The workers’ comp check arrives, and then it sinks in. It covers some medical bills and a fraction of your lost wages. It doesn’t cover the pain that keeps you up at night, the income your family has lost, or the full cost of a long recovery. At that point, a reasonable question follows: who else on that job site might be responsible?
The answer is almost never as simple as “any company that isn’t your direct employer.” Missouri law draws careful lines around who can be sued, who is legally shielded, and under what conditions a second claim can run alongside a workers’ comp case. At Sedey Harper Westhoff, we’ve spent over 40 years representing injured workers and their families against corporations and insurers, and those lines matter enormously to the outcome of a case.
What Workers’ Compensation Covers & Where It Falls Short
Missouri’s workers’ compensation system operates on a no-fault basis. An injured worker doesn’t need to prove that an employer acted carelessly to receive benefits. Medical treatment, a portion of lost wages, and disability payments are all available without that showing.
The trade-off is that workers’ comp is generally the exclusive remedy against a direct employer. Under RSMo 287.120, an employer who provides workers’ comp coverage is released from most other civil liability, with limited exceptions for affirmative negligent acts. That exclusivity means no separate lawsuit against the employer for pain and suffering, emotional distress, or the full value of future earning capacity. Those categories of loss simply don’t exist inside the workers’ comp system, which is precisely why identifying a responsible third party can change a case entirely.
The Statutory Employer Trap
The most common mistake injured workers make is assuming the general contractor is automatically fair game for a lawsuit because they aren’t the direct employer. Missouri law doesn’t work that way. Under RSMo 287.040, a general contractor can become what the law calls a “statutory employer” of a subcontractor’s workers, and once that status applies, the same exclusive remedy rule that protects a direct employer protects the general contractor too.
The statutory employer test has three elements: the work is performed under contract, the injury occurs on or about the premises of the statutory employer, and the work falls within the usual course of the statutory employer’s business. In State ex rel. MW Builders, Inc. v. Midkiff, the Missouri Supreme Court confirmed that a general contractor meeting all three elements is immune from a common-law lawsuit brought by a subcontractor’s injured worker. That worker’s remedy is limited to workers’ comp benefits, even though the general contractor is a legally separate company. Whether the trap applies depends on the actual contract documents and the nature of the work, not just who was on site the day of the accident.
When General Contractors Lose Immunity: The Retained Control Rule
Even when statutory employer immunity doesn’t apply, a general contractor doesn’t automatically owe a duty of care to every worker on the site. Missouri courts start from a no-duty baseline: a general contractor who delegates work to a subcontractor isn’t ordinarily responsible for how that subcontractor manages safety on its portion of the job.
A duty can arise under the retained control doctrine, but the bar is specific. The contract or the general contractor’s actual conduct must show control over the particular work activity that caused the injury. Not merely a general supervisory role, a right to inspect finished work, or authority to reject deficient results. A clause giving the general contractor the right to stop unsafe work doesn’t automatically satisfy retained control if it wasn’t exercised in a way connected to the injury.
Missouri courts also recognize a narrow peculiar risk exception, which can create liability when the contracted work carries dangers that are exceptional and inherent to the task itself. Courts apply this exception sparingly, and most ordinary construction hazards don’t meet the threshold. Whether retained control or peculiar risk applies is a fact-intensive question that turns on contract language, site supervision records, and how the job actually ran day to day.
Who Can Actually Be Held Liable on a St. Louis Job Site
Once you work past the statutory employer question and the retained control analysis, several parties can remain as valid defendants in a St. Louis construction injury case.
Other Subcontractors
A subcontractor with no statutory or contractual relationship that triggers the exclusive remedy rule can be sued directly for negligence. If a crew from a different trade dropped materials from scaffolding, left a trench unshored, or created a hazard that injured a worker on an adjacent part of the site, that subcontractor isn’t shielded by workers’ comp law and can face a civil lawsuit for full damages.
Equipment & Materials Manufacturers
Missouri’s strict product liability doctrine is codified at RSMo 537.760. Under this framework, an injured worker doesn’t need to prove a manufacturer was careless. If a piece of equipment or a building material was defective and that defect caused the injury, the manufacturer can be held liable regardless of how carefully it ran its operations. This matters on construction sites, where workers regularly depend on scaffolding, power tools, lifting equipment, and chemical compounds from third-party suppliers.
Property Owners
A property owner who retains meaningful control over a job site rather than fully relinquishing it to an independent contractor may owe a duty of care to workers on the premises. If the owner knew of a hazardous condition and had the authority and opportunity to address it, that owner can share in liability even if day-to-day work was delegated. This is especially relevant in renovation or multi-phase construction projects where an owner stays involved throughout.
Pursuing Both Claims Without Losing Value
Missouri law permits an injured worker to collect workers’ comp benefits from the employer while simultaneously pursuing a third-party personal injury lawsuit against a responsible party. The two claims run on separate tracks, and collecting workers’ comp doesn’t forfeit the right to sue.
Missouri follows a pure comparative fault rule established in Gustafson v. Benda. A court assigns a percentage of fault to each party, including the injured worker if their own conduct contributed to the accident. The third party’s financial responsibility is reduced by the worker’s percentage, but the claim isn’t eliminated even if the worker is found to bear more than half the fault. This is a more favorable standard than the contributory negligence rule that still applies in some other states.
There is one coordination issue that must be managed carefully. Under RSMo 287.150, a workers’ comp insurer that has paid benefits holds a subrogation lien, which is a legal right to recover a portion of what it paid from any third-party settlement or verdict. The lien doesn’t cancel the value of a third-party claim, but it does affect how the net recovery is structured. Failing to account for it during settlement negotiations can leave a significant portion of a recovery in the insurer’s pocket rather than the injured worker’s.
Deadlines & Where Missouri Construction Claims Get Decided
Two separate limitation periods apply to the same construction accident, and neither waits for the other.
Third-Party Personal Injury Lawsuits
A third-party personal injury lawsuit must generally be filed within five years of the accident date under RSMo 516.120. If the accident was fatal, the family’s wrongful death claim must be filed within three years under RSMo 537.100.
Workers’ Compensation Claims
The workers’ comp claim runs on a shorter, separate schedule. Missouri law requires a claim filed with the Missouri Division of Workers’ Compensation within two years of the injury date. Missing that window can forfeit comp benefits entirely, which also affects any subrogation calculation tied to a third-party case.
For workers injured in the St. Louis area, workers’ comp hearings covering the City of St. Louis, St. Louis County, and St. Charles County are docketed through the Division’s office in Chesterfield, Missouri. Job site safety investigations and multi-employer worksite citations are handled through the OSHA St. Louis Area Office at the Robert A. Young Federal Building. OSHA inspection records, citations, and employer responses can be critical evidence in a third-party negligence case and are worth requesting early.
Finding the Real Third Party Takes More Than a Job Title
Knowing another company was on site the day you were hurt is a starting point, not a conclusion. Whether that company can be held liable depends on what the contracts say, who actually controlled the work, whether a product was defective, and whether the statutory employer doctrine insulates someone you assumed was a valid defendant. Getting this analysis wrong early can foreclose options that can’t be recovered later.
Sedey Harper Westhoff represents injured workers and their families, not insurers or corporations. If you were hurt on a St. Louis construction site and want to know whether a third-party claim is available in your case, call our team at (314) 819-0963 for a consultation.