What Is a PEO? A Complete Guide to Professional Employer Organizations (2026)

How Does A PEO Work?

Rather than simply outsourcing HR tasks, a PEO enters into a co-employment agreement with your company. This shared responsibility model is what sets PEOs apart from other HR service providers. Here's how it works:

• Co-employment relationship: You maintain full control over your team’s daily responsibilities and business strategy, while the PEO legally shares certain employer responsibilities.
• Shared responsibilities: In a co-employment relationship, the PEO shares certain employer responsibilities for tax, payroll, and compliance purposes, while the client company maintains operational control over employees.
• Integrated HR partnership: Your internal HR team (or appointed liaison) works directly with the PEO to ensure smooth delivery of HR functions and employee support.
• Single system for HR tasks: Many PEOs offer a unified platform where payroll, benefits, and employee data are managed in one place.
• Scalable support: As your business grows or changes, the PEO can adjust its support accordingly—whether you’re expanding to new states or hiring internationally.

Professional employer organizations (PEOs) handle international payroll by simplifying compliance through centralizing salary and invoicing processes across countries.

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This structure allows you to stay focused on strategic goals while offloading time-consuming compliance and admin responsibilities to a trusted partner.

What Services Do PEOs Offer?

Organizations hire PEOs to manage a broad range of HR-related tasks, such as:

• Payroll and Tax Filing Services: Handling payroll processing, PTO management, tax compliance, and more.
• Employee Benefits Administration: Creating competitive benefits packages, including health insurance, retirement plans, and other perks.
• Regulatory Compliance: Ensuring adherence to local labor laws and tax regulations to minimize risk.
• Recruiting & Staffing: Supporting hiring, onboarding, and international recruitment.
• Employee Onboarding: Facilitating stress-free employee onboarding that is locally compliant
• Talent Management: Overseeing performance management, compensation management, and strategic employee development.
• Employee Training: Managing ongoing training through automated processes and customized programs.
• Risk and Safety Management: Identifying workplace risks to reduce liability, or managing workers’ compensation filings and requirements.
• HR Investigations: Assisting with sensitive workplace investigations, ensuring fair resolution and legal compliance.

While some simply provide consultancy and administrative services, others are built on a co-employment model where they share employer responsibilities with their client and handle a number of crucial HR functions in a co-employment relationship.

Services Typically Not Included With A PEO

Services that are not usually included with a PEO include:

• Day-to-day employee management: PEOs do not supervise employees, manage workloads, or oversee daily operations.
• Final hiring and termination decisions: While a PEO may provide HR guidance and compliance support, your company still makes all final employment decisions.
• International hiring without a legal entity: Most traditional PEOs require your company to already have a legal entity where employees are located. For international hiring without an entity, an employer of record (EOR) is often a better fit.
• Business strategy and leadership: PEOs support HR operations, but they do not replace internal leadership, management teams, or business decision-makers.
• Highly customized HR programs: Some PEOs rely on standardized systems and workflows that may limit customization for complex organizations.
• Industry-specific operational support: PEOs generally focus on HR administration and compliance rather than specialized operational consulting for your industry.
• Complete legal liability protection: While PEOs help reduce compliance risks, businesses still remain responsible for operational decisions and maintaining compliant workplace practices.

What Are the Costs Of A PEO?

PEOs usually charge based on a business’s payroll, meaning the costs can vary depending on the size of the client company. The typical cost of PEO is between 3%–6% of the total payroll. You will likely need to provide some details about your payroll in order to get an accurate quote on pricing.

Remember that PEOs are meant to lead to time savings, which ultimately saves money. Overall, businesses have reported saving on average 27% cost savings from bringing on a PEO. 

