You were injured at work, so you have a workers’ compensation claim.

Case closed, right?

Not always.

Sometimes a workplace injury involves someone other than your employer. A delivery driver could be hit by another motorist. A construction worker could be injured because another subcontractor created a dangerous condition. A piece of defective equipment could malfunction and seriously injure the person operating it.

In situations like these, the injured worker may potentially have two different legal claims arising from the same injury:

  1. A workers’ compensation claim connected to the workplace injury.
  2. A personal injury claim against a third party whose negligence contributed to the accident.

That’s an important distinction because workers’ compensation and personal injury claims work differently and may provide different types of benefits or compensation.

If you were injured while working in Missouri, understanding whether someone outside your employer may share responsibility could make a significant difference in your case.

First, What Does Workers’ Compensation Cover?

Missouri’s workers’ compensation system is designed to provide benefits to employees who suffer qualifying work-related injuries or occupational diseases.

Unlike a traditional personal injury lawsuit, workers’ compensation generally does not require an injured employee to prove that the employer was negligent.

Depending on the circumstances, available benefits may include:

  • Authorized medical treatment
  • Temporary disability benefits
  • Permanent partial disability benefits
  • Permanent total disability benefits

The tradeoff is that workers’ compensation is generally the employee’s remedy against an insured employer for a covered workplace injury.

In other words, an employee usually cannot simply sue the employer for ordinary negligence because a workplace accident occurred.

But that protection does not necessarily extend to everyone else who may have caused the accident.

And that is where third-party claims come in.

What Is a Third-Party Personal Injury Claim?

A third-party claim is a personal injury claim against someone other than the injured worker’s employer who may be legally responsible for the injury.

Imagine a construction site with workers employed by several different companies.

Your employer may be responsible for your workers’ compensation benefits.

But what if an employee of another subcontractor negligently operates equipment and injures you?

Or imagine you drive for work and another motorist runs a red light and hits your vehicle.

You may be injured while performing your job, which could potentially create a workers’ compensation claim.

But the negligent driver is not your employer.

That could create a separate personal injury claim.

The same injury can therefore involve two different legal systems.

Why Does Having Two Claims Matter?

Because workers’ compensation benefits and personal injury damages are not identical.

Workers’ compensation focuses on benefits established under the workers’ compensation system.

A third-party personal injury claim may allow recovery for additional damages that are not generally available in the same way through workers’ compensation.

Depending on the facts, a personal injury claim may include damages involving:

  • Medical expenses
  • Lost income
  • Future loss of earning capacity
  • Pain and suffering
  • Emotional distress
  • Permanent impairment
  • Scarring or disfigurement
  • Loss of enjoyment of life

That doesn’t mean an injured employee gets paid twice for every loss.

The interaction between workers’ compensation benefits and third-party recoveries is governed by Missouri law, including rules addressing reimbursement and subrogation.

But identifying a third-party claim can still be enormously important.

Example #1: A Delivery Driver Hit by Another Motorist

Suppose you’re making deliveries for your employer.

Another driver runs a stop sign and crashes into your vehicle.

You suffer a serious back injury.

Because you were performing your job when the collision occurred, you may have a workers’ compensation claim.

But the other motorist may also be liable for causing the crash.

That means the situation may involve:

Workers’ Compensation:
Benefits associated with your qualifying work-related injury.

Personal Injury Claim:
A claim against the negligent motorist and potentially the applicable auto insurer.

This is one of the clearest examples of how one accident may create two claims.

Example #2: A Construction Site Accident Caused by Another Contractor

Construction sites are complicated environments.

A single project may involve:

  • General contractors
  • Subcontractors
  • Electricians
  • Plumbers
  • Equipment operators
  • Delivery companies
  • Property owners
  • Equipment manufacturers

Now imagine you’re employed by a framing contractor.

An employee of an unrelated electrical subcontractor leaves equipment or materials in an unsafe location. You fall and suffer serious injuries.

Your employer’s workers’ compensation insurance may apply because you were injured in the course of your employment.

But depending on the facts, the other company or responsible party may also face potential liability.

Construction accidents are particularly important to investigate because multiple companies may control different parts of the job site.

Example #3: Defective Equipment Injures a Worker

Sometimes the dangerous party isn’t another person at the job site.

It’s the company that designed, manufactured, distributed, or maintained the equipment.

Workers rely on countless tools and machines, including:

  • Forklifts
  • Ladders
  • Scaffolding
  • Power tools
  • Cranes
  • Industrial machinery
  • Safety equipment
  • Vehicles

Suppose a machine unexpectedly fails because of a dangerous defect and causes a serious injury.

The worker may have a workers’ compensation claim because the injury occurred at work.

