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What Is Co-Employment & How to Explain It to Your SMB Clients

Written by BBSI | Sep 2, 2026, 4:17:01 PM

Co-employment may sound like a complex legal arrangement, but for most small business owners (SMBs), it comes down to a practical division of responsibilities. The business owner still leads the company and manages employees, while a professional employer organization (PEO) supports specific HR, payroll, benefits, and risk functions. In this guide, insurance brokers will learn:

  • What co-employment means in plain language
  • Which responsibilities remain with the SMB
  • Which functions a PEO handles or supports
  • How liability and compliance responsibilities are shared
  • How to explain the model clearly to clients

It starts with understanding what co-employment actually is.

What Is Co-Employment?

Co-employment is a contractual relationship in which a small or midsize business and a professional employer organization divide specific employer responsibilities between them. The client company continues to run the business, direct employees, and make day-to-day workforce decisions. The PEO handles or supports defined administrative functions such as payroll, payroll taxes, benefits administration, HR guidance, workers’ compensation, and risk management.

The exact division of responsibilities is documented in the client service agreement. That agreement clarifies what the PEO will manage, what the business will retain, and how the two parties will work together.

Co-employment is not the same as temporary staffing or employee leasing. A PEO does not provide a new workforce or take ownership of the client’s employees. Instead, it supports the company’s existing team through an ongoing service relationship.

The simplest way to explain it is this: The business manages its people and operations. The PEO helps manage the employer administration behind them.

Who Controls the Employees in a Co-Employment Relationship?

The SMB owner remains in control of the company and its workforce. Co-employment does not prevent the owner from making everyday employment decisions.

The client company generally continues to control:

  • Who is hired, promoted, disciplined, or terminated
  • Employee schedules, job duties, and performance expectations
  • Day-to-day supervision and workplace culture
  • Pay decisions, business priorities, products, and customers
  • The direction and strategy of the organization

The PEO handles or supports a different set of responsibilities, often including:

  • Payroll processing and payroll tax administration
  • Benefits enrollment, deductions, and plan administration
  • HR policies, documentation, and employee recordkeeping
  • Workers’ compensation claims coordination
  • Safety programs and risk-management resources
  • HR technology, reporting, and administrative support

The PEO may also advise the owner on hiring, employee relations, discipline, or compliance considerations. That guidance gives an SMB access to knowledge it may not have internally, but it does not replace the owner’s authority. The owner still decides what action makes sense for the business and directs how that decision is carried out.

A useful explanation is that the SMB controls the work, while the PEO supports the employment infrastructure surrounding that work.

How Are Responsibilities and Liability Shared?

Co-employment does not mean the PEO absorbs every employer obligation or removes all liability from the SMB. Responsibilities are divided by function according to the client service agreement and the laws that apply to the relationship.

That division usually falls into three categories:

  1. Operational responsibility: The client controls the workplace, supervises employees, assigns work, and makes day-to-day business decisions.
  2. Administrative responsibility: The PEO performs the payroll, benefits, tax, documentation, workers’ compensation, or HR functions assigned to it.
  3. Shared compliance responsibility: The PEO may provide systems, guidance, and expertise, while the client must still follow sound employment practices and use those resources correctly.

Tax treatment can also depend on the structure of the arrangement. The IRS does not recognize “co-employer” as a single federal tax classification, and certified PEO relationships may carry different tax responsibilities than other PEO arrangements.

Insurance brokers should therefore avoid saying that a PEO “takes over all liability.” A more accurate explanation is that the business remains responsible for running the company and managing employees, while the PEO performs specific services and responsibilities as listed in the client service agreement.

What Does Co-Employment Look Like in Practice?

Consider a growing company with 40 employees and more than one location. The owner still hires employees, sets schedules, assigns responsibilities, manages performance, and makes decisions about compensation and business strategy. Employees continue reporting to the company’s managers, just as they did before the PEO relationship began.

Meanwhile, the PEO may provide the administrative structure needed to support that workforce. It might:

  • Help manage onboarding forms and employee records
  • Coordinate benefits enrollment and payroll deductions
  • Provide HR guidance and policy support
  • Assist with workers’ compensation claims
  • Offer safety resources and return-to-work guidance
  • Process payroll and administer payroll taxes

Suppose an employee is injured on the job. The SMB remains responsible for maintaining the workplace, reporting the incident, and cooperating with the claims process. The PEO may help coordinate the claim, communicate with the appropriate parties, and support the employee’s return to work.

The same division applies to everyday HR matters. The business makes the final operational decisions, while the PEO provides the systems, specialists, and administrative support needed to carry them out.

The SMB remains at the wheel. The PEO helps keep the workforce-support systems running.

How Should Insurance Brokers Explain Co-Employment to SMB Clients?

Insurance brokers and advisors can make co-employment easier to understand with three steps:

  1. Start with control. Reassure the client that they still manage the business, supervise employees, and make workforce decisions.
  2. Explain the division of work. Describe the PEO as supporting payroll, benefits, HR administration, workers’ compensation, and risk management.
  3. Connect it to a real problem. Tie the conversation to payroll complexity, limited HR capacity, workplace risk, multistate growth, or time pulled from core operations.

According to NAPEO, “The return on investment when a business uses a PEO, in cost savings alone, is 27 percent.”

A referral to a PEO does not mean handing the relationship away. The advisor can remain involved while helping the business gain specialized workforce support.

Make Co-Employment Easier to Explain With BBSI

Co-employment allows an SMB to retain control of its workforce while gaining support for payroll, benefits, HR administration, workers’ compensation, and risk management. The client service agreement defines how those responsibilities are divided, helping both parties understand what they manage and where they work together.

For insurance brokers, explaining that distinction clearly can help clients evaluate a PEO without fearing that they will lose control of their business. BBSI gives brokers, CPAs, and other trusted advisors a practical way to connect clients with workforce support while remaining part of the relationship. Partner with BBSI to make co-employment easier for your clients to understand and put into practice.

Quick Summary

Co-employment allows an SMB and a professional employer organization to divide specific employer responsibilities without taking operational control away from the business owner. This blog explains how HR, payroll, benefits, workers’ compensation, and compliance duties are shared, while giving insurance brokers a simple way to describe the arrangement to their clients.