SAP HCM (Human Capital Management) is made up of several core sub-modules that cover the full employee lifecycle—from hire to retire. Here’s a clean, practical breakdown of the main SAP HCM sub-modules and what each one does:


Personnel Administration (PA):

The backbone of SAP HCM.

  • Employee master data (personal details, job, org assignment)
  • Personnel actions (hire, transfer, promotion, termination)
  • Infotypes (e.g., address, bank details, contracts)

Organizational Management (OM):

Defines who does what in the organization.

  • Organizational units, jobs, positions
  • Reporting relationships
  • Org charts and hierarchies
  • Integration with PA and other modules

Time Management (TM):

Tracks when employees work (or don’t).

  • Work schedules and shifts
  • Attendance and absences
  • Leave management
  • Overtime and time evaluation

Payroll:

Handles employee compensation—accurately and compliantly.

  • Salary and wage calculation
  • Taxes and statutory deductions
  • Payroll posting to Finance (FI)
  • Country-specific payroll schemas

Personnel Development (PD):

Focuses on employee growth and skills.

  • Qualifications and competencies
  • Career planning and succession
  • Training needs analysis

Training & Event Management (TEM):

Manages learning and training activities.

  • Courses and training sessions
  • Trainers, resources, and costs
  • Employee enrollment and attendance

Performance Management:

Tracks and evaluates employee performance.

  • Appraisals and goal setting
  • Reviews and ratings
  • Integration with PD and compensation

Compensation Management:

Supports structured pay decisions.

  • Salary planning and increases
  • Bonuses and incentives
  • Budget control

ESS / MSS (Employee & Manager Self-Services):

Web-based self-service features.

  • Leave requests, payslips, personal data updates (ESS)
  • Approvals, team data, reports (MSS)
  • Often built using SAP Portal or Fiori

Recruitment / Talent Acquisition:

Manages hiring processes.

  • Job requisitions and vacancies
  • Applicant tracking
  • Interview and selection process
  • (Often replaced today by SAP SuccessFactors Recruiting)

Modern Note:

In newer landscapes:

  • SAP HCM is often called SAP ECC HCM
  • Many customers are moving to SAP SuccessFactors for Talent Management and Core HR
  • SAP S/4HANA HCM focuses mainly on Payroll and Time Management

Summary:

SAP HCM (Human Capital Management) is a comprehensive suite for managing the entire employee lifecycle. Its main sub-modules include Personnel Administration (PA) for employee master data and personnel actions, Organizational Management (OM) for defining roles and reporting structures, Time Management (TM) for attendance, leave, and work schedules, and Payroll for salary calculation and statutory compliance. Supporting modules include Personnel Development (PD) for skills and career growth, Training & Event Management (TEM) for learning, Performance and Compensation Management for appraisals and pay decisions, Recruitment for hiring, and ESS/MSS for employee and manager self-services. These modules work together to streamline HR processes and integrate with finance and other SAP systems.