On October 2, 2026, SwissSalary issued an alert for its users: the ISO 20022 transition period ends in six weeks. After November 13, 2026, Swiss banks will reject any payment order submitted in the legacy ISO 20022 version 2009 format (pain.001.001.03 and pain.002.001.03 messages). SwissSalary 365 clients — integrated with Microsoft Dynamics 365 Business Central — must update their banking parameters before that date (SwissSalary News, October 2, 2026).
Context: ten years of phased migration reach their conclusion
Switzerland’s migration to ISO 20022 has been coordinated by SIX Group, operator of the Swiss Interbank Clearing (SIC) system. The project began in 2016 with a phased approach designed to give ERP vendors, banks, and enterprises adequate time to adapt. In November 2022, SIX introduced updated ISO 20022 message versions into the Swiss Payment Standards (SPS) while maintaining a coexistence period with legacy formats.
That coexistence period ends on November 13, 2026 with the go-live of SIC Platform Release 5.3 (SIX Group, Swiss Payments Roadmap). From that date, only SPS 2021 formats with structured or hybrid addresses will be accepted in the Swiss interbank system. Companies that have not migrated will have their payment orders rejected — including payroll transfers.
This is not the only regulatory deadline hitting Switzerland in autumn 2026: since September 30, 2026, banks have already been rejecting QR-invoice payment orders that carry unstructured addresses (type K). Within the space of six weeks, two major deadlines are reshaping the Swiss payments chain.
Impact on SMEs using SwissSalary or an ERP with a payroll module
For IT directors and CFOs running SwissSalary 365 within Microsoft Dynamics 365 Business Central, the message is immediate: without updated banking parameters before November 13, the next payroll run risks being rejected by the bank.
In practice, three checks are essential before the deadline:
1. Verify the banking connector version. SwissSalary has built its ISO 20022 interface natively since 2017. Clients who have applied all software updates should already be SPS 2021-compliant. Those who have not installed the latest versions must do so immediately.
2. Update master banking data. The banking configuration in SwissSalary must point to SPS 2021 formats (pain.001.001.09 or later). Beneficiary addresses must use structured format: street, postal code, and city in separate fields — not a single free-text line.
3. Run a test before the deadline. Sending a test payment order before November 10, 2026 confirms that the bank accepts the new format. An error discovered on November 14 becomes an HR emergency.
For Swiss SMEs running other ERP platforms — Abacus, Bexio, or Sage 50 — the diagnosis is identical: this is a national banking infrastructure constraint, not a problem specific to any one vendor. Every solution with a payroll or supplier payment module is affected.
What to watch for
The precise implementation details of SIC Platform Release 5.3 will be communicated by SIX Group and partner banks in the weeks leading up to November 13. One note of caution: some banks may apply a short technical grace period for payments initiated just before the cutover date, but no such window is guaranteed. The practical rule: complete migration by November 10, 2026 — three business days before the official deadline.
For companies exposed on both fronts (QR-invoice and ISO 20022), autumn 2026 is a critical period for reviewing payment parameters. Bank rejections during payroll week have direct consequences for employees.
For deeper context on ERP compliance in Switzerland, see our guide to ERP in Switzerland: Abacus, Bexio, QR-invoice and VAT and our article on Abacus AI innovations for 2026.
