ADP is the global leader in payroll and HR services, serving small businesses through Fortune 500 enterprises with payroll processing, tax filing, benefits administration, time and attendance, and full-service HCM platforms. Marketed as payroll and HR software for businesses of every size, ADP combines automated payroll across the United States and 140-plus countries, federal and state tax filing, employee self-service, benefits and 401k administration, talent management, workforce analytics, time and labor tracking, and integrations with QuickBooks, Xero, NetSuite, and major HRIS, ERP, and accounting platforms. ADP is a strong fit for small businesses outsourcing payroll, mid-market employers running multi-state operations, and global enterprises consolidating payroll across multiple countries.