NAPEO estimates the PEO industry grew a very robust $10 billion to $81 billion in gross revenues in 2010. (The industry defines gross revenues as the total of its clients' payrolls and the fees PEOs charge them for taking on their human-resource activities.) Small- and medium-sized businesses outsource to PEOs everything from administering the payroll and paying employment related taxes, to risk management, recruiting, providing health benefits, and securing workers' compensation coverage.

A relatively youthful industry — around 30 years old — PEOs have vast room to grow. The PEO industry has barely scratched the surface of the potential market, but the current projected growth rate for PEOs, coupled with their high client retention rates, supply ample evidence of an industry on the move.

The average client of NAPEO members is a small business with an average of 19 employees.* Increasingly, larger businesses are signing up, too. Clients range from accounting firms to high-tech companies to manufacturers to government agencies.

PEOs and clients develop long-term relationships. PEOs that are members of NAPEO retain 86 percent of clients for a year or more.* They allow clients to "reduce costs and free up time to devote to revenue generating activities, improvements that can be instrumental to gaining competitive advantage," according to research by the Society of Human Resource Management Foundation.

Professional employer organizations (PEOs) enable clients to cost-effectively outsource the management of human resources, employee benefits, payroll and workers' compensation. PEO clients focus on their core competencies to maintain and grow their bottom line.

Once a client company contracts with a PEO, the PEO will then co-employ the client's worksite employees. In the arrangement among a PEO, a worksite employee and a client company, there exists a co-employment relationship in which both the PEO and client company have an employment relationship with the worker. The PEO and client company share and allocate responsibilities and liabilities. The PEO assumes much of the responsibility and liability for the business of employment, such as risk management, human resource management, and payroll and employee tax compliance. The client company retains responsibility for and manages product development and production, business operations, marketing, sales, and service. The PEO and the client will share certain responsibilities for employment law compliance. As a co-employer, the PEO will often provide a complete human resource and benefit package for worksite employees.

Business owners want to focus their time and energy on the "business of their business" and not on the "business of employment." As businesses grow, most owners do not have the necessary human resource training; payroll and accounting skills, the knowledge of regulatory compliance, or the backgrounds in risk management, insurance and employee benefit programs to meet the demands of being an employer. PEOs give small-group markets access to many benefits and employment amenities they would not have otherwise.

No. The client retains ownership of the company and control over its operations. As co-employers, the PEO and client will contractually share or allocate employer responsibilities and liabilities. The PEO will generally only assume responsibilities and liabilities associated with a "general" employer for purposes of administration, payroll, taxes and benefits. The client will continue to have responsibility for worksite safety and compliance. The PEO will be responsible for payroll and employment taxes, will maintain employee records and reserves a right to hire and fire. Because the PEO also may be responsible for workers' compensation, many PEOs also focus on and improve safety and compliance. In general terms, the PEO will focus on employment-related issues and the client will be responsible for the actual business operations.

PEOs do not supply labor to worksites. PEOs supply services and benefits to a small business client and its existing workforce. PEOs enter into a co-employment arrangement typically involving all of the client's existing worksite employees in a long-term relationship, and sponsor benefit plans for the workers and provide human resources services to the worksite employer. In most cases, the PEO provides access to health insurance, retirement savings plans, and other critical employee benefits for the worksite employees of a small business client. If a PEO relationship is terminated, the workers’ co-employment arrangement with the PEO ceases, but they will continue as employees of the client. By comparison, a leasing or staffing service supplies new workers, usually on a temporary or project-specific basis. These leased employees return to the staffing service for reassignment after completion of their work with the client company. Some define employee leasing as temporary employment arrangement where one or more workers selected by the leasing or staffing entity are assigned to a customer frequently for a fixed period of time or for a specific project. . Upon termination of the staffing or leasing company arrangement, the worker has no continuing employment relationship with the client. Historically, leasing terminology was used to describe what has evolved into PEO relationships. Some older state statutes governing PEOs still use the leasing terminology, contributing to the confusion about PEOs.

It is estimated that 2-3 million Americans are currently co-employed in a PEO arrangement. The average PEO has grown more than 20 percent per year for each of the last six years, according to a survey of NAPEO members. About 700 PEOs that offer a wide array of employment services and benefits are operating today in 50 states. The PEO industry generates approximately $68 billion in gross revenues annually. PEOs have an 88 percent client retention rate due to strong client satisfaction. NAPEO member companies are estimated to account for more than 91 percent of the industry's gross revenues.

The PEO's economy of scale enables each client company to lower employment costs and increase the business's bottom line. The client can maintain a simple in-house HR infrastructure or none at all by relying on the PEO. The client also can reduce hiring overhead. The professionals at the PEO can provide critical assistance with employer compliance, which helps protect the client against liability. In many cases, the client can pay a small up-front cost for a significant technology and service infrastructure or platform provided by the PEO. In addition, the PEO provides time savings by handling routine and redundant tasks for its clients. This enables the business owner to focus on the company's core competency and grow its bottom line.

PEOs assume responsibility and liability for payment of wages and compliance with the rules and regulations governing the reporting and payment of federal and state taxes on wages paid to its employees. PEOs have long established their role as reporting income and handling withholding, FICA and FUTA. In 2002, the IRS issued guidance confirming the ability of PEOs to offer qualified retirement benefits.

As the employer for employment tax and employee benefits, PEOs assume responsibility and liability for payment of state unemployment taxes, and most states recognize the PEO as the responsible entity. In those states that require the PEO to report unemployment tax liability under its clients' account numbers, the PEO can still manage this responsibility.

As employers, both the client and the PEO have compliance obligations. However, PEOs provide worksite employees with coverage under many employment laws and regulations, including federal, state, and local discrimination laws, Title VII of the 1964 Civil Rights Act, Age Discrimination in Employment Act, ADA, HIPAA, Equal Pay Act, and COBRA. In many cases, these laws would not apply to workers at small businesses without the PEO relationship, since many statutes have exemptions based upon the number of workers in a work force. Once included in the PEO's workforce, the workers are protected by these laws.

No. PEOs work equally well in union and non-union worksites. The National Labor Relations Board (NLRB) recognizes that in co-employment relationships, worksite employees are appropriately included in the client employer's collective bargaining unit. Where a collective bargaining agreement exists, PEOs fully abide by the agreement's terms. PEOs endorse the rights of employees to organize, or not organize, under state and federal laws.