Voluntary Standard: voluntary sustainability reporting for companies in Switzerland

The Voluntary Standard (VS) builds on the VSME standard and gives Swiss companies outside the scope of the revised CSRD a simplified framework for voluntary sustainability reporting, whether for business partners subject to the CSRD, for tenders or for financing discussions. In this guide, Forvis Mazars in Switzerland presents the main features of the VS, compares it with the revised ESRS and describes the practical impact for companies that want to use the VS.

Key insights

  • The Voluntary Standard builds on the VSME standard and supports companies that fall below the thresholds of the revised CSRD.
  • The value chain cap applies from 2027 and also protects Swiss suppliers that do not exceed 1,000 employees.
  • The draft Federal Act on Sustainable Corporate Governance (NUFG) also provides for a limit on sustainability information in the value chain.
  • Unlike the revised ESRS, the VS requires no double materiality assessment and contains 20 disclosure items.

What is the Voluntary Standard and how does it relate to the VSME?

With the adoption of the sustainability reporting standard for voluntary use (Voluntary Standard or VS) by the European Commission, a new chapter of sustainability reporting begins in the European Union. The VS is based on the previous VSME standard published by EFRAG and provides a simplified and proportionate reporting framework for companies that fall below the thresholds of the revised CSRD but still want to report their sustainability information in a structured and transparent way.

The Voluntary Standard could also become more relevant for Swiss companies. Companies that are part of the value chain of EU companies subject to the CSRD in particular may face growing requests to provide sustainability information. The VS gives them a standardised and proportionate reporting framework to prepare relevant ESG data and disclose it consistently to different business partners.

At the same time, Swiss suppliers can benefit from the European value chain cap. For financial years beginning on or after 1 January 2027, it sets the upper limit of sustainability information that companies subject to the CSRD may require, for their sustainability reporting, from business partners that do not exceed 1,000 employees. 

This protection is not limited to companies based in the EU. Information beyond the cap may still be requested, but the requesting company must clearly identify it and point out the right to decline.

Alongside regulatory obligations, market expectations from investors, lenders, customers and public sector clients for transparent and reliable sustainability information are growing. Voluntary reporting under the VS can help companies:

  • Meet these expectations
  • Reduce the effort of recurring ESG data requests
  • Provide relevant information consistently in tenders and financing discussions

As a result, companies can strengthen their position with business partners and open up new business and financing opportunities.

  • 20Disclosure items in the Voluntary Standard
  • 300Datapoints under the revised ESRS
  • 1000Employee ceiling for value chain cap protection

Download the guide

 

Sustainability reporting in Switzerland: what does the NUFG propose?

The regulatory framework in Switzerland is also evolving. With the preliminary draft of the Federal Act on Sustainable Corporate Governance (NUFG), the Federal Council aims for closer alignment with European requirements.

The Federal Council opened the consultation on 1 April 2026; it closed on 9 July 2026.

The preliminary draft also provides for a limit on the sustainability information that reporting companies may require from smaller business partners in their value chain. This limit is to be based on an international, voluntary reporting standard designated by the Federal Council.

Whether the VS will serve as the reference framework remains open. Regardless of how the law is finally shaped, Swiss companies have the opportunity to engage with the VS early and develop their sustainability reporting ahead of time.
Two hikers walking through the Swiss Alps at sunrise, surrounded by mountain peaks and green alpine landscapes, illustrating the connection between nature and sustainability.

What are the benefits of the Voluntary Standard for companies outside the CSRD scope?

The VS combines simplified language with pragmatic disclosures and gives smaller companies in particular the flexibility they need. The framework is also characterised by:

  • Its modular structure
  • Its ease of use
  • Simplified requirements for companies with 10 employees or less

With guidance prepared by EFRAG and historically relating to the VSME standard, the VS makes it easier to start voluntary sustainability reporting. However, the VS will not necessarily meet the needs of larger companies outside the scope of the revised CSRD.

