To switch EOR providers in Switzerland, establish who employs the worker, determine the legal transfer mechanism, and confirm that the incoming arrangement is permitted. Then coordinate employment, benefits, records and payroll. A new provider’s start date does not establish legal continuity.
A qualifying Swiss business transfer can carry employment rights by law. An ordinary vendor change does not prove that a business has transferred. Where the parties instead agree a contractual handover or end one employment relationship and start another, consent, notice and permission requirements shape the sequence.
This guide uses outgoing EOR A and incoming EOR B, then carries one hypothetical Geneva employee through a conditional 1 December 2026 cutover.
What changes when you switch EOR in Switzerland?
Compare the employer named in the current employment contract and amendments with B’s proposed documents. Reconcile those identities with payslips and the assignment agreement. Different platforms may use the same employing partner; one brand may involve several entities.
Under Article 333, a qualifying transfer carries employment rights and obligations to the acquirer. If the employee refuses, the relationship ends after the statutory notice period, with performance obligations continuing until then. Entity registration identifies the parties; it does not prove this mechanism applies.
Check the incoming Swiss leasing route
SECO’s EOR guidance treats client-directed EOR/payrolling as personnel leasing. Commercial leasing generally requires authorization. Confirm B’s employing entity, cantonal licence and any required federal cross-border authorization under the licensing framework.
Ordinary commercial leasing from abroad into Switzerland is prohibited. A posting notification cannot cure that restriction. SECO separately recognizes narrow occasional intra-group exceptions; those do not establish permission for an unrelated commercial EOR switch. Confirm the actual client, workplace and employing structure.
Review the existing service and employee position
Procurement and finance review the client agreement. A, as employer, establishes the employee’s position with B and the worker.
Commercial agreement checklist
- Identify contracting companies, employing partner and intermediaries.
- Check notice, renewal, exit assistance, fees, data-export duties and surviving liabilities.
- Confirm funding dates, deposits, disputed invoices and refund conditions.
- Agree any service extension needed if employment or permissions outlast the proposed commercial end.
Employee arrangements checklist
- Collect contracts, amendments, assignment details, original start date and collective-agreement coverage.
- Reconcile wages, leave, overtime, expenses, bonus, contractual thirteenth salary and equity-plan conditions.
- Identify protected leave, illness, disputes and ongoing insurance claims.
- Check nationality, permit category, admission purpose, expiry, payroll dates and benefit coverage.
Request written confirmation of B’s legal employer, licences, worker eligibility, continuity treatment and first-payroll owner.
For the worked example, assume a 35-year-old French employee lives and works in Geneva, holds a valid EU/EFTA B permit, is taxed at source and remains in the same role. The parties’ review finds no qualifying business transfer. They propose a consensual employment transfer, conditional on agreement, validated records and incoming readiness. This is an illustrative conclusion, not a classification of every supplier change.
Establish transfer and continuity treatment
For a qualifying statutory transfer, Article 333a requires timely advance information to representatives, or employees where there are none, about reasons and consequences. Consultation on envisaged worker-affecting measures must precede those decisions.
Outside that route, establish employee agreement to a contractual transfer or a lawful employment end before new employment. Calling a document a “migration agreement” does not establish its effect.
Termination protection after probation can invalidate employer notice or suspend a running notice period, including qualifying illness and pregnancy cases. Do not request resignation or a mutual agreement to bypass that review.
CO Articles 339b to 339d also contain a narrow long-service allowance regime with pension-related offsets. Contracts or collective arrangements can add obligations. Avoid assuming severance is always zero.
Check collective coverage, benefits and mobility
The staff-leasing collective agreement has scope exclusions, including salaries above maximum SUVA-insured earnings. Article 5 aggregates specified benefits from assignments within twelve months at the same lessor, excluding probation and notice from that general rule. Its short notice rules apply specifically to temporary-work leasing. A changed intermediary does not automatically reset service.