Depending on what caused the failure, there may also be a potential product liability claim involving a manufacturer or another responsible company.

These cases frequently require prompt investigation because the equipment itself may become critical evidence.

Example #4: A Worker Injured on Someone Else’s Property

Not everyone works at the same location every day.

Employees routinely travel to:

  • Customer homes
  • Construction sites
  • Commercial properties
  • Warehouses
  • Apartment buildings
  • Retail locations

Suppose you’re performing your job at another business and suffer an injury because of a dangerous property condition.

The workers’ compensation system may apply because you were working.

But the owner, manager, contractor, or another party responsible for the dangerous condition may potentially have separate liability depending on the circumstances.

Again, the critical question becomes:

Was someone outside the employer-employee relationship responsible for creating or failing to address the danger?

Example #5: A Work-Related Truck or Commercial Vehicle Accident

Work-related motor vehicle crashes can become especially complicated.

Imagine an employee traveling between job sites when a commercial truck causes a collision.

Potential claims could involve:

  • Workers’ compensation
  • The truck driver
  • The trucking company
  • Another contractor
  • Vehicle maintenance companies
  • Other responsible businesses

Serious commercial vehicle cases may involve multiple insurance policies and substantial evidence.

Identifying every potentially responsible party matters.

Who Counts as a Third Party?

Potential third parties vary significantly depending on the accident.

They may include:

  • Negligent motorists
  • General contractors
  • Subcontractors
  • Property owners
  • Equipment manufacturers
  • Product distributors
  • Maintenance contractors
  • Utility companies
  • Vendors
  • Other businesses working at the site

Simply being present when an accident happens does not automatically make someone liable.

A successful personal injury claim requires a legal basis for holding that party responsible.

That’s why investigation matters.

What About a Coworker?

This is where workplace injury law gets more complicated.

Not every person who contributed to an accident automatically becomes a viable third-party defendant.

Missouri law provides protections within the workers’ compensation system that can affect claims involving employers and coworkers.

Rather than assuming you can or cannot sue someone simply because that person works with you, the better approach is to have the circumstances reviewed individually.

The identity of the person, their relationship to the employer, what they were doing, and the exact conduct involved can all matter.

What Evidence Can Establish Third-Party Liability?

A workers’ compensation claim and a third-party personal injury case may begin with the same accident, but they require different evidence.

Workers’ compensation focuses heavily on whether the injury arose from employment and whether benefits are owed.

A third-party personal injury claim generally requires evidence establishing the third party’s legal responsibility.

Important evidence might include:

  • Accident reports
  • Police reports
  • Photographs
  • Video surveillance
  • Witness statements
  • Safety records
  • Contracts
  • Inspection records
  • Maintenance records
  • Vehicle data
  • Equipment records
  • OSHA investigation materials
  • Training documentation
  • Medical records

Some of that evidence can disappear quickly.

Video is overwritten.

Equipment is repaired.

Vehicles are moved.

Construction sites change.

Witnesses leave the job.

That’s one reason serious workplace accidents involving possible third parties should be investigated promptly.

Do I Still Report the Injury to My Employer?

Yes.

The possibility of a third-party claim does not eliminate the need to properly report a workplace injury.

Missouri workers should promptly notify their employer or supervisor when an injury occurs and follow applicable workplace reporting procedures.

You should also seek appropriate medical treatment.

Don’t avoid reporting a work injury because you think another company caused it.

These are potentially separate claims, and protecting one should not mean ignoring the other.

Can You Receive Workers’ Compensation While Pursuing a Third-Party Claim?

Potentially, yes.

This is one of the biggest advantages of understanding the distinction between the two claims.

Workers’ compensation may provide benefits while the third-party personal injury claim is still being investigated or litigated.

A third-party lawsuit can take considerable time.

Meanwhile, an injured worker may need medical treatment and may be unable to work.

Workers’ compensation and the personal injury claim can therefore play different roles during the recovery process.

But they do not exist in completely separate universes.

The money recovered through one claim can affect the other.

What Is Workers’ Compensation Subrogation?

Welcome to one of those legal words nobody wanted to learn until somebody got hurt.

Subrogation deals with reimbursement rights when workers’ compensation benefits are paid for an injury caused by a third party.

In simplified terms, if your employer or its workers’ compensation insurer paid benefits and you later recover money from a responsible third party for that same injury, the employer or insurer may have a legal interest in part of that recovery.

Missouri law contains specific rules governing how a third-party recovery is allocated.

Those calculations can involve:

  • Workers’ compensation benefits paid
  • The amount of the third-party recovery
  • Attorney fees
  • Litigation expenses
  • Comparative fault
  • Potential future workers’ compensation benefits

This is not an area where guessing is a good strategy.

