Workers' comp settlements and the employer's role

Most workers' comp claims never settle; they close when the employee returns to work and treatment ends. When one does settle, the carrier and the injured worker agree to a payment in exchange for closing some or all of the claim, usually with approval from a judge or state agency. The employer rarely signs the settlement, but its facts, deductible and mod are affected. Settlement law is state law and differs widely, and when the worker is on or near Medicare, a federal rule about protecting Medicare's interests also applies.

Types of settlement

Terminology varies by state, but the building blocks are:

Whether future medical can be settled at all is a state-law question. In California, a compromise and release can close medical care; in other states the statute or agency limits releases of lifetime medical benefits. Florida allows settlements with court approval. Use the workers' comp and benefits requirements by state to see the settlement rules in each state where you have employees, and treat any general description (including this one) as a starting point.

Who decides

Control of a claim belongs to the insurer under the policy, and the employer's usual rights are limited to being informed. The decision turns on the carrier's evaluation: the reserves set, the likelihood of litigation, the expected medical, the worker's restrictions, whether the job is still available and the cost of continued benefits. The injured worker typically needs a lawyer in a contested case; the state agency or judge must usually approve that the settlement is in the worker's interest.

Where the employer takes part:

• Self-insured and large-deductible employers. If the employer funds the first dollars under a large deductible program, the carrier needs its consent or at least coordination, and the settlement comes out of the employer's pocket up to the deductible. See large deductible workers' comp programs: how they work and what they cost.
• Retrospective rating. A retrospective rating plan adjusts premium to actual losses, so a settlement amount affects the final premium.
• Group captives and self-insureds. Any settlement authority comes from the program agreement.
• Guaranteed-cost policies. Most small employers have little say in whether a claim settles, but can give the adjuster facts about the claim and the job.

What settling does to your mod

Experience rating uses the incurred losses on claims in the experience period: paid amounts plus the carrier's reserve on open claims. A settlement replaces an uncertain reserve with a fixed number, which can be lower or higher than the reserve, and it ends further reserve movement on that claim. Each claim's value in the mod is also capped by a per-claim limit in the rating plan. Timing matters, so ask your broker how a pending settlement lands in the next mod; see The experience modification rate (EMR) explained.

Medicare Secondary Payer and the set-aside

Medicare is supposed to be a secondary payer when workers' comp is responsible for an injury. Under the Medicare Secondary Payer Act (42 U.S.C. 1395y(b)(2)), a settlement that releases future medical benefits must consider Medicare's interest. The usual tool is a Workers' Compensation Medicare Set-Aside Arrangement (WCMSA): a portion of the settlement set aside to pay for future injury-related care that Medicare would otherwise cover.

CMS operates a review process, with these workload thresholds from its WCMSA Reference Guide:

• Medicare beneficiary: CMS will review a proposed WCMSA if the claimant is a Medicare beneficiary and the total settlement is greater than $25,000.
• Reasonable expectation of Medicare within 30 months: CMS will review if the claimant has a reasonable expectation of Medicare enrollment within 30 months of the settlement date and the anticipated total settlement is greater than $250,000. Reasonable expectation includes a pending Social Security Disability application, an SSDI denial being appealed, age 62 years and 6 months, or end-stage renal disease.

CMS stresses that these are workload thresholds, not safe harbors. Submission is voluntary, with no statute or regulation requiring it, though it is a recommended process. CMS does not issue a letter confirming that a settlement below the threshold needs no set-aside, and it can change the thresholds. Effective July 17, 2025, CMS no longer accepts or reviews proposals with a zero-dollar allocation. These are CMS's current rules as stated at its WCMSA page; verify them before you settle.

For employers, the practical point is that the carrier and counsel decide whether to use a set-aside, and the set-aside is funded out of the settlement itself. A primary payer that fails to protect Medicare's interest can face recovery by Medicare, and insurers have Medicare Section 111 reporting duties. If you are self-insured or have a large deductible, treat this as your problem, with counsel involved.

Settlement and the employee's job

A settlement ends or limits benefits, but it does not decide employment:

• Reinstatement. The employee is not always leaving. Some settlements are made with the worker back on the job.
• Resignation clauses. Some settlements are paired with a separate resignation or release of employment claims. A release of employment claims has its own legal rules, and an ADA or FMLA claim (Workers' comp, the ADA and FMLA: how they overlap) is not waived by a workers' comp settlement unless it was specifically released. Take this to employment counsel.
• Retaliation. An employer may not fire or discipline an employee for filing a claim or for settling.

Hypothetical example

Say a 45-year-old employee at a 50-employee fabricator has a back injury with a 10% permanent impairment rating and is on Social Security Disability review. Her lawyer and the carrier agree on a lump sum that includes future medical. Because she applied for SSDI, the parties treat Medicare enrollment as a reasonable expectation, and, since the settlement exceeds $250,000, they submit a proposed set-aside to CMS. The employer, which carries a guaranteed-cost policy, is notified when the claim closes, and the employer's next mod shows the claim's paid amount. In a state that bars closing medical, the same deal would be indemnity-only, with medical staying open.

Key takeaways

• Settlement rules, including whether future medical can be closed and who approves, are state law; check each of your states.
• Employers rarely control the decision, except under large-deductible, self-insured and some retro plans.
• CMS reviews a WCMSA where the claimant is on Medicare and the settlement exceeds $25,000, or Medicare is reasonably expected within 30 months and the settlement exceeds $250,000; the thresholds are not safe harbors and review is voluntary.
• A settlement affects your experience mod through the claim's incurred value.
• Settlement of a comp claim does not itself release ADA, FMLA or retaliation claims.