Bookkeeping Switzerland: Rules & Requirements (2026)

Every company operating in Switzerland must maintain proper accounting records. There is no exception for foreign-owned entities, dormant companies, or startups with minimal activity. If your company is registered in the Swiss commercial register, your bookkeeping obligations under Articles 957 to 963 of the Swiss Code of Obligations (CO) apply from the date of incorporation.

This page sets out what Swiss law requires, what records you must keep, how long you must keep them, and what practical issues arise most frequently — particularly for foreign-owned Swiss companies.

Legal Basis: Art. 957–963 of the Swiss Code of Obligations

Swiss bookkeeping law is codified in Articles 957 to 958f of the Swiss Code of Obligations (Obligationenrecht / CO). These provisions were substantially reformed in 2013 and apply to all legal entities registered in the Swiss commercial register, including:

Aktiengesellschaft (AG / SA)
Gesellschaft mit beschränkter Haftung (GmbH / Sàrl)
Kollektivgesellschaft (general partnership)
Kommanditgesellschaft (limited partnership)
Sole proprietors with annual turnover exceeding CHF 100,000

The law establishes a tiered system. The level of accounting complexity required depends on the legal form and size of the entity.

For a broader overview of Swiss accounting and statutory obligations, see our guide to accounting requirements in Switzerland.

Double-Entry vs. Simplified Bookkeeping: Who Must Do What

Not every entity in Switzerland is required to maintain full double-entry accounts. The law distinguishes clearly.

Entity Type	Turnover Threshold	Required Standard
AG (Aktiengesellschaft)	Any	Full double-entry bookkeeping
GmbH (Gesellschaft mit beschränkter Haftung)	Any	Full double-entry bookkeeping
General partnership (Kollektivgesellschaft)	≥ CHF 500,000	Full double-entry bookkeeping
Limited partnership (Kommanditgesellschaft)	≥ CHF 500,000	Full double-entry bookkeeping
Sole proprietor	≥ CHF 100,000 (registration) and < CHF 500,000	Simplified income/expense records
Sole proprietor	≥ CHF 500,000	Full double-entry bookkeeping

What this means in practice: If you incorporate an AG or GmbH in Switzerland — which is the case for the vast majority of foreign-owned Swiss holding, trading, and operating companies — you are required to maintain full double-entry bookkeeping from day one, regardless of turnover. There is no startup exemption and no grace period.

What Records Must Be Kept

Under Art. 957a CO, proper bookkeeping requires the following:

1. Journal (Grundbuch) A chronological record of all business transactions, recorded completely, truthfully, and systematically, with reference to supporting documents.

2. General Ledger (Hauptbuch) A classification of all transactions by account. The ledger is the foundation of the balance sheet and profit and loss statement.

3. Balance Sheet (Bilanz) A snapshot of the company’s assets, liabilities, and equity at a specific point in time — typically year-end.

4. Profit and Loss Statement (Erfolgsrechnung) A summary of income and expenses over the financial year, resulting in net profit or net loss.

5. Supporting Documents (Belege) Every entry in the books must be supported by a document — an invoice, receipt, bank statement, or equivalent. Art. 957a(2) CO is explicit: no entry without a document.

6. Notes (Anhang) — for larger companies Companies that exceed two of the three thresholds (total assets CHF 20 million; turnover CHF 40 million; 250 full-time employees) must prepare extended notes to the accounts and are also subject to statutory audit obligations.

Smaller companies — and this covers most GmbH and AG structures used by international clients — need only produce the balance sheet, P&L, and notes addressing specific disclosure items (e.g., full-time equivalent employees, long-term interest-bearing liabilities, auditor’s fees where applicable).

Retention Period: 10 Years

Art. 958f CO requires that accounting records and supporting documents be retained for 10 years from the end of the financial year to which they relate. This applies to:

Annual accounts (balance sheet, P&L, notes)
Journals and ledgers
All supporting documents (invoices, contracts, bank statements, correspondence with financial content)

Records may be kept in paper or in a recognised electronic format, provided the electronic format guarantees authenticity, integrity, and readability throughout the retention period. If you use cloud accounting software, ensure your provider meets these standards and that you retain access to historical data even if you change providers.