5 Benefits of Working With a PEO

PEOs can relieve administrative burdens, advise on numerous HR and compliance issues, and help organizations recruit, retain, and motivate their employees. The benefits of working with a PEO can include:

1. Reduced administrative burdens: By outsourcing HR to a PEO, businesses can significantly reduce the time and resources spent on administrative work, freeing up internal staff to focus on strategic activities.
2. Access to better benefits: PEOs can offer employees access to high-quality benefits, such as health insurance, retirement plans, and other perks, at lower costs due to their ability to pool clients and negotiate better rates with providers.
3. Improved compliance: PEOs stay up-to-date with the latest employment laws and regulations, ensuring that businesses remain compliant with federal, state, and local requirements, thereby reducing the risk of legal issues and penalties.
4. Enhanced employee support: PEOs often provide additional support services for employees, such as HR advice, conflict resolution, and access to professional development resources, contributing to a more satisfied and productive workforce.
5. Risk management: PEOs help manage risks associated with employment, such as workers' compensation claims and lawsuits, by implementing organizational policies and best practices and providing guidance on risk mitigation strategies.

Disadvantages of Working With a PEO

There can be some limitations when working with a PEO, such as:

• Loss of control: Relinquishing some control over HR functions and processes can potentially lead to decisions and practices that don’t fully align with the company's specific culture or values.
• Costs: PEO services come with fees that may be significant and need to be carefully weighed against the potential benefits.
• Dependency on PEO performance: The business becomes reliant on the PEO's performance and stability. Issues such as financial instability or service disruptions within the PEO can negatively impact the client company.
• Potential for misalignment: The PEO’s standard practices and procedures may not always match the specific needs or preferences of the client company, leading to potential conflicts or inefficiencies.
• Data security concerns: Sharing sensitive employee information with a third party involves data security risks. Businesses must ensure that the PEO has robust data protection measures in place.
• Complexity in terminating agreement: Ending a relationship with a PEO can be complex and time-consuming as it involves transitioning HR responsibilities back in-house or to another provider at the risk of disrupting business operations.

Pro Tip

The co-employment agreement can be risky is the PEO and the client company don’t align on things like how to take employment decisions. Being co-employers means for example that if the client company wants to terminate an employee, the PEO needs to review and approve it. — Alice Ferretti, Founder, HumansR

• Employee perception: Employees might feel uncertain or disconnected knowing that an external organization manages their employment matters, which can impact morale and loyalty if not managed carefully.
• Limited customization: PEOs often have standardized service packages that may not fully accommodate the unique needs of every business, resulting in less flexibility.

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What Kinds of Companies Benefit From Using a PEO?

While professional employment organizations offer myriad benefits, they're not for every organization. If one or more of the following describes your org, you may be a good candidate to work with a PEO:

• Small to Mid-Sized Businesses
• Start-ups
• Companies with limited hr expertise
• Businesses looking to scale rapidly
• Organizations with a high employee turnover
• Companies needing streamlined hr processes
• Industries with high regulatory compliance demands
• Businesses seeking competitive employee benefits
• Organizations without an established hr infrastructure
• Businesses operating in multiple states or internationally
• Companies looking for risk management support.

Before approaching a PEO, it's advantageous to consult with your leadership team and audit how your existing HR ops are working and their strengths and weaknesses. This way, you'll be better prepared to approach a PEO with clear goals for the business relationship.

Professional Employer Organization (PEO) vs. Employer of Record (EOR): Key Differences

The biggest difference between a PEO and EOR is that a PEO works through a co-employment model, while an EOR becomes the legal employer on behalf of the client company.

Here are 8 key aspects in which a PEO and an EOR differ.

Aspect	PEO	EOR
Employment Model	Co-employment	EOR is the legal employer
Legal Entity Requirement	Company must already have a legal entity	No legal entity required
Primary Use Case	HR outsourcing and compliance support	International hiring and expansion
International Hiring	Limited	Core service offering
Employer Liability	Shared between company and PEO	EOR assumes employer liability for employment administration
Geographic Reach	Usually domestic or limited	Global and multi-country hiring
Best For	Small and mid-sized businesses with entities	Companies hiring internationally without entities
Typical Cost	Lower overall	Higher due to global infrastructure and compliance

PEO vs. ASO vs. Staffing Firm: What's The Difference?

