Missouri Workers' Compensation Payroll Guide

Missouri Payroll And Workers' Compensation Rules

Missouri payroll professionals play an important role in workers' compensation administration because payroll records provide important wage, hours, employment, classification, and payment information used to administer workers' compensation claims, calculate wage-loss benefits, support insurance reporting and audits, and document an employer's compliance responsibilities.

Understanding Missouri workers' compensation rules is especially important for payroll professionals who maintain employee records, calculate wages, process payroll after workplace injuries, respond to workers' compensation claims, or provide payroll information to an employer's insurance carrier, claims administrator, self-insurance program, or the Missouri Division of Workers' Compensation.

Missouri Workers' Compensation Compliance Overview

At A Glance

Missouri generally requires employers with five or more employees to carry workers' compensation insurance or qualify to self-insure, unless a statutory exemption applies.

Employers in the construction industry that erect, alter, demolish, or repair improvements generally must carry workers' compensation coverage when they have one or more employees.

Missouri's employee definition generally includes both full-time and part-time employees, while certain owners and other individuals are treated differently under the law.

Sole proprietors and partners are generally not covered as employees unless they elect coverage.

Members of limited liability companies are generally presumed to be covered unless they properly opt out.

Employers subject to Missouri workers' compensation requirements generally must obtain insurance from an authorized carrier or qualify to self-insure.

Employees should report workplace injuries promptly and generally must provide notice to the employer within 30 days.

Employers generally must report qualifying injuries to their workers' compensation insurer or third-party administrator within five days.

Employers or insurers generally must file a First Report of Injury with the Missouri Division of Workers' Compensation within 30 days after knowledge of a qualifying injury.

An employee generally has two years to file a Claim for Compensation, although the period may be extended to three years if the employer or insurer fails to timely file the required First Report of Injury.

Missouri generally has a three-day waiting period before temporary disability benefits become payable. If the employee remains unable to work for more than 14 consecutive days, the waiting period is generally payable as well.

Temporary total disability benefits are generally calculated at two-thirds of the employee's average weekly wage, subject to statutory maximums.

Missouri workers' compensation benefits can include medical benefits, temporary total disability, temporary partial disability, permanent partial disability, permanent total disability, and survivor benefits.

Missouri workers' compensation premiums are generally affected by payroll, employee classifications, applicable rates, and other insurance-rating factors.

Missouri Workers' Compensation Employer Requirements

Missouri generally requires employers with five or more employees to provide workers' compensation coverage. Construction employers that erect, alter, demolish, or repair improvements generally must carry coverage when they have one or more employees. Certain statutory exemptions apply.

Missouri Workers' Compensation Insurance

An employer subject to the Missouri Workers' Compensation Law generally must obtain workers' compensation insurance from an insurer authorized to write workers' compensation insurance in Missouri or qualify to self-insure its liabilities.

Payroll departments should maintain current workers' compensation insurance information, including the insurance carrier, policy number, effective dates, applicable classifications, and claims administrator contact information. Payroll should coordinate with HR and management whenever employee classifications, job duties, payroll arrangements, or work locations change.

Missouri Workers' Compensation Coverage For Employees

Missouri generally requires workers' compensation coverage when an employer reaches the applicable employee threshold. The statutory definition of employee generally includes both full-time and part-time employees.

Corporate officers generally count toward the employee threshold, while sole proprietors and partners are generally not counted as employees in the same manner. Members of limited liability companies are generally presumed to be covered unless they properly opt out.

Missouri Workers' Compensation Coverage For Independent Contractors

Workers' compensation status depends on the actual employment relationship and applicable Missouri law. Employers should not rely solely on a contract, job title, or Form 1099 when determining whether a worker is an employee or independent contractor.

Missouri also has statutory provisions affecting statutory employers, subcontractors, and workers performing services through contractors. Businesses should carefully review worker classification and subcontractor relationships when determining workers' compensation obligations.

Missouri Workers' Compensation Coverage For Multistate Employers

Employers operating in multiple states should review Missouri workers' compensation requirements whenever employees perform services in Missouri. The applicable requirements can depend on the employee's work location, employment relationship, nature of the work, and other circumstances.

Payroll departments should maintain accurate records showing where employees perform services. Particular attention should be given to employees who regularly travel between states, relocate, work remotely, or perform services in multiple jurisdictions.

