It's fairly simple math! Growing businesses pay more for employee benefits because insurance carriers price risk based on group size. A larger pool of employees means more predictable claims data, which means lower per-employee premiums. A company with fewer employees is a high-uncertainty pool. Carriers price that uncertainty into the rate.
The result is a structural disadvantage that can feel unjust and has nothing to do with how well a business is run. A 25-person company shopping for health insurance is competing in the small-group market—a market with higher base rates, fewer plan options, and less negotiating leverage than the large-group market where bigger employers operate.
This is the benefits gap many business owners feel most at renewal: premiums keep rising, plan quality stays flat or gets worse, and the options available to employees are clearly weaker than what larger employers can offer. For leaders who care deeply about serving their people well, that can feel like a no-win situation. And that gap affects hiring and retention, especially when candidates are comparing offers that simply are not on the same level.
Large-group health insurance rates are premiums negotiated at scale—typically for employer groups of 50 or more, though the threshold varies by carrier and state. At large-group scale, carriers offer lower per-employee costs, more plan variety, and more stable year-over-year pricing because the risk pool is larger and more predictable.
For a business owner, the plan you can offer employees through the small-group market is almost certainly more expensive and less comprehensive than what a larger employer can offer for the same budget. That gap affects what candidates see when they compare offers, what employees experience when they use their benefits, and what renewal looks like every year.
A PEO enters a co-employment relationship with your business, which means your employees join the PEO's employer group for benefits purposes. That group includes employees from every client company the PEO serves, often thousands of employees across hundreds of organizations.
Scale is what changes the game. When your 30 employees are part of a pool of 10,000, your benefits are priced at large-group rates. The carrier sees a large, stable pool. You and your employees see plans that were not available to you independently.
In practice, this typically means:
The benefits your employees can access through a PEO are a direct consequence of purchasing power your business does not have on its own.
Benefits are one of the most visible signals an organization sends about how it values its people. When benefits are strong, employees notice—at enrollment, when they use their coverage, and when they compare their situation to friends at other companies. When benefits are weak, they notice that too.
For organizations competing for mission-aligned talent, benefits are often the place where the gap between "we want to take care of our people" and "here is what we can actually offer" is most visible. A candidate weighing an offer from a growing nonprofit or a 40-person company against one from a larger employer is making a real tradeoff if the benefits are significantly different.
Better benefits through a PEO affects retention, morale, and the daily sense among employees that the organization has made a real investment in them. Because benefits are part of total compensation—and weak benefits are a recurring source of quiet dissatisfaction that shows up in turnover before it shows up in exit interviews—they also affect leadership's ability to have honest conversations about compensation.
Most business owners have a sense that their benefits are not what they could be. The clearer question is whether that gap is costing you in ways you can measure.
Questions worth asking before your next renewal:
If several of those answers are uncomfortable, the benefits gap is affecting you. Renewal is the highest-leverage moment to address it; we all know how costly and disruptive changing your benefits structure mid-year can be. A well-timed evaluation at renewal could be a blessing for you and your people.
IronRoad's group purchasing power gives organizations access to benefits that genuinely compete—without requiring the headcount of a large employer. If that sounds beneficial to you, reach out.
Can a growing business really access large-group health insurance rates?
Yes, through a PEO. Because a PEO co-employs your workforce alongside employees from all its client companies, your employees are covered under a large-group plan. The carrier prices the pool, not your individual company—so your 25 employees benefit from rates negotiated across thousands.
Does joining a PEO mean losing control over which benefits you offer?
Most PEOs offer a range of plan options within their group. You typically choose which plans to make available to your employees from that menu. The PEO manages the carrier relationship and administration; you retain the decision-making about what you offer.
How much can a growing business save on benefits through a PEO? Savings vary based on your current plan, your employee demographics, and the PEO's carrier relationships. The more meaningful comparison is often not just cost but coverage quality—lower premiums for equivalent or better plans is the more common outcome than lower premiums alone.
What happens to employee benefits if we leave the PEO?
When a business exits a PEO relationship, employees typically need to re-enroll in new plans. This is a legitimate transition consideration and worth discussing with any PEO before you sign. A structured offboarding process minimizes disruption.
Are PEO benefits available to part-time employees?
Eligibility rules depend on the PEO and the specific plans. Most PEOs follow the same ACA eligibility thresholds that apply to standard employer-sponsored coverage. Ask about part-time eligibility directly if it is relevant to your workforce.