Missouri Workers' Comp: The 5-Employee Rule and Construction Exception

Missouri's workers' compensation requirement is straightforward for most industries: get coverage when you hire your fifth employee. But construction employers face a different rule, and business owners in any industry need to understand their options for exemption. This guide covers what Missouri requires, who must carry coverage, what exemptions are available, and what happens when you don't comply.

The Core Rule: Coverage at 5+ Employees

Under Missouri law (RSMo 287.030), employers with five or more employees must carry workers' compensation insurance. This threshold applies to most industries: retail, professional services, manufacturing, hospitality, and others. Once you reach five employees, coverage is mandatory, not optional.

The requirement is clear: five employees means you need a policy. Four employees means you currently do not. The moment you onboard your fifth worker, you have a legal obligation to provide workers' compensation coverage. Employers who wait, hoping they'll never reach that threshold, are gambling with both their personal liability and their employees' financial security if an injury occurs.

Missouri law uses "employee" in the standard sense. It includes full-time, part-time, and temporary workers on your payroll. Independent contractors and sole proprietors working alone do not count toward the threshold. If you're a sole proprietor or a partnership with only partners and no hired employees, the 5-employee rule doesn't apply to you yet, but construction employers face a different standard, discussed below.

The Construction Exception: 1+ Employee Triggers Coverage

Construction employers operate under a more stringent standard. If you work in construction and hire even one employee, Missouri requires workers' compensation coverage. This applies whether you erect, demolish, alter, or repair improvements (buildings, infrastructure, other structures). The construction exception recognizes the inherently higher injury risk on job sites and does not wait for the fifth hire.

The construction exception is defined by the nature of the work, not by business structure. A sole proprietor in construction who hires a single helper must carry coverage. A construction LLC with one employee must carry coverage. An independent contractor who brings on a laborer must carry coverage. If you are in the construction industry and you have one or more employees, Missouri workers' compensation is mandatory.

This exception applies broadly to construction. It includes general contractors, specialty trades (plumbing, electrical, HVAC, roofing), demolition, excavation, restoration, and related work. If your business involves improving real property and you employ others to do the work, you fall under the 1-employee threshold, not the 5-employee threshold.

LLC Owners and the Member Exemption Election

Missouri law allows LLC members to elect exemption from workers' compensation coverage, under specific conditions. This is an important distinction for business owners who are also working in the business. If you own an LLC and work in the LLC as a member, you may be able to elect not to be covered, and your business may not be required to cover you as if you were an employee.

The exemption election is not automatic. Under RSMo 287.037, LLC members are covered by default, and a member who wants out must give a written notice of rejection, on a form developed by the Department of Commerce and Insurance, to both the LLC and its insurer. The election applies only to the LLC member making the election; it does not exempt your LLC from covering actual employees if you have them. If your LLC has five or more employees (or one or more if you are in construction), you still must carry workers' compensation coverage for those employees.

The member exemption exists because members are owners, not traditional employees. However, the exemption is optional. Many LLC owners choose to maintain coverage for themselves for the same reason sole proprietors sometimes elect coverage voluntarily: if you are injured while working for your own business, workers' compensation provides medical coverage and wage replacement benefits without requiring you to sue your own LLC. The trade-off is the cost of that coverage versus the protection it offers.

If you have multiple members and some work in the business while others do not, each member can make their own exemption election. One member might elect coverage while another elects exemption. Each member who rejects coverage must give the written rejection notice to the LLC and its insurer, and can later rescind it in writing, with coverage resuming only from the date the insurer receives the rescission.

Corporate Officers and Exemption Elections

Missouri's statutory rejection right for corporations is narrower than for LLCs. Since January 1, 2018, a shareholder who owns at least 40 percent of an S corporation may individually reject coverage by giving written notice to the S corporation and its insurer. Other corporate officers have no comparable rejection right in RSMo 287.037, so ask your insurer how officers are treated on your policy.

The exemption does not eliminate the corporation's obligation to cover other employees. If your corporation has five or more employees (or one or more if you operate in construction), you must carry a workers' compensation policy that covers those employees. The rejection applies only to the shareholder who makes it.

Some eligible S corporation owners reject coverage to reduce premiums, particularly in small operations where the owner takes a minimal salary. Others maintain coverage for themselves to protect against injury-related lost income. The decision should be made deliberately, with an understanding of the consequences. Without coverage, an injured officer receives no workers' compensation benefits and must pursue other remedies (typically civil suit against the corporation, which raises complex legal issues around employer immunity).