Missouri Workers' Compensation Coverage Requirements

Does Missouri Require Workers' Compensation Insurance?: Generally, yes. Employers with five or more employees generally must carry workers' compensation coverage, while construction employers subject to the statute generally must carry coverage with one or more employees.

How Many Employees Must A Business Have Before Workers' Compensation Is Required In Missouri?: Generally, five or more employees. Construction employers engaged in covered construction activities generally have a one-employee threshold.

Are Part-Time Employees Covered By Missouri Workers' Compensation?: Generally, yes. Missouri's employee definition includes both full-time and part-time employees.

Are Seasonal Employees Covered By Missouri Workers' Compensation?: Coverage depends on the employment relationship and applicable statutory provisions. Seasonal status alone should not be assumed to eliminate coverage.

Are Corporate Officers Covered By Missouri Workers' Compensation?: Corporate officers generally count as employees when determining whether the employer has reached the applicable coverage threshold. Specific rules may affect whether an officer is personally covered.

Are LLC Members And Managers Covered By Missouri Workers' Compensation?: Members of a limited liability company are generally presumed to be covered unless they properly opt out. The status of managers and other personnel depends on the applicable employment relationship.

Are Sole Proprietors Required To Have Workers' Compensation Insurance In Missouri?: A sole proprietor's own status differs from that of employees. A sole proprietor who employs the required number of workers may generally be subject to the Workers' Compensation Law.

Are Partners Covered By Missouri Workers' Compensation?: Partners are generally not themselves covered unless they elect to be covered. Employees of a partnership may generally be covered when the applicable requirements are met.

Are Independent Contractors Covered By Missouri Workers' Compensation?: The answer depends on the actual relationship and applicable Missouri law. A contract, Form 1099, or job title does not by itself determine workers' compensation status.

Can A Missouri Employer Self-Insure?: Yes. Employers that satisfy Missouri's applicable financial and regulatory requirements may qualify to self-insure their workers' compensation liabilities.

Is Occupational Accident Insurance The Same As Workers' Compensation Insurance?: No. Occupational accident insurance is a separate insurance product and should not be assumed to satisfy Missouri workers' compensation requirements when coverage is legally required.

Missouri Workers' Compensation Injury Reporting

Employee Notice Of Injury: Employees should report workplace injuries to the employer immediately. Written notice generally must be provided within 30 days of the injury.

Employer Notice To Carrier Or TPA: Employers generally must report injuries to their workers' compensation insurance carrier or third-party administrator within five days of the injury or within five days after the employee reports the injury, whichever is later.

First Report Of Injury: Employers or insurers generally must file a First Report of Injury with the Missouri Division of Workers' Compensation within 30 days after knowledge of a qualifying injury.

Exceptions To State Reporting: Injuries requiring only immediate first aid with no further medical treatment or lost time may be excluded from the First Report of Injury requirement.

Employee Claim: Filing an employer's First Report of Injury does not itself constitute the employee's Claim for Compensation.

Claim Filing Deadline: An employee generally must file a Claim for Compensation within two years after the injury, death, or last payment made on account of the injury or death.

Extended Claim Period: The filing period can generally be extended to three years when the employer or insurer fails to timely file the required First Report of Injury.

Missouri Workers' Compensation Wage Information

Payroll records can be particularly important when a Missouri workers' compensation claim involves temporary or permanent disability benefits. Payroll may be required to provide wage and employment information used to determine the employee's average weekly wage and applicable compensation rate.

Employer Wage Information

Missouri workers' compensation benefit calculations can depend on the employee's average weekly wage. Payroll should maintain complete historical compensation records and provide accurate information to the employer's insurance carrier or claims administrator when requested.

Maintain complete historical wage records

Maintain hours-worked records

Track regular wages

Track overtime wages

Track bonuses and commissions

Track other compensation relevant to wage calculations

Document wage changes before the injury

Provide accurate wage information to the carrier or claims administrator

Review wage information for accuracy before submission

Missouri Workers' Compensation Benefit Calculations

Average Weekly Wage: Missouri generally bases temporary disability compensation on the employee's average weekly wage, subject to statutory calculation requirements and limits.

Temporary Total Disability: An employee who remains unable to work because of a compensable workplace injury may qualify for temporary total disability benefits.

Temporary Partial Disability: An employee who returns to work but earns less because of a compensable injury may qualify for temporary partial disability benefits.

Waiting Period: Missouri generally does not pay disability compensation for the first three days an employee is unable to work.

Retroactive Waiting Period: If the employee remains unable to work for more than 14 consecutive days, the three-day waiting period is generally paid as well.

