Massachusetts · Workers’ compensation

Massachusetts Workers’ Compensation Notice and Claim Deadlines

4 years from when the employee first became aware of the causal relationship between disability and employment; death claims no later than 4 years after death.

2 rules checked against governing sourcesSources checked through Jul 3, 2026Inspect the coverage gate

Answer first, sources attached

The two state deadlines to check first

Employer notice and claim filing are distinct steps in many states. Both can depend on the injury type, knowledge date, treatment, or benefit history.

Agency or petition filing

Claim filing deadline

4 years from when the employee first became aware of the causal relationship between disability and employment; death claims no later than 4 years after death.

Mass. Gen. Laws ch. 152, Sec. 41.

Verified Jul 3, 2026 · Next review by Jul 3, 2027

Initial notice

Employer notice rule

Notice to the insurer or insured is required as soon as practicable after the injury; the cited rule does not state a fixed day count.

Mass. Gen. Laws ch. 152, Sec. 41.

Verified Jul 3, 2026 · Next review by Jul 3, 2027

What changes the answer

The statewide rule is the starting point

  • Accident versus occupational diseaseThe trigger may change when an injury develops over time.
  • Knowledge and manifestationSome rules turn on when the worker knew the condition was work-related.
  • Treatment and benefit paymentsEmployer-furnished treatment or indemnity payments can affect filing time.
  • Coverage and exceptionsEmployer status, actual knowledge, prejudice, and statutory exceptions may change the result.

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This page reports source-linked state rules and review dates. It does not calculate a deadline, determine eligibility, select a procedure, value a claim, or apply law to an individual situation. Verify the cited authority, local procedure, and current law before relying on a rule.