Second Injury Fund

A second injury fund (also called a subsequent injury fund) solves an old workers' compensation problem: an employer who hires someone with a prior impairment — say, the loss of an eye or a bad knee — could end up liable for a total disability if a later, otherwise minor workplace injury combined with the old condition to leave the worker fully disabled. Left unaddressed, that risk discouraged businesses from hiring people who already had disabilities. The fund fixes the incentive by having the state pay the portion of the disability attributable to the combination, while the employer's insurer pays only for the second injury standing alone.

Mechanically, the employer's state fund or private comp carrier pays the full benefit to the injured worker, then seeks reimbursement from the second injury fund for the excess disability caused by the pre-existing condition. The fund is typically financed by assessments or surcharges spread across all workers' comp insurers in the state. Importantly, many states froze or closed their second injury funds to new claims after the Americans with Disabilities Act of 1990 addressed the underlying hiring-discrimination concern directly, so whether the fund applies depends heavily on the state and the date of injury — a detail that affects both claims handling and the surcharge line on a premium bill.

For a small-business buyer the practical takeaway is twofold. First, if you operate in a state that still has an active fund, a combined-disability claim may not hit your loss history as hard as the full benefit suggests, because the excess is reimbursed — which can matter to your experience modifier over time. Second, in states with closed funds, the residual assessments may still appear as a surcharge even though no new recoveries are available. Employers should ask their carrier how second injury reimbursements are reflected in loss runs, since the reimbursed portion should not be counted against the account's experience rating.