Compare how each approach handles payroll, benefits and HR support, what your business retains, and what to consider as your workforce grows.
Free advice. No obligation to change your current setup.
A professional employer organization (PEO) provides agreed HR-related services through a co-employment arrangement. The provider and employer share certain responsibilities defined by their agreement; the employer continues to direct its workforce and operate its business.
An administrative services organization (ASO) provides agreed administrative or HR support without the PEO co-employment arrangement. Employers generally retain their own employment arrangement while selecting services that may include HR guidance, systems, or administration.
Payroll services can focus on processing pay and related administration, with HR managed by your own team or separately sourced specialists. Scope varies. In all three approaches, provider services, benefits and workers’ compensation arrangements, and retained responsibilities depend on the provider and contract.
See how PEO services workUse these distinctions to frame questions, then confirm the exact services, responsibilities, and terms in each provider’s proposal.
| Consideration | PEO | ASO | Payroll + internal or separate HR |
|---|---|---|---|
| Employment arrangement | Co-employment: the PEO and employer share agreed employment responsibilities. Your business still directs its people and operations. | Administrative support without a PEO co-employment arrangement. Your business remains the employer and contracts for selected services. | A payroll service relationship, not co-employment. Your business employs the team and coordinates internal or separately sourced HR support. |
| Payroll administration | Payroll processing and related tax administration are commonly included. Confirm filing responsibilities, corrections and required employer information. | Payroll processing and tax administration may be included. Confirm the scope, filing arrangements and who resolves issues. | Processing and agreed tax services are the main focus. Your team still supplies accurate inputs and verifies responsibilities. |
| Benefits sourcing and administration | May offer access to provider-sponsored plans and enrollment administration. Eligibility, networks, contributions and permitted existing plans vary. | Benefits are generally sourced separately by the employer or its broker. The ASO may support enrollment and administration. | Your team or benefits partner usually sources plans. Payroll may handle deductions or integrations; additional administration depends on the service. |
| HR support | May combine HR guidance, onboarding, records and technology. Review support depth, response expectations and how it works with your internal team. | May provide HR administration, tools and guidance alongside your team. Specialist or hands-on services depend on the agreement. | Internal HR or other specialists lead broader HR work. Some payroll providers offer additional tools or advice; do not assume they are included. |
| Workers’ compensation arrangements | Some arrangements include coverage and claims or safety support. Review policy terms, classifications, exclusions and employer duties. | The employer generally arranges coverage separately. An ASO may assist with administration, reporting or coordination if contracted. | Coverage is generally arranged separately. Confirm payroll reporting, deductions and any insurance integrations with your carrier or broker. |
| Employer responsibilities | Your business retains daily supervision, hiring and workplace decisions, safety practices and accurate information. Not every duty or liability transfers. | Your business retains employer responsibilities while delegating agreed tasks. Administrative support does not remove your legal obligations. | Your business retains employer duties and coordinates payroll, HR, benefits and safety. Outsourcing processing does not transfer every responsibility. |
| Pricing and coordination considerations | Compare the full package: fees, benefits, coverage, services and exit terms. A coordinated model does not guarantee lower total costs. | Compare administration fees plus separate benefits, coverage and specialist costs. Clarify handoffs between providers and your team. | Compare payroll fees, add-ons, internal HR time and specialist costs. Separate providers can offer choice but require coordination. |
Co-employment: the PEO and employer share agreed employment responsibilities. Your business still directs its people and operations.
Administrative support without a PEO co-employment arrangement. Your business remains the employer and contracts for selected services.
A payroll service relationship, not co-employment. Your business employs the team and coordinates internal or separately sourced HR support.
Payroll processing and related tax administration are commonly included. Confirm filing responsibilities, corrections and required employer information.
Payroll processing and tax administration may be included. Confirm the scope, filing arrangements and who resolves issues.
Processing and agreed tax services are the main focus. Your team still supplies accurate inputs and verifies responsibilities.
May offer access to provider-sponsored plans and enrollment administration. Eligibility, networks, contributions and permitted existing plans vary.
Benefits are generally sourced separately by the employer or its broker. The ASO may support enrollment and administration.
Your team or benefits partner usually sources plans. Payroll may handle deductions or integrations; additional administration depends on the service.
May combine HR guidance, onboarding, records and technology. Review support depth, response expectations and how it works with your internal team.
May provide HR administration, tools and guidance alongside your team. Specialist or hands-on services depend on the agreement.
Internal HR or other specialists lead broader HR work. Some payroll providers offer additional tools or advice; do not assume they are included.
Some arrangements include coverage and claims or safety support. Review policy terms, classifications, exclusions and employer duties.
The employer generally arranges coverage separately. An ASO may assist with administration, reporting or coordination if contracted.
Coverage is generally arranged separately. Confirm payroll reporting, deductions and any insurance integrations with your carrier or broker.
Your business retains daily supervision, hiring and workplace decisions, safety practices and accurate information. Not every duty or liability transfers.
Your business retains employer responsibilities while delegating agreed tasks. Administrative support does not remove your legal obligations.
Your business retains employer duties and coordinates payroll, HR, benefits and safety. Outsourcing processing does not transfer every responsibility.
Compare the full package: fees, benefits, coverage, services and exit terms. A coordinated model does not guarantee lower total costs.
Compare administration fees plus separate benefits, coverage and specialist costs. Clarify handoffs between providers and your team.
Compare payroll fees, add-ons, internal HR time and specialist costs. Separate providers can offer choice but require coordination.
“Typical” describes common service structures only. Eligibility, coverage, pricing, and contractual duties vary; review the actual agreement and applicable policies.
Review the underlying duties: payroll tax responsibility and retained employer responsibilities.
These situations can help identify what to review—not prescribe a model. The right questions depend on your workforce, existing arrangements, priorities, and the support available under each agreement.
Review whether a PEO’s agreed payroll, benefits administration, HR, and workers’ compensation services fit the way your operation works. Clarify responsibilities, employee experience, service access, and total cost before comparing proposals.
Explore whether an ASO or another HR support arrangement can complement your existing benefits, insurance, and payroll relationships. Ask what coordination the provider actually supplies and which tasks remain with your team.
Identify the specific capacity gap—such as payroll processing, tax administration, systems, or occasional HR expertise. Compare standalone services with broader arrangements without assuming you need to outsource your whole function.
You do not need to decide which model you want before talking with us.
Talk Through Your HR OptionsReview the practical questions behind growth, outsourcing and the balance between internal support and external providers.
Actual services and employer obligations depend on the provider, policies, locations, and signed agreements. These answers are a starting point for a careful review.
Tell us what is working, what is taking too much time and what is changing in your business. PEO Benefit Partners can help you consider the options without pressure to change your current arrangement.