Digital Bookkeeping in Switzerland

Swiss law permits fully digital bookkeeping, provided the system meets the conditions set out in Art. 958f(3) CO and the Swiss Federal Council’s Ordinance on the keeping of books of account. The key requirements are:

Authenticity: Records must be protected against unauthorised alteration. An audit trail must exist for every change.
Integrity: The bookkeeping system must ensure that records cannot be deleted or modified without a trace.
Readability: Records must remain readable and accessible in their original form throughout the 10-year retention period.
Backup: Electronic records must be backed up and stored in a manner that protects against data loss.

Most established Swiss cloud accounting platforms — Bexio, Abacus, and others — are designed to meet these requirements. If you are using a non-Swiss platform, verify compliance before relying on it for statutory purposes.

Chart of Accounts in Switzerland

There is no single mandatory chart of accounts prescribed by Swiss law. However, the Kontenrahmen KMU (Chart of Accounts for SMEs) is the de facto standard for small and medium-sized Swiss entities. It follows a logical structure across eight account classes:

Class	Description
1	Assets
2	Liabilities and equity
3	Revenue
4	Cost of goods sold / direct costs
5	Personnel expenses
6	Other operating expenses
7	Financial income and expense
8	Extraordinary / prior-year items

Larger companies may use the Kontenrahmen für grössere und mittlere Unternehmen or adopt IFRS-aligned chart structures if required by a parent group, but the statutory accounts submitted in Switzerland must reconcile to the CO framework regardless.

Swiss GAAP FER: The Accounting Standard for Swiss Companies

Swiss GAAP FER (Fachempfehlungen zur Rechnungslegung) is the primary accounting standard for Swiss entities that are not publicly listed and do not apply IFRS. Key features:

True and fair view: Swiss GAAP FER requires that financial statements give a true and fair view, not merely comply with minimum CO requirements.
Modular structure: The standard is organised into a Framework and individual Standards (FER 1 to FER 30 plus special standards for specific sectors).
Applicability: Mandatory for entities with listed bonds or securities, and for large associations and foundations. Voluntary but strongly recommended for larger private companies.
Consolidation: Swiss GAAP FER 30 governs consolidated accounts for groups with a Swiss parent.

Most AG and GmbH structures used by international clients operate under the minimum CO requirements unless their size, borrowing, or group structure requires Swiss GAAP FER or IFRS.

The Financial Year

You define the financial year at incorporation. Swiss law does not mandate that you use the calendar year (1 January to 31 December). Your financial year can be any 12-month period — for example, 1 April to 31 March, or 1 July to 30 June.

Two practical constraints apply:

Consistency. Once set, the financial year must remain consistent from year to year. Changing it requires a formal resolution and creates a short accounting period for the transition year, which has tax implications.
Tax alignment. Swiss cantonal and federal tax assessments are based on the financial year of the company. The tax return is due within a specific period after the financial year end (deadlines vary by canton). In Zug, for example, the standard deadline is 30 June following the close of the financial year, with extensions available on request.

If you are incorporating a new company, discuss the optimal financial year with your adviser before filing the articles of incorporation.

Language and Reporting Currency

Language: Under Art. 957a(4) CO, accounts may be maintained in German, French, Italian, or English. For foreign-owned Swiss companies whose shareholders, directors, or parent companies operate in English, this is significant — you are not required to maintain Swiss accounts in a Swiss national language.

Currency: Accounts may be maintained in any currency material to the company’s operations. However, for Swiss tax purposes, financial statements must be presented in Swiss francs (CHF). If your functional currency is USD or EUR, you will need to apply a consistent conversion methodology (typically the year-end rate for balance sheet items and average rate for income statement items) and document this approach.

The Swiss Federal Tax Administration (ESTV) expects CHF-denominated tax accounts, and cantonal tax authorities follow the same requirement.

