How to Make HR-PEO Partnerships Succeed

Economic uncertainty and rising healthcare costs are now the top concerns for business leaders, according to a 2026 survey from the National Association of Professional Employer Organizations (NAPEO).

As those pressures increase, more companies are expressing interest in PEOs to stabilize costs and offload administrative risk. In fact, 87% of non-PEO users say they’re considering one, the survey found. For many employers, that means figuring out how to make an HR-PEO partnership work.

The reality is, PEOs are no longer limited to one-off or situational use – they’ve become an established option for mid-sized employers. More than 230,000 U.S. businesses now use PEOs, representing about 15% of employers with 10 to 499 employees, according to a separate NAPEO study.

As more companies adopt PEOs, the question has become less about whether to use one and more about how HR and PEO teams can work together.

We talked to Justin Mincks from BestFit PEO Solutions for his perspective on HR-PEO partnerships. He shared what works, what fails and what helps partnerships stick. 

Why an HR-PEO Partnership Delivers Stronger Results 

“Companies tend to see the strongest results when they combine internal HR with a PEO in situations where they have some HR capability but lack depth across all functional areas,” Mincks says. “This hybrid approach allows internal HR to focus on strategic priorities such as culture, employee engagement and leadership development, while the PEO handles administrative execution and compliance.”

In practice, as the PEO handles administrative and compliance work, internal HR is expected to operate at a more strategic level, including: 

• Improving the employee experience
• Championing professional development 
• Strengthening manager effectiveness and accountability
• Building company culture, and
• Leading workforce planning and organizational design.

In a co-employment model, accountability is shared, and the exact split depends on the agreement in place. HR leaders still retain responsibility for key decisions and oversight, even when execution sits with the PEO.

Making the Partnership Work 

Mincks points to one thing that determines whether the partnership works: Defined roles matched to each side’s strengths.

• Defined role boundaries. Clarify ownership and avoid duplication (e.g., onboarding logistics handled by the PEO; hiring decisions led by HR).
  Tip: Document ownership at the task level, including who inputs, reviews and approves changes.
• Structured communication channels. Establish shared tools and regular check-ins between HR and the PEO account manager.
  Tip: Appoint one internal HR liaison as the primary point of contact for the PEO.
• Aligned performance metrics. Track outcomes across both sides, with HR focused on engagement and retention, and the PEO managing payroll processing and compliance responsibilities within the scope of the co-employment agreement.
  Tip: Determine upfront how success will be measured across both sides.

“The structure of the HR-PEO relationship typically establishes a natural division, with the company retaining control over its people, culture and day-to-day management, while the PEO assumes responsibility for administrative processes, compliance and employer-related liabilities,” Mincks said. “When this division is clearly understood and consistently followed, it minimizes overlap and prevents gaps.”

Where Collaboration Breaks Down 

Collaboration tends to break down when trust is lacking or when expectations aren’t aligned. 

“Internal HR teams may sometimes feel threatened by the presence of a PEO, leading to resistance or disengagement rather than collaboration,” Mincks said. “Disagreements can also arise around how to handle risk, compliance, or sensitive employee issues, particularly when the PEO takes a more conservative approach due to its shared liability.”

Plus, service-related issues, like slow response times or inconsistent support, can further undermine confidence in the partnership, he added.

In HR-PEO partnerships, a few problems repeatedly show up: 

• Misaligned communication on policy updates or benefits changes. Messages can fall out of sync when each side communicates separately.
  Tip: Review and release employee messaging jointly to avoid confusion.
• PEO processes are running faster than internal approval layers. Timelines sometimes conflict when the PEO moves ahead before HR approvals are complete.
  Tip: Align process timing and set clear turnaround expectations for both sides.
• Unclear accountability when an issue spans both teams. Without a defined owner, problems can linger or fall between responsibilities.
  Tip: Establish shared ownership for cross-functional issues, including who leads resolution and communication.

Getting ahead of these problems means agreeing on how the partnership runs before an issue forces the conversation.

Mistakes That Undermine HR-PEO Partnerships

Striking the right balance between in-house HR and PEO support is challenging. “A common mistake is failing to establish a true partnership mindset, where the relationship becomes transactional or adversarial instead of collaborative,” Mincks said. 

Common mistakes include: 

• Treating the PEO as a plug-and-play HR replacement
• Choosing a PEO provider based only on cost instead of cultural or functional fit, or
• Failing to plan how responsibilities will evolve as the company scales or changes workforce models.

The partnerships that hold up are the ones where HR brings the PEO in as part of the team from the start.

“Without trust, responsiveness and clear alignment, even the right model can underperform, leading to frustration and missed opportunities for improvement,” Mincks pointed out.