Professional Employer Organization (PEO) services from ADP

A PEO helps businesses reduce their HR and payroll administrative burden, stay ahead of compliance requirements and offer support to employees more effectively. ADP TotalSource®, the nation's largest IRS-certified (CPEO) and ESAC-accredited PEO, supports businesses with 5 to 1,000+ employees across all 50 states.

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What is a PEO?

A PEO is a strategic HR partner that helps manage payroll, benefits, HR compliance and other employer responsibilities through co-employment, a relationship built on shared duties and shared risk. You stay fully in control of day-to-day operations and employee decisions, while the PEO takes on the administrative HR load, including:

Payroll processing and employment tax administration
Employee benefits access and administration
HR compliance guidance and support
Workers' compensation coverage and claims management

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What is ADP’s PEO?

ADP’s PEO solution is designed to integrate seamlessly with small and midsized businesses, providing HR, benefits, compliance and workers’ comp — all under one umbrella. You also get dedicated support from an HR business partner, your go-to HR expert.

The knowledge you need — in your corner

All ADP’s PEO clients work directly with a dedicated HR business partner, a credentialed HR professional who knows your business, your goals and your team. They provide ongoing strategic guidance, day-to-day support and a customized HR plan tailored to where you are and where you're going.

One-on-one guidance when you need it
Help with day-to-day decisions like compliance questions, addressing turnover and tricky employee situations
Customized plan for your HR goals and strategy

Two coworkers in an office setting having a friendly conversation over coffee, with a checkmark banner reading: Why a PEO works for portfolio companies

HR solutions that move with you

ADP TotalSource is powered by technology that combines payroll, benefits, HR, compliance, time tracking, reporting, onboarding and talent management in one platform.

AI-powered insights and reporting that help turn workforce data into informed business decisions
Employee self-service tools that give employees convenient access to pay, benefits, tax documents and HR support
Built-in compliance support designed to help businesses navigate changing regulations and multistate requirements
Scalable technology that grows alongside your business, from a handful of employees to hundreds
Mobile-first experience that keeps employees connected anytime, anywhere

The confidence to handle anything

ADP’s PEO was built to be your single-stop answer for all things HR. It allows you to efficiently solve any HR issue sent your way — and lets you do it all from the comfort of a single platform.

Onboarding
Payroll
Compliance
Benefits
Risk and safety

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Choose a trusted partner

There are significant advantages to partnering with a certified PEO like ADP’s:

Certified PEOs meet all the rigorous background, financial and reporting requirements set by the IRS
This certification ensures financial protections and tax benefits to PEO clients that users of non-certified PEOs do not necessarily receive
ADP’s PEO helps ensure your federal employment taxes are paid

Smiling businessman in a blazer, with ESAC Accredited and IRS certification badges displayed alongside him

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Certified PEO (CPEO)

What is a certified PEO?

ADP’s PEO is backed by the industry’s toughest certifications. It is among approximately 12% of PEOs with IRS-certification (CPEO)^1,2 and 6% of PEOS with ESAC-accreditation³, giving your business stronger financial protections and less risk.

Is a PEO right for your business?

Here are some ways to know that you might be ready for a PEO:

You have an HR team (or HR person) but need to reduce administrative burden so they can be more strategic with their time.
You don't have HR, and managing all the requirements on your own has become too time-consuming and risky.
You need help navigating complex labor laws and regulations to minimize risk and stay compliant.
You are operating in multiple states or growing and thinking about expanding to other state
You want access to competitive benefits packages to attract and retain top talent
You want a single integrated solution to handle HR, along with expert guidance available whenever and wherever you need it

A PEO might not be right for your business if:

You already have a strong, well-staffed, in-house HR team
You have the internal resources and expertise to manage HR administration and strategy on your own
You only need technology to support HR and payroll processes, rather than a full HR solution
Your business has low HR complexity or carries little risk

How does ADP’s PEO work?

No time for HR and payroll work? No problem. You can get dedicated, all-in-one payroll, HR and tax support from ADP’s PEO, and the freedom to finally focus on what matters most.

With ADP’s PEO, the nation's largest, we'll:

Take the time to understand the nuances of your business, along with its unique challenges
Design an HR plan that works best for you and your employees
Consolidate vendors and streamline processes to help your business run more efficiently
Become an extension of your team by providing day-to-day support plus ongoing strategic HR guidance

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What can a PEO do for your business?

PEOs take on the administrative weight of HR requirements, freeing up real time and budget for small and midsized businesses to reinvest in growth. How they specifically help depends on where your business is now.

