Why an SME may choose audit despite being below the threshold
In Switzerland, most SMEs do not exceed the size criteria that trigger mandatory ordinary audit. Companies limited by shares below those thresholds are nevertheless, in principle, subject to limited audit. With an annual average of no more than ten full-time equivalent positions and the unanimous consent of all partners or shareholders, they may also waive this control (so-called opting-out), provided they register with the commercial register before the start of the financial year.
The motivation is not regulatory, but strategic: obtaining an independent opinion on the annual accounts, strengthening the negotiating position with banks and business partners, preparing for accelerated growth or a future corporate transaction. For entrepreneurs and trustees, the question is not "are we required to?", but "how much is the additional credibility worth relative to the annual cost?"
This guide examines the Swiss legal framework, typical costs, concrete benefits for access to credit, and the effect on accounting governance, with practical guidance for those using accounting software such as Accountex to maintain audit-ready data throughout the year.
Legal thresholds and voluntary audit options
The Swiss Code of Obligations (CO) distinguishes three levels of statutory audit. Understanding them is the starting point for evaluating voluntary opting-in:
| Level | Legal basis | Thresholds (2 of 3 for 2 consecutive financial years) | Opting-out possible |
|---|---|---|---|
| No audit | Art. 727a para. 2 CO | ≤ 10 FTE on annual average (waiving limited audit) | Yes, with unanimous consent and registration in the commercial register before the start of the financial year |
| Limited audit | Art. 727a para. 1 CO | As a rule, all companies limited by shares not subject to ordinary audit | Yes, if ≤ 10 FTE and unanimous consent (Art. 727a para. 2 CO) |
| Ordinary audit | Art. 727 CO | Balance sheet total ≥ CHF 20 million, revenue ≥ CHF 40 million, 250 FTE | No |
| Voluntary ordinary audit | Articles of association / shareholders' meeting resolution (Art. 727 para. 3 CO) | Independent of size thresholds | Deliberate choice of the company |
An SME below the threshold that voluntarily opts for ordinary audit appoints an audit firm with a licensed audit expert registered in the ASR public register (RAB) and submits to Swiss professional standards (SA-CH). The auditor issues an audit report on the annual accounts, with a higher level of assurance than limited audit. The choice must be formalized at the shareholders' or partners' meeting and, where applicable, in the articles of association.
Limited audit vs voluntary ordinary audit: what changes in practice
Limited audit
Mandatory, in principle, for companies limited by shares that do not fall under the ordinary audit requirement, unless valid opting-out applies. The auditor focuses on risk analysis, targeted verification, and assessment of going concern, without the depth of a full audit.
Generally lower costs and shorter duration. Suitable when a minimum level of external control is needed without stringent requirements from lenders or investors.
Voluntary ordinary audit
Includes testing of internal controls, more extensive substantive procedures, third-party confirmations, and in-depth evaluation of accounting estimates. The auditor's opinion offers the highest level of reliability recognized in the Swiss market.
Requires more structured documentation and longer closing timelines, but is often explicitly required by banks for significant credit facilities, by institutional investors, or in preparation for M&A transactions.
Typical costs and factors affecting the quote
The cost of a voluntary ordinary audit varies widely depending on operational complexity, number of locations, presence of consolidated entities, and the quality of the underlying accounting. For Swiss SMEs below the threshold, indicative orders of magnitude as of 2026 are:
| SME profile | Indicative revenue | Ordinary audit cost | Typical duration |
|---|---|---|---|
| Micro service company | CHF 1–5 million | CHF 8,000–18,000 | 3–6 weeks |
| SME with manufacturing or trading | CHF 5–15 million | CHF 18,000–40,000 | 6–10 weeks |
| Multi-site SME or with participations | CHF 15–30 million | CHF 40,000–80,000+ | 10–16 weeks |
The main cost drivers include: transaction volume and number of accounts, complexity of valuations (inventory, receivables, impairments), related-party transactions, multi-canton VAT compliance, presence of IFRS scope or accounting standards beyond the legal minimum, and quality of supporting documentation.
Accounting maintained in an orderly manner throughout the year — with timely entries, monthly bank reconciliations, and documents attached to journal entries — significantly reduces audit hours. Structured accounting software such as Accountex can generate trial balances, account ledgers, and closing reports already formatted for the auditor, lowering recurring costs over the medium term.
Access to credit and tangible financial benefits
For an SME below the threshold, the most tangible benefit of voluntary ordinary audit often emerges in the relationship with credit institutions and other lenders:
Bank credit and financing lines
Swiss banks assess credit risk partly on the quality of financial information. For facilities above CHF 500,000–1 million, many corporate banking units require certified or audited accounts, especially if the company has a short track record or operates in sectors considered cyclical. An ordinary audit opinion reduces perceived risk premium and can facilitate better terms on interest rates, covenants, and personal guarantees from shareholders.
