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Independent review · Updated 2026

Group Management Services (GMS) Review, an independent broker's honest assessment.

Group Management Services is the Midwest's blue-collar CPEO: founder-owned, IRS certified since January 2018, more than 50,000 worksite employees, about 25 local offices, and a workers' compensation and safety practice that includes self-insured status in Ohio since 2014. The two things to verify are financial assurance, because GMS is not ESAC accredited, and medical pricing, because a 50,000-employee base does not buy health rates the way a national top-10 PEO can.

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✓CPEO certified✓Not ESAC accredited✓Verified 2026
1996
founded
Yes
CPEO certified
5+
min sweet-spot size
PEPM package tiers plus quoted benefits and workers' comp
pricing model

Quick verdict: the TL;DR.

Our score
4.0/5
CPEO certification, a branch-office service model and unusual workers' comp depth make it strong for trades and industrial payrolls; held back by the absence of ESAC accreditation and thinner master medical leverage than national peers.
Best for
Small and mid-size blue-collar employers of 10 to 100 employees in Ohio, the Midwest and the Southeast where workers' compensation drives the economics.
Worst for
Venture-backed tech companies wanting a software-first platform, employers needing international payroll, and buyers who require ESAC accreditation alongside IRS certification.
Sweet spot
5 to 250 employees (sweet spot: 10 to 100)
Pricing
Quoted per client; not published

We've placed clients with Group Management Services (GMS) across multiple industries and headcounts. The assessment below reflects what actually happens in real engagements, not what the Group Management Services (GMS) sales deck says happens, not what the affiliate review sites report based on commission spreads, and not what aggregated G2 stars suggest.

Company background: Group Management Services (GMS).

Group Management Services, GMS, was founded in 1996 and is headquartered in Richfield, Ohio. It is privately held and founder-owned, and has grown both organically and through several PEO acquisitions since 2018 to roughly 25 U.S. offices with local service teams. By its own May 2025 statement it serves more than 50,000 worksite employees, which puts it well above most regional PEOs and well below the national top tier.

GMS is listed on the IRS Certified PEO register as Group Management Services Inc, effective January 1, 2018. CPEO certification moves sole liability for federal employment taxes to the PEO and lets a client's wage base carry over on a mid-year start, which is a real dollar question for a mid-year switch. GMS is not ESAC accredited, so there is no bonded third-party financial assurance behind client funds; the two credentials answer different questions and GMS holds one of them.

The company's identity is workers' compensation. It has been self-insured for workers' compensation in Ohio since 2014 and runs a deep safety practice, which is why construction, manufacturing, transportation, staffing, home health and janitorial payrolls that many PEOs quote reluctantly are its core. In 2025 it moved all clients onto GMS Connect, a cloud-based platform, which is a recent technology refresh for a firm that has not sold on software.

Founded
1996
Ownership
Private (independent, founder-owned)
Worksite employees
More than 50,000 (company statement, May 2025)
CPEO
Yes, IRS certified
ESAC
No
Sweet spot
5 to 250 employees (sweet spot: 10 to 100)

Pricing: what to expect.

GMS prices its administration in PEPM package tiers, with benefits and workers' compensation quoted per client on top. Its package pricing page lists tiers and add-ons but sends buyers to a quote form, so no rate is published. Ask which tier your headcount lands in, what each add-on covers, and for the benefits and workers' comp lines separately so the three layers of the invoice can be compared on their own.

The workers' compensation line is where GMS tends to win. Self-insured status in Ohio since 2014 and a dedicated safety bench mean a trades or industrial employer is priced by people who understand the class codes rather than declined or loaded. Ask for class-by-class rates and your experience modification as GMS would carry it, and compare that line against at least one regional peer with its own workers' comp strength.

Medical is where we press. A worksite employee base around 50,000 gives GMS less master medical leverage than a national top-10 PEO, and medical is the largest line on the invoice. Compare the plan-by-plan rate table at your census against a national PEO's master plan before deciding; a workers' comp advantage can be given back on the health renewal. Contracts are annual in the normal course; confirm notice and exit terms in the client service agreement.

Strengths: what Group Management Services (GMS) does well.

Workers' compensation and safety as the core practice

Self-insured in Ohio since 2014, with a safety practice that works the loss side rather than just the premium side. For a roofing contractor, a trucking company or a staffing firm, this is the line that decides the comparison, and GMS prices it with real credibility.

IRS CPEO certification since 2018

Federal employment tax liability transfers to the PEO and the wage base carries over on a mid-year transfer. For a blue-collar employer with high turnover, the wage-base point alone can be material, and it covers the question most finance teams ask first.

About 25 local offices, not a call center

GMS has grown a branch-office model across the Midwest and Southeast, organically and through acquisitions since 2018. An owner in Columbus, Nashville or Charlotte gets a nearby team rather than a national queue, which is what trades businesses tend to want.

A recent platform refresh

Moving every client onto the cloud-based GMS Connect in 2025 is a meaningful modernization for a PEO that has sold on service and workers' comp rather than software. It will not compete with a tech-first platform, but it closes a gap that used to be a reason to look elsewhere.

Considerations: the things to weigh.

