Best PEO Companies in New Hampshire
Compare Professional Employer Organizations serving New Hampshire businesses. Editorial ratings are independent — featured placements are paid visibility, not endorsements.
PEO Companies Serving New Hampshire
Justworks
New York, NY · Est. 2012
Insperity
Kingwood, TX · Est. 1986
TriNet
Dublin, CA · Est. 1988
ADP TotalSource
IRS CPEO ✓NationwideHQ: Roseland, NJ · Est. 1996
ADP TotalSource is the Professional Employer Organization division of ADP (NASDAQ: ADP), one of the world's largest payroll and HR companies with over 75 years of history and more than 1.1 million clients across 140+ cou…
CoAdvantage
IRS CPEO ✓NationwideHQ: Tampa, FL · Est. 1996
CoAdvantage is a Bradenton, Florida-based Professional Employer Organization founded in 1997.
Infiniti HR
NationwideHQ: Rockville, MD · Est. 2008
Infiniti HR is a Burtonsville, Maryland-based IRS CPEO certified Professional Employer Organization founded in 2004.
FrankCrum
NationwideHQ: Clearwater, FL · Est. 1981
A family-owned PEO based in Florida serving businesses nationwide with 2-500 employees. FrankCrum is one of the few PEOs with its own insurance company, enabling highly competitive workers comp rates.
AdvantEdge HR
RegionalHQ: Albany, NY · Est. 2002
A New York state-based PEO with particular expertise in navigating the state's complex employment regulations. Strong nonprofit sector experience.
PrestigePEO
IRS CPEO ✓NationwideHQ: Melville, NY · Est. 1998
PrestigePEO is a national Professional Employer Organization headquartered in Melville, New York, serving small and mid-sized businesses across all 50 states since 1998.
New England HR
IRS CPEO ✓RegionalHQ: Boston, MA · Est. 1998
A Boston-based PEO with deep expertise in Massachusetts and New England employment law. Known for strong healthcare benefit networks and technology sector support.
Aspen HR
IRS CPEO ✓RegionalHQ: Boston, MA · Est. 2015
Aspen HR is a Walnut Creek, California-based IRS CPEO certified Professional Employer Organization founded in 2017.
Genesis HR Solutions
IRS CPEO ✓RegionalHQ: Burlington, MA · Est. 1993
Genesis HR Solutions is a Burlington, Massachusetts-based IRS CPEO certified and ESAC accredited Professional Employer Organization founded in 1991.
IntelliPro
IRS CPEO ✓NationwideHQ: San Jose, CA · Est. 2009
IntelliPro is an IRS-certified PEO headquartered in San Jose, California, specializing in HR outsourcing, payroll administration, and employee benefits management for technology companies and professional services firms…
Paychex PEO
IRS CPEO ✓NationwideHQ: Rochester, NY · Est. 1971
Paychex PEO is the co-employment division of Paychex (NASDAQ: PAYX), one of the largest HR and payroll companies in the United States with over 50 years of experience serving American businesses.
BBSI
NationwideHQ: Vancouver, WA · Est. 1965
Barrett Business Services, Inc. (BBSI) is a publicly traded (NASDAQ: BBSI) Professional Employer Organization headquartered in Vancouver, Washington.
Adams Keegan
IRS CPEO ✓NationwideHQ: Memphis, TN · Est. 1987
Adams Keegan is a Memphis, Tennessee-based PEO offering both co-employment (PEO) and administrative services organization (ASO) models.
Deel PEO
NationwideHQ: San Francisco, CA · Est. 2019
Deel PEO is the domestic U.S. co-employment offering from Deel, a San Francisco-based global HR and payroll platform founded in 2019 and valued at $16.8 billion following a $450 million Series G in May 2025.
AlphaStaff
NationwideHQ: Sunrise, FL · Est. 1997
AlphaStaff is a Sunrise, Florida-based Professional Employer Organization founded in 1997 and ESAC accredited.
Vensure Employer Services
NationwideHQ: Chandler, AZ · Est. 2004
Vensure Employer Services is one of the largest privately held PEOs in the United States, headquartered in Chandler, Arizona, and founded in 2004.
America's Back Office
IRS CPEO ✓NationwideHQ: Chandler, AZ · Est. 2000
America's Back Office is an IRS CPEO certified and ESAC accredited PEO headquartered in Chandler, Arizona, providing comprehensive HR outsourcing services to small and mid-sized businesses across the United States.