Swiss Tax Accounts vs. Commercial Accounts

This is an area that frequently catches foreign-owned companies off guard. Swiss tax law does not fully align with Swiss commercial accounting law, and it certainly does not align with IFRS or US GAAP.

Key differences to be aware of:

Hidden reserves (stille Reserven). Swiss commercial law permits companies to create hidden reserves through conservative asset valuation. These are not immediately taxable, but they become relevant on liquidation or sale.
Non-deductible expenses. Certain expenses correctly recorded in commercial accounts — excessive related-party fees, non-business expenses charged to the company, certain provisions — are added back for Swiss tax purposes.
Depreciation. Swiss tax law permits accelerated depreciation at rates published by the ESTV. These differ from IFRS and from economic depreciation.
Intercompany transactions. Related-party transactions must be conducted at arm’s length. Swiss tax authorities challenge intercompany service fees, royalties, or interest charges that deviate materially from market rates.
Thin capitalisation. Switzerland has safe harbour debt-to-equity ratios. If a company is over-leveraged relative to its asset base, excess interest payments may be recharacterised as hidden profit distributions and denied as a tax deduction.

For detailed guidance on the tax treatment of Swiss companies, see our page on corporate tax Switzerland.

Penalties for Non-Compliance

Failure to maintain proper books is not a minor administrative oversight in Switzerland. The consequences operate on several levels:

Director liability. Under Art. 725 and 827 CO, directors have an explicit duty to monitor the financial position of the company. If the company becomes over-indebted and directors cannot demonstrate that they maintained proper accounts and acted promptly, they may face personal liability for losses suffered by creditors.

Criminal exposure. Deliberate falsification of accounts or wilful failure to maintain books constitutes a criminal offence under the Swiss Criminal Code (Art. 166 SCC — failure to maintain accounts; Art. 251 SCC — document falsification). Penalties range from fines to custodial sentences.

Tax penalties. The cantonal and federal tax authorities may assess tax on estimated income if accounts are incomplete or unavailable. Additional interest and penalties apply. In serious cases, the matter may be referred to criminal prosecution authorities.

Company dissolution. Persistent failure to produce annual accounts or hold an AGM can, in extreme cases, lead to the cantonal registry initiating dissolution proceedings.

See our guide to corporate tax return filing in Switzerland for the interaction between accounting obligations and tax deadlines.

Common Bookkeeping Issues for Foreign-Owned Swiss Companies

Foreign-owned Swiss companies — holding companies, IP boxes, trading entities, and subsidiaries of international groups — face a specific set of bookkeeping challenges:

IFRS or US GAAP at group level, Swiss CO at entity level. Your Swiss subsidiary must maintain statutory accounts under Swiss CO regardless of what your group consolidates. This means two sets of accounts, two sets of adjustments, and a reconciliation process.

Intercompany invoicing. Management fees, intragroup loans, royalties, and shared service charges must be invoiced correctly and on time. Accruals not supported by proper documentation will be challenged.

VAT registration and reconciliation. VAT records must reconcile precisely with the bookkeeping. Errors in VAT treatment are a common audit trigger.

Timing differences. Swiss accounting follows the accrual principle. Revenue and expenses must be recognised in the correct period — especially relevant for companies that invoice annually, receive prepayments, or have multi-year contracts.

Director and shareholder transactions. Loans to shareholders, personal expenses run through the company, and undocumented payments are treated as hidden profit distributions by Swiss tax authorities and subject to withholding tax at 35%.

Bookkeeping Software Used in Switzerland

The Swiss market has a clear set of preferred platforms:

Bexio — the dominant choice for Swiss SMEs and newly formed GmbH/AG structures. Cloud-based, Swiss-hosted, integrates with Swiss banks, supports VAT filing. The most practical starting point for most of our clients. See our overview of Swiss accounting software for a full comparison.
Abacus — the standard for mid-sized Swiss companies with more complex needs, including payroll, project accounting, and multi-entity setups.
Banana Accounting — a lightweight, affordable option often used by sole proprietors and small associations. Less suited to complex GmbH/AG structures.
Sage 50 — used by a segment of Swiss SMEs, particularly those with connections to the broader European Sage ecosystem.