Professional employer organizations (PEOs), administrative services organizations (ASOs), and staffing firms all help businesses manage workforce operations, but they serve very different purposes.

Aspect	PEO	ASO	Staffing Firm
Primary Purpose	Outsource HR, payroll, benefits, and compliance	Support HR administration without co-employment	Recruit and supply workers
Employment Model	Co-employment	Company remains sole employer	Agency may employ temporary workers
Legal Employer	Shared between company and PEO	Company	Usually staffing agency for temp workers
Payroll & Benefits	Included	Often included	Limited or temporary-worker focused
Compliance Support	Extensive	Administrative support only	Hiring and worker compliance
Recruiting Services	Limited	Limited	Core service offering
Best For	Small and growing businesses needing full HR support	Companies wanting HR support but more control	Temporary, seasonal, or project-based hiring
Typical Worker Type	Long-term employees	Long-term employees	Temporary or contract workers
Pricing Structure	Per employee or % of payroll	Flat admin/service fee	Markup on employee wages
Level of Employer Control	Moderate	High	Lower for temp staffing

Which Option Is Best?

• A PEO is usually the best fit for companies that want outsourced HR infrastructure and compliance support.
• An ASO is better for businesses that want HR administration help while keeping full employer responsibility internally.
• A staffing firm is the better option for organizations focused primarily on recruiting or temporary workforce needs.

PEOs vs. In-House HR: Key Differences

While both PEOs and in-house HR teams help businesses manage payroll, benefits, compliance, and employee support, they do so in very different ways. A PEO provides outsourced HR infrastructure through a co-employment model, while an in-house HR team manages all HR functions internally.

In general:

• In-house HR is usually better for larger organizations that want more control, customization, and dedicated internal HR leadership.
• PEOs are often a better fit for smaller and growing businesses that want HR support without building a large internal team.

Aspect	PEO	In-House HR
HR Management Model	Outsourced HR support	Fully internal HR management
Payroll & Benefits	Managed by PEO	Managed internally
Compliance Support	Included	Handled internally or through legal advisors
HR Technology	Usually included	Purchased and managed separately
Internal HR Staffing Needs	Reduced	Requires dedicated HR staff
Scalability	Easy to scale quickly	Often requires additional HR hires
Level of Control	Moderate	Full control
Customization	More standardized	Highly customizable
Typical Cost Structure	Per employee or % of payroll	HR salaries + software + admin costs
Best For	Small and growing businesses	Larger organizations with mature HR operations

10 Best Professional Employer Organizations

To find the right PEO service for you, check out our pick of the best professional employer organizations. Here’s the shortlist below:

Clicks on the links below may earn a commission, which supports our independent testing and review of software and services. Learn more about how we stay transparent.

1. 1. Deel Hire — Best across all 50 states and beyond
2. 2. Remote People — Best for global workforce management
3. 3. Rippling — Best for global payroll management
4. 4. Justworks — Best for small US-based teams
5. 5. Multiplier — Best for globally distributed teams
6. 6. ADP TotalSource — Best for accessing benchmarked salary data
7. 7. TriNet — Best for U.S. businesses with up to 500 employees
8. 8. Paychex PEO — Best for its industry reputation
9. 9. Remote — Best for self-service HR tools
10. 10. Atlas HXM — Best for global mobility support

Show More (2)

How to Choose a Professional Employer Organization

Since a PEO will effectively act as an arm of your business, it stands to reason that the PEO you end up engaging with should be chosen carefully. 

Here's a comprehensive process for whittling down your options and finding a great fit:

1. Assess your business need

• Identify the specific HR services your business requires (e.g., payroll and benefits administration) and determine the level of support needed in these areas.

2. Research potential PEOs

• Look for PEOs with experience in your industry.
• Check their client reviews and testimonials to gauge their reputation and service quality.