We frame these as considerations rather than negatives because most are real trade-offs rather than disqualifying flaws, but they are things we make sure clients understand before signing.

Not ESAC accredited

CPEO certification covers federal tax liability; ESAC accreditation would add independently verified financial standards and a surety bond behind client funds, and GMS does not carry it. For most owner-led employers that is acceptable, but a buyer whose lender or auditor wants bonded financial assurance should ask GMS for financial statements and compare a peer that holds both.

Medical leverage below the national top tier

Fifty thousand worksite employees is real scale and still not national-PEO scale on the health side. Put GMS's medical rate table beside a national master plan at your census; the comparison usually confirms whether the workers' comp advantage holds up once medical is counted.

Footprint is Midwest and Southeast

Roughly 25 offices concentrated in two regions is strong where it is and not truly national. An employer with meaningful headcount in the West or Northeast should ask how those employees are serviced.

No published rates

The package pricing page describes tiers and add-ons without numbers. That is normal in this industry, but it means cost is verified in diligence, not on the website.

The fit: who should and shouldn't pick Group Management Services (GMS).

Good fit for Group Management Services (GMS)

  • +Blue-collar employers of 10 to 100 employees: construction, manufacturing, transportation, staffing, home health, landscaping and janitorial
  • +Ohio, Midwest and Southeast businesses that want a nearby branch office
  • +Companies with heavy workers' compensation exposure or a difficult experience modification
  • +Employers who require IRS CPEO certification but can accept the absence of ESAC

Bad fit for Group Management Services (GMS)

  • −Venture-backed tech companies that want a software-first platform
  • −Employers needing international or global payroll
  • −Buyers who require ESAC accreditation alongside IRS certification
  • −Companies whose medical renewal needs a national top-10 master plan's leverage, unless the workers' comp saving clearly outweighs it

Common alternatives: PEOs to compare against Group Management Services (GMS).

When a client is evaluating Group Management Services (GMS), these are the three alternatives we most often put on the shortlist. The rationale below explains when each one beats Group Management Services (GMS) and when it doesn't. For the full comparison on cost, benefits and service, read Group Management Services (GMS) alternatives compared.

FrankCrum

Family-owned Florida PEO with its own workers' compensation carrier
Sweet spot
10 to 500+ employees (sweet spot: 10 to 150)
Pricing
Bundled administrative fee quoted per client, driven by payroll size, headcount and workers' comp risk class
Typical cost
Quoted per client; not published

A family-owned Florida PEO of comparable scale that underwrites workers' compensation through its own affiliated carrier; the natural head-to-head on the workers' comp line for a construction or trades employer in the Southeast.

Read full review →

Questco

Texas-based mid-market PEO peer to G&A
CPEO
Sweet spot
10 to 250 employees
Pricing
Quote-only PEPM
Typical cost
Quote-only

A Texas mid-market CPEO with a personalized service model and construction and manufacturing in its industry list, for a Sun Belt employer comparing certified regional options.

Read full review →

The Employer Group

Wisconsin small-business PEO, wholly owned by M3 Insurance since 2023
Sweet spot
Small businesses, roughly 5 to 100 employees (sweet spot: 10 to 50)
Pricing
Quote-only; pricing not published
Typical cost
Quoted per client; not published

A small Wisconsin PEO with an insurance brokerage parent and unbundled service options, for a Madison-area employer that wants a very local team and does not need certification.

Read full review →

Want help comparing Group Management Services (GMS) against the 2-3 other PEOs that fit your business?

A 15-minute call, then we shortlist the alternatives, gather quotes, and sit in the negotiation calls. Free to you, our fee is paid by the PEO you ultimately pick, at the same rate regardless of which one.

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Frequently asked questions Group Management Services (GMS).

Is Group Management Services a certified PEO?

Yes. GMS is on the IRS Certified PEO register as Group Management Services Inc, effective January 1, 2018. It is not ESAC accredited.

What size company is GMS best for?

GMS positions for 5 to 250 employees, and the model fits best between 10 and 100, especially for blue-collar payrolls.

Where does GMS operate?

It is headquartered in Richfield, Ohio, with roughly 25 offices concentrated in the Midwest and Southeast, grown organically and through acquisitions since 2018.

Does GMS publish pricing?

No. Its package pricing page lists PEPM tiers and add-ons but sends buyers to a quote form; benefits and workers' compensation are quoted per client.

What is the main consideration with GMS?

No ESAC accreditation, so financial assurance has to be verified directly, and a worksite employee base around 50,000 that gives less master medical leverage than a national top-10 PEO.

How does GMS compare to FrankCrum?

Both are workers' comp focused PEOs built for trades and blue-collar payrolls. GMS is IRS certified, self-insured for workers' comp in Ohio and strongest in the Midwest; FrankCrum is neither CPEO nor ESAC but underwrites workers' comp through its own affiliated carrier and is weighted to Florida and the Southeast. Compare the workers' comp line and the medical rate table on both.

Is GMS good for workers' compensation?

It is the company's core strength: self-insured in Ohio since 2014 with a deep safety practice, and it quotes construction, trucking, staffing and manufacturing payrolls that many PEOs decline.

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