HR software vs PEO in 2026: which is right for your small business?
The fork in the road for small business HR. HR software is cheaper, lighter, and gives you more control. A PEO costs significantly more but offloads compliance and unlocks group benefits buying. Here is how to decide based on your specific situation.
You operate the tool
You remain the sole employer. The platform helps you run payroll, benefits, onboarding, and compliance.
- +$4-$15 per employee per month
- +Full control of carriers, plans, policies
- +No co-employment relationship
- −You manage compliance yourself
- −No group health buying leverage
PEO becomes a co-employer
PEO files payroll taxes under their FEIN, sources benefits from their group, takes shared HR compliance liability.
- +Group health pricing (often 10-20 percent savings)
- +Compliance offload across many states
- +HR consulting included
- −$50-$150 per employee per month
- −Limited customisation, exit takes 60-120 days
Annual cost comparison
| Team size | HR software (Gusto Plus) | PEO (Justworks Basic) | PEO premium | Inflection point |
|---|---|---|---|---|
| 10 emp | $2,400/yr | $7,080/yr | +$4,680 | PEO rarely justifies cost at this size unless multi-state. |
| 25 emp | $5,400/yr | $17,700/yr | +$12,300 | Group health savings can offset most of the gap. |
| 50 emp | $10,200/yr | $35,400/yr | +$25,200 | PEO compliance value scales here. Common decision point. |
| 100 emp | $19,800/yr | $70,800/yr | +$51,000 | Hire HR lead instead, or stay PEO if compliance is acute. |
PEO premium does not include the value of group health discounts (typically 10-20 percent on premiums). For a 25-person business with $200K annual premium, that's $20K-$40K of value the PEO unlocks.
5-question decision helper
Multi-state compliance burden grows fast. PEO co-employment offloads it cleanly.
An HR lead can manage compliance directly. PEO duplicates capacity.
PEO group buying typically saves 10-20% on health premiums - often more than the PEO premium.
PEO economics rarely work below 15 employees. HR software handles compliance adequately.
PEOs operate within their compliance framework. Full customisation requires self-managed tooling.
Major PEOs for small business
Justworks
Friendly UX, transparent published pricing, strong group health buying power, predictable per-employee pricing.
PEO-only (no non-PEO option), exit can be disruptive, limited customisation outside the Justworks framework.
TriNet
Industry-vertical PEO products (tech, life sciences, financial services), strong large-group health network, established compliance team.
Higher cost, sales-driven onboarding, dated UX in core admin.
Insperity
Comprehensive HR services including coaching and consulting, strong mid-market focus, robust risk management programs.
Most expensive of the established options, sales process takes weeks, premium pricing not always justified for tech-forward small businesses.
ADP TotalSource
ADP's underlying tax expertise and benefits broker network, scales smoothly to mid-market, deep workers' comp integration.
Quote-based pricing typical of ADP, dated UX, can feel impersonal compared to Justworks or TriNet.
When the right answer is “both”
Some businesses use a PEO for payroll, benefits, and compliance offload while adding a lightweight HR platform like BambooHR Core for performance reviews and people-experience features. This costs more than either alone (roughly $80-$130 PEPM combined) but addresses two real gaps: PEOs are weak on people-experience, and HR software alone is weak on group benefits.
The hybrid is most common at 50-150 employees with strong people-ops aspirations. Below 50, the cost is rarely justified. Above 150, you're typically choosing between PEO + dedicated HR lead, or full HR software + dedicated HR team.