For the Property & Casualty exam, workers' compensation is tested both as a policy product and as a state-mandated system. Massachusetts runs a competitive workers' comp market—coverage is bought from private insurers rather than a monopoly state fund—and claims are administered by the Department of Industrial Accidents (DIA). This guide reviews how the workers' comp policy is built and rated, then anchors the concepts in Massachusetts-specific rules.

The workers' compensation policy (national structure)

The standard workers' comp policy has two main coverage parts:

• Part One – Workers' Compensation. The insurer pays all benefits the state's comp law requires—medical, disability income, and death benefits. There is no dollar limit because the statute, not the policy, sets the amounts.
• Part Two – Employers Liability. Covers the employer for work-injury suits that fall outside the comp statute (for example, certain third-party-over actions). This part does carry limits.

Supporting elements include Part Three – Other States Insurance (extends coverage to listed states) and the information page listing states, class codes, and estimated payrolls used to price the policy.

Rating and premium are driven by:

• Classification codes matched to the type of work.
• Payroll (per $100) as the exposure base.
• The experience modification factor (mod), which raises or lowers premium based on the employer's loss history.
• A premium audit at the end of the term to reconcile estimated payroll against actual.

Massachusetts is a competitive market

Massachusetts is not a monopolistic state-fund state. Employers buy workers' comp from private licensed insurers in a competitive market (or qualify to self-insure with state approval). The rating organization commonly associated with Massachusetts workers' comp is the Workers' Compensation Rating and Inspection Bureau of Massachusetts (WCRIBMA), which develops loss costs, classifications, and experience-rating for DOI review—verify the bureau name for your exam, but know Massachusetts uses its own state rating bureau rather than relying solely on NCCI.

Mandatory coverage in Massachusetts

Coverage is mandatory for essentially every employer with one or more employees (including most part-time workers). An employer can satisfy the requirement by:

• Buying a policy from a private licensed insurer, or
• Self-insuring with approval from the DIA.

An employer that illegally goes uninsured can be issued a stop-work order by the DIA, faces fines and personal liability, and loses key litigation protections. Massachusetts maintains a fund (commonly the *Workers' Compensation Trust Fund) that can pay benefits to employees of illegally uninsured employers and then pursue the employer—verify the exact mechanism.

The Department of Industrial Accidents

Claims are administered by the Department of Industrial Accidents (DIA), not the DOI. The DIA handles dispute resolution through a structured process—conciliation, conference, hearing, and review before an administrative judge/board—so when a question asks who runs comp claims in Massachusetts, the answer is the DIA.

Benefit types (conceptually)

Part One funds the statutory benefits. Conceptually, Massachusetts pays the standard categories:

Wage-loss benefits are based on a percentage of the average weekly wage (AWW), subject to state maximums and minimums tied to the statewide average weekly wage and adjusted over time, and a waiting period generally applies before wage-loss benefits begin (with retroactive payment if disability lasts long enough)—verify the current day counts.

Who may be exempt

Most workers are covered, but Massachusetts recognizes limited exemptions and elections:

• Sole proprietors and partners (owners, not employees—may elect to be covered).
• Certain corporate officers / LLC members who qualify to opt out.
• Domestic servants below statutory hour thresholds and some casual labor.
• Federal employees, railroad workers (FELA), and maritime/longshore workers (covered by federal acts instead).

Key Massachusetts numbers to memorize

Common exam traps

• Calling Massachusetts a monopoly state-fund state. It is competitive—private carriers and approved self-insurance.
• Naming the DOI as the claims agency. Claims run through the DIA.
• Confusing Part One and Part Two. Part One pays statutory benefits with no limit; Part Two (employers liability) has dollar limits.
• Putting a waiting period on medical care. Only wage-loss benefits have a waiting period; medical generally has none.
• Overstating exemptions. Owners may elect coverage, but employees—including most part-timers—are covered.
• Quoting a fixed maximum benefit. Wage-loss caps are tied to the statewide average wage and change over time.

Quick recap

The workers' compensation policy pairs Part One (unlimited statutory benefits) with Part Two (employers liability, with limits) and is priced on payroll per $100, class code, and experience mod, reconciled by premium audit. Massachusetts runs a competitive market—employers buy from private insurers or qualify to self-insure—with rates developed through the state rating bureau (WCRIBMA) and claims administered by the Department of Industrial Accidents (DIA), not the DOI. Coverage is mandatory for employers with one or more employees, and benefits cover no-deductible medical, temporary/permanent and total/partial wage loss based on the average weekly wage, plus scheduled-loss, disfigurement, and death benefits. Remember the two policy parts, the competitive market, and the DIA, and the Massachusetts workers' comp questions become reliable points.