Arizona Workers’ Compensation Requirements for Employers

Arizona’s workers’ compensation requirements for employers reach almost every business in the state: if you employ even one person regularly in your trade or business, you must secure workers’ compensation insurance under A.R.S. § 23-902.¹ The system is no-fault. Injured workers get medical care and wage replacement without proving anyone was at fault, and in exchange, employers who carry coverage are shielded from personal injury lawsuits by their employees.² Skip coverage and that shield disappears, along with several thousand dollars of your money.

Who Has to Carry Coverage

The mandate is broad. Corporations, LLCs, partnerships, sole proprietors with employees, and government entities all fall under it on the same terms.² The state, counties, cities, towns, municipal corporations, and school districts are all included.¹

The trigger is anyone “regularly employed” in your trade, business, or profession. Arizona defines that phrase to include both continuous and seasonal work, so a holiday retailer or a summer landscaper is not off the hook.¹ Full-time workers, part-time workers, minors (whether legally employed or not), and employees furnished through a professional employer organization all count.

A narrow set of workers falls outside the mandate. Domestic servants are excluded, though their employers may opt in voluntarily. Workers whose employment is both casual and outside the usual course of the employer’s business are also excluded, but both conditions must be true at the same time; a casual worker doing something inside your normal operations is still covered.³

How to Get a Policy

Arizona has no state-run insurance fund. You buy coverage from any private carrier licensed to write workers’ compensation in the state, either directly or through a licensed agent.² Once the carrier approves your application, you receive a certificate of insurance as proof of compliance. Keeping the policy in force means paying premiums on schedule and cooperating with the insurer’s annual payroll audit.

Underwriting requires three pieces of information:

Your Federal Employer Identification Number (FEIN).
Estimated annual payroll, since premium is calculated as a rate per $100 of payroll.
NCCI classification codes for each job category. A clerical worker’s code differs sharply from a roofer’s, and misclassifying employees into lower-risk codes can trigger penalties during the annual audit.

If two private carriers decline to write your policy, you can qualify for the assigned risk pool administered through the National Council on Compensation Insurance. Premiums there tend to run higher than in the voluntary market, and employers whose premium reaches $250,000 or more are placed in a mandatory retrospective rating plan where final costs adjust to actual losses.⁴

Self-Insurance

Large employers can apply to the Industrial Commission for authority to self-insure and pay claims directly instead of buying a policy. The minimum qualifications are steep: at least $2 million in annual payroll, total assets of $50 million or a cash-flow ratio of at least 0.25, and at least five years operating in Arizona.⁴ Most small and mid-size businesses will not clear that bar.

Employees Versus Independent Contractors

Misclassifying an employee as an independent contractor is one of the most expensive mistakes an Arizona employer can make. The label on the invoice does not decide the question. Arizona looks at who controls the work: whether you dictate when, where, and how tasks get done; whether you supply tools and materials; whether the worker can take on other clients; and whether payment is hourly rather than by the project. No single factor decides it, but the underlying question is whether your business has the right to direct and control the work.

Getting this wrong does not eliminate your insurance obligation. It just means you have been out of compliance without realizing it, and an injury claim will surface the problem in the worst possible way.

The Written Agreement Safe Harbor

A.R.S. § 23-902(D) offers a way to document the relationship. A written agreement signed and dated by both parties creates a rebuttable presumption of independent contractor status if it confirms that the business does not supervise or control the actual work, does not require exclusive service, does not provide tools or business licenses, does not pay by the hour, does not dictate the work schedule, and does not combine operations with the contractor. The agreement must also disclose that the contractor is not entitled to workers’ compensation benefits from your business.¹

Submitting the agreement to your insurance carrier prevents premium from being collected on payments to that contractor unless someone overcomes the presumption. Be aware that the agreement is automatically void if consent was obtained through misrepresentation, fraud, or coercion; you cannot pressure a worker into signing away employee status.¹

A sole proprietor working as a contractor for your business can also waive their own coverage rights. The waiver must be signed and dated by both the sole proprietor and your insurance carrier and must state that the sole proprietor is performing work as an independent contractor and is not entitled to comp benefits. If that sole proprietor has employees of their own, they still have to cover those employees.⁵