Compensation Rate: Temporary total disability benefits are generally calculated at two-thirds of the employee's average weekly wage, subject to the applicable maximum.

Permanent Partial Disability: Qualifying employees may receive permanent partial disability benefits for covered permanent impairment.

Permanent Total Disability: Certain severely disabled employees may qualify for permanent total disability benefits under applicable Missouri requirements.

Medical Benefits: Workers' compensation generally provides medical treatment reasonably required to cure and relieve the effects of a compensable workplace injury.

Survivor Benefits: Certain surviving dependents may qualify for benefits following a compensable work-related death.

Funeral Benefits: Missouri workers' compensation law provides for funeral expenses following a compensable death, subject to the statutory limit.

Missouri Workers' Compensation Rates

Missouri workers' compensation benefit levels are separate from employer insurance premiums. Benefit amounts depend on the employee's applicable average weekly wage, the type of benefit, the date of injury, and statutory maximums.

For 2026, Missouri workers' compensation insurance rates include a 1.5% administrative tax, a 1.5% administrative surcharge, and a 3.0% Second Injury Fund surcharge. Individual employer premiums can vary based on classification, payroll, experience, and applicable insurance-rating factors.

Payroll departments should maintain accurate payroll and employee classification information because those records can affect workers' compensation premium calculations and insurance audits.

Missouri Workers' Compensation Medical Care

Workers' compensation medical benefits can cover appropriate medical treatment for compensable work-related injuries and occupational diseases. Payroll generally does not administer medical care, but payroll information can become relevant when an employee's medical status affects work hours, wages, modified duty, or return-to-work arrangements.

Payroll should coordinate with HR and the claims administrator when medical restrictions result in changes to an employee's schedule, duties, earnings, or employment status.

Missouri Workers' Compensation And Modified Duty

An injured employee may return to work with restrictions when medically authorized. The employee may return to the regular position, a modified-duty position, or another position that complies with applicable work restrictions.

Payroll should accurately record regular wages, reduced hours, modified-duty earnings, overtime, bonuses, and other compensation after an employee returns to work. Accurate post-injury earnings can be important when determining applicable wage-loss benefits.

Document the employee's return-to-work date

Track work restrictions through the employer's HR and workers' compensation process

Track regular and modified-duty hours

Track post-injury wages

Track overtime and additional compensation

Document changes in pay or work schedule

Provide post-injury wage information when requested by the claims administrator

Update payroll records when the employee returns to regular duty

How Missouri Payroll And Workers' Compensation Work Together

Workers' compensation and payroll are closely connected. When an employee is injured at work, payroll may need to provide historical earnings, hours worked, employment information, wage changes, and post-injury earnings. Payroll may also become involved when an injured employee:

Misses work because of a workplace injury

Returns to work with medical restrictions

Works reduced hours

Performs modified or light-duty work

Receives wages after returning to work

Receives salary continuation or other employer-paid compensation

Experiences a change in compensation following an injury

Missouri payroll departments should maintain a documented procedure for responding to workers' compensation claims and producing historical payroll and hours-worked information. Payroll should coordinate with HR, management, the employee's supervisor, and the workers' compensation claims administrator when an injury changes an employee's work status or compensation.

Training Resources

Workers' Comp - Workers' Recovery Professional Associate (WRPA) Certification

Recommended Workers' Compensation Training

How Workers' Compensation Works
Learn the fundamentals of workers' compensation, including claims, benefits, employer responsibilities, and return-to-work considerations.

Workers' Comp Premium Control: Experience Mods, Classifications, and Audit Mastery
Develop a stronger understanding of workers' compensation classifications, experience modification factors, premium management, and insurance audits.

Workers' Comp Workers' Recovery Professional Associate Certification
Build specialized knowledge for professionals involved in workers' compensation and employee recovery.

Other Help

Additional Missouri Workers' Compensation Resources

Difficult Administrative Areas

Missouri workers' compensation administration can become complicated when payroll, human resources, management, medical providers, insurance carriers, self-insured employers, claims administrators, and the Missouri Division of Workers' Compensation must coordinate information across different parts of an employee's claim.

Determining The Correct Wage Information: Payroll should maintain accurate historical wage and hours-worked information and provide the information requested by the insurance carrier or claims administrator.

Handling Employees With Multiple Jobs Or Pay Rates: Payroll should maintain clear records showing wages, hours, duties, classifications, and applicable pay rates.