The 2026 insurance guide explains pension coverage and vested benefits. Recognizing service does not establish identical pension or sickness-insurance benefits.
Our French worker’s EU/EFTA residence permit provides professional mobility. B still checks validity, applicable notifications and leasing eligibility.
For third-country workers, distinguish residence permits admitted for employment from restricted short stays. The Federal Supreme Court’s 22 October 2025 ruling rejected employer-specific conditions restricting job changes under Article 38(2) for employment-admitted residence-permit holders. Third-country L permits retain a restrictive approval route. Do not infer eligibility from a vendor’s willingness to issue a contract.
Set one coordinated cutover calendar
In the worked example, T is Tuesday, 1 December 2026, subject to readiness. Assume A accepts commercial cancellation on 30 November after notice received on 30 October. That contractual date does not terminate employment.
Assume the parties agree a continuing contractual handover with no new probation, specific service recognition, leave assumption and benefits effective from T. Signed documents remain conditional until the readiness decision. If that mechanism is unavailable, recalculate actual employment notice and protection requirements before choosing another date.
Dates for document review, funding, reporting target and pay are scenario agreements, not universal Swiss lead times. A pays the November wage period on assumed payday Friday, 27 November; B pays the December period on Wednesday, 23 December, with a later adjustment owner for changes after payroll cutoff.
Apply cantonal filing and holiday rules
For source-tax employees, Geneva requires entry and exit notifications within eight days of the respective event. Filing on 4 December is comfortably inside both example windows. Zurich allows monthly electronic entry reporting in its stated circumstances; its procedures cannot be substituted for Geneva’s.
The example’s review, readiness, funding and payment dates fall on weekdays. Geneva’s 2026 holiday calendar lists 25 and 31 December as holidays. The assumed 23 December pay date avoids them; B must still confirm banking and payroll cutoffs.
Give the employee a usable handoff
On 16 November, explain which employer changes, the unchanged role, specific agreed service/leave recognition, statutory rights that remain mandatory, and differences in pension, insurance, pay timing and equity treatment. Supply the transfer instrument, terms, benefits comparison, balance statement, privacy information and named A/B contacts.
The assumed 20 November response date is a planning deadline, not a statutory consent period. B answers term/benefit questions; A confirms existing balances; the client resolves coordination issues. Obtain the agreement required for this contractual route without treating silence as consent. After the 23 November decision, send confirmed dates and contacts, or a clear deferral notice.
Reconcile transition costs and cash
Use a CHF schedule distinguishing expenses, liabilities and refundable cash. An expected refund is not funding available to B.
For an ordinary Article 333 transfer, A/B joint liability covers the provision’s specified employee claims. Commercial close cannot erase those claims; insolvency transfers have separate Article 333b treatment.
Reconcile this worker’s leave, wages and funding
Assume the agreed annual leave is 24 days, accrued at two days monthly. A confirms eight unused days at 30 November; B expressly assumes them under the consensual transfer. The worker takes 28, 29 and 30 December as three leave days. Those are weekdays, distinct from Geneva’s 31 December holiday.
CO Article 329d generally prohibits exchanging holiday entitlement for money during continuing employment. This example carries the agreed balance rather than creating an automatic cash payout at the provider change.
All amounts are hypothetical; the CHF 1,700 is a budgeting input, not a statutory contribution calculation. Gross wages include the scenario’s agreed payable components. Actual deductions, contribution bases, pension and tax determine the payslip; no net pay is inferred here.
Test the first payroll and close the old arrangement
Mark each control pass/fail, with evidence and a correction owner:
- Periods and YTD: A retains November earnings and historical reporting; B books December earnings once. Historical CHF 71,500 is not added to the December payment file.
- Deductions/contributions: validate AHV/IV/EO, unemployment, pension, accident and source-tax inputs, periods and applicable ceilings.
- Coverage and claims: confirm outgoing/incoming dates, pension handover, sickness cover and existing claim ownership.