Penalties for Non-Coverage

Missouri enforces the workers' compensation requirement. Employers who operate without required coverage face significant penalties. The specific penalties depend on whether coverage was never obtained, lapsed, or deliberately evaded, and whether an injury occurred during the period of non-coverage.

An employer who knowingly fails to insure is liable to the state for a penalty of up to three times the annual premium it would have paid or up to $50,000, whichever is greater. If an employee is injured and the employer had no coverage, the consequences are severe: the injured employee may file a workers' compensation claim against the employer or pursue a civil claim against the employer. The employer loses the liability shield that workers' compensation provides. In a civil lawsuit, the employer can be liable for unlimited damages, including pain and suffering, damages that workers' compensation does not cover. Additionally, knowingly failing to insure is a class A misdemeanor, and a subsequent violation is a class E felony.

Beyond legal penalties, an uninsured employer faces reputational damage and difficulty bidding on jobs. Many commercial clients require proof of workers' compensation insurance before hiring a contractor. Bonding companies and lenders often require it as a condition of doing business. Operating without coverage is not just illegal; it isolates your business from mainstream opportunities.

How to Obtain Workers' Compensation Coverage in Missouri

Once you determine that you need coverage, obtaining it is straightforward. Missouri allows employers to carry workers' compensation insurance through private insurance carriers, or for larger employers, through self-insurance.

Most small and mid-sized employers purchase a standard workers' compensation policy from a licensed insurance carrier. You will provide information about your business type, payroll, job duties, and claims history. The insurer will assign a premium rate based on the industry classification and your experience. Construction employers typically face higher premiums than office-based businesses because of higher injury risk.

The application process requires details about each employee's job duties and payroll amount. Premium is calculated per $100 of payroll. For example, if the rate for your industry is $2.50 per $100 of payroll, and your annual payroll is $400,000, your estimated premium would be $10,000. Rates vary significantly by industry; check with your carrier for the exact rate class that applies to your business.

Self-insurance is available to large employers who meet Missouri's financial and administrative requirements, but it is uncommon for businesses under 50 employees. Stick with a standard carrier unless your business is large enough that self-insurance makes financial sense.

Common Mistakes Employers Make

One frequent mistake is misclassifying employees as independent contractors to avoid the 5-employee threshold. Missouri law and federal law both have tests for true independent contractor status. Merely calling someone a contractor does not make them one. If the person works under your control, follows your process, works your schedule, and uses your tools, they are likely an employee for workers' compensation purposes, even if they receive a 1099 form. Misclassification exposes you to audit, back premiums, and penalties.

Another mistake is assuming that a member exemption election is automatic. It is not. A member who wants to reject coverage must give written notice to the LLC and its insurer. If that notice was never given, the member is still covered and premiums are owed on that coverage.

A third mistake is allowing coverage to lapse. Some employers let policies expire when they hit financial pressure, intending to renew quickly. If an injury occurs during the lapse, coverage is denied and penalties apply. Coverage lapses are tracked, and returning to coverage after a gap often results in higher rates or exclusions.

Construction employers sometimes underestimate their classification. A contractor who thinks of themselves as primarily administrative and only occasionally on site may still be a construction employer with a 1-employee threshold. If that contractor brings on even one laborer, coverage is required immediately. Misunderstanding this threshold is a common source of non-compliance.

Key Points to Remember

• If your business has five or more employees and is not in construction, Missouri requires workers' compensation coverage.
• If your business is in construction, coverage is required when you hire your first employee.
• "Construction" includes erecting, demolishing, altering, or repairing improvements to real property.
• LLC members, and S corporation shareholders owning 40 percent or more, may reject coverage by written notice to the business and its insurer.
• A member or shareholder rejection does not exempt your business from covering actual employees.
• Penalties for non-coverage are significant: fines, mandatory coverage, and unlimited civil liability if an employee is injured.
• Obtaining coverage is straightforward: apply to a licensed carrier with information about your business, payroll, and job duties.
• Costs depend on your industry classification and payroll; rates are applied per $100 of annual payroll.
• Do not assume exemptions are granted or misclassify employees to avoid the threshold; both actions expose you to audit and penalties.

Final Thought

Missouri's workers' compensation requirement is not bureaucratic busywork. It exists because workplace injuries happen, and the financial burden of an uninsured employee's recovery falls hard on both the employee and the employer. For most non-construction businesses, the 5-employee threshold gives you time to build before the requirement kicks in. For construction businesses, the 1-employee threshold acknowledges higher risk. Either way, the rule is clear, the penalties are real, and compliance is the only prudent path.

Disclaimer: This content is informational and does not constitute legal, tax, or insurance advice. Consult a qualified attorney or insurance professional regarding your specific situation and obligations under Missouri workers' compensation law.