Wesco Insurance Company, part of the AmTrust Financial Group, has filed a new Excess Workers’ Compensation program in California with a requested effective date of February 16, 2026. The filing is currently pending state review.

The program is designed for qualified self-insured employers and reimburses losses above a specified retention, allowing organizations to maintain predictable risk levels while meeting statutory financial responsibility requirements. The minimum self-insured retention is $250,000, with higher levels available based on risk characteristics.

Premiums will be determined individually for each account using actuarial analysis that considers expected excess losses, retention levels, historical loss experience, operational hazards, and expense loads. The California Department of Insurance noted that rates must be formally filed, rather than negotiated separately between the carrier and insured.

The filing applies to a program affecting 24 policyholders. Wesco reported $60.1 million in California workers’ compensation premium and $2.14 billion in total premium across all lines and states.

The excess coverage functions similarly to reinsurance for self-insured employers, providing protection against catastrophic losses while allowing them to retain primary claims responsibility.