# Connect ADP to Workday REST > Automate employee data sync, payroll workflows, and workforce management between ADP and Workday — no manual effort required. **Canonical page:** https://tray.ai/connectors/adp-workday-rest-integrations/ **ADP connector:** https://tray.ai/connectors/adp-integrations/ **ADP documentation:** https://tray.ai/documentation/connectors/service/adp **Workday REST connector:** https://tray.ai/connectors/workday-rest-integrations/ **Workday REST documentation:** https://tray.ai/documentation/connectors/service/workday-rest ## Overview ADP and Workday are two of the most capable platforms in enterprise HR and payroll, yet organizations that rely on both often end up with fragmented data and redundant manual work. When employee records, compensation changes, and workforce events have to stay current in both systems at once, errors and compliance gaps multiply fast. Connecting ADP and Workday REST through tray.ai gives you an automated data pipeline that keeps your HR systems consistent, accurate, and audit-ready. Many organizations use ADP for payroll processing and tax compliance while running Workday for core HR, talent management, and workforce planning. Keeping those platforms separate forces HR and payroll teams into double-entry data management, manual discrepancy reconciliation, and delayed updates that affect employee pay and benefits. Connecting ADP and Workday REST through tray.ai cuts out that friction. New hires created in Workday get provisioned in ADP right away, compensation changes flow in both directions without lag, and terminations trigger offboarding across both platforms at the same time. The result is a single source of truth for workforce data, less administrative overhead, and a much lower risk of payroll errors or compliance violations. ## Use cases ### New Hire Onboarding Synchronization When a new employee is created in Workday after offer acceptance and background check completion, their full profile — compensation, job classification, tax withholding details, and benefits elections — is automatically pushed to ADP for payroll enrollment. This removes the manual re-entry that typically delays a new hire's first paycheck. HR teams can be confident that every new employee is payroll-ready from day one. - Eliminate manual data re-entry for new hire records across both platforms - Ensure new employees are enrolled in payroll before their first day - Reduce onboarding errors that cause delayed or incorrect first paychecks ### Employee Termination and Offboarding Workflow When a termination is recorded in Workday — with the effective date, reason code, and final pay instructions — tray.ai automatically triggers the corresponding termination workflow in ADP to process final wages, stop recurring payroll, and update benefits cessation dates. This keeps you compliant with final pay laws and reduces exposure to regulatory penalties. HR operations teams don't need to log into both systems to complete separation processing. - Automate final payroll processing in ADP when a Workday termination event fires - Ensure timely benefits cessation to avoid overpayment and compliance risk - Maintain consistent termination records across both systems for audits ### Compensation and Salary Change Propagation Merit increases, promotions, and compensation adjustments approved in Workday's compensation module are automatically reflected in ADP payroll records without manual intervention. tray.ai monitors Workday for compensation events and maps salary, bonus, and pay frequency changes to the right ADP fields in real time — so employees are paid correctly on their next pay cycle without waiting for manual reconciliation. - Push approved compensation changes to ADP payroll immediately - Eliminate pay cycle delays caused by manual data handoffs between teams - Reduce the risk of overpaying or underpaying employees due to stale payroll data ### Workforce Position and Job Change Updates Job transfers, department changes, title promotions, and reporting structure updates processed in Workday are automatically synced to ADP to keep cost center allocations, tax jurisdiction assignments, and labor distribution records accurate. This matters especially for organizations with multi-state or multi-entity structures, where job changes carry real payroll tax implications. Keeping both systems aligned prevents expensive retroactive corrections at quarter-end. - Keep cost center and labor distribution data consistent across ADP and Workday - Automatically update tax jurisdiction assignments when employees change locations - Avoid manual reconciliation of job classification discrepancies at quarter-end ### Benefits Enrollment and Life Event Synchronization Open enrollment elections and qualifying life event changes captured in Workday Benefits are automatically sent to ADP to update payroll deductions, carrier enrollment codes, and coverage effective dates. This removes the batch file transfers and manual audits that benefits administrators typically run after each enrollment window. Employees see accurate deductions on their very next paycheck without any follow-up required. - Automate benefits deduction updates in ADP after Workday enrollment events - Eliminate manual EDI file management for carrier and payroll deduction updates - Reduce employee complaints about incorrect benefits deductions on pay stubs ### Time and Attendance Data Integration Approved time records, overtime calculations, and shift differential data from ADP's time and attendance tools can be synced with Workday's workforce and absence management modules to give a unified view of labor costs and scheduling. Finance and HR leaders can reconcile labor spend against headcount plans without exporting spreadsheets between systems. Payroll teams get a complete picture of hours worked before each payroll run. - Unify time and attendance data between ADP and Workday for accurate labor reporting - Reduce payroll run errors caused by incomplete or mismatched time data - Give finance and workforce planning teams real-time labor cost visibility ### Headcount Reporting and Workforce Analytics Alignment tray.ai can orchestrate periodic synchronization of headcount, FTE counts, turnover metrics, and organizational structure data between ADP and Workday so that people analytics dashboards reflect one consistent view of the organization. Finance teams often pull headcount from Workday while payroll reports come from ADP — that gap creates discrepancies in board-level reporting. Automated reconciliation closes those gaps and builds trust in HR data across the business. - Ensure headcount reports are consistent across ADP and Workday at all times - Eliminate spreadsheet-based reconciliation between HR and finance reporting - Improve confidence in board-level workforce metrics and people analytics ## Templates ### Workday New Hire to ADP Payroll Enrollment This template monitors Workday REST for newly created worker profiles with an active hire status and automatically creates the corresponding employee record in ADP, populating all required payroll fields including tax withholding, pay rate, pay frequency, and cost center assignment. Connectors used: Workday REST, ADP ### ADP Payroll Change Sync Back to Workday Compensation When payroll adjustments, off-cycle payments, or correction records are processed directly in ADP — such as retroactive pay or manual adjustments — this template reflects those changes back into the Workday compensation record to maintain data parity and support accurate people analytics reporting. Connectors used: ADP, Workday REST ### Workday Termination to ADP Final Pay Workflow This template listens for termination events in Workday and orchestrates the complete offboarding sequence in ADP — stopping active payroll, calculating final pay obligations based on state law, updating benefits termination dates, and logging the separation reason for compliance records. Connectors used: Workday REST, ADP ### Workday Compensation Change to ADP Payroll Update This template captures approved compensation change events from Workday — merit increases, promotions, and equity adjustments — and pushes the updated pay rate, effective date, and pay frequency directly into ADP so the change appears on the employee's next paycheck without manual intervention. Connectors used: Workday REST, ADP ### Workday Benefits Enrollment to ADP Deduction Sync After an open enrollment period or qualifying life event in Workday, this template reads finalized benefits elections and pushes updated payroll deduction codes, coverage amounts, and effective dates into ADP so employee paychecks reflect accurate benefits withholding from the next pay cycle. Connectors used: Workday REST, ADP ### Scheduled ADP-Workday Headcount Reconciliation Report This template runs on a configurable schedule — weekly, bi-weekly, or monthly — to compare active employee counts, job classifications, and salary data between ADP and Workday, flag discrepancies, and route a reconciliation summary to HR operations and finance stakeholders for review. Connectors used: ADP, Workday REST ## Challenges Tray.ai solves ### Complex Field Mapping Between Divergent Data Models ADP and Workday use fundamentally different data structures, terminology, and field naming conventions for the same HR concepts. What Workday calls a 'Business Title' may map to multiple distinct ADP fields, and compensation plans in Workday carry attributes that have no direct equivalents in ADP's payroll record schema. Building and maintaining accurate field mappings manually is time-consuming and error-prone, especially as either platform updates its API. **How Tray.ai helps:** tray.ai's visual data mapper and configurable transformation logic let teams build precise, maintainable field mappings between ADP and Workday REST without custom code. When APIs change, you update the mapping in the visual interface instead of filing an engineering ticket — that alone cuts integration maintenance overhead considerably. ### Managing Effective-Dated Transactions and Retroactive Changes Both ADP and Workday support effective-dated records, meaning changes can be backdated or future-dated. That introduces real complexity when syncing data between the two platforms. A retroactive salary adjustment entered in Workday has to be applied to the correct historical period in ADP, and future-dated hires can't trigger payroll enrollment prematurely. Getting these temporal edge cases wrong leads to compliance violations or payroll errors. **How Tray.ai helps:** tray.ai's workflow logic supports conditional branching and date-aware processing, so integrations can evaluate effective dates, determine the right timing for downstream actions in ADP, and hold or schedule API calls accordingly. Retroactive and future-dated events are handled with the precision that payroll compliance requires. ### Authentication and API Rate Limit Management ADP's API uses OAuth 2.0 with certificate-based authentication, while Workday REST has its own authentication model. Both platforms enforce rate limits that can throttle bulk synchronization jobs during high-volume periods like open enrollment, merit cycles, or year-end processing. Managing token refresh cycles and handling rate limit responses gracefully is difficult to build and maintain with custom scripts. **How Tray.ai helps:** tray.ai natively manages OAuth token lifecycles for both ADP and Workday REST connectors, handling token refresh automatically without interrupting workflows. Built-in retry logic and rate limit handling keep bulk operations throttled appropriately and resume without data loss, even during peak processing windows. ### Ensuring Data Consistency During Partial Failures In a bidirectional ADP-Workday integration, a partial failure — a successful write to ADP followed by a timeout on the Workday update — can leave the two systems out of sync in ways that are hard to detect without comprehensive error logging. HR teams may not catch the discrepancy until payroll runs, at which point fixing it requires manual research and retroactive adjustments that eat up significant time. **How Tray.ai helps:** tray.ai provides built-in error handling, dead-letter queues, and detailed execution logging for every workflow run, making it straightforward to pinpoint where a failure occurred, what data was affected, and what corrective action is needed. Automated alerts notify HR operations teams of failed records in real time so issues get resolved before they compound. ### Supporting Multi-Entity and Multi-Country Organizational Complexity Large enterprises operating across multiple legal entities, countries, or payroll groups often have distinct ADP company codes and Workday tenant configurations for each entity. Integration logic has to correctly route employee records to the right ADP instance based on work country, legal entity, or business unit. A single generic integration will misroute records and create compliance exposure across jurisdictions. **How Tray.ai helps:** tray.ai's workflow branching and configurable connector authentication let a single integration blueprint support multiple ADP company codes and Workday organizations, routing records based on employee attributes like country, legal entity, or cost center. You don't need a separate integration for each entity, and every record still gets processed by the right system configuration. ## Learn more - Intelligent Integration: https://tray.ai/platform/intelligent-ipaas/ - Merlin Agent Builder: https://tray.ai/platform/merlin-agent-builder/ - Agent Gateway for MCP: https://tray.ai/platform/agent-gateway/ - Book a demo: https://tray.ai/contact/