Early-stage growth: A PEO helps you put the right HR foundation in place, supporting you with payroll, compliance and benefits, so you can focus on hiring and growing without needing a full HR department.
Scaling and complexity: A PEO brings the expertise and processes to manage compliance, streamline operations and support a better employee experience as HR and payroll tasks become more complex, especially with multi-state employees.
Rapid growth and expansion: A PEO helps unify fragmented HR tools, keep pace with compliance as requirements grow and support consistent processes as your workforce scales.
Mature, multi-state operations: A PEO helps simplify operations by managing benefits, payroll, and employee support across locations, reducing risk, improving efficiency, and freeing your team to focus on strategy and growth.

How much does a PEO cost?

PEO pricing depends on your business and workforce, so there's no one-size-fits-all rate. Factors like employee count, payroll, locations, industry and benefits needs all affect cost.

When comparing PEOs, look beyond the administrative fee and consider the total cost. Benefits, workers' compensation and other services may be included or billed separately depending on the provider. With ADP TotalSource, workers' compensation is included in the service fee rather than added later as a separate charge.

The ROI of partnering with a PEO

Research from the National Association of Professional Employer Organizations (NAPEO)** shows that businesses working with a PEO often see measurable gains in growth, stability, and workforce outcomes.

Employee Retention
12%
Lower employee turnover for PEO clients compared to businesses without a PEO.
Business Survival
50%
Less likely for PEO clients to go out of business compared to non-PEO businesses.
Return on Investment
27%
Average return on investment businesses see from partnering with a PEO.

What ADP’s PEO clients say

“The biggest benefit of ADP TotalSource is the peace of mind that we are keeping all of the important plates spinning and that we have technical expertise we can call on and trust.”
Name
Chris Thorn
Title
Chief of Program and Partnerships
Company
Partners In School Innovation
Employees
11
“After a sustained run of poor customer service with our prior payroll provider, we made the decision to move to ADP. It was a complex lift under tight deadlines, but it has been executed exceptionally well.”
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Name
Dean Friders
Title
Chief Solutions Officer
Company
Work Health Solutions
Industry
Health Care
Employees
120
“I don’t have to worry about internalizing compliance functions. If we didn’t have ADP’s external expertise, it would be catastrophic.”
Name
Cesar Zapata
Title
HR VP
Company
Lehigh White Cement
Industry
Manufacturing
Employees
208
“Tax compliance is very, very difficult. When you have employees in different states than your home state, it makes it exponentially more difficult. It’s nothing short of impossible without the partnership of ADP TotalSource.”
Name
Mike Wagner
Title
Vice President
Company
Quality Logo Products
Industry
Professional services
Employees
100
“What made ADP TotalSource so attractive to a company of our size was its efficiency, integration and cost. We’ve been able to reduce costs in certain areas of our organization, such as workers’ comp, and we’ve also reduced costs in the benefits administration area.”
Name
Nicole Wagner
Title
HR & Payroll Director
Company
Wickham Tractor
Industry
Retail
Employees
96

Awards and recognition

Highest User Adoption - Small Business
Summer 2026
GetApp Category Leader
ADP TotalSource®
2025
Leader - Small Business
Summer 2026
IRS Certified PEO*
ADP TotalSource®
2018-present
Contact Center of the Year - ADP MyLife Advisors
ADP Outsourcing
2022-2025
#1 PEO for Small Business Owners
2026
ESAC Accreditation
ADP TotalSource®
1995-present
Software Advice FrontRunners
2026

Frequently asked questions about PEOs

When selecting a Professional Employer Organization, evaluate the provider's financial stability, credentials, longevity, compliance expertise, service model, and technology. Key factors to consider include:

IRS Certification and ESAC Accreditation: A certified PEO (CPEO) has met rigorous IRS financial and reporting requirements, providing clients with specific tax benefits and financial protections. An ESAC-accredited PEO is the gold standard for PEO reliability and financial assurance. ADP TotalSource is an IRS-certified and ESAC-Accredited PEO.
Dedicated HR Support: Service models vary widely. Some PEOs rely on general call centers, while others provide dedicated specialists. ADP TotalSource assigns each client a credentialed HR Business Partner (HRBP) for ongoing strategic support.
Comprehensive Benefits Offering: Evaluate the breadth and quality of the benefits package, including healthcare, retirement plans, and ancillary benefits for the states where you have employees. A strong PEO should provide access to competitive benefits with expert guidance on plan selection and administration. It should also offer you multiple plan choices in each state.
Scalable Technology: Look for an intuitive platform that integrates HR, payroll, benefits, and time tracking in one system. ADP TotalSource provides an all-in-one platform with employee self-service and a top-rated mobile app.