Cantonal guarantees and public co-financing
Loan guarantee programs (for example those managed at cantonal level or through specialized institutions) may require independently verified accounts as an admission requirement or condition for higher amounts. Audited accounts strengthen the credibility of the application and accelerate internal due diligence processes.
Leasing, factoring, and trade credit
Leasing companies and factors often review certified balance sheets and cash flows before approving contracts for machinery or invoice advances. Strategic suppliers offering extended payment terms may require officially audited financial statements before granting higher credit limits, especially in highly concentrated B2B sectors.
Preparation for investors and corporate transactions
Even without an imminent acquisition, an SME planning to bring in investors, raise capital, or sell in the future benefits from a track record of audited accounts. It reduces due diligence costs at the time of the transaction and signals mature governance to potential buyers.
Impact on accounting governance and internal controls
Voluntary ordinary audit is not merely an external compliance cost: it has a structuring effect on the quality of accounting and administrative management:
- •Separation of duties: the auditor assesses whether those who authorize payments, record transactions, and reconcile accounts are distinct individuals — a requirement difficult to meet in small SMEs, but essential to prevent errors and fraud.
- •Documentation and traceability: every accounting entry must be supported by verifiable documentation. Audit imposes discipline in document retention and digital archiving.
- •Estimates and provisions: receivable impairments, depreciation, provisions for warranties and litigation are scrutinized against uniform criteria. This reduces accounting optimism and aligns figures with economic reality.
- •Reporting to the board or shareholders: an independent auditor flags significant weaknesses and improvement recommendations, enriching dialogue with governance bodies that are often loosely structured in SMEs.
- •More predictable year-end closing: the experience of recurring audits pushes the organization to follow a rigorous closing calendar, with correct cut-offs on revenue, costs, and inventory.
For Accountex users, this translates into concrete operational practices: a chart of accounts aligned with Swiss accounting standards (Swiss GAAP FER or CO minimum), systematic recording of transactions with digital attachments, periodic reconciliation of bank and clearing accounts, structured management of fixed assets and depreciation, accounts receivable aging reports and liquidity analysis ready for the auditor's review.
When it makes sense and when it does not: decision framework
| Scenario | Recommendation | Rationale |
|---|---|---|
| Explicit bank request for a new credit facility | Voluntary ordinary audit | The auditor's opinion is often a prerequisite for approval |
| Rapid growth toward ordinary audit thresholds | Voluntary ordinary or limited audit | Anticipating the requirement avoids organizational shock and urgent adjustment costs |
| Family micro-company with no external debt | Opting-out (no audit) | Cost-benefit ratio generally unfavorable |
| Regulated sector or enterprise clients | Voluntary ordinary audit | Frequent contractual requirement in tender specifications and framework agreements |
| Disorganized accounting or non-specialist staff | Reorganize first, then audit | An audit on unreliable data generates high costs and qualified or adverse opinions |
Practical steps to introduce voluntary audit
1. Shareholders' meeting resolution and articles of association. Formalize the decision at the ordinary shareholders' or partners' meeting. Check whether the articles of association require mandatory appointment of an auditor; if not, an amendment to the articles can add the provision to avoid ambiguity in future financial years.
2. Selection of the auditor. Request at least two quotes from audit firms registered in the ASR public register (RAB) with a licensed audit expert. Evaluate sector experience, size of the dedicated team, and approach to SMEs. The auditor must be independent: no conflict of interest with directors or significant shareholders.
3. Engagement letter and audit plan. Define scope, timeline, management responsibilities, and deliverable format. Agree in advance on the expected level of detail regarding internal controls and reporting to the board.
4. Audit-ready accounting preparation. Complete the closing, prepare trial balance, notes to the financial statements, list of participations, financing agreements, fixed asset appraisals, and VAT documentation. With Accountex, export accounting reports and ensure every material transaction has supporting documents attached in the system.
5. Post-audit follow-up. Implement the auditor's recommendations in the next accounting cycle. Treat observations as a lever for continuous improvement, not merely as an annual formality. Every two to three years, assess whether the chosen audit level remains proportionate to the company's evolving size and financial profile.
Conclusion: an investment in credibility, not just an obligation
For Swiss SMEs below the threshold, voluntary ordinary audit represents a strategic choice that goes beyond legal compliance. Annual costs — often comparable to those of a specialized part-time employee — translate into easier access to credit, greater trust from business partners, and more robust accounting governance.
The decision should be calibrated to financial risk profile, stakeholder expectations, and internal process maturity. An entrepreneur with orderly digital accounting, supported by tools such as Accountex, will bear lower audit costs and achieve a faster return in terms of financial conditions and professional reputation.
Consult your trustee or auditor before amending the articles of association or formalizing the engagement, especially if the company has only slightly exceeded a size threshold or expects extraordinary transactions in the current financial year.