Accounting Services Switzerland: Bookkeeping, Audit & Tax for Swiss Companies (2026)

Every Swiss company — whether an AG, a GmbH, or a branch — is legally required to maintain proper accounts under the Swiss Code of Obligations (Art. 957–958f CO). Accounting services in Switzerland cover monthly bookkeeping, annual accounts preparation, VAT reporting, and corporate tax return filing. This applies from the moment your company is incorporated, regardless of turnover or activity level.

This article explains what Swiss law requires, what the common pitfalls are for foreign-owned companies, how audits work, and what Lawsupport’s accounting service covers. If you are running a Swiss company from abroad — or you have just incorporated one and are trying to understand your obligations — this is the practical reference you need.

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Swiss Accounting Obligations: The Legal Foundation

Swiss accounting law does not distinguish much between large corporations and small owner-managed companies. All legal entities registered in the Swiss Commercial Register are required to:

• Keep orderly financial records that accurately reflect the company’s financial position
• Prepare annual accounts at the end of each financial year
• Retain accounting records and supporting documents for ten years (Art. 958f CO)

The relevant statutory basis is Art. 957–958f CO. These provisions were substantially modernised in 2013 and apply to all legal forms: AG (Aktiengesellschaft / société anonyme), GmbH (Gesellschaft mit beschränkter Haftung / société à responsabilité limitée), associations, foundations, and sole proprietors above certain thresholds.

The full text of the statutory provisions is available on fedlex.admin.ch, the official Swiss legal database.

Double-Entry Bookkeeping vs. Simplified Cash Accounting

The type of accounting your company must maintain depends on its size:

Double-entry bookkeeping (doppelte Buchführung) is mandatory for:

• All companies with annual turnover exceeding CHF 500,000, regardless of legal form
• All legal entities (AG, GmbH) — by definition, regardless of turnover, because they are subject to the full annual accounts requirements under Art. 958 CO

Simplified cash accounting (income and expenditure statement plus a statement of assets and liabilities) is permitted only for:

• Sole proprietors and partnerships with annual turnover below CHF 500,000 (Art. 957 para. 2 CO)

In practice, if you have incorporated a GmbH or AG in Switzerland, you are on full double-entry bookkeeping from day one. There is no simplified option for incorporated entities.

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The Financial Year in Switzerland

Swiss law does not require your financial year to follow the calendar year (January–December). You can choose any 12-month period — for example, April 1 to March 31 — as your fiscal year, provided it is defined in your articles of association and applied consistently year to year.

That said, the large majority of Swiss companies use the calendar year. This simplifies coordination with Swiss tax authorities, VAT reporting periods, and salary reporting to AHV/AVS social insurance funds.

For foreign-owned subsidiaries, there is often pressure to align the Swiss fiscal year with the parent company’s fiscal year. This is legally permissible, but it creates complexity: Swiss tax returns follow the fiscal year, VAT quarters must be mapped carefully, and first-year accounting periods can be longer or shorter than 12 months if the company was incorporated mid-year.

Key rule: Once you have chosen a financial year, you need cantonal tax authority approval to change it. Do not choose a fiscal year without thinking through the implications.

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Annual Accounts: What Swiss Law Requires

Under Art. 959 CO, the annual accounts of a Swiss company must include three components:

1. Balance sheet (Bilanz / bilan) — a snapshot of assets and liabilities at the end of the financial year
2. Income statement / Profit and Loss account (Erfolgsrechnung / compte de résultat) — revenues, costs, and net result for the year
3. Notes to the accounts (Anhang / annexe) — disclosures required by law, including accounting policies, contingent liabilities, and related-party transactions (Art. 959c CO)

For larger companies (those subject to ordinary audit — see below), a cash flow statement and a management report (Lagebericht) are also required under Art. 961 CO.

The annual accounts must be prepared in Swiss francs (CHF) and in one of Switzerland’s national languages (German, French, or Italian) or in English, provided that the official language version is also available on request. In practice, Zug, Zurich, and German-speaking cantons use German; Geneva and Lausanne use French.

Annual accounts must be approved by the shareholders within six months of the end of the financial year (Art. 699 CO for AG; Art. 805 CO for GmbH). For a GmbH, this means a shareholders’ meeting or written resolution. For an AG, the annual general meeting (AGM) formally approves the accounts.

For guidance on preparing and filing the annual corporate tax return in Switzerland, see our dedicated article.

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Statutory Audit Requirements Under Swiss Law

Swiss law establishes three levels of audit obligation, governed by Art. 727–731a CO and related provisions:

The Three Audit Levels

Audit Level	Trigger	Who Conