● GPC
Data Changes on
Data Changes on
Demand
✓
Certified
›
Five certified features. One integration. No grey areas.
Workday Global Payroll Connect defines five integration capabilities. Most certified partners support a subset. Mercans implements every one - and operates them as a single, coherent operational surface.
● API
Additional Payroll
Additional Payroll
Data
✓
Certified
›
● GPH
Global Payroll
Global Payroll
Hub
✓
Certified
›
● EaPI
External Payroll
External Payroll
Results
✓
Certified
›
● EaPFO
External Payroll
External Payroll
Delivery
✓
Certified
›
Data Changes on Demand
The integration listens, not polls.
Acronym
DCoD
Direction
Workday → HRBlizz
Trigger
Event-driven
Latency
Sub-minute
What It Is
DCoD is the Workday-defined mechanism for delivering worker, organisation, position, and compensation data to a payroll provider on the precise event it changes - a hire, a transfer, a salary revision, a job role change. Instead of a nightly file, the payroll engine receives a streamed delta the moment Workday commits the change.
How Mercans Implements It
HRBlizz subscribes to Workday change events and ingests them through a REST endpoint backed by an audited message bus. Every payload is signed, timestamped, and persisted to a replayable store before any country-payroll engine is touched. If the downstream country-payroll module is mid-cycle, the change is queued; if it conflicts with the in-flight cycle, it surfaces in the control plane for resolution rather than silently corrupting a calculation.
Why It Matters To The Client
Payroll teams stop working from a 24-hour-old picture. A salary increase entered at 14:00 in Workday is reflected in the in-country payroll engine within minutes - not the next morning, not next cycle. For high-velocity organisations that hire, restructure, and rebadge constantly, this is the difference between catching errors before payroll runs and explaining them after.
Scenario · The intra-day correction
09:14
HR enters salary correction in Workday for Singapore employee EMP-04412
09:14+38s
HRBlizz receives, validates, persists payload.
09:14
SG country-payroll engine reflects the corrected gross.
Cycle preview re-runs.
09:14
Payroll lead sees the corrected variance in HRBlizz dashboard. No tickets. No batch re-load.
Transport
REST · TLS 1.3
Auth
OAuth 2.0 · scoped tokens
Replay Window
7 days, signed
Mapped Fields
Worker · Position · Compensation · Org · Job
Additional Payroll Data
Country-specific payroll data, captured in Workday's UI, governed by Mercans.
Scenario · New hire in Saudi Arabia
Day 0
HR completes the standard new-hire flow in Workday. DCoD pushes the worker to HRBlizz.
Day 0
+2 min
+2 min
Workday surfaces an APD task on the worker profile: GOSI registration · Iqama · municipality code · sector classification.
Day 0
HR fills the form inside Workday. The data is submitted to HRBlizz via APD - Workday never stores it.
Day 0
HRBlizz validates against in-country statutory rules. Failures return inline as Workday validation errors.
D+1
First pay cycle includes the worker fully compliant, no out-of-system spreadsheet, no parallel HR portal.
Surface
Workday UI · iframe-free
Storage
HRBlizz · in-country, never in Workday
Validation
Real-time · statutory rule engine
Country Coverage
100+ · every Mercans country
Acronym
APD
Direction
Bi-directional
Trigger
On worker event · on demand
Granularity
Per-worker · per-country
What It Is
APD is Workday's mechanism for capturing country-specific payroll data that Workday does not natively model - statutory IDs, local tax declarations, jurisdiction-specific allowance elections, garnishments, regional benefit enrolments. The form lives in the Workday UI; the data lives with the payroll provider.
How Mercans Implements It
For every country Mercans supports, HRBlizz exposes the statutory data model - the fields, valid values, validation rules, and effective-date behaviour - through APD. HR users see country-appropriate fields the moment they open a worker profile. There is no separate HR portal, no email back-and-forth with a country lead, no reconciling a spreadsheet against a workbook.
Why It Matters To The Client
A single global HR operating model becomes possible. The Workday administrator does not need to know that Saudi Arabia requires GOSI registration, that France requires a numéro de sécurité sociale, or that the UAE requires Emirates ID - HRBlizz knows. The buyer gets compliant local payroll without fragmenting the HR experience.
