Workday Financial Management and Gusto integration

What moves between them

Payroll and employee data flow from Gusto into Workday. After each payroll run, ml-connector reads Gusto payroll calculations and employee records, then posts labor cost distributions into Workday's general ledger at the corresponding GL accounts and cost centers. Employee onboarding and terminations in Gusto update Workday's headcount dimensions. Reference data such as job codes, locations, and pay types are synchronized to ensure payroll allocations land on valid Workday GL dimensions. Journal entries and AP records remain in Workday; they do not flow to Gusto.

How ml-connector handles it

ml-connector stores both credential sets encrypted: Workday credentials (ISU username and password for SOAP, or OAuth2 refresh token for REST) and Gusto OAuth2 tokens. Because Workday is polling-only and has no native webhooks, ml-connector polls Gusto payroll events on a schedule tied to your payroll calendar (typically weekly or bi-weekly, aligned to Gusto's payroll frequency), then fetches the corresponding GL-ready data from Workday's REST or SOAP endpoints. It handles Workday's tenant-specific URLs and manages OAuth2 token refresh for both systems, retrying on rate limits and 401 responses. Payroll distributions from Gusto are mapped to Workday GL accounts and cost centers (worktags); the mapping validates against Workday's active GL chart before posting. Because Gusto amounts return as string decimals, ml-connector parses and scales them to Workday's expected precision. Workday ISU account setup and security group assignments must be in place on the customer side before the integration can connect. Every record carries a full audit trail and can be replayed if a downstream GL posting fails.

A real-world example

A growing services firm runs Workday Financial Management for procurement and general ledger, and Gusto for payroll and HR across two locations. Before the integration, the finance team exported Gusto payroll registers each pay period, manually coded each employee's labor costs to Workday's GL accounts and cost centers, and reconciled headcount weekly. Payroll was delayed by manual re-keying and discrepancies between HR headcount in Gusto and labor account balances in Workday. With Workday and Gusto connected, each payroll run flows directly into Workday's GL at the correct cost centers, employee onboarding and terminations update Workday headcount in real time, and month-end close starts with labor and headcount already reconciled.

What you can do

• •Post Gusto payroll distributions into Workday's general ledger on your payroll schedule, mapped to the correct GL accounts and cost centers.
• •Keep Workday headcount dimensions synchronized with Gusto employee onboarding and terminations.
• •Map Gusto pay types, locations, and job codes to Workday GL dimensions and cost centers.
• •Manage OAuth2 token refresh for both Workday and Gusto, handle Workday's SOAP and REST transport layer, and validate GL dimensions before posting.
• •Poll on a polling interval tied to your payroll calendar, with retries and a full audit trail on every record.

Questions

Which direction does data move between Workday Financial Management and Gusto?

The main flow is Gusto into Workday Financial Management. Payroll distributions and employee records move from Gusto into Workday, while GL accounts, cost centers, and supplier data remain in Workday and are used to dimension the payroll data. Workday general ledger entries are read-only to this integration.

How does the integration handle Workday's lack of native webhooks?

ml-connector polls Gusto's webhook events (or Gusto's payroll API directly) on a schedule tied to your payroll calendar, typically weekly or bi-weekly. This avoids constant polling of Workday and aligns data delivery with your actual payroll runs. Because Gusto sends webhook events when payroll is calculated, submitted, and processed, ml-connector can react to those events by fetching the GL-ready data from Workday's REST or SOAP endpoints.

Do we need to set up a Workday Integration System User (ISU) account?

Yes. Workday Financial Management requires an ISU account with WS-Security UsernameToken credentials and appropriate security group assignments before the integration can authenticate and access GL, supplier, and cost center data. Your Workday admin must set this up in advance. If using Workday REST instead of SOAP, you will need an OAuth2 refresh token generated in the tenant.