Pro Tip

I recommend choosing a PEO your HR team can collaborate with easily—because even with a PEO, you’ll still need at least one HR person to act as a liaison between the PEO and your staff. — Alice Ferretti, Founder, HumansR

3. Compare services and costs

• Evaluate the range of services offered by each PEO or work with a PEO broker who can compile this information on your behalf.
• Understand their pricing structure (e.g., flat fee, per-employee fee) and compare the cost-effectiveness.

4. Check accreditation and compliance

• Ensure the PEO is accredited by relevant bodies like the Employer Services Assurance Corporation (ESAC).
• Verify their compliance with local and federal employment laws.

5. Review employee benefits offered

• If applicable, compare the quality and range of employee benefits each PEO offers.
• Assess how these benefits align with your workforce's needs and how they might aid in employee retention and recruitment.

6. Evaluate technology and infrastructure

• Check if the PEO provides robust technology solutions for payroll, record management, and employee self-service portals.
• Assess the ease of integration with your existing systems.

7. Understand the scope of liability

• Clarify what liabilities are shared and what remains the responsibility of your business.
• Discuss the PEO’s practices in handling compliance issues and legal disputes.

8. Ask for references and case studies

• Request references or case studies from businesses similar to yours.
• Learn from their experiences and the impact of the PEO services on their operations.

9. Review the service agreement carefully

• Thoroughly read the contract or service agreement.
• Pay special attention to the terms of service, cancellation policy, and any hidden fees.

10. Plan for transition

• Develop a clear plan for transitioning to the PEO.
• Ensure there are strategies in place for communicating changes to employees and integrating the PEO’s services with your current operations.

11. Evaluate continuously

• After selection, regularly assess the PEO’s performance. A good method is by gathering employee feedback.
• Ensure they continue to meet your evolving business needs and maintain a strong partnership.

Misconceptions About PEOs

Now that you know what a PEO does, let’s clear up what it doesn’t do. There are still a few lingering myths that can make businesses hesitant to explore this model—so let’s break them down:

Myth: PEO Certifications Don’t Matter
Fact: Accreditation is a key quality signal. Certified PEOs, such as those recognized by the Employer Services Assurance Corporation (ESAC), meet strict standards for ethical practices, operational excellence, and financial stability—giving you peace of mind in your partnership.

Myth: PEOs Take Over Hiring and Firing
Fact: Partnering with a PEO doesn’t mean giving up control over your workforce. Your company continues to make all key decisions around hiring, promotions, and terminations. The PEO simply handles the administrative side, freeing you to focus on your people and business strategy.

Myth: PEOs Limit Your Benefits Options
Fact: PEOs often expand benefit offerings. Through collective buying power, they can provide access to high-quality benefits typically reserved for larger corporations—like health, dental, vision, retirement plans, and employee assistance programs.

6 Trends in PEO Services and Technology

PEO companies are evolving by shifting their service models to meet modern client demands while incorporating advanced technology into their PEO software. Key trends include:

1. Specialized Services: More tailored HR solutions for SMEs and specific industries, moving away from generic offerings.
2. AI and Machine Learning: Streamlining HR tasks like payroll and benefits while enhancing predictive analytics.
3. Automation: Compliance and risk management are increasingly automated for accuracy and efficiency.
4. Blockchain: Some PEOs are exploring blockchain for secure payroll and verification processes, enhancing transparency in HR operations.
5. Global Expansion Capabilities: More PEOs are expanding their reach or partnering with EOR providers to support international hiring without the need for multiple vendors.
6. Employee Experience Tools: Modern PEO platforms now include self-service portals, mobile apps, and engagement tools to improve the employee experience and support remote/hybrid teams.

These advancements position PEOs to offer flexible, tech-driven solutions to meet their client's needs.

