ADP TotalSource pricing overview: what the world's largest PEO charges
ADP TotalSource pricing is customized based on four primary factors: employee count, industry risk classification, benefits selections, and employee demographics (age, location, family status). The PEO administrative fee — which covers payroll processing, HR technology, compliance management, workers' comp administration, and HR advisory services — is separate from benefits premiums, which are passed through at cost based on carrier rates negotiated by ADP's 722,000-employee pool.
PEO Clarify's 2026 estimates put the ADP TotalSource admin fee at $160 to $210 PEPM for 10 to 25 employees, $140 to $185 for 26 to 50, $110 to $160 for 51 to 100, $90 to $135 for 101 to 250, and $70 to $120 above 250. Adding benefits premiums and workers' comp brings all-in costs to about $1,250 to $1,550 PEPM for the smallest companies and $850 to $1,150 for the largest. For a 200-employee company, that is roughly $216,000 to $324,000 a year in admin fees and $2.3 million to $3.0 million all-in.
The administrative fee, about $70 to $210 PEPM depending on size, covers the PEO services themselves. The much larger remainder of the all-in cost is benefits premiums and workers' comp that would exist regardless of the PEO relationship. The value question is whether the ADP administrative fee is justified by the benefits savings, compliance protection, and technology that ADP TotalSource provides compared to managing these functions independently or through a cheaper PEO. PEO Clarify reports that buyers who run a competitive process typically get 8 to 15 percent off the initial admin fee proposal.
ADP's 722,000+ worksite employee base gives it unmatched benefits purchasing power. ADP's own materials and multiple G2 reviews indicate that clients access medical plans at rates 10–20% below what small businesses secure through traditional brokers. For a 100-employee company spending $500 per employee per month on medical premiums, a 15% savings translates to $7,500 monthly or $90,000 annually — which can offset a significant portion of the PEO administrative fee.
ADP TotalSource plans and prices, verified Sep 2026| Plan | Price | Billing unit | What's included |
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| TotalSource PEO, 10-25 employees | ~$160-$210 per employee/mo admin fee (estimated)Estimated, quote-based | per employee per month | Co-employment, payroll and tax filing, ADP benefits pool access, workers' comp administration and HR support. |
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| TotalSource PEO, 26-50 employees | ~$140-$185 per employee/mo admin fee (estimated)Estimated, quote-based | per employee per month | Same PEO services; per-employee admin fee falls as headcount grows. |
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| TotalSource PEO, 51-100 employees | ~$110-$160 per employee/mo admin fee (estimated)Estimated, quote-based | per employee per month | Same PEO services at a lower per-employee rate. |
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| TotalSource PEO, 101-250 employees | ~$90-$135 per employee/mo admin fee (estimated)Estimated, quote-based | per employee per month | Same PEO services at a lower per-employee rate. |
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| TotalSource PEO, 250+ employees | ~$70-$120 per employee/mo admin fee (estimated)Estimated, quote-based | per employee per month | Same PEO services; largest clients negotiate the lowest rates. |
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Rows marked “estimated, quote-based” are not published by ADP TotalSource. They are ranges from the third-party sources linked below; your quote will depend on headcount, modules and contract length.
What ADP TotalSource costs for 10, 50 and 200 employees
ADP TotalSource estimated monthly cost by company size| Plan | 10 employees | 50 employees | 200 employees |
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| Admin fee onlyEstimated, quote-based | $1,600-$2,100 | $7,000-$9,250 | $18,000-$27,000 |
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| All-in (admin + benefits + workers' comp)Estimated, quote-based | $12,500-$15,500 | $57,500-$72,500 | $190,000-$250,000 |
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Monthly cost from PEO Clarify's April 2026 per-employee bands (10-25, 26-50 and 101-250 employees) multiplied by headcount; all-in includes typical health premiums and workers' comp.
Prices verified Sep 2026. Sources: PEO Clarify ADP TotalSource review (updated Apr 2026), PEO Clarify: PEO pricing explained (Apr 2026), PEO Clarify: TriNet vs Insperity vs ADP TotalSource (Apr 2026).