How to Integrate UKG Pro WFM with Workday Payroll for Accurate Pay Calculations

Payroll accuracy depends on clean data flowing between your workforce management system and your payroll engine. When UKG Pro WFM (formerly Kronos) handles scheduling, time tracking, and attendance while Workday handles payroll processing, the integration between those two systems determines whether employees get paid correctly — or whether your payroll team spends every cycle chasing exceptions.

This integration is achievable and widely deployed, but it requires deliberate configuration on both sides. Here's how it works in practice and what to get right.

Understand what each system owns

Before configuring anything, get clarity on the data ownership model. UKG Pro WFM is the system of record for time and attendance: clock-ins, clock-outs, schedule adherence, overtime rules, leave balances, and pay code assignments. Workday is the system of record for payroll processing: employee records, pay rates, tax elections, deductions, and the actual payroll calculation and disbursement.

The integration moves time data from UKG to Workday — specifically, worked hours broken down by pay code, cost center, and pay period. Workday takes that data, applies pay rates and rules, and produces paychecks. If either side of the handoff is wrong, the downstream calculation will be wrong too. Workday reporting is particularly useful for validating that the data coming in matches what you expect before payroll runs.

Choose your integration method

UKG Pro WFM and Workday support integration through a few different mechanisms. The most common approach uses Workday's built-in integration framework — either a pre-built connector or a custom integration built on Workday Studio. UKG also supports outbound data exports via SFTP in formats that Workday can consume through its Integration System (EIB) or more complex Studio integrations.

Pre-built connectors reduce configuration time but may not handle every edge case in your pay code structure. Custom Studio integrations give you more control but require Workday integration developer skills. Many organizations use middleware platforms (MuleSoft, Boomi, or similar) to manage the transformation layer between the two systems, especially when pay code mapping is complex or when multiple systems need to share the same time data.

Your choice should be driven by the complexity of your pay rules, your internal technical capabilities, and how frequently you need data to flow. Digital process automation tools can significantly reduce the manual effort in this integration, particularly for exception handling when records don't match between systems.

Map pay codes carefully

Pay code mapping is where most UKG–Workday integrations break down. UKG Pro WFM tracks time against pay codes — regular, overtime, double-time, holiday, PTO, shift differential, and so on. Workday has its own earning types that must be configured to receive each of those categories. If there isn't a clean one-to-one mapping between a UKG pay code and a Workday earning type, the integration either fails silently or routes hours to the wrong earning bucket.

Document every pay code in UKG before you start. For each one, determine the corresponding Workday earning type and confirm that the tax treatment and general ledger coding are consistent. Pay special attention to overtime: UKG may calculate overtime at the record level, while Workday may need to recalculate based on its own pay period rules. Understand which system is authoritative for overtime calculation and make sure the integration doesn't create double-counting. HRIS configuration decisions like these have downstream effects across payroll, finance, and compliance reporting, so they need to be made deliberately and documented.

Establish the sync schedule and cutoff rules

The integration needs a defined schedule: how often does time data flow from UKG to Workday, and what is the cutoff for each payroll cycle? Most organizations run a final sync immediately before payroll processing begins, with interim syncs throughout the pay period for visibility and exception catching.

Cutoff rules need to be explicit: what happens if an employee's time record is edited in UKG after the payroll cutoff? Is there a retroactive adjustment process, or does the correction wait for the next pay period? These rules should be documented in both systems and communicated to managers and employees. Ambiguity here is one of the most common sources of payroll disputes.

Also define what happens with unresolved exceptions. If an employee's time record in UKG has an open exception — a missed punch, an unapproved overtime record — the integration needs a rule for how to handle it: exclude the record, send it with a flag, or hold the entire employee's data until the exception is resolved. Automating payroll processing upstream reduces the number of exceptions that reach the integration layer in the first place, which is why time-and-attendance hygiene matters for payroll accuracy.

Validate with parallel runs before go-live

Before you rely on the integration for actual payroll, run at least two parallel payroll cycles where you process payroll both through the old method and through the new integration, then compare the results record by record. The parallel run will surface mapping errors, timing issues, and edge cases that testing in a sandbox environment won't catch.

Pay particular attention to employees who have complex pay situations: multiple jobs, variable hours, recent pay rate changes, or unusual shift patterns. These are the records most likely to reveal problems in the integration logic. Have both your UKG administrator and your Workday payroll administrator review the comparison — each will see different patterns in the discrepancies.

Document every discrepancy, trace it to its root cause, and confirm the fix before moving to the next cycle. Don't go live until two consecutive parallel runs produce matching results. AI-assisted analytics tools can help surface patterns in the discrepancy data faster than manual review, especially when you're dealing with large employee populations.

Build monitoring into steady state

The integration doesn't end at go-live. Pay codes get added, earning types change, employees move between cost centers, and edge cases accumulate. You need a monitoring process that flags when the integration produces unexpected results — hours that exceed reasonable thresholds, pay codes that map to zero amounts, employee records that stop syncing without explanation.

Establish a regular reconciliation between what UKG sent and what Workday processed for each pay period. The numbers should match at the total and at the employee level. Any gap needs an explanation before you finalize payroll. Compliance-oriented payroll operations treat this reconciliation as a mandatory step, not an optional one, because the audit trail of payroll accuracy matters for wage and hour compliance as much as for employee trust.

The operational reality

A well-configured UKG Pro WFM to Workday payroll integration eliminates most of the manual data entry and spreadsheet reconciliation that teams resort to when the two systems don't talk to each other properly. It also surfaces problems faster — when time data flows automatically, discrepancies show up in Workday before payroll runs rather than as employee complaints after the fact.

Getting there takes real configuration work, pay code discipline, and parallel run patience. But once it's stable, it becomes one of the more reliable parts of your payroll infrastructure — because the rules are explicit, the data flow is auditable, and there are no humans in the loop doing copy-paste between systems.

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