ADP TotalSource

ADP TotalSource is a full-service Professional Employer Organization (PEO) solution developed by ADP that enables businesses to manage their entire HR ecosystem through a single, integrated platform. As both an IRS-certified CPEO and ESAC-accredited PEO, it covers the complete employee lifecycle — from recruiting, hiring, and onboarding through payroll processing, benefits administration, performance management, and workforce analytics — all backed by dedicated HR business partners who provide legally grounded guidance and strategic support. The platform is particularly well-suited for small to mid-sized businesses ranging from 5 to over 1,000 employees across industries such as healthcare, construction, nonprofits, and technology, where HR teams are often lean and administrative demands can quickly become overwhelming. By co-employing workers under the PEO model, ADP TotalSource gives organizations access to large-group benefits packages they might not otherwise qualify for, while also taking on compliance responsibilities including tax filings, workers' compensation, and labor law adherence across all 50 states. Employees benefit from intuitive self-service tools and a mobile app that make it easy to access pay stubs, manage benefits elections, and complete onboarding tasks independently. For HR leaders, executives, and business owners who want to reduce administrative overhead, stay ahead of compliance risks, and redirect their focus toward culture, talent development, and growth, ADP TotalSource delivers an enterprise-grade HR infrastructure without requiring a large in-house HR department.