How States Regulate Workers Compensation: A Primer for Multi-State Employers
Key Takeaways
- Every state except Texas mandates workers comp for most private employers, but the rules on who qualifies and what's covered vary widely.
- Multi-state employers must comply with the workers comp laws of each state where employees live or work — not just where the business is headquartered.
- Four states operate monopolistic state funds, meaning private insurance is not an option for primary coverage there.
- Payroll classification codes, benefit levels, and premium rates are all determined at the state level and differ significantly.
- Extraterritorial provisions can extend your home-state coverage to traveling employees, but gaps are common and dangerous.
- Non-compliance penalties range from fines and back-premium assessments to criminal charges and stop-work orders.
State-Regulated Workers Compensation
Workers compensation is an insurance system that pays for medical care and lost wages when an employee is injured or becomes ill because of their job. Unlike federal programs, workers comp is governed almost entirely at the state level — meaning each state sets its own rules about who must carry it, what it covers, and how much it pays. For employers operating in more than one state, this creates a patchwork of obligations that must all be met simultaneously.
Employers in monopolistic states (North Dakota, Ohio, Washington, Wyoming) must purchase workers comp directly from the state fund — private carriers are not permitted for primary coverage in those jurisdictions.
Why Workers Comp Is a State-by-State Puzzle
If you've ever wondered why workers compensation feels so complicated, here's the short answer: the federal government largely stays out of it. With the exception of a handful of federal programs covering specific industries — like the Longshore and Harbor Workers' Compensation Act or the Federal Employees' Compensation Act — workers comp is a state show, start to finish.
That means 50 different sets of rules. Fifty different benefit structures. Fifty different agencies enforcing compliance. And if your company has employees in multiple states, you're on the hook for all of them.
This isn't just a paperwork nuisance. Getting it wrong can mean stop-work orders, lawsuits, and personal liability for business owners. So let's break down how the system actually works — and what multi-state employers specifically need to watch for.
For a solid foundation on what workers comp covers in the first place, see our full overview of workers comp coverage — it'll give you the big picture before we get into the state-specific details here.
The Core Framework: What States Actually Control
When we say workers comp is state-governed, what does that really mean day-to-day? Quite a lot, actually. Here's what each state gets to decide independently:
- Who must carry coverage: Most states require coverage once you hire your first employee. Others set thresholds — some won't mandate coverage until you have three, four, or even five employees. Texas is the only state that makes workers comp entirely optional for private employers (though opting out comes with its own legal risks).
- Who counts as an employee: Sole proprietors, partners, corporate officers, and independent contractors may be included or excluded depending on the state — and sometimes it's the employer's choice.
- Benefit levels: The percentage of lost wages replaced (typically two-thirds of the worker's average weekly wage), the maximum weekly benefit cap, and the duration of benefits all vary by state.
- Medical treatment protocols: Some states let injured workers choose their own doctors. Others require employees to see an employer-designated physician, at least initially.
- Premium rates and classifications: Each state maintains its own classification system for job types. The same job title can carry very different rates in different states based on local loss history.
Texas: The Outlier in the System
Texas is the only state that does not require private employers to carry workers comp insurance. However, opting out doesn't mean opting out of liability — Texas employers who forgo coverage lose the legal protections workers comp normally provides and can be sued by injured employees without the usual affirmative defenses. Many large Texas employers still carry coverage for this reason.
Federal Workers Comp Programs Are Separate
Certain industries fall under federal workers comp programs rather than state law. These include maritime workers covered by the Longshore and Harbor Workers' Compensation Act, coal miners covered by the Black Lung Benefits Act, and federal government employees covered by FECA. If your business operates in these sectors, federal requirements apply alongside — or instead of — state rules.
Understanding how these variables stack up against each other is critical before you expand into a new state. A business that's fully compliant in one state can be breaking the law the moment it hires its first employee across the border without adjusting its coverage.
The Four Monopolistic States: A Special Category
Most employers can choose between purchasing workers comp from a private insurer or — in competitive states — from a state-run fund that competes with private carriers. But four states don't give you that choice at all.