Other HR Services Businesses Often Outsource

It's possible that your organization only needs to outsource one or two areas of your people management operations. If that's the case, you might consider engaging with a firm that specializes in outsourcing specific HR services, such as:

• Payroll Services: These firms take care of payroll processing, including tax deductions, pay slip generation, and compliance with tax laws.
• Recruitment process outsourcing (RPO): RPO service providers can take over your entire hiring process or specific parts of the recruitment process according to your needs.
• Employee benefits administration: These services allow you to outsource the management of employee benefits such as health insurance, retirement plans, and wellness programs.
• Training and development: Many providers offer professional development and training programs to help your employees develop new and existing skill sets.
• HR consulting: There's always the option of engaging external HR experts for strategic advice, often for specific projects or to address particular challenges.
• Employee assistance programs (EAP): Employee support service providers can be contracted to offer services that complement standard healthcare plans, including counseling, mental health support, and work-life solutions.
• Compliance management: Since compliance can be a legal minefield, you may wish to seek external expertise to ensure adherence to employment laws and regulations.
• HR Technology Services: These firms support the management of HR-related software and technology systems, such as HR information systems (HRIS).
• Performance management: You can hire external services to design and implement performance appraisal systems and processes.
• HR audits: Consider engaging a firm to conduct audits of HR policies, practices, and procedures to ensure effectiveness and compliance.

What Sets PEOs Apart?

While there are many ways to outsource HR, PEOs offer a uniquely integrated approach. Here’s how they differ:

• Co-Employment Model: A defining feature of PEOs is co-employment. You retain control over daily operations, but the PEO shares employer responsibilities—such as tax reporting, wage processing, and benefits administration—on your behalf.
• Beyond Admin Support: Unlike payroll companies or software providers, PEOs combine HR expertise with operational execution. They don’t just provide tools—they manage the work and ensure compliance at the state and federal level.
• Built for Growth: PEOs help small to mid-sized businesses looking to scale their business. Instead of building an HR department from scratch, you can grow with flexible support that adapts as your team expands.

FAQs

What are Certified PEOs?

A Certified Professional Employer Organization (CPEO) is a specific designation by the IRS for PEOs that meet rigorous, federally regulated standards. CPEOs undergo a thorough certification process by the IRS, ensuring they meet requirements related to financial responsibility, tax compliance, and other regulatory criteria.

The advantages of working with a Certified PEO (CPEO) versus a standard PEO include:

• IRS Certification: CPEOs must pass stringent IRS requirements to ensure compliance.
• Tax Liability Protection: CPEOs assure against certain federal employment taxes.
• Financial Transparency: CPEOs are subject to financial audits.
• Credibility and Trust: CPEO certification demonstrates a higher level of credibility.
• Reduced Tax Risks: CPEOs can reduce the risk of tax-related issues for client companies.

 

What are ESAC Accredited Professional Employer Organizations?

ESAC (Employer Services Assurances Corporation) accreditation is another form of PEO certification. EOs that are ESAC accredited have undergone a rigorous process to meet specific financial, ethical, and operational standards set by ESAC.

ESAC Accredited PEOs offer many of the same benefits as CPEOs. The key differences are:

Certification Body

CPEO: Certified by the IRS based on federal tax compliance and financial standards.

ESAC: Accredited by the Employer Services Assurance Corporation for operational, financial, and ethical standards.

Focus of Accreditation

CPEO: Focuses on tax compliance and financial responsibility.

ESAC: Emphasizes financial stability, ethical practices, and operational standards.

Government Recognition

CPEO: Recognized and regulated by the IRS.

ESAC: Focuses on broader compliance aspects, including financial, ethical, and operational standards.

Scope of Assurance

CPEO: Primarily focuses on tax-related assurances and financial aspects.

ESAC: Broader focus covering financial stability, ethical practices, and operational standards.

Client Protections

CPEO: Provides certain protections related to federal employment taxes.

ESAC: Offers client protections through adherence to higher operational and ethical standards.

Emphasis on Compliance

CPEO: Strong emphasis on IRS compliance and tax-related matters.

ESAC: Focuses on broader compliance aspects including financial, ethical, and operational standards.