Yes, ADP TotalSource provides comprehensive HR, payroll, and tax compliance support across all 50 U.S. states. This is critical for businesses that operate in or employ people in multiple states. Our compliance experts help you manage:

State-Specific Labor Laws: We proactively monitor and help you adapt to changing local, state, and federal employment regulations.
Payroll Tax Filings: ADP handles multi-state employment tax calculations on your behalf.
Risk and Safety: We provide workers' compensation insurance coverage and claims management regardless of where your employees reside.

Yes, your employees will likely notice a positive upgrade in their overall experience. While you continue to manage day‑to-day responsibilities like hiring, scheduling, and setting pay, ADP TotalSource works with you to help elevate the employee experience through:

Better Benefits: Employees gain access to high-quality health insurance, retirement plans, and exclusive corporate perks.
User-Friendly Technology: Employees can easily access pay stubs, manage benefits, and request time off through the top-rated ADP mobile app and self-service portals.
Faster Support: Employees get quick, accurate answers to their HR and benefits questions through our dedicated and award winning MyLife Advisors.
Improved Onboarding Experience: New hires experience a smoother, more professional onboarding process with digital paperwork, automated workflows, and clear guidance from day one.

Co-employment is a shared employment arrangement between a business and a PEO, each with defined responsibilities. You retain control of day-to-day operations, hiring decisions and employee management, while the PEO handles administrative HR functions like payroll, benefits and compliance. This structure gives small and midsized businesses access to competitive benefits, workers' compensation and talent support, plus HR expertise, all in one place, without you giving up control of your workforce. Co-employment falls under HR outsourcing, but it is not the same as an employer of record (EOR).

No. A PEO doesn't make hiring, firing, scheduling or pay decisions for your business, and it doesn't change how you run day-to-day operations or shape your company culture. Those decisions stay completely with you, while the PEO takes on the administrative HR workload behind the scenes.

PEOs and EORs both help manage HR and payroll, but they're built for different situations. A PEO like ADP’s partners with your business through co-employment, where you retain control of day-to-day operations and employee decisions, while the PEO shares responsibility for payroll, benefits and workers' compensation, plus HR compliance guidance. This suits U.S. businesses that want to scale HR support as they grow. An EOR becomes the legal employer of your workers, typically in countries where you lack a legal entity, handling contracts, payroll, taxes and local compliance. EORs support international employment, whereas PEOs support U.S. employees.

An ASO offers many of the same administrative HR services as a PEO — payroll, benefits support, compliance guidance — but without the shared-employer relationship. That means an ASO typically can't provide the same access to large-group benefits plans or take on the same employment-related liability that comes with a PEO's co-employment model.

Think of a PEO as instant infrastructure for your organization. Partnering with ADP’s PEO gives you access to a full team of experts across HR disciplines, best-in-class technology, proven processes, compliance monitoring, benefit plan design, and payroll processing and tax filing. You could hire for all of that in-house, but it would come at a much higher cost. With ADP’s PEO, the people, processes and technology work together as infrastructure personalized for your business.

Payroll software handles the mechanics of paying your employees, but it doesn't manage benefits administration, compliance guidance, HR support or workers' comp the way a PEO does. A PEO includes payroll as part of a broader, service-backed HR solution.

When you leave a PEO, your business becomes solely responsible for setting up and administering its own benefits plans, so you'll need to secure new coverage through another provider. It's worth planning that transition with your HR team or new provider ahead of time to avoid a coverage gap for your employees.

Depending on your size, chances are a PEO is a good fit for your business. ADP’s PEO supports businesses with as few as five employees and as many as 1,000+. A PEO’s value increases at the point where HR, benefits and compliance begin to grow in complexity.

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*The IRS does not endorse any particular certified professional employer organization. For more information on certified professional employer organizations, go to www.irs.gov.

**June 2026 NAPEO: https://napeo.org/intro-to-peos/industry-research-data/

IRS active CPEO list (the countable PDF): https://www.irs.gov/pub/irs-sbse/active-cpeos.pdf - dates, entity counts, Rippling/Gusto absence
NAPEO Industry Overview (500 PEOs): https://napeo.org/intro-to-peos/industry-overview/
Based on a count of ESAC’s state by state accredited PEO directory, July 2026, counting each PEO once. https://www.esac.org/Business/find-a-peo

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Professional Employer Organization (PEO) services from ADP

What is a PEO?