The short answer
Check the new legal employer, guaranteed hours, wage scale, start date and work location in writing. Then compare the old contract’s termination rules with the proposed start.
Confirm the new job before ending the old one
Agency assignments and employment agreements are not always the same length. Ask whether earlier work history is relevant to the new contract or applicable employment phase.
Keep control of the handover
Download payslips, timesheets, leave balances and pension information before old portal access ends. Check the final wage settlement, accommodation end rules and insurance arrangements separately. Tell the new payroll team whether it should apply tax credits and avoid overlapping credit application at two employers. Your existing BSN does not need replacing because your agency changes.
What to do next
- Obtain the new offer and check the old termination clause.
- Collect payroll, leave, housing and pension documents.
- Confirm the final and first payment dates and any insurance transition.
A new agency offers a Monday start, but your current contract has a notice requirement and provides housing. Clarify the employment end and accommodation arrangements before treating the weekend as a complete handover.
Questions people ask
Do I need a new BSN?
No. Changing employer does not replace your existing BSN. Update the relevant employment and contact details instead.
Can I leave the old agency immediately?
Check the actual contract, probation and termination rules. Do not assume all agency workers can leave without notice.
Will holiday balances transfer automatically?
Ask how outstanding leave and holiday allowance are settled. Do not assume the new employer inherits every balance.
What should I do about payroll tax credits?
Confirm the stop and start settings with both payroll teams so credits are not applied to two incomes at the same time.
Does new employment guarantee continued housing?
No. Read the old and new housing agreements separately and obtain written dates and costs.
Sources
Last verified: 4 October 2026. Sources are in Dutch or English.