ml-connector
Sage 50UKG

Sage 50 and UKG integration

Sage 50 runs your on-premise accounting. UKG runs your payroll and HR in the cloud. Keeping the two in sync prevents month-end surprises when payroll journal entries do not match GL labor accounts, and it keeps Sage 50 employee records aligned with actual headcount changes. With this integration, every payroll GL posting flows directly from UKG into your Sage 50 general ledger without re-keying, and employee master data stays synchronized across both systems on a schedule you control.

How Sage 50 works

Sage 50 is a desktop-installed accounting application with no native REST API. Both the US edition (Sage 50 US, formerly Peachtree) and UK edition (Sage 50 Accounts, formerly Sage Line 50) expose vendors, customers, invoices, purchase orders, employees, GL accounts, and general journal entries through a local Windows SDK. The US edition uses the .NET SDK or legacy COM/ODBC, while the UK edition uses Sage Data Objects (SDO) COM ActiveX DLLs. Integration requires a Windows process with direct access to company data files via the ApplicationID, company data path, and Windows username and password. There are no webhooks or event streams; data changes are retrieved by polling LastModifiedDate or AuditTrail.

How UKG works

UKG exposes employee master data, compensation details, pay statements, cost centers, pay groups, and GL payroll journal entries through REST APIs at tenant-specific cloud URLs. Authentication uses HTTP Basic Auth with two custom API key headers (US-CUSTOMER-API-KEY and US-USER-API-KEY), or OAuth 2.0 client credentials with 1-hour token expiry. UKG Webhooks Premium provides near real-time event push with HMAC SHA-256 signing and 14-day retention, but polling is also available via a delta endpoint for zero-tolerance integrations. UKG Ready, the mid-market edition, uses a separate REST API surface with different auth and webhook handling.

What moves between them

Payroll and employee data move primarily from UKG into Sage 50. After each payroll run, ml-connector reads UKG's GL payroll journal export and posts each entry into Sage 50's general ledger, mapped to the matching GL accounts and cost centers. Employee records including names, IDs, compensation, and direct deposit flow from UKG into Sage 50 employee master data. Cost centers and departments are validated in both directions so payroll allocation codes in Sage 50 match UKG's pay groups and cost center setup. Reference data such as GL account mappings and employee-to-cost-center associations are aligned bidirectionally. Reads occur via polling at an interval tied to your payroll calendar.

How ml-connector handles it

ml-connector stores UKG credentials encrypted and authenticates using HTTP Basic Auth headers plus the two API key headers on every request, managing the 1-hour OAuth token expiry when webhooks are enabled. On the Sage 50 side, it maintains the ApplicationID, company data path, and user credentials required by the Windows SDK, and it runs the SDK polling loop on a Windows machine with direct access to the company data files. Because Sage 50 is pull-only with no webhooks, polling drives the sync cadence tied to your payroll schedule. GL journal line mappings are performed first, so every payroll posting references a GL account and cost center that exists in Sage 50. UKG's two-pass employee fetch (first the UUID list, then full profiles per UUID) is handled transparently. ml-connector tracks cost center changes in both systems and rejects payroll GL postings that reference a cost center not yet defined in Sage 50. Retries handle transient API failures from either system, and every record is logged in the audit trail.

A real-world example

A mid-sized services firm runs Sage 50 Accounts in the UK for general ledger and financial reporting, and uses UKG Pro for payroll processing across their London and Manchester offices. Before the integration, the finance team exported pay registers from UKG each month, manually allocated the labor costs to cost centers in a spreadsheet, and re-entered the GL postings into Sage 50 by hand. Month-end reconciliation took days because the payroll labor accounts in Sage 50 never quite matched UKG's gross and deduction totals. With Sage 50 and UKG connected, each payroll run automatically posts the correct GL entries to the right cost centers, keyed to the office where the employee is assigned. The labor accounts are now reconciled before month-end close begins, and the firm has redirected finance staff effort to analysis rather than data entry.

What you can do

  • Post UKG payroll GL journals into Sage 50's general ledger after each pay run, allocated to the correct cost centers.
  • Keep Sage 50 employee master data synchronized with UKG hires, terminations, compensation changes, and direct deposit updates.
  • Map UKG cost centers and pay groups to Sage 50 GL dimensions and cost codes so payroll lands on the right accounts.
  • Poll both Sage 50 and UKG on a payroll-calendar schedule, with retries and a full audit trail on every transaction.
  • Validate GL account and cost center existence in Sage 50 before posting payroll journals from UKG.

Questions

How does ml-connector handle Sage 50's local Windows SDK requirement?
ml-connector runs on a Windows machine with Sage 50 installed and direct access to the company data files. It authenticates to Sage 50 using the ApplicationID (for US edition), company data path, and Windows username and password, then polls the local SDK for modified employee and GL records on your payroll schedule. The integration user must not be logged into Sage 50 interactively while ml-connector's SDK session is active.
Does ml-connector handle UKG's OAuth token expiry and API key authentication?
Yes. ml-connector stores your UKG credentials encrypted and authenticates using HTTP Basic Auth with the US-CUSTOMER-API-KEY and US-USER-API-KEY headers on every request. If you enable UKG Webhooks Premium, it also manages the 1-hour OAuth token refresh, and it retries on transient failures from either system. For zero-tolerance integrations, ml-connector supplements webhooks with polling via UKG's delta endpoint.
Which direction does data move between Sage 50 and UKG?
Payroll and employee data move primarily from UKG into Sage 50. UKG's GL payroll journals and employee master data (hires, terminations, compensation) flow into Sage 50's general ledger and employee records. Cost centers and GL accounts are validated bidirectionally so payroll allocations land on valid Sage 50 dimensions. Because Sage 50 is pull-only and has no webhooks, ml-connector polls both systems on a schedule tied to your payroll calendar.

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