification when a facility genuinely runs distinct processes — for example, machining and sheet-metal fabrication — with each process rated under its own applicable code.

Yes. Massachusetts requires coverage regardless of employee count or hours worked, with the only hours-based exception applying to domestic workers.

No. LLC members, LLP partners, and sole proprietors are exempt from coverage on themselves, though any employees they hire must still be covered.