Tracking Modified-Duty Employees: Payroll should separately document regular wages, reduced hours, modified-duty earnings, overtime, and other compensation after an injured employee returns to work.

Coordinating Workers' Compensation And Paid Leave: Payroll should maintain clear records of vacation, sick leave, PTO, salary continuation, and other employer-paid compensation during a workers' compensation claim.

Handling Return-To-Work Changes: Payroll should promptly update records when an employee returns to work, changes hours, performs modified duties, changes compensation, or returns to regular duty.

Maintaining Accurate Injury And Employment Records: Payroll records should be consistent with HR, timekeeping, employment, and workers' compensation records.

Managing Subcontractor Coverage: Employers should obtain appropriate documentation concerning subcontractor workers' compensation coverage when required and should not assume that subcontractor workers are outside workers' compensation requirements.

Multistate Employees: Employers with workers performing services in multiple states should maintain accurate work-location records and coordinate workers' compensation requirements with HR and the appropriate administrator.

Responding To Payroll Information Requests: Claims administrators may request detailed wage and hours-worked information. Payroll should establish a standardized process for gathering, reviewing, and transmitting accurate information.

Protecting Confidential Employee Information: Payroll departments should limit access to employee medical, wage, and workers' compensation information to authorized personnel with a legitimate business need.

Keeping Procedures And Rates Current: Missouri workers' compensation laws, benefit amounts, forms, reporting requirements, insurance rates, and administrative procedures can change. Payroll and HR departments should periodically review their procedures and verify current Missouri requirements.

Common Errors

Missouri workers' compensation mistakes often occur when payroll, HR, safety, and management do not have a consistent process for identifying, reporting, documenting, and administering workplace injuries.

Failing To Maintain Required Workers' Compensation Coverage: Employers subject to Missouri's Workers' Compensation Law should maintain required insurance or qualify as self-insured employers.

Incorrectly Applying The Five-Employee Threshold: Employers should accurately count employees when determining whether coverage is required, while construction employers should apply the separate one-employee requirement.

Incorrectly Excluding Part-Time Workers: Part-time status does not automatically establish that a worker is outside the Missouri workers' compensation system.

Misclassifying Employees As Independent Contractors: Employers should not rely solely on a contract, job title, or Form 1099 when determining worker status.

Failing To Report An Injury Promptly: Delayed reporting can interfere with claim administration and required reporting deadlines.

Failing To Report An Injury To The Carrier Within Five Days: Employers should promptly transmit required injury information to their workers' compensation carrier or third-party administrator.

Failing To File The First Report Of Injury On Time: Employers and insurers generally must file qualifying First Reports of Injury with the Division within 30 days after knowledge of the injury.

Confusing The First Report Of Injury With The Employee's Claim: Filing an employer's First Report of Injury does not itself constitute the employee's Claim for Compensation.

Using Incorrect Wage Information: Incomplete or inaccurate payroll and timekeeping records can interfere with the calculation and administration of wage-loss benefits.

Ignoring Post-Injury Earnings: Payroll should accurately record wages and hours after an employee returns to work, particularly when the employee works reduced hours or modified duties.

Failing To Track Salary Continuation And Paid Leave: Payroll should separately document employer-paid compensation, salary continuation, vacation, sick leave, and other paid leave following an injury.

Failing To Coordinate Multistate Employees: Employers should review workers' compensation requirements when employees regularly work in Missouri and other states.

Using Outdated Benefit Information: Payroll and claims personnel should verify the maximum weekly compensation rate applicable to the employee's injury year.

Failing To Maintain Confidentiality: Workers' compensation claims may involve sensitive medical, wage, and employment information. Access should be limited to authorized personnel.

Recent Court Cases

James Eckardt v. Treasurer of the State of Missouri as Custodian of the Second Injury Fund: Decided by the Missouri Supreme Court on April 29, 2025, this case addressed permanent total disability benefits and the treatment of preexisting disabilities under Missouri's Second Injury Fund provisions. The Court addressed statutory changes affecting the calculation of qualifying preexisting disabilities.

Diana Penney v. Treasurer of the State of Missouri as Custodian of the Second Injury Fund: Decided by the Missouri Supreme Court on April 29, 2025, this case addressed whether preexisting occupational diseases could qualify as compensable injuries for purposes of a Second Injury Fund permanent total disability claim. The Court held that the occupational diseases at issue did not satisfy the applicable statutory definition.