In North Dakota, Ohio, Washington, and Wyoming, employers must buy workers comp coverage directly from the state fund. Private insurers are simply not allowed to write primary workers comp policies there. If you have employees working in any of these four states, you'll need to enroll with that state's fund — full stop.
50
Separate state workers comp systems in the U.S.
Each U.S. state administers its own workers compensation program with unique rules, rates, and enforcement mechanisms.
4
Monopolistic states requiring state fund coverage
North Dakota, Ohio, Washington, and Wyoming prohibit private insurers from writing primary workers comp policies.
1 in 4
Multi-state employers with coverage gaps
Industry surveys suggest a significant share of employers with workers in multiple states carry inadequate or incorrectly structured workers comp coverage.
$1.21
Average national workers comp cost per $100 of payroll
According to the National Academy of Social Insurance, average rates vary significantly by state and industry classification.
Texas
Only state where workers comp is optional
Texas is the sole state that does not mandate workers compensation insurance for private employers, though opting out carries significant litigation risk.
This matters a lot for multi-state employers. Your standard workers comp policy, even if it includes multi-state endorsements, cannot satisfy the primary coverage requirement in these states. You'll need a separate account with each monopolistic state fund in which you have employees.
The practical upshot: add these four states to a special checklist whenever you're expanding your workforce. Missing the enrollment step isn't a minor oversight — it's a compliance failure that can expose you to personal liability and government penalties.
Jurisdiction: Which State's Law Actually Applies?
Here's where multi-state employers tend to get tripped up most often. Which state's workers comp law governs a claim?
The general rule is that the state where the injury occurred has jurisdiction. But workers comp is rarely that simple. Courts and statutes in many states recognize additional bases for jurisdiction:
- State of employment: Where the employment contract was made or the employee was hired.
- State of residence: Where the employee lives and regularly works.
- State of principal location: Where most of the work is performed.
An injured employee may actually be able to file a claim in multiple states — whichever jurisdiction offers the most favorable benefits. This isn't fraud; it's a legitimate part of how workers comp law works. As an employer, you need coverage that responds in all of those states, not just your home state.
“Employers often think of workers compensation as a single policy decision, but for multi-state operations it's really a continuous compliance program. The moment an employee crosses a state line — even temporarily — new legal obligations can arise.”
— Jon Geanuracos, Workers Compensation Compliance Specialist and Insurance Consultant
This is exactly why the Other States Insurance section of your workers comp policy matters so much. That section extends your coverage to states beyond those specifically listed on your policy's information page. But — and this is critical — it typically doesn't cover the four monopolistic states, and it won't kick in if you knew you had employees in a state and simply forgot to list it. Talk to your broker about making sure your policy is structured correctly for everywhere your people actually work.
For a state-by-state breakdown of specific mandates and thresholds, our state requirements reference is a practical companion to this article.
Extraterritorial Coverage: Your Traveling Employees
What happens when one of your employees — normally based in, say, Illinois — travels to a client site in Florida and gets hurt on the job?
Most states have extraterritorial provisions that extend home-state coverage to employees temporarily working in another state. "Temporarily" is the operative word. If the work in Florida is occasional and short-term, your Illinois policy likely has you covered. If your employee is stationed in Florida for six months, that's a different story — and Florida may assert jurisdiction, requiring Florida coverage.
Track Remote Workers by Work Location, Not Home Address
For workers comp purposes, what matters is where work is actually performed — not necessarily where a person lives. A remote employee who works from a home office in Colorado is performing work in Colorado. That's the state whose jurisdiction applies, and that's the state that needs to be reflected on your policy.
Audit Your Coverage Every Time You Hire in a New State
Don't wait for your annual policy renewal to update your coverage. Every time you bring on a worker in a state not already listed on your policy, notify your broker immediately. The cost of adding a state is almost always far less than the penalties for operating without coverage — even for a single employee, even briefly.
The definition of "temporary" isn't universal. Some states define it as 30 days, others as 90. A few states don't recognize extraterritorial provisions from other states at all. The safest approach for any employee spending significant time in another state is to add that state to your policy explicitly.
