Audit Costs in Switzerland: What Does a Limited Audit Cost?

Most Swiss AGs and GmbHs are legally required to have their annual financial statements audited. For the vast majority of SMEs, this entails a limited audit; a streamlined review that’s less intensive and less expensive than a full ordinary audit. Yet audit costs remain one of the most common questions business owners ask when planning their annual compliance budget.

This article covers what a limited audit costs in Switzerland, the key factors that drive pricing, how limited and ordinary audits differ, and practical steps you can take to keep your audit costs manageable.

What types of audits exist for Swiss companies?

Swiss law defines three audit scenarios for legal entities: the ordinary audit for large companies, the limited audit for most SMEs, and the option to opt out entirely for very small firms. Understanding which category your company falls into is the first step in estimating your audit costs.

The ordinary audit is required for economically significant companies. Under Art. 727 of the Swiss Code of Obligations (CO), a company must undergo an ordinary audit if it exceeds two of the following three thresholds in two consecutive financial years (as of 2026): 

• A balance sheet total of CHF 20 million, 
• Revenue of CHF 40 million, 
• 250 full-time equivalent employees on annual average. 

Publicly listed companies and those required to prepare consolidated financial statements are also subject to an ordinary audit regardless of size. The ordinary audit is comprehensive. It includes a full review of the internal control system (ICS), third-party balance confirmations, and results in a positive assurance from the auditor.

The limited audit (eingeschränkte Revision) is the standard for all other legal entities. Under Art. 727a para. 1 CO, any AG, GmbH, or cooperative that doesn’t meet the ordinary audit thresholds must have its annual financial statements reviewed through a limited audit (unless it qualifies for and exercises the opting-out option described below). This applies to the vast majority of Swiss companies. According to the Federal Audit Oversight Authority (RAB), approximately 80,000 limited audits are carried out in Switzerland each year, compared to around 10,000 ordinary audits.

The third option is opting out. Under Art. 727a para. 2 CO, companies with fewer than 10 full-time employees on annual average can waive the limited audit entirely if all shareholders unanimously consent. The waiver must be filed with the relevant cantonal commercial register before the start of the financial year it applies to. Once filed, the waiver applies to subsequent years as well (Art. 727a para. 4 CO), though any shareholder can request a limited audit at least 10 days before the general meeting.

It’s worth noting that sole proprietorships and partnerships are not subject to statutory audit obligations at all. The audit requirement applies only to legal entities.

When is a limited audit required in Switzerland?

A limited audit is required for any AG, GmbH, or cooperative that doesn’t meet the thresholds for an ordinary audit and hasn’t opted out. In practice, this covers the vast majority of Swiss companies with 10 or more employees.

Sole proprietorships and partnerships are not subject to statutory audit requirements at all. For legal entities like AGs and GmbHs, the type of audit depends primarily on size. All publicly listed companies and/or those exceeding the ordinary audit thresholds (CHF 20M balance sheet, CHF 40M revenue, 250 FTE — two of three in two consecutive years) require an ordinary audit. Smaller companies with fewer than 10 FTE on annual average can opt out entirely if all shareholders unanimously consent. Everyone in between requires a limited audit.

Practical examples: 

• A GmbH with 15 employees, CHF 3 million in revenue, and a CHF 1.5 million balance sheet total clearly doesn’t meet ordinary audit thresholds; a limited audit is therefore required. 
• A startup GmbH with 5 employees where all 3 shareholders unanimously agree to waive the audit can opt out entirely.

While opting out saves on audit costs, which is particularly useful for early-stage companies and startups, it comes with practical trade-offs. Banks and lenders frequently require audited financial statements as a condition for granting credit. If you’re planning to sell your company or attract investors, buyers and due diligence teams will almost always expect audited accounts. Some companies therefore voluntarily maintain their limited audit even when they could legally opt out, simply because it strengthens their credibility with business partners and financial institutions.