Global Payroll Hub
The unifying surface for global payroll inside Workday.
Acronym
GPH
Surface
Workday-native
Coverage
All connected countries
What It Is
GPH is the Workday capability that surfaces a payroll partner's data, status, and operational signals natively inside Workday - so the customer's HR and payroll teams operate from one screen, not two. Cycle status, exception counts, country-by-country progress, gross-to-net summary, all reachable inside the Workday tenant.
How Mercans Implements It
HRBlizz exposes the cycle state machine, exception register, and result summaries through the GPH-conformant endpoints. A customer's payroll lead can see, inside Workday, exactly which of their 60-country cycles are open, locked, calculated, approved, or paid - with timestamps, owner, and exception count - without leaving Workday. Drill-through into HRBlizz is single sign-on, never a separate credential.
Why It Matters To The Client
Global payroll teams collapse two operating surfaces into one. The customer's centre-of-excellence runs the global cycle from Workday; Mercans operates the in-country execution. There is no toggle between vendor portals, no mismatched status views, and no hunt across tabs to find the country that is holding up the global close.
Workday · Global Payroll Hub
Cycle 2026-04 · Day 2 of 4
62 countries| Country | Status | Excep. | Owner |
|---|---|---|---|
| United States | Approved | 0 | SK-04 |
| United Kingdom | Approved | 2 | MK-12 |
| Germany | Calculated | 1 | AH-08 |
| France | Calculated | 0 | AH-08 |
| India | In Progress | 4 | RP-22 |
| Singapore | In Progress | 4 | RP-22 |
| Brazil | On Hold | 0 | SK-04 |
| UAE | Approved | 0 | SK-04 |
External Payroll Results
Worker-level results, posted back without translation loss.
Scenario · Compensation Review
Q1
HR runs a 12-month compensation review across 14 countries inside Workday.
Q1
Each cycle's worker-level gross, deductions, employer cost, and net flow back via ExPR.
Q1
Workday holds the canonical worker history - no spreadsheet aggregation.
Q1
Reward, finance, and HRBP work from one source.
Granularity
Per worker, per cycle, per pay component
Components Mapped
Workday-defined pay component IDs
Currency
Local + reporting
Retention
Customer-defined (regulatory minima enforced)
Acronym
ExPR
Direction
HRBlizz → Workday
Granularity
Worker-level
Format
Workday pay components
What It Is
ExPR returns worker-level payroll results into Workday in the exact pay-component shape Workday's HCM expects. Where APD captures country-specific input data, ExPR returns the country-specific output data - the worker-level gross-to-net result - into Workday for HR, comp, finance, and the worker themselves through Workday self-service.
How Mercans Implements It
HRBlizz holds an explicit mapping between every country-payroll component (a French cotisation patronale, a UK National Insurance, a UAE end-of-service accrual) and a Workday pay component ID. After cycle approval, worker results stream back through ExPR - consistent shape across countries, faithful to local execution.
Why It Matters To The Client
Workday becomes the global system of truth for worker pay. No more "the comp tool says one thing and the country payroll says another." For any worker in any country, the gross-to-net history sits inside Workday - feeding analytics, comp reviews, internal mobility, and worker self-service equally.
External Payslip Delivery
The worker's payslip lives where the worker already works.
Acronym
ExPD
Direction
HRBlizz → Workday
Format
Statutory PDF, country-compliant
Surface
Workday self-service
What It Is
ExPD is the certified channel for delivering a worker's payslip - generated by the in-country payroll engine and conformant to that country's regulatory format - directly into Workday's worker self-service. The worker logs into Workday, sees the statutory payslip, downloads it. No payroll portal. No second login.
How Mercans Implements It
HRBlizz generates each country's statutory payslip in its locally-required layout and language - a French bulletin de paie in French formatting, a Saudi WPS-compliant slip in Arabic, a UK itemised pay statement in the format HMRC expects - and posts it to Workday Documents through ExPD with the correct worker, period, and document type metadata. Retention follows the customer's policy and the country's statutory minimum, whichever is longer.