Remote workers add another layer of complexity. If you hired someone in Colorado to work from home and they were previously listed under your Illinois policy, that employee may not be properly covered — and you may not know until a claim is filed. As remote work has become standard for many businesses, this gap has turned into one of the most common compliance problems for multi-state employers.
Premium Calculation Across State Lines
Workers comp premiums are calculated using a formula that's largely consistent across states but uses different inputs depending on jurisdiction. The basic building blocks are:
- Payroll: Your premium is based on total payroll, divided by $100 increments.
- Classification codes: Each job type is assigned a code that reflects the risk level of that work. A clerical worker and a roofer have very different codes — and therefore very different rates.
- State rate: Each state publishes its own base rates by classification code, reflecting local claims history and cost of living.
- Experience modification factor (EMod): Your company's own claims history is factored in. A strong safety record lowers your premiums; a string of costly claims raises them.
For multi-state employers, payroll must be allocated to the correct state based on where work is actually performed — not where the company is headquartered. Misallocating payroll is one of the most common audit findings, and it can result in significant back-premium assessments.
Our comprehensive workers comp guide goes deeper on how premiums are calculated and what affects your final cost — worth a read if you want to understand the full picture.
Common Compliance Mistakes Multi-State Employers Make
Even well-intentioned employers make costly errors when managing workers comp across state lines. Here are the ones I see come up most often:
- Assuming one policy covers everything
- A single workers comp policy can cover multiple states — but only if those states are properly listed or included in the Other States section. Many employers assume their carrier handles this automatically. They often don't.
- Forgetting remote workers
- When an employee moves states or starts working remotely from a new location, the employer's coverage map needs to be updated. This step frequently gets skipped.
- Misclassifying independent contractors
- Each state has its own test for determining whether a worker is truly an independent contractor or should be treated as an employee for workers comp purposes. Misclassification can expose you to penalties and retroactive premiums.
- Ignoring monopolistic state requirements
- Hiring someone in Ohio or Washington without setting up the required state fund account is a compliance failure, even if you have an otherwise solid workers comp policy.
- Not updating coverage when expanding
- Opening a new office, acquiring a business, or simply hiring in a new state all trigger compliance obligations. They don't trigger automatic policy updates.
If you're setting up coverage for the first time or expanding into new states, our guide to setting up workers comp coverage walks through the practical steps in detail.
Track Remote Workers by Work Location, Not Home Address
For workers comp purposes, what matters is where work is actually performed — not necessarily where a person lives. A remote employee who works from a home office in Colorado is performing work in Colorado. That's the state whose jurisdiction applies, and that's the state that needs to be reflected on your policy.
Audit Your Coverage Every Time You Hire in a New State
Don't wait for your annual policy renewal to update your coverage. Every time you bring on a worker in a state not already listed on your policy, notify your broker immediately. The cost of adding a state is almost always far less than the penalties for operating without coverage — even for a single employee, even briefly.
What to Do Right Now if You Operate in Multiple States
If this article has made you realize you might have some gaps, here's a practical starting point:
- Audit your workforce geography. List every state where you currently have employees — including remote workers — and note whether each state is explicitly listed on your workers comp policy.
- Check for monopolistic states. If any employees work in North Dakota, Ohio, Washington, or Wyoming, verify that you have active accounts with those state funds.
- Review your Other States endorsement. Ask your broker exactly which states are covered and what the conditions are for coverage to apply.
- Verify classification codes. Make sure each employee's job duties are matched to the correct classification code for the state where they work.
- Establish a process for change events. Any time you hire in a new state, open a new location, or a remote employee relocates, that should trigger an automatic review of your workers comp coverage.
Workers comp compliance isn't a one-and-done task — it's an ongoing responsibility that evolves as your workforce changes. The good news is that once you have the right systems in place, it becomes a manageable part of your HR and insurance routine rather than a constant source of anxiety.
First-time employers dealing with workers comp for the first time should also check out our guide for first-time employers — it covers the foundational obligations you need to know before you hire your first person.
Frequently Asked Questions
All claims in this article are backed by peer-reviewed research. We follow strict editorial guidelines to ensure accuracy and reliability. Sources available on request from our editorial team.