If you are setting up a new Swiss company and have no existing group ERP requirement, Bexio offers the best combination of functionality, cost, and compatibility with Swiss banking and tax workflows.

Outsourcing Bookkeeping in Switzerland: What It Costs

Many Swiss companies — particularly foreign-owned entities with no local finance staff — outsource their bookkeeping to a local fiduciary or accounting firm. This is standard practice and fully accepted by Swiss tax authorities.

Typical cost ranges for outsourced bookkeeping:

Simple GmbH or AG, low transaction volume: CHF 300–600 per month. This covers monthly transaction entry, bank reconciliation, basic VAT filing, and preparation of annual accounts.
Active trading company, moderate transaction volume: CHF 600–1,500 per month, depending on transaction count, complexity, and whether payroll is included.
Larger operating companies or holding structures with significant intercompany activity: CHF 1,500–4,000+ per month.

Annual account preparation (balance sheet, P&L, notes, and tax return) is typically charged separately, ranging from CHF 1,500 to CHF 5,000+ depending on complexity.

The key variable is transaction volume. A holding company with a small number of dividend receipts and management fee invoices per year costs far less to administer than an operating company processing hundreds of purchase and sales invoices monthly.

For companies that have fallen behind on their accounts, see our accounting recovery Switzerland service.

Lawsupport’s Bookkeeping Service

At Lawsupport, we provide end-to-end bookkeeping and accounting services for Swiss AG and GmbH structures, with particular expertise in foreign-owned companies.

Our bookkeeping service includes:

Monthly transaction entry and bank reconciliation
VAT return preparation and filing (quarterly or semi-annual)
Annual accounts preparation (balance sheet, P&L, notes)
Swiss tax return preparation and filing (cantonal and federal)
Liaison with cantonal tax authorities
Support for auditors where statutory audit applies
Intercompany invoicing and transfer pricing documentation support

We work with clients across 40+ countries and understand the specific requirements that arise when a Swiss entity sits within a larger international structure. All work is performed by qualified professionals with 18+ years of experience in Swiss company law and taxation.

If you are setting up a new Swiss company or taking over an existing one, we can also assist with the company formation process. See our company formation Switzerland page for details.

Request a Free Assessment

Unsure whether your Swiss company’s bookkeeping meets Art. 957–963 CO requirements? We review your current accounting setup and identify gaps — at no charge.

Request a Free Assessment{: .btn .btn-primary}

Lawsupport (Morgan Hartley Consulting) Grafenauweg 4, Zug, Switzerland Phone: +41 44 51 52 592 Email: info@lawsupport.ch We respond to all enquiries within one business day.

Frequently Asked Questions

Does my Swiss GmbH need double-entry bookkeeping even if it has no activity?

Yes. An AG or GmbH must maintain proper double-entry accounts under Art. 957 CO regardless of whether it has been active during the financial year. A dormant company still needs a balance sheet and P&L statement, even if the P&L shows no transactions. Failure to prepare annual accounts can constitute a breach of directors’ duties and expose directors to personal liability.

Who is legally required to keep books in Switzerland?

Under Art. 957 CO, all entities registered in the Swiss commercial register must keep accounting records. AG and GmbH are subject to full double-entry bookkeeping regardless of turnover. General and limited partnerships must apply full double-entry once annual turnover reaches CHF 500,000. Sole proprietors registered in the commercial register must keep simplified records from CHF 100,000 turnover, and must switch to full double-entry at CHF 500,000.

What accounting standards apply to Swiss companies — Swiss GAAP FER or CO minimum?

Most private AG and GmbH structures operate under the minimum requirements of the Swiss Code of Obligations (Art. 957–958f CO). Swiss GAAP FER is mandatory for entities with listed bonds or securities and for large associations or foundations. Larger private companies often adopt Swiss GAAP FER voluntarily to satisfy lender requirements or parent-company reporting standards. IFRS applies to listed Swiss companies and is optional for others. The statutory accounts filed in Switzerland must always comply with CO requirements as a baseline.

