PEO Authority

ADP TotalSource

IRS CPEO CertifiedNational PEO
Roseland, NJ·Founded 1996·Serving 5-1000 employees
No reviews yet·
All 50
States Served
6
Services
4
Industries
5-1000
Serving

About ADP TotalSource

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+ countries. TotalSource is an IRS CPEO certified PEO named the #1 PEO by Forbes Advisor Small Business in August 2025. With the collective buying power of 722,000 worksite employees, TotalSource gives small and midsize businesses access to premium health plans from Aetna, United Healthcare, Kaiser, and other national carriers typically reserved for large corporations. The defining feature of ADP TotalSource is its HRBP model — every client receives a dedicated HR Business Partner whose guidance is backed by Employment Practices Liability Insurance (EPLI). TotalSource runs on ADP's Workforce Now platform, integrating payroll, benefits enrollment, time and attendance, recruiting, performance management, and compliance into one system. The platform supports all 50 states and serves businesses from 5 to 1,000+ employees, with an average client size of 50-75 employees. Unlike many PEOs, ADP TotalSource does not require long-term contracts.

IRS Certification

IRS Certified PEO (CPEO)
Certification active · Verified by PEO Authority
Certified ✓

The IRS Certified PEO (CPEO) designation is awarded by the Internal Revenue Service to PEO companies that meet rigorous standards for financial health, tax compliance, and operational integrity. ADP TotalSource holds CPEO status — a distinction held by fewer than 15% of PEOs in the United States.

Federal Tax Liability
As a CPEO, ADP TotalSource assumes sole liability for federal employment taxes on wages paid — protecting your business from tax exposure.
Annual Financial Audits
CPEOs undergo independent CPA audits annually and must maintain a surety bond, ensuring fiscal accountability and solvency.
IRS Reporting
ADP TotalSource files employment taxes under their own EIN as CPEO, simplifying your year-end tax obligations and eliminating duplicate filings.

Why businesses choose ADP TotalSource

✓Ranked #1 PEO by Forbes Advisor Small Business in August 2025
✓IRS CPEO certified — provides maximum federal tax protections for client businesses
✓722,000 worksite employee buying power — premium plans from Aetna, UHC, and Kaiser
✓Dedicated HRBP (HR Business Partner) whose guidance is backed by EPLI insurance
✓No long-term contract required — month-to-month flexibility available
✓Built on ADP Workforce Now — proven integrated platform for payroll, benefits, and HR
✓Named Best for Benefits Administration by business.com

Company Details

Headquarters
Roseland, NJ
Founded
1996
Serving
5-1000 employees
CPEO Certified
Yes - IRS Verified
Coverage
Nationwide
Company Type
National PEO

ADP TotalSource in Your State

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Pros & Cons

+
Pros
✓
Forbes #1 ranking
Named the top PEO for small businesses by Forbes Advisor in August 2025.
✓
HRBP model
Every client gets a named, dedicated HR Business Partner — not a call center.
✓
ADP infrastructure
75+ years of payroll and HR experience, serving 1.1M+ clients across 140 countries.
✓
No long-term contract
Unlike many PEOs, TotalSource offers month-to-month flexibility.
✓
Benefits buying power
722,000 worksite employees means premium carrier access at large-group rates.
−
Cons
−
No transparent pricing
Custom quotes only — no published rate sheet to compare against competitors.
−
Add-on costs
Recruiting, time-tracking, and some advanced HR tools cost extra on top of the base fee.
−
Enterprise feel
ADP's scale can mean a more corporate, less personalized experience for very small clients.
PEO Authority Editorial Note

ADP TotalSource is the safe, credible choice — backed by ADP's 75-year track record and the brand recognition that gives procurement teams confidence. The dedicated HRBP model and EPLI-backed HR guidance are genuine differentiators. The main limitations are price opacity and add-on costs for recruiting and time-tracking. Best for: small and midsize businesses (5-500 employees) that want the security of ADP's brand, a dedicated HR expert, and best-in-class benefits administration.

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