Before resolving a third-party claim, the workers’ compensation side needs to be considered as well.

Does Subrogation Mean a Third-Party Case Isn’t Worth Pursuing?

Not necessarily.

This is a question injured workers understandably ask.

If the workers’ compensation insurer may recover some money, why pursue the third-party case at all?

Because a personal injury claim may include categories of damages unavailable through workers’ compensation, and the overall recovery may be significantly different.

The calculation depends on the facts of the case, however.

The important thing is to evaluate both claims together rather than viewing either one in isolation.

Why Coordination Between the Two Claims Matters

Imagine one lawyer handles the workers’ compensation case without knowing what is happening in the third-party case.

Meanwhile, another lawyer settles the personal injury case without considering the workers’ compensation lien.

Cue the legal equivalent of two people carrying a couch through different doors. 🛋️

These cases work better when the legal strategy accounts for both sides.

Questions may include:

  • How much has workers’ compensation paid?
  • Is there a valid subrogation interest?
  • Are future workers’ compensation benefits involved?
  • What insurance coverage is available from the third party?
  • Are there additional responsible parties?
  • How should settlement negotiations be coordinated?

The answer to one question can affect decisions in the other claim.

What If My Employer Doesn’t Have Workers’ Compensation Insurance?

That’s another situation requiring careful analysis.

Missouri requires covered employers to maintain workers’ compensation insurance or qualify as self-insured, subject to statutory rules and exceptions.

Construction employers in particular have specific coverage obligations.

When an employer required to carry workers’ compensation insurance fails to do so, Missouri law may provide injured employees with additional options.

Those cases should be reviewed promptly because they do not follow the ordinary insured-employer pattern.

Can Your Employer Fire You for Pursuing a Third-Party Claim?

Employment retaliation and workers’ compensation rights raise separate legal issues that depend heavily on the facts.

But an employee should not assume that seeking information about legal rights somehow cancels a legitimate workplace injury.

If you are concerned about retaliation, document what is happening and speak with an attorney before making decisions based on fear or assumptions.

What If the Third Party Blames Me for the Accident?

A third-party defendant or insurance company may attempt to argue that the injured worker shares responsibility.

Missouri’s comparative fault rules can potentially affect the amount recovered in a personal injury claim.

That is different from the basic no-fault structure of workers’ compensation.

So one workplace accident can potentially involve:

Workers’ compensation: where proving ordinary employer negligence generally is not the basis for benefits.

Third-party personal injury: where fault and negligence can become central issues.

That difference is another reason these claims require coordinated analysis.

What If I Already Started a Workers’ Compensation Claim?

That does not necessarily mean you’ve lost the ability to investigate third-party liability.

Many workers begin receiving treatment through workers’ compensation before realizing another company or person contributed to the accident.

But waiting can make evidence harder to obtain.

If you believe another person, contractor, driver, manufacturer, or company may have been responsible, raise the issue as early as possible.

What Should You Do After a Workplace Accident Involving Another Party?

  1. Report the Injury

Follow your employer’s workplace injury reporting procedures and keep documentation of the report.

  1. Get Medical Treatment

Describe accurately how the injury occurred and follow the treatment process.

  1. Identify Everyone Involved

Write down the names of companies, contractors, drivers, equipment manufacturers, property owners, or others connected to the accident.

  1. Photograph the Scene When Possible

Conditions at construction sites, warehouses, roads, and other workplaces can change quickly.

  1. Get Witness Information

Don’t assume the employer or insurance company will preserve every witness’s information for you.

  1. Preserve Equipment and Documents

If machinery, vehicles, tools, or safety equipment played a role, they may become important evidence.

  1. Be Careful With Insurance Statements

A third party’s liability insurer may contact you just as an auto insurance adjuster would after a traffic accident.

Don’t guess about fault, your injuries, or what happened.

  1. Ask Whether There May Be More Than One Claim

This is the question many injured workers don’t know to ask.

Could someone other than my employer be responsible?

Frequently Asked Questions About Workers’ Comp and Third-Party Claims

Can I receive workers’ compensation and sue someone else for the same accident?

Potentially. If someone other than your employer is legally responsible for a qualifying workplace injury, you may have both a workers’ compensation claim and a third-party personal injury claim.

Can I sue my employer after getting workers’ comp?

Generally, Missouri workers’ compensation provides the exclusive remedy against an insured employer for covered workplace injuries, although unusual circumstances and statutory exceptions can exist. A third-party claim typically focuses on a responsible person or company outside that employer relationship.

What is an example of a third-party workplace claim?

A common example is an employee driving for work who is injured when another motorist causes a crash. The worker may potentially have a workers’ compensation claim and a separate personal injury claim against the negligent driver.

Can a construction worker have a third-party injury claim?

