When starting a business in Switzerland, you must not only ensure its operational success but also its legal compliance, particularly regarding financial oversight. The auditor is a key figure in this process. Responsible for auditing and verifying the company’s financial statements, they ensure transparency of the accounts and protect the interests of shareholders and third parties. However, the question arises: is it mandatory to appoint an auditor for all companies in Switzerland?

In this article, we will explore in detail the role of auditors, the different types of audits that exist, and the situations in which this appointment is required, to shed light on your responsibilities as a business leader.
The role of auditors in Switzerland
The statutory auditor is an independent auditor, often a certified public accountant, whose role is to verify a company’s annual accounts. This external verification aims to ensure that the accounts comply with current accounting standards and accurately reflect the company’s financial situation. In Switzerland, the role of the statutory auditor is essential for ensuring financial transparency for shareholders, creditors, and other stakeholders.
The mission of the auditor
The main mission of the auditor is to review the company’s financial statements. This includes a thorough examination of the balance sheets, income statements, and cash flow statements. They must ensure that the information provided is accurate and that the company complies with the current tax and accounting standards in Switzerland. Additionally, they also verify the proper functioning of the company’s internal controls to ensure that procedures are correctly followed.
At the end of his mission, the auditor drafts an audit report intended for the general meeting of shareholders, in which he presents his conclusions. This report may include recommendations to improve financial management or highlight potential irregularities in the company’s accounting. This role is crucial for maintaining investor confidence and ensuring sound management in compliance with Swiss legislation.
Statutory auditor: is it mandatory in Switzerland?
The appointment of an auditor in Switzerland primarily depends on the size and legal form of the company. There are two types of audits: ordinary audit and limited audit. Not all companies are required to conduct a full audit; some may benefit from a limited audit or even be exempt from auditing under certain conditions. The choice of audit depends on the financial criteria and the number of employees in the company.

The ordinary audit
A regular audit is required for companies that exceed two of the following three criteria for two consecutive years:
- A total balance sheet exceeding 20 million Swiss francs.
- An annual turnover exceeding 40 million Swiss francs.
- A workforce of more than 250 full-time employees.
Companies that meet these criteria are required to appoint a statutory auditor to conduct a comprehensive audit of their financial statements. This ordinary audit is a thorough and rigorous examination that ensures complete transparency for stakeholders, including shareholders, investors, and tax authorities. The statutory auditor thoroughly reviews the company’s entire accounts to ensure their compliance with accounting standards and their accuracy.
The limited audit
For smaller businesses, a limited audit may suffice. This type of audit is required for Sociétés Anonymes (SA) and Sociétés à Responsabilité Limitée (SARL) that do not exceed the financial thresholds mentioned above. The limited audit is a simplified version of the regular audit, providing less rigorous control but sufficient to ensure financial transparency.
In certain situations, small businesses with fewer than 10 employees can even opt out of the audit. To do this, it is necessary for all shareholders to agree. This process is called opting-out, and it allows small entities to lighten their administrative obligations and reduce audit-related costs.
The advantages of appointing an auditor, even if it’s not mandatory
Even if some companies are not legally required to appoint a statutory auditor, doing so voluntarily can be highly beneficial. Beyond mere compliance, appointing a statutory auditor offers several advantages that can directly impact the management and credibility of the company.
Improvement of transparency and credibility
One of the main reasons for appointing an auditor is to enhance the transparency and credibility of the company. When financial statements are reviewed and certified by an independent auditor, it instills confidence in investors, banks, and business partners. Increased transparency allows the company to stand out as a reliable and well-managed organization. Particularly for companies seeking to raise funds or establish long-term partnerships, audited accounts provide reassurance that the company adheres to high financial management standards.

Financial Risk Prevention
The use of a statutory auditor also helps prevent financial risks. Through regular external audits, companies can detect anomalies or accounting irregularities before they become problematic. This vigilance allows for early correction of errors and strengthens internal control systems, thereby reducing the risks of fraud or mismanagement. By anticipating potential financial difficulties, companies can better protect their assets and ensure a more calm and rigorous management of their finances.
Appointing an auditor, even in the absence of a legal obligation, is therefore a proactive step that can contribute to the company’s financial stability while giving it an image of transparency and reliability among its stakeholders.
How to choose an auditor in Switzerland?
If your company is subject to the audit requirement, choosing the statutory auditor is a crucial step. This decision can have a direct impact on your company’s financial transparency and compliance with current regulations. Therefore, it is essential to pay attention to certain criteria to ensure that the chosen auditor is capable of fulfilling their mission effectively.
Check the qualifications of the auditor
In Switzerland, auditors must be certified and approved by the competent authorities, such as the Federal Audit Oversight Authority (FAOA). It is therefore essential to ensure that the chosen auditor has the necessary qualifications and has been trained according to Swiss standards. Additionally, it is advisable to choose an auditor who has relevant experience in your industry. An auditor who understands the specifics of your field will be better positioned to identify areas of concern and make pertinent recommendations.
Ensure the auditor’s independence
The independence of the auditor is another essential criterion to consider when choosing your auditor. Indeed, to ensure an impartial and objective analysis of the accounts, the auditor must have no financial or personal ties with the company or its leaders. The auditor should also avoid any business relationships that could influence their judgment. This distance ensures that the audit will be conducted transparently and that the conclusions drawn will be reliable and free from conflicts of interest.

Conclusion
The auditor plays a fundamental role in the financial management of companies in Switzerland. Whether the audit is mandatory or not, appointing a qualified and independent auditor enhances financial transparency and improves the company’s credibility with investors, business partners, and tax authorities. Although some companies may opt out of an audit through opting-out, engaging an auditor remains a strategic move to anticipate financial risks and improve management practices. By adhering to the criteria of qualification and independence, you ensure that your audit will be both compliant and beneficial for the future of your company.
Questions – Answers
A commissaire aux comptes is an independent auditor responsible for reviewing and certifying a company’s financial statements to ensure their accuracy and compliance with legal standards.
No, only companies that exceed certain financial thresholds are required to appoint an auditor for a regular or limited audit. Small businesses may be exempt from this obligation.
Companies that exceed two of the following three thresholds for two consecutive years:
20 million Swiss francs in balance sheet,
40 million in turnover,
250 full-time employees.
The limited audit is a less rigorous examination of financial accounts, often required for smaller companies, such as SARL and SA, that do not exceed the previously mentioned thresholds.
Opting-out allows a company to forgo an audit, provided it has fewer than 10 employees and all shareholders agree.
Voluntarily appointing an auditor helps strengthen the financial credibility of the company, attract investors, and prevent financial risks by ensuring independent oversight of the accounts.
The cost of an audit depends on the size of the company and the type of audit required (ordinary or limited). For small businesses, this can represent a significant expense.
Yes, some companies choose to voluntarily appoint an auditor to strengthen the trust of their business partners and improve their image with banks and investors.
It is essential to choose a certified auditor with the necessary qualifications, relevant industry experience, and ensuring complete independence from the company.
SA and SARL can be subject to either a full or limited audit, depending on their size and whether they exceed legal thresholds. The audit requirement is the same for both types of companies in Switzerland.