Avitus Group
NationwideHQ: Billings, MT · Est. 1994
Avitus Group is a Billings, Montana-based PEO and HR outsourcing company founded in 1994, providing payroll processing, employee benefits, workers' compensation, and HR services to businesses nationwide.
Modern Business Associates
NationwideHQ: Tampa, FL · Est. 1990
Modern Business Associates (MBA) is a Tampa, Florida-based PEO founded in 1990, providing co-employment services including payroll processing, employee benefits, HR administration, workers' compensation, and compliance s…
Proservice National
NationwideHQ: Honolulu, HI · Est. 2010
Proservice National is the mainland U.S. PEO extension of ProService Hawaii, providing co-employment services including payroll, benefits, HR administration, and compliance support to businesses across the continental Un…
Questco
NationwideHQ: The Woodlands, TX · Est. 2002
Questco is a national PEO headquartered in The Woodlands, Texas, providing comprehensive co-employment services to businesses across the United States.
Regis HR Group
NationwideHQ: Tampa, FL · Est. 2002
Regis HR Group is a Tampa, Florida-based national PEO providing co-employment services including payroll processing, employee benefits, HR administration, workers' compensation, and compliance support to businesses acros…
Stratus HR
NationwideHQ: South Jordan, UT · Est. 2003
Stratus HR is a South Jordan, Utah-based PEO (operating as ISI HR) providing comprehensive co-employment services to small and mid-sized businesses nationwide.
INVO PEO
NationwideHQ: Tampa, FL · Est. 2010
INVO PEO is a Tampa, Florida-based Professional Employer Organization providing co-employment services including payroll processing, employee benefits, HR administration, workers' compensation, and compliance support to…
SinglePoint Outsourcing
NationwideHQ: Scottsdale, AZ · Est. 2007
SinglePoint Outsourcing is a Scottsdale, Arizona-based PEO providing national co-employment services including payroll, employee benefits, HR administration, and compliance support to small and mid-sized businesses acros…
NetPEO
NationwideHQ: Atlanta, GA · Est. 2009
NetPEO is an Atlanta, Georgia-based PEO broker and provider offering co-employment services and PEO matching to businesses nationwide.
PrimePay
NationwideHQ: West Chester, PA · Est. 1986
PrimePay is a West Chester, Pennsylvania-based payroll and PEO services company founded in 1986, providing co-employment services and payroll administration to small and mid-sized businesses nationwide.
Genesis HR
IRS CPEO ✓NationwideHQ: Burlington, MA · Est. 1991
Genesis HR Solutions is a Burlington, Massachusetts-based IRS CPEO certified PEO founded in 1991, providing co-employment services to businesses across New England and nationally.
Prism HR
NationwideHQ: Hopkinton, MA · Est. 1996
PrismHR is a Hopkinton, Massachusetts-based HR technology platform and PEO services provider founded in 1996.
Choosing a PEO in New Hampshire
Professional Employer Organizations in New Hampshire can help businesses of all sizes manage payroll, benefits, HR compliance, and workers compensation under a co-employment arrangement. With 22+ providers operating in the state, business owners have a wide range of options — from boutique regional firms with deep local expertise to national providers with broad benefit pools.
When evaluating PEOs in New Hampshire, consider whether the provider is IRS-Certified (CPEO), which offers specific tax advantages and indicates a higher compliance standard. Also review the provider's experience with your specific industry, their client size range, and whether they have dedicated HR professionals assigned to your account.
Use the form on this page to receive no-obligation proposals from PEOs that serve New Hampshire businesses matching your size and industry profile.
Already working with a PEO and considering a switch? PEO Alternatives has independent comparisons of the top providers to help you evaluate your options.
Frequently Asked Questions
How many PEOs operate in New Hampshire?
There are 22+ Professional Employer Organizations serving businesses in New Hampshire. The number includes both local/regional PEOs and national providers with operations in the state.
Does New Hampshire require PEOs to be licensed?
PEO licensing requirements vary by state. Some states require PEOs to register or obtain a license before operating. We recommend verifying your chosen PEO's compliance status directly or contacting your state's labor department.
What is the average cost of a PEO in New Hampshire?
PEO pricing typically ranges from 2–12% of total payroll, or $100–$200 per employee per month. Costs vary based on company size, services needed, and the specific PEO. Larger companies generally receive better rates.
Should I use a local New Hampshire PEO or a national provider?
National PEOs offer broader benefit pools and more resources, while local PEOs may have deeper knowledge of New Hampshire labor laws and regulations. The best choice depends on your company's size, growth plans, and specific needs.