Yes, depending on the facts. Construction projects frequently involve multiple contractors, subcontractors, equipment companies, property owners, and other businesses. If a separate party’s negligence contributes to an injury, a third-party claim may need to be investigated.

What happens to workers’ comp benefits if I receive a personal injury settlement?

Missouri’s workers’ compensation subrogation laws can give an employer or workers’ compensation insurer an interest in part of a third-party recovery. The calculation depends on the benefits paid, recovery obtained, expenses, attorney fees, comparative fault, and other factors.

What if defective equipment caused my injury?

Depending on why the equipment failed and who was responsible, a potential claim may exist against a manufacturer, distributor, maintenance company, or another entity in addition to workers’ compensation benefits.

How do I know whether I have two cases?

Start by asking who caused the injury and whether that person or business was separate from your employer. Because employment relationships and liability can become complicated, an attorney can investigate the parties involved and determine which potential claims warrant further review.

One Injury Can Tell Two Legal Stories

A workplace injury doesn’t always fit neatly into one box.

Workers’ compensation asks:

Were you injured in connection with your employment, and what benefits are available?

A third-party personal injury case asks:

Did someone outside that employer relationship negligently cause the accident, and what damages resulted?

Sometimes only the first question applies.

Sometimes both do.

The problem is that injured workers often don’t know to ask the second question.

At The Pottenger Law Firm, we handle both workers’ compensation and personal injury matters, which means we can look beyond the obvious claim and evaluate the circumstances surrounding the entire accident.

If you’ve been injured at work and believe another driver, contractor, property owner, equipment manufacturer, or other company may have contributed to what happened, don’t assume workers’ compensation is automatically the end of the story.

Learn more about our Workers’ Compensation Practice, explore our Personal Injury Practice Areas, or contact The Pottenger Law Firm to discuss your situation.

Jason Pottenger

Jason Pottenger

Kansas City Personal Injury Attorney | Trial Lawyer | Advocate for the Seriously Injured

For more than three decades, Jason Pottenger has dedicated his legal career to helping injured individuals and families navigate some of the most difficult moments of their lives. As founder of The Pottenger Law Firm, Jason represents victims of car accidents, truck crashes, workplace injuries, construction accidents, catastrophic injuries, wrongful death claims, and other serious personal injury matters throughout Missouri and Kansas.

Known for his hands-on approach and relentless advocacy, Jason believes every client deserves direct access to their attorney, honest communication, and a legal team willing to fight for the full compensation they deserve. His practice is built on a simple principle: when negligence changes a person’s life, accountability matters.

Jason earned his Bachelor of Arts in History from the University of Missouri and his Juris Doctor from the University of Tulsa College of Law. He has been licensed to practice law in Missouri since 1992 and Kansas since 1993.

Throughout his career, Jason has earned recognition from both his peers and professional organizations for his commitment to injured clients and excellence in trial advocacy. His honors include selection to the National Trial Lawyers Top 100, membership in the Million Dollar Advocates Forum and Multi-Million Dollar Advocates Forum, multiple selections as a Kansas City Business Journal “Best of the Bar” attorney, and recognition as a Missouri and Kansas Super Lawyer.

Beyond representing clients, Jason has contributed to the legal profession through teaching, writing, and leadership. He has served on the Board of Governors for the Missouri Association of Trial Attorneys, presented educational programs for fellow attorneys, and authored legal publications focused on personal injury and premises liability litigation.

Jason’s professional peers have also recognized him with an AV Preeminent® rating, one of the highest distinctions awarded for legal ability and ethical standards.

Today, Jason continues to focus his practice on helping accident victims and their families pursue justice against insurance companies, corporations, and negligent parties. Whether handling a complex truck accident case, a workers’ compensation claim, or a catastrophic injury lawsuit, his mission remains the same: helping clients move forward with confidence and dignity.

Professional Associations & Recognition

  • National Trial Lawyers Top 100
  • Million Dollar Advocates Forum Member
  • Multi-Million Dollar Advocates Forum Member
  • Missouri Association of Trial Attorneys, Board of Governors Member
  • Kansas City Metropolitan Bar Association Member
  • Kansas Trial Lawyers Association Member
  • AV Preeminent® Rated Attorney
  • Kansas City Business Journal Best of the Bar Honoree
  • Missouri & Kansas Super Lawyer Recognition

Cases and Topics Jason Pottenger Frequently Handles

  • Kansas City Car Accident Lawyer
  • Missouri Truck Accident Litigation
  • Workers’ Compensation Claims
  • Construction Site Injuries
  • Catastrophic Injury Cases
  • Wrongful Death Lawsuits
  • Premises Liability Claims
  • Insurance Bad Faith Disputes