Massachusetts SJC Orders DOI to Justify Its 14.6% Workers' Comp Rate Cut

The Massachusetts Supreme Judicial Court ruled July 6, 2026, that the Division of Insurance must provide a "specific, reasoned explanation" for ordering a workers' compensation rate decrease of 14.6 percent — nearly double what the state's rating bureau had proposed — remanding the rate proceeding back to the regulator. The decision in Workers' Compensation Rating and Inspection Bureau of Massachusetts v. Commissioner of Insurance (SJC-13807) clarifies the procedural discipline that constrains the commissioner's authority under G.L. c. 152, §53A when the prescribed rate departs substantially from a bureau filing.

Massachusetts operates a file-and-approve rate structure. The Workers' Compensation Rating and Inspection Bureau of Massachusetts (WCRIB) files proposed rate revisions for the voluntary market, and the Commissioner of Insurance may approve, reject, or order a rate that differs from the filed proposal. The governing statute requires that rates not be excessive, inadequate, or unfairly discriminatory, and directs the commissioner to assess whether proposed rates fall within a "range of reasonableness."

Two disputed rate cycles

The litigation arose from back-to-back rate decisions that the WCRIB challenged as inadequately supported. In December 2023, the WCRIB filed for rates effective July 1, 2024, proposing a 7.6 percent decrease. The Commissioner of Insurance disapproved the filing and ordered a 14.6 percent decrease instead, issuing Rate Decision R2023-03 on June 21, 2024. The commissioner objected to WCRIB's use of a two-year lookback window for estimating indemnity paid losses, the bureau's underwriting profit methodology, and the bureau's choice of data source for class code 9033 — the occupational classification that primarily covers public housing authority employees.

The following year, in November 2024, WCRIB filed for rates effective July 1, 2025, this time proposing a 7.1 percent increase. The commissioner again rejected the bureau's proposal, leaving the July 2024 rate — reflecting the 14.6 percent cut — unchanged, under Rate Decision R2024-01 issued May 2025.

The SJC's holding

The court affirmed that existing rates were excessive and that the commissioner had reasonable grounds for rejecting the WCRIB's filed proposals. The commissioner was entitled to find WCRIB's two-year data window and underwriting profit methodology inadequate, including in light of anomalous data from the COVID-19 pandemic period, and the court did not disturb that finding.

The SJC drew a distinction, however, between the authority to reject a filed rate and the authority to prescribe a different one. Once the commissioner determines that the filed rate is excessive and orders a specific alternative rate, the commissioner must supply a "specific, reasoned explanation" for why that particular figure — 14.6 percent, not 7.6 percent or some other number — falls within the statutory range of reasonableness. Rate Decision R2023-03 did not provide that explanation, and the court remanded the 2024 rate question to the Division of Insurance to supply it.

On class code 9033, the court found the commissioner had directed the WCRIB to use an alternative data source for computing rates applicable to public housing authority employees without adequately addressing legitimate questions about the reliability of that substitute data. The class code 9033 methodology is on remand alongside the rate-level question.

The court's remand does not alter the rates currently in effect; the 14.6 percent reduced rate remains operative while the Division of Insurance conducts the remand proceeding.