On the other side, shareholders holding at least 10% of share capital can demand an ordinary audit even when only a limited audit is legally required (Art. 727 para. 2 CO). This is known as “opting-up”. The company’s articles of association or general meeting can also voluntarily mandate an ordinary audit.

What does a limited audit cost in Switzerland?

A limited audit for a typical Swiss SME costs between CHF 3,000 and CHF 12,000 annually. Costs increase with company size, complexity, and the quality of the bookkeeping provided to the auditor.

Here’s a rough overview of market ranges by company size:

• Small companies (up to ~CHF 2M revenue): CHF 3,000–5,000
• Medium companies (up to ~CHF 10M revenue): CHF 5,000–8,000
• Larger SMEs (CHF 10M+ revenue): CHF 8,000–12,000

For comparison, an ordinary audit typically starts at CHF 10,000–15,000 for smaller mandates and can reach CHF 30,000–50,000 or more for larger companies. The significantly higher cost is due to the much broader scope of examination in an ordinary audit, including the full internal control system review and third-party confirmations.

Special-purpose audits — such as qualified formation audits involving contribution-in-kind, capital increase audits, and capital reduction audits — are separate engagements priced individually depending on the type and complexity of the transaction. For a complete breakdown of company formation costs, see our detailed guide on how much it costs to start a company in Switzerland.

Most audit firms charge hourly rates, typically ranging from CHF 200 to CHF 350 per hour depending on the auditor’s experience and the firm’s market positioning. Some firms offer fixed-price packages for specific audit tasks. 

Regardless of the pricing model, the total cost ultimately comes down to how many hours the audit requires, which is why the efficiency of your auditor and the quality of your bookkeeping preparation matter more than the rate itself. An experienced auditor who works efficiently at a fair hourly rate will often cost less overall than a less experienced one who needs significantly more time.

Nexova combines audit expertise with deep fiduciary knowledge, ensuring a smooth, efficient review that saves you time and keeps costs manageable. Contact us for a tailored assessment of your audit requirements.

What factors drive the cost of a limited audit?

Limited audit costs are fundamentally driven by how much time the auditor needs to spend on the engagement. The main factors which determine that are company size, business complexity, and the quality of the bookkeeping. Digitalization level and auditor qualifications also play a role.

Here are the main factors that influence what you’ll pay:

• Bookkeeping quality is one of the biggest cost factors. Reconciled accounts, complete documentation, and a clean year-end closing mean fewer queries and less time. Missing receipts, unreconciled accounts, and last-minute corrections all add hours and therefore cost.
• Company size plays a role because more transactions, higher revenue, and more employees all increase the audit scope. Payroll in particular is a significant area of review, covering social insurance compliance and salary reporting.
• Business complexity matters too. Multiple currencies, intercompany transactions, significant inventory, or complex revenue models require more detailed work. Certain industries, such as hospitality, real estate, and construction, also carry higher audit effort by nature.
• Digitalization level is increasingly relevant. Companies using integrated accounting software with automated bank feeds and digital documents are much faster to audit than those relying on paper-based records. Digital setups can also reduce on-site visit requirements.
• Auditor qualifications affect the hourly rate. A limited audit requires a licensed auditor (zugelassener Revisor), while an ordinary audit requires a licensed audit expert (zugelassener Revisionsexperte) with more extensive qualifications (Art. 727b and 727c CO). Rates also vary by firm size and location.
• First-year engagements tend to cost more. The auditor needs time to understand your business, systems, and accounting practices. From year two onward, that familiarity usually leads to a faster, cheaper process.

What does a limited audit actually examine?

A limited audit is a plausibility check of the annual financial statements. The auditor verifies that the numbers are reasonable and consistent, but does not conduct the deep-dive testing that an ordinary audit requires.

The scope of a limited audit is defined in Art. 729a para. 2 CO and consists of three types of procedures:

• Inquiries: interviews with management and relevant staff about significant transactions, accounting policies, and business developments.
• Analytical procedures: comparing financial statement items year-on-year and checking for anomalies or inconsistencies.
• Limited detail testing: spot-checking individual transactions and their supporting documentation.