- Balances: reconcile leave, overtime, expenses, variable pay and applicable thirteenth salary to signed statements.
- Payment and filings: designate one wage release per period, exception owners, notification receipts and later annual reports.
- Employee close: deliver accessible payslips, the confirmed seven-day year-end leave balance and salary-certificate arrangements; B handles incoming discrepancies and A corrects its period.
- Cash: reconcile funding, invoices, deposit deductions and the actual refund before financial close.
Parallel testing compares calculations, not two live wage payments. The federal insurance guide separates contribution advances from the annual wage declaration due by 31 January of the following year. Closing A’s portal must not orphan later reporting. Suva’s coverage rules also distinguish occupational/non-occupational cover and continuation; they do not replace incoming coverage.
If A delays or refuses records
The client’s transition owner escalates the contractual request to A; B’s payroll lead decides whether evidence is sufficient. Minimum verified inputs are identity/AHV number and work eligibility; signed terms and pay components; last paid period and relevant YTD detail; tax status; leave/overtime/variable-pay balances; and benefit dates/claims.
With a lawful basis and appropriate employee involvement, reconstruct only necessary data from employee-held contracts/payslips, approved client records and authorized fund/insurer confirmations. B reconciles provenance and totals; the employee verifies personal facts and balances. An unsupported spreadsheet or bank receipt alone cannot establish the full payroll position.
The FDPIC’s rules limit processing and require permitted foreign transfers. Its employment guidance also protects third-party disclosure and sensitive files. Refusal does not authorize privacy bypasses.
If the minimum record cannot be validated by 23 November, defer T before A’s payroll closure or any irreversible employment exit. Agree a lawful service/employment extension with A and update documents, coverage, funding and employee communications. If continuation is unavailable, establish another lawful arrangement or pause work; do not run an unverified payroll to preserve the sales date.
Two employee situations that change the switch
Hypothetical case: independently authorized Geneva worker
For the French EU/EFTA B-permit holder above, professional mobility removes the assumed employer-change approval dependency. It does not establish statutory transfer protection.
The 1 December handover proceeds only if the consensual mechanism, required agreement, record validation, coverage and funding are confirmed on 23 November. A pays November; B pays December, carries the eight leave days and ends December with seven after accrual/use. If records or consent fail, the fallback applies and the date moves.
Hypothetical case: third-country L-permit holder
Replace the worker’s status with a third-country L authorization linked to A’s employment. B must establish employer-change approval and personnel-leasing eligibility with the competent authority. Same role and client do not prove permission.
The December date remains conditional even if payroll data is perfect. Approval may be unavailable; a different lawful route or later date may be required. The employee does not resign on the assumption that B’s contract authorizes work. No work continues through an unauthorized gap.
Questions about switching EOR in Switzerland
Must employees resign?
No universal resignation step applies. Establish whether the employer stays the same, Article 333 governs, the parties agree a contractual transfer, or lawful termination/new employment is needed.
Does copying the original start date preserve every right?
Specify recognition for each entitlement. Statutory continuity, contractual service recognition, pension arrangements and equity-plan conditions require separate answers.
Can we switch during sick or family leave?
Possibly, depending on the mechanism. Protected-period rules can prevent or delay employer termination; preserve existing wage and insurance claims.
Does switching reset an assignment limit?
Do not presume a reset. Identify the permit, collective or service-based rule. Same-lessor aggregation does not establish automatic continuity between unrelated employers.
What if the incoming date is missed?
Reconfirm a lawful extension or another permitted route, adjust payroll and benefits, and inform the employee. An agreed sales date cannot override unresolved consent, permission or record requirements.
For broader obligations, see our Swiss employment guide. To assess a proposed switch, speak with Borderless AI about the employing arrangement, worker category and cutover dependencies. Our EOR services include employment, payroll and benefits administration; confirm the specific Swiss route before committing to an exit.