Basic Module and Comprehensive Module: how the Voluntary Standard is structured

To reflect different levels of sustainability maturity, the VS comprises two modules:

  • Basic Module: sets entry-level ESG information
  • Comprehensive Module (optional): sets additional data likely to be required by investors, lenders and business partners

Companies can apply the Basic Module only or combine the Basic and Comprehensive Modules. Applying the VS does not allow a "pick and choose" approach to individual disclosures.

Both frameworks share similar qualitative characteristics and aim to create a consistent link with financial reporting.

 Voluntary Standard (VS)Revised ESRS
StructureTwo distinct modulesOne extensive set of standards
ESG topicsAll ESG topics, in far less detailAll ESG topics
Double materiality assessment (DMA)No DMA required, but it can be performed on a voluntary basis under a "VS+" approach to identify material sustainability issuesDMA required
Content20 disclosure items and a limited number of datapoints: essential, "if applicable" and voluntaryApproximately 300 datapoints, to be disclosed where material

Under the revised ESRS, companies present their material sustainability-related impacts, risks and opportunities and how they manage them.

Download the guide

What is the value chain cap?

The VS serves a dual purpose:

  • It provides a voluntary framework for sustainability reporting
  • It serves as the value chain cap provided for in the revised CSRD

This protects certain companies from disproportionate reporting demands from CSRD reporting companies.

FeatureValue chain cap
Start dateFinancial years beginning on or after 1 January 2027
Protected companiesCompanies in the value chain of CSRD reporting companies that do not exceed 1,000 employees
ScopeA defined set of VS disclosures that companies subject to the CSRD may require at most, depending on whether the company has more than 10 employees or 10 employees or less
Applies toSustainability reporting only; ESG information for other business purposes may still be requested
Right of protected companiesLegal right to decline to provide information beyond the upper limit defined in the VS, for CSRD reporting purposes

What are the main challenges when applying the Voluntary Standard?

  1. Assessing sustainability maturity: Companies should first assess their level of sustainability maturity. On that basis, they can select the most suitable reporting option and build a clear ESG roadmap.
  2. Adopting a long-term and strategic vision: Companies should embrace sustainability as a long-term strategic driver that supports their business goals, contributes to value creation and drives organisational change.
  3. Developing a robust data collection strategy: Robust data collection processes are also essential to apply the VS successfully. Companies should make full use of the guidance and support materials available from EFRAG and ensure they collect, monitor and document sustainability data reliably.
  4. Communicating sustainability performance: The VS offers more than a reporting framework. Transparent, balanced and clear reporting can build stakeholder trust. Having sustainability information audited further strengthens its credibility.

Submit an RFP

FAQ about the Voluntary Standard

Is the Voluntary Standard mandatory?

No. The Voluntary Standard is a voluntary and non-binding reporting framework for companies that fall below the thresholds of the revised CSRD but want to report their sustainability information in a structured and transparent way.

Does the value chain cap apply to Swiss companies?

Yes. The protection is not limited to companies based in the EU. Swiss suppliers that do not exceed 1,000 employees can benefit from the value chain cap for financial years beginning on or after 1 January 2027.

Can companies subject to the CSRD request more information than the value chain cap allows?

Yes. The cap is not a ban on requesting more information, but the requesting company must clearly identify any information that exceeds it, and the protected company has the legal right to decline. The cap applies to sustainability reporting only.

Will the Voluntary Standard become part of Swiss law?

This is still open. The preliminary draft of the NUFG provides for a limit on sustainability information in the value chain, based on an international, voluntary reporting standard designated by the Federal Council. Whether the VS will be that reference has not been decided.

Does a sustainability report under the Voluntary Standard need to be audited?

No. Voluntary reporting under the VS does not have to be audited on a mandatory basis. However, having sustainability information audited helps to strengthen stakeholders' confidence in it.

What simplifications apply to SMEs with 10 employees or less?

Companies with 10 employees or less benefit from simplified requirements under the Voluntary Standard. The value chain cap also distinguishes between companies with 10 employees or less and those with more than 10 employees.

Contacts