Unlike an ordinary audit, a limited audit does not include a thorough review of the internal control system, third-party balance confirmations (e.g., from banks, debtors, or creditors), physical inventory observations, or specific fraud detection procedures beyond standard plausibility checks.

The audit concludes with a written report to the general meeting of shareholders. This report contains what’s called a “negative assurance”, i.e., the auditor states that nothing has come to their attention suggesting the financial statements don’t comply with the law and the company’s articles of association. This contrasts with an ordinary audit’s “positive assurance,” where the auditor affirmatively states that the financial statements are compliant.

Can the same firm handle both bookkeeping and the audit?

Under a limited audit, the independence requirements are less strict than for an ordinary audit. Under Art. 729 para. 2 CO, the auditor may provide other services to the company, including assistance with bookkeeping, as long as appropriate organizational and personnel measures are implemented to ensure a reliable audit. 

This means firms offering both fiduciary and audit services can serve as a single point of contact for their clients, as long as the necessary safeguards are in place. 

Under an ordinary audit, the rules are considerably stricter. Art. 728 CO generally prohibits such dual roles, meaning the auditor must be entirely independent of the company’s accounting function.

How can you reduce your audit costs?

The most effective way to reduce audit costs is to deliver clean, well-organized financial statements to your auditor. Beyond that, using modern accounting software and maintaining open communication with your audit team throughout the year makes a significant difference.

Here’s a practical checklist:

• Outsource your accounting to a professional: The most reliable way to ensure audit-ready books is to have them maintained by an experienced fiduciary throughout the year. This ensures your accounts are properly structured, documented, and reconciled from the start.
• If you handle accounting in-house, prepare a clean year-end closing: Reconcile all bank accounts and document accruals and provisions properly. Complete, well-organised supporting documents mean fewer auditor queries.
• Communicate with your auditor early: Flag unusual transactions or business changes well before year-end. Agreeing on the timeline and deliverables in advance avoids surprises on both sides.
• Avoid last-minute bookings: Late adjustments after the year-end close create additional review work and can raise red flags that trigger more detailed testing. This means more hours and higher costs.
• Choose an auditor who knows your software and industry: Familiarity with your accounting tool and sector means fewer questions and a faster sign-off.
• Consider working with a firm that offers both accounting and audit services: With the right independence safeguards in place, the handoff between preparation and review becomes more efficient. This reduces duplication of effort and keeps costs lower than enlisting entirely separate providers.

Nexova offers comprehensive accounting and audit services with the appropriate organizational and personnel safeguards to ensure audit independence. Our digital-first approach, combined with deep expertise in Swiss accounting standards and auditing, means fewer queries, faster turnaround, and a more efficient audit process overall.

What is the difference between an auditor and a fiduciary?

A fiduciary (Treuhänder) handles your ongoing accounting, tax, and business administration, while an auditor (Revisor) independently reviews your financial statements for legal compliance. They serve fundamentally different roles, and understanding the distinction helps you plan your compliance setup effectively.

The fiduciary’s job is operational: preparing annual financial statements, bookkeeping, tax returns, payroll, and providing ongoing business advisory support. 

The auditor’s job is verification: periodically reviewing the financial statements that the fiduciary (or your internal team) has prepared and confirming they comply with the law.

As discussed above, under a limited audit the same firm can provide both fiduciary and audit services, provided appropriate organizational and personnel measures are in place to ensure audit reliability (Art. 729 para. 2 CO). 

This is a common and practical arrangement for many Swiss SMEs. It allows companies to benefit from a single point of contact that understands their business holistically, while still meeting the legal requirements for an independent audit review. The key is that the firm maintains clear internal safeguards. For example, ensuring the person who performs the audit is not the same person who prepared the bookkeeping.

Under an ordinary audit, the requirements are much stricter. The auditor is broadly prohibited from providing bookkeeping services or other work that could create a risk of reviewing their own output (Art. 728 para. 2 CO).