How Does a PEO Work? The Co-Employment Model Explained

How a PEO Works

A professional employer organization, or PEO, takes over the day-to-day administration of human resources, payroll, benefits, and workplace compliance through a co-employment arrangement. The client company retains control over hiring, firing, and business strategy, while the PEO becomes the employer of record for tax and insurance purposes. This lets small and mid-sized companies access the same HR infrastructure that larger enterprises use.

The Co-Employment Structure

Under a PEO agreement, the client and the PEO share employer responsibilities. The client continues to manage the workforce, set pay rates, and direct daily operations. The PEO handles payroll processing, withholds and remits taxes, administers workers' compensation, and often negotiates group health insurance and retirement plans on behalf of the client's employees. Legally, the PEO is the employer of record, which means it carries the liability for employment taxes and certain workplace regulations.

Services a PEO Typically Provides

• Payroll processing and tax filing
• Benefits administration, including health, dental, and retirement plans
• Workers' compensation insurance management
• HR compliance and risk management
• Employee handbooks and policy development
• Training and development resources

What a PEO Does Not Do

A PEO does not replace the client's management team. It does not set business goals, control customer relationships, or make operational decisions. The client remains responsible for hiring, supervision, and day-to-day employee management. The PEO's role is administrative and compliance-focused, not strategic.

Who Benefits From a PEO

Small businesses with limited HR staff benefit the most, as do companies that want better benefit packages but lack the bargaining power to negotiate them alone. Industries with high regulatory burden, such as construction and healthcare, often turn to PEOs to manage workers' comp and OSHA compliance. Companies with 10 to 1,000 employees typically see the clearest return on a PEO relationship.

Costs and Considerations

PEOs generally charge a fee based on a percentage of payroll, often between 2% and 12%, depending on the scope of services and the industry. Fees may be flat per employee or tiered by service level. Before signing, businesses should compare the administrative savings against the fee, confirm which services are included, and review the contract termination terms carefully.