How long must I retain bookkeeping records in Switzerland?

Art. 958f CO requires a 10-year retention period for all accounting records and supporting documents, calculated from the end of the financial year to which they relate. This covers annual accounts, journals, ledgers, invoices, contracts, bank statements, and any correspondence with financial content. The 10-year period aligns with the maximum tax audit window in cases involving tax evasion.

Can I keep digital bookkeeping records instead of paper?

Yes, provided the system meets the conditions in Art. 958f(3) CO: records must be authentic, tamper-evident, and fully readable throughout the 10-year retention period. The system must maintain an audit trail and include adequate backup arrangements. Most established Swiss cloud accounting platforms — Bexio and Abacus among them — are designed to satisfy these requirements.

Can I maintain my Swiss company’s accounts in English?

Yes. Art. 957a(4) CO explicitly permits accounts to be maintained in English, in addition to German, French, and Italian. However, the financial statements presented for Swiss tax purposes must be denominated in CHF, and the tax return itself must be filed in one of the Swiss national languages (German in Zug and most German-speaking cantons).

What chart of accounts should a Swiss company use?

There is no single mandatory chart of accounts under Swiss law. The Kontenrahmen KMU is the de facto standard for small and medium-sized entities. Larger entities may use the Kontenrahmen für grössere und mittlere Unternehmen or adopt IFRS-aligned account structures for group reporting purposes. The statutory accounts must always reconcile to the CO framework regardless of what internal structure is used.

What is the financial year for a Swiss company, and can I change it?

You choose your financial year at incorporation — it can be any 12-month period. Once set, it must remain consistent year to year. Changing the financial year requires a formal board and shareholder resolution, creates a short transitional accounting period, and has tax implications that should be assessed in advance. In practice, most Swiss-only entities use the calendar year; companies with non-Swiss parent groups often align with the group’s financial year.

What are the consequences of not maintaining proper bookkeeping in Switzerland?

Non-compliance operates on several levels. Directors face personal liability if the company becomes over-indebted and proper accounts were not maintained. Deliberate failure to keep books is a criminal offence under Art. 166 of the Swiss Criminal Code. Tax authorities may estimate taxable income if records are absent or unreliable. In serious cases, cantonal registries can initiate dissolution proceedings. See our corporate tax return Switzerland page for related filing obligations.

What does outsourcing bookkeeping in Switzerland typically cost?

For a simple GmbH or AG with low transaction volume, expect CHF 300–600 per month for ongoing bookkeeping (transaction entry, bank reconciliation, VAT filing). Active trading companies typically fall in the CHF 600–1,500 range monthly. Larger structures with significant intercompany activity may run CHF 1,500–4,000+ per month. Annual account preparation and tax return filing are usually billed separately at CHF 1,500–5,000+ depending on complexity. The primary cost driver is transaction volume.

What happens if I do not file annual accounts on time?

Swiss law does not set a specific statutory deadline for preparing annual accounts (unlike tax return deadlines, which are set by cantonal law). However, directors have a duty to prepare accounts within a reasonable time after year-end, and shareholders have the right to inspect accounts at the annual general meeting (AGM). The AGM must be held within six months of the close of the financial year. If the company falls into a situation of capital loss or over-indebtedness and directors cannot demonstrate that proper accounts were maintained, they may face personal liability.

How far back can Swiss tax authorities audit my bookkeeping?

The ordinary statute of limitations for Swiss tax assessments is five years. In cases of tax evasion, the limitation period extends to ten years — which aligns directly with the mandatory 10-year retention period under Art. 958f CO. In practice, records from 2016 onwards remain within scope if you are audited today. Maintain complete, well-organised records for the full 10-year period.

Lawsupport (Morgan Hartley Consulting) | Grafenauweg 4, Zug | +41 44 51 52 592 | info@lawsupport.ch