Swissdec: ELM standard and certification of Swiss payroll software

Q: What is the ELM standard?

ELM (Einheitliches Lohnmeldeverfahren, English: Uniform Salary Reporting) is the technical standard defined by Swissdec for the electronic transmission of salary data. It standardises the data format (XML) and the transmission protocol, allowing an employer to submit annual salaries to all institutions in a single operation from their payroll software.

Q: Which institutions receive data via Swissdec?

Via the ELM standard, an employer can transmit in a single submission: data for the AHV/IV/EO compensation fund, unemployment insurance (AC), SUVA or the LAA accident insurer, data for salary certificates to the cantonal tax authority, and statistics for the Federal Statistical Office (FSO).

Q: What does 'Swissdec certified' mean for payroll software?

Swissdec-certified software has successfully passed all technical and functional tests defined by the association. Certification guarantees that the software generates ELM-compliant data, covers all mandatory payroll items and can transmit data to all partner institutions. It must be renewed for each new major version of the standard.

Definition

Swissdec is a non-profit association founded in 2001, bringing together Swiss public and private partners (compensation funds, cantonal tax authorities, insurers, the FSO and software publishers). Its role is to define, maintain and certify the ELM standard (Einheitliches Lohnmeldeverfahren / Uniform Salary Reporting), which standardises the electronic transmission of salary data in Switzerland.

How it works

Without Swissdec, an employer had to transmit salary data separately to each institution (AHV fund, SUVA, cantonal tax authority, FSO), in different formats. With the ELM standard, the process becomes:

The certified payroll software generates an XML file compliant with the ELM standard, containing all the company's annual salary data.
The employer transmits this file once via the Swissdec secure platform (the "Distributor").
The Swissdec Distributor automatically routes the data to each recipient institution: AHV/AC fund, LAA/SUVA insurer, cantonal tax authority (for salary certificates and withholding tax), and the FSO.
Each institution acknowledges receipt and returns a processing status to the payroll software.

This "one-stop" process significantly reduces the administrative burden on HR departments and fiduciaries.

The ELM standard

The ELM standard is versioned. Successive versions have expanded functional coverage (new payroll items, new recipients, new validations). Software certification is specific to a version of the standard: a publisher must re-certify its software when moving to a new major version.

Data covered by ELM includes:

Gross salaries and statutory deductions (AHV, AC, AANP, BVG/LPP, withholding tax)
Employees' personal data (name, address, AHV number, canton of domicile)
Information for the annual salary certificate
Salary statistics for the FSO

Swiss context

The Swissdec standard is a cornerstone of administrative simplification for Swiss SMEs. It forms part of the federal e-government strategy. Most Swiss cantons have adopted ELM as the preferred channel for receiving salary data from their taxpayers.

Participation in Swissdec is voluntary for employers, but using certified software guarantees the compliance of transmissions and reduces the risk of errors or rejections by institutions.

How Neoffice integrates it

Neoffice integrates the Swissdec ELM standard into its payroll management module. Employers can trigger the annual transmission of their salary data directly from the ERP, with no export or manual re-entry. The salary certificate is generated in accordance with Swissdec requirements and can be submitted to cantonal tax authorities via the same channel.