Roslyn T. Barnes v. Athene Annuity & Life Assurance Company: Decided by the Missouri Court of Appeals, Western District, on March 17, 2026, this case involved an asbestos-related disease claim and the workers' compensation exclusivity defense. The court affirmed the judgment for the employer and addressed the application of workers' compensation exclusivity to the plaintiff's civil claims.

Frequently Asked Questions About Missouri Workers' Compensation

Does Missouri require employers to carry workers' compensation insurance?: Generally, yes. Employers with five or more employees generally must provide workers' compensation coverage unless a statutory exception applies. Construction employers engaged in covered construction activities generally must carry coverage with one or more employees.

How many employees must a business have before workers' compensation is required in Missouri?: Generally, five or more employees. Covered construction employers generally have a one-employee threshold.

Are part-time employees covered by Missouri workers' compensation?: Generally, yes. Missouri's definition of employee includes both full-time and part-time employees.

Are seasonal employees covered by Missouri workers' compensation?: Coverage depends on the employment relationship and applicable statutory requirements. Seasonal status alone should not be assumed to eliminate coverage.

Are corporate officers covered by Missouri workers' compensation?: Corporate officers generally count as employees for purposes of determining whether an employer reaches the applicable coverage threshold. The individual's personal coverage status may depend on additional statutory requirements.

Are LLC members and managers covered by Missouri workers' compensation?: LLC members are generally presumed to be covered unless they properly opt out. The status of managers and other LLC personnel depends on the applicable employment relationship.

Are sole proprietors required to have workers' compensation insurance in Missouri?: Sole proprietors are generally not themselves covered unless they elect coverage. A sole proprietor who employs the required number of workers may nevertheless be required to provide coverage for those employees.

Are partners covered by Missouri workers' compensation?: Partners are generally not themselves covered unless they elect coverage. Employees of a partnership may generally be covered when the applicable requirements are met.

Are independent contractors covered by Missouri workers' compensation?: The answer depends on the actual relationship and applicable Missouri law. A contract, Form 1099, or job title does not by itself determine workers' compensation status.

How quickly should an employee report a workplace injury in Missouri?: Employees should report workplace injuries immediately. Written notice generally must be provided within 30 days of the injury.

How long does an employee have to file a Missouri workers' compensation claim?: An employee generally has two years to file a Claim for Compensation after the injury, death, or last payment made on account of the injury or death. The period may be extended to three years if the employer or insurer fails to timely file the required First Report of Injury.

How are Missouri workers' compensation benefits calculated?: Temporary total disability benefits are generally calculated at two-thirds of the employee's average weekly wage, subject to applicable statutory maximums and other requirements.

What is the Missouri workers' compensation waiting period?: Missouri generally has a three-day waiting period for disability compensation. If the employee remains unable to work for more than 14 consecutive days, the three-day waiting period is generally paid as well.

What payroll records are important for a Missouri workers' compensation claim?: Important records can include wages, hours worked, overtime, bonuses, commissions, employment dates, wage changes, job classifications, pre-injury earnings, post-injury earnings, modified-duty wages, salary continuation, paid leave, and other compensation information relevant to the claim.

What happens when an injured Missouri employee returns to work?: An injured employee may return to regular or modified work depending on medical restrictions and the circumstances of the claim. Payroll should accurately track hours, wages, duties, restrictions, and changes in compensation.

Does Missouri provide vocational rehabilitation for injured workers?: Missouri workers' compensation can provide rehabilitation-related benefits in qualifying circumstances. Employers and injured workers should review the benefits applicable to the particular injury and claim.

What are Missouri workers' compensation rates for 2026?: Missouri's 2026 workers' compensation rates include a 1.5% administrative tax, a 1.5% administrative surcharge, and a 3.0% Second Injury Fund surcharge. Individual insurance premiums and employer costs can vary based on classification, payroll, experience, and other applicable factors.

What are common Missouri workers' compensation payroll mistakes?: Common mistakes include failing to maintain required coverage, incorrectly counting employees, misclassifying workers, delaying injury reporting, failing to report injuries to the carrier within the required period, maintaining inaccurate payroll information, failing to document post-injury earnings, overlooking modified-duty changes, and using outdated benefit or rate information.

Where can employers find official Missouri workers' compensation information?: Official information is available through the Missouri Department of Labor and Industrial Relations, Division of Workers' Compensation, including information concerning employer coverage, claims, benefits, reporting, insurance, self-insurance, forms, and appeals.