Why It Matters To The Client
Worker experience consolidates. There is no "go to the Mercans portal for your payslip" message. Workday is the single front door. For an organisation paying people in 60 countries, that is the difference between one help desk ticket queue and sixty.
🇫🇷
Bulletin de paie
Avril 2026
Salaire brut
5 240,00 €
Cotisations
-1 152,80 €
Net imposable
4 087,20 €
Net à payer
3 924,40 €
🇬🇧
Pay statement
April 2026
Gross pay
£4,820.00
Income tax
-£642.40
National Insurance
-£312.00
Net pay
£3,865.60
🇦🇪
Pay slip · قسيمة الراتب
Apr 2026
Basic salary
AED 22,000.00
Allowances
AED 6,500.00
EOS accrual
AED 1,833.33
Net (WPS)
AED 28,500.00
Mercans is the only partner that does all five jobs for you.
Mercans certified every one of Workday's five GPC features. We keep Workday and payroll in sync. We handle country-specific data. We show you the payroll run live. We send results back into Workday. We deliver payslips where your people already work.
That's five jobs, one partner, zero workarounds. Other vendors certify three or four and leave the rest to your team. We don't.
| Feature | What It Solves | If Skipped | Mercans | Status |
|---|---|---|---|---|
| DCoD | Real-time HCM → payroll data flow. |
Falls back to nightly batch.
Same-day errors land next cycle. |
✓
Certified
REST event-driven |
Live
All customers |
| APD |
Country-specific payroll data inside
Workday's UI. |
Local fields collected outside Workday in
spreadsheets. |
✓
Certified
160+ countries |
Live
All customers |
| GPH | Native cycle visibility inside Workday. |
Two operating surfaces.
Status drift. |
✓
Certified
160+ countries |
Live
All customers |
| ExPR | Worker-level results & GL-ready costs into Workday. | Comp, analytics, finance work from extracts. |
✓
Certified
Component-level mapping |
Live
All customers |
| ExPD | Statutory payslip in Workday self-service. | Worker logs into a second portal. |
✓
Certified
Statutory formats |
Live
All customers |
Lifecycle event coverage
Every HR event. Every GPC service. Mapped end-to-end.
The five GPC services are not five parallel pipes - they are five layers of the same payroll machine. Most lifecycle events touch more than one. A new hire flows out on DCoD as worker data, captures statutory data on APD, runs through the cycle visible on GPH, returns as a result on ExPR, and lands as a payslip on ExPD. The matrix below is the architectural map of which Workday business event lights up which service.
| Lifecycle Event |
DCoD
HR Data
Out |
APD
Country
Data |
GPH
Cycle
Monitor |
ExPR
Results
Back |
ExPD
Payslip
Back |
|---|---|---|---|---|---|
| New hire · regular, fixed-term, part-time, intern | · | ||||
| Re-hire · including rescind & no-show | · | ||||
| Termination · voluntary, involuntary, retirement | · | ||||
| Promotion / demotion · with cost-centre change | · | · | |||
| Transfer · domestic, international, assignment | · | ||||
| Compensation change · current, future, retro | · | · | |||
| One-time payment · bonus, commission, retro | · | · | |||
| Allowance plan · add, change, end | · | ||||
| Leave of absence · start, return, correction, rescind | · | ||||
| Personal & contact data · name, address, ID | · | · | · | ||
| Payment elections · bank account add, change, split | · | · | · | · | |
| Cost allocation · split, change, rescind | · | · | · | ||
| Dependent data · add, change, remove | · | · | · | ||
| Country statutory updates · tax IDs, withholding, garnishment | · | · | · | ||
| Payroll cycle run · approval, exceptions, posting | · | · | |||
| Year-end & statutory documents · W-2, P60, Form 16, etc. | · | · | · | · |
Service is exercised by this event
·
Service is not exercised by this event
Ready for a technical walkthrough with our Workday integration architects?
Bring your Workday tenant configuration, country footprint, and a list of pain points - we'll bring the architecture diagram, the certification evidence, and a deployment timeline.
