Key Takeaways

  • Massachusetts requires workers' compensation for businesses with employees
  • Workers' comp provides no-fault coverage for work-related injuries and illnesses
  • Coverage includes medical expenses, lost wages, disability, and death benefits
  • Employers cannot sue employers in return for guaranteed benefits
  • Premiums are based on payroll, classification codes, and experience modification
Last updated: January 2026

Workers' Compensation Insurance

Workers' compensation insurance provides medical and wage replacement benefits to employees injured on the job, regardless of fault.

Massachusetts Workers' Compensation Law

Mandatory Coverage

Massachusetts requires workers' compensation for:

Business TypeRequirement
CorporationsRequired if any employees
PartnershipsRequired if any non-partner employees
Sole ProprietorsRequired if any employees
Part-time/SeasonalCoverage required for all employees

Penalties for Non-Compliance:

  • Fines up to $250 per day
  • Stop work orders
  • Criminal penalties
  • Personal liability for injuries

Exempt Workers

Limited exemptions in Massachusetts:

  • Sole proprietors (for themselves)
  • Partners (for themselves)
  • Corporate officers (can elect to opt out)
  • Real estate brokers
  • Certain agricultural workers

Exam Tip: Massachusetts requires workers' comp for virtually all employees. Corporate officers can opt out, but most employees must be covered.

Coverage Provided

Part One: Workers' Compensation

Medical Benefits:

  • All reasonable and necessary medical treatment
  • Doctor visits, hospital stays, surgery
  • Prescription medications
  • Physical therapy and rehabilitation
  • No dollar limit on medical expenses

Disability Benefits:

Benefit TypeCoverage
Temporary Total Disability60% of average weekly wage while unable to work
Temporary Partial Disability60% of wage loss while working reduced capacity
Permanent Total DisabilityLifetime benefits for permanent inability to work
Permanent Partial DisabilityScheduled benefits for loss of body parts/functions

Death Benefits:

  • Burial expenses (up to specified amount)
  • Benefits to dependents (spouse, children)
  • Typically two-thirds of deceased's average weekly wage

Part Two: Employer's Liability

Coverage:

  • Protects employer against lawsuits by employees or family members
  • Covers legal defense costs
  • Typical limits: $100,000/$500,000/$100,000

When Applicable:

  • Third-party over actions
  • Dual capacity claims
  • Consequential injury claims (spouse/family suing)

Exam Tip: Part One is workers' comp benefits (medical and wage replacement). Part Two is employer's liability covering lawsuits not barred by workers' comp.

The Workers' Compensation Bargain

No-Fault System

Employee Gives Up:

  • Right to sue employer for negligence
  • Right to pain and suffering damages
  • Right to punitive damages

Employee Receives:

  • Guaranteed benefits regardless of fault
  • Prompt payment without proving negligence
  • Medical care at no cost
  • Partial wage replacement

Employer Benefits:

  • Protection from unlimited liability
  • No expensive lawsuits for negligence
  • Predictable costs through insurance
  • Immunity from most employee lawsuits

Premium Calculation

Classification Codes

Workers are classified by job duties:

  • Each job type has a classification code
  • Codes based on injury risk for that occupation
  • Higher risk = higher rate per $100 of payroll

Example Codes:

  • Office clerical: Low risk, low rate
  • Construction workers: High risk, high rate
  • Healthcare workers: Moderate risk, moderate rate

Premium Formula

Basic Premium = (Payroll ÷ 100) × Classification Rate × Experience Mod

Example:

  • Annual Payroll: $500,000
  • Classification Rate: $2.50 per $100
  • Experience Mod: 1.10 (10% surcharge for poor loss history)
  • Premium = ($500,000 ÷ 100) × $2.50 × 1.10 = $13,750

Experience Modification (Mod)

Experience Mod - Factor comparing employer's loss history to industry average

Mod ValueMeaningEffect on Premium
1.00Average loss historyNo adjustment
0.75Better than average (25% discount)25% lower premium
1.25Worse than average (25% surcharge)25% higher premium

Factors Affecting Mod:

  • Claim frequency (number of claims)
  • Claim severity (dollar amount of claims)
  • Payroll size
  • Industry comparison

Exam Tip: Experience modification adjusts premiums based on loss history. A mod below 1.00 provides a discount; above 1.00 adds a surcharge.

Massachusetts Department of Industrial Accidents (DIA)

Role of the DIA

The Department of Industrial Accidents (DIA) oversees workers' compensation in Massachusetts:

Functions:

  • Adjudicate disputed claims
  • Approve claim settlements
  • Oversee medical treatment providers
  • Monitor compliance
  • Provide information to workers and employers

Dispute Resolution

Process:

  1. Conference: Informal dispute resolution
  2. Hearing: Formal hearing before administrative judge
  3. Reviewing Board: Appeal of judge's decision
  4. Appeals Court: Final appeal to Massachusetts courts

Return to Work Programs

Massachusetts encourages return to work:

Benefits of RTW Programs:

  • Reduces claim costs
  • Helps employees recover faster
  • Maintains worker skills
  • Improves employee morale
  • May improve experience mod

Types of Modified Work:

  • Light duty assignments
  • Reduced hours
  • Temporary reassignment
  • Gradual return to full duties
Test Your Knowledge

What percentage of average weekly wage do Massachusetts workers receive for temporary total disability?

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Test Your Knowledge

What is the "workers' compensation bargain"?

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Test Your Knowledge

What does an experience modification of 0.85 mean?

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Test Your Knowledge

Which Massachusetts agency oversees workers' compensation disputes?

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