CPEOs vs. ESAC Accredited PEOs

How do PEOs make money?

PEOs make money through fee structures based on the services they provide to their client companies. Here are common ways PEOs generate revenue:

1. Administrative fees: PEOs typically charge a service fee, often calculated per employee or as a percentage of total payroll. This fee covers the cost of managing HR tasks such as payroll processing, benefits administration, and HR compliance.
2. Insurance commissions: PEOs may earn commissions or receive a portion of the premiums from insurance products they offer, such as health insurance, workers’ compensation, and retirement plans. They often negotiate better rates by pooling employees from multiple client companies.
3. Markup on services: PEOs might charge a markup or earn revenue by providing certain services, such as HR consulting, training programs, or additional HR-related tools and technologies.
4. Interest income: PEOs may earn interest by temporarily holding funds before distributing payroll or taxes to appropriate entities. However, regulations often limit the duration and use of these funds.
5. Ancillary service charges: PEOs can generate revenue through additional services not included in the standard package, such as employee training, background checks, or specialized HR consulting.

How will a PEO partnership impact our day-to-day operations?

Partnering with a Professional Employer Organization (PEO) can significantly impact your day-to-day operations in several ways:

1. Streamlined HR tasks: A PEO can handle various HR functions like payroll processing, benefits administration, and compliance tasks, freeing up your time to focus on core business activities.
2. Access to expertise: A PEO affords you access to HR professionals who offer expertise in navigating complex employment laws and regulations—ensuring compliance and reducing the risk of errors.
3. Improved employee benefits: PEOs often offer access to better employee benefits and cost-effective insurance plans by pooling employees from multiple client companies.
4. Enhanced HR technology: Many PEOs provide access to advanced HR software and technology, streamlining processes like time tracking, payroll, and employee self-service portals.
5. Focus on strategic growth: With routine HR tasks managed by the PEO, your company can focus on strategic growth initiatives, innovation, and enhancing the overall business strategy.
6. Co-employment relationship: The co-employment model means the PEO shares employer responsibilities, impacting certain HR decisions that might require coordination with the PEO. There are also certain co-employment risks to be aware of.

Change in administrative procedures: Your company might need to adapt to new administrative procedures or systems implemented by the PEO, affecting how certain HR-related tasks are executed.

What is the difference between a PEO in the USA vs PEOs abroad?

The primary differences between PEOs in the USA and those abroad center around regulations and market focus:

• Regulatory Environment: U.S. PEOs focus heavily on complying with federal, state, and local employment laws, which vary across states. Abroad, PEOs must navigate complex international labor laws, tax regulations, and cultural differences.
• Service Offerings: International PEOs often offer Employer of Record (EOR) services for companies hiring across borders, which is less common with U.S.-based PEOs that deal mostly with domestic employment.
• Market Focus: U.S. PEOs typically serve small to mid-sized businesses, while international PEOs may cater more to companies expanding globally.

Will I lose control over my employees if I use a PEO?

No. With a PEO, your company still manages employees’ day-to-day work, performance, responsibilities, and business operations.

The PEO mainly supports administrative HR functions such as payroll, benefits, compliance, and tax management through a co-employment arrangement.

Should I use a PEO if I already have an HR manager?

Many companies use a PEO to support their internal HR team rather than replace it.

A PEO can help HR managers by handling:

• Payroll administration
• Benefits management
• Compliance support
• HR technology
• Multi-state employment requirements

This allows internal HR teams to focus more on strategy, employee experience, and business growth initiatives.

Is my business too small to use a PEO?

Here are 8 key aspects in which a PEO and an EOR differ.Not necessarily. PEOs are often most beneficial for small and mid-sized businesses that need HR support without building a large internal HR department.

Many startups and growing companies use PEOs to access:

• Better employee benefits
• Payroll support
• Compliance expertise
• HR infrastructure

Some PEOs may have minimum employee requirements, but many are designed specifically for smaller businesses.