Workday to Nmbrs integration: global HR with Dutch payroll
With an integration between Workday and Nmbrs, new Dutch employees, contracts, salaries, bonuses and departures from Workday reach the right Nmbrs company automatically, with the effective date from Workday. After every payroll run the payslips go back to Workday, so the payroll team no longer retypes changes or compares them by hand each month.
Written by Marcel van Beek, founder and integration specialistLast updated:
What the integration does
International organisations that manage workers worldwide in Workday and process Dutch payroll in Nmbrs re-enter every Workday change without an integration. Each month the payroll team checks by hand whether both systems match.
HR records a new employee or change in Workday for the Dutch office.
KoppelHet looks up the employee in Nmbrs by employee number; a new employee goes into the right Nmbrs company.
Contract, schedule, salary and pay components reach Nmbrs with their effective date.
A departure in Workday sets the end date in Nmbrs.
After the payroll run the payslips are attached as documents to the employee in Workday.
Out: Employee and personal data · Employment and contract · Salary and recurring pay components · Bonuses and other one-off payments Back: Payslips per period
What to watch for with Workday and Nmbrs
Nmbrs retires its older integration method in 2027. We build new integrations on the new one straight away, so no migration is needed later.
Workday often provides salary as an annual amount, sometimes in another currency. KoppelHet converts it to the gross monthly euro amount Nmbrs expects.
A bonus or other one-off payment in Workday lands as a variable pay component in the period in which it is paid.
Payroll tax credit and pension scheme are usually not in Workday. They stay in Nmbrs and the integration does not overwrite them.
With several Dutch entities, each belongs to its own company in Nmbrs. KoppelHet picks the company based on the company in Workday.
Before payroll close KoppelHet compares Workday and Nmbrs. Differences appear in the platform, so the payroll team can resolve them before the run.
How we build and run it
The integration runs on the KoppelHet platform, hosted in a data centre in the EU.
Every sync and every error is visible in the functional log; on an error your administrator is notified.
A change that cannot go through is not half-applied but queued for another attempt.
KoppelHet is ISO 27001 certified. Data travels encrypted and stays on the platform no longer than needed.
After go-live we manage the integration and adjust it when your process changes.
The integration fits next to your existing integration layer. Only the fields in the design are transferred; the platform keeps no register of its own.
This is not an app you switch on. We build the integration for your organisation on our platform, with building blocks we reuse on every project. So it is custom work that does not start from scratch.
A consultant prepares the intake and analyses both systems. We then record the mapping and exceptions field by field, test in the test or acceptance environment and go live at a moment you choose. Costs are a one-off amount for the setup and a monthly amount for platform, monitoring and support.
Price indication · Complex
€ 0.000 – € 00.000
€ 000 per month
Customer case
How it runs at Hogan Lovells
How these organisations use the integration. The configuration differs for each customer.
Hogan Lovells
Legal services
Hogan Lovells manages all employees worldwide in Workday and runs Dutch payroll in Nmbrs. The integration moves new hires and changes, with contract, bank account, schedule and wage tax data, from Workday to Nmbrs automatically, with the right template per job category.
Yes, for payslips as documents. Other data can be written back, but Workday is usually the single source.
What if Workday and Nmbrs use different employee numbers?
We store the Workday number in Nmbrs and match existing employees once at the start.
Does this work for a payroll provider with many clients in Nmbrs?
Yes. We then set up the integration per client, with its own translation.
Technical details for IT
For those who want to know how it works under the hood: APIs, fields and sources used.
Workday is read through a RaaS report on change date (Employee_ID, Legal_Name, National_ID NLD, Hire_Date, Scheduled_Weekly_Hours, Base_Pay, One_Time_Payment_Plan_Reference, Cost_Center, Termination_Date). Payslips go to Workday with the Put_Worker_Document web service.
Nmbrs has a REST API and a SOAP API; the SOAP API is deprecated and retires in 2027. Fetching payslips is confirmed in the SOAP API (SalaryDocuments operations).
Which fields are transferred
The key fields. The full mapping is agreed per customer.
Field in Workday
Field in Nmbrs
Notes
Employee_ID
Personeelsnummer
Legal_Name
Voornaam, tussenvoegsel, achternaam
National_ID (NLD)
BSN
Hire_Date
Datum in dienst
Scheduled_Weekly_Hours
Uren per week (rooster)
Base_Pay
Salaris (bruto per maand)
Converted if Workday provides an annual salary
One_Time_Payment_Plan_Reference
Variabele looncomponent
Through a lookup from Workday plans to Nmbrs components
Tell us which systems you use and what should happen automatically. Together we define the smallest working solution, with a clear design and a quote before building.