Required Workplace Posting

Buying a policy is not the end of it. Under A.R.S. § 23-906(D), every covered employer must post a bilingual (English and Spanish) notice in a visible spot on the premises. The notice identifies your insurance carrier and policy number and tells employees that they are presumed to have accepted workers’ compensation coverage unless they file a written rejection before any injury.⁶⁷

The consequence of not posting is worse than a fine. Any employee hired while the notice is down, or while blank rejection forms are unavailable, is not considered to have accepted workers’ compensation. After an injury, that employee gets to choose between accepting comp benefits and suing you in civil court. The poster protects you as much as it informs your workforce.⁶

Businesses whose workers may be exposed to bloodborne pathogens or infectious diseases have an added obligation under Arizona Administrative Code § R20-5-164. Two additional notices, “Work Exposure to Bodily Fluids” and “Work Exposure to MRSA, Spinal Meningitis, or Tuberculosis,” must be posted right next to the standard workers’ compensation notice. Your carrier should supply them; the Industrial Commission will provide them on request.⁸

Reporting a Workplace Injury

When an employee reports a work injury, you must file an Employer’s Report of Injury with both the Industrial Commission and your insurance carrier within ten days of receiving notice. The commission strongly encourages electronic filing, and the form must be completed in full.⁹

Fatalities carry a much shorter fuse. If a worker dies from a work-related incident, you must notify the commission by phone, telegram, or electronic filing no later than the next business day after the death.⁹

On the employee’s side of the equation, a formal workers’ compensation claim must be filed with the commission in writing within one year after the injury occurred or after the worker knew (or reasonably should have known) it was compensable. Missing that deadline generally bars the claim, with narrow exceptions for workers misled by the employer or carrier or legally incapacitated during the filing window.¹⁰

Penalties for Operating Without Coverage

A.R.S. § 23-907 sets an escalating civil penalty structure that stacks on top of everything else that goes wrong when an uninsured employer gets caught:

First offense: up to $1,000.
Second offense within five years: up to $5,000.
Third or subsequent offense: up to $10,000, and the Industrial Commission can weigh the economic benefit you gained by skipping premiums as an aggravating factor.
Injunction: the commission can ask a court to shut down your operations until you obtain a policy.¹¹

If an employee is actually injured while you are uninsured, Arizona’s Special Fund pays their benefits and then comes after you for full reimbursement plus a penalty of 10% of what the fund spent or $1,000 (whichever is greater), plus interest. That reimbursement obligation carries the force of a court judgment and can attach as a lien on your property for up to eight years.¹¹

The most damaging piece may be the loss of your civil defenses. An uninsured employer sued by an injured worker cannot raise assumption of risk or contributory negligence. Proof of the injury alone creates a presumption of the employer’s negligence, and the burden shifts to you to disprove it.¹¹ For most Arizona employers, a policy is far cheaper than one uninsured claim.

1
Arizona Legislature. Arizona Revised Statutes 23-902 – Employers Subject to Chapter; Exceptions
2
Industrial Commission of Arizona. Workers’ Compensation Insurance Employers’ Frequently Asked Questions
3
Arizona Legislature. Arizona Revised Statutes 23-901 – Definitions
4
Industrial Commission of Arizona. Self-Insurance Authority Information
5
Arizona Legislature. Arizona Revised Statutes 23-961 – Methods of Securing Compensation by Employers
6
Arizona Legislature. Arizona Revised Statutes 23-906 – Liability Under Chapter or Under Common Law of Employer Securing Compensation
7
Industrial Commission of Arizona. Workers’ Compensation Law Bilingual Poster
8
Legal Information Institute. Arizona Administrative Code R20-5-164 – Human Immunodeficiency Virus, Hepatitis C, MRSA, Spinal Meningitis and Tuberculosis
9
Industrial Commission of Arizona. Employer’s Report of Injury Form
10
Arizona Legislature. Arizona Revised Statutes 23-1061 – Claims; Time for Filing
11
Arizona Legislature. Arizona Revised Statutes 23-907 – Liability of Employer Failing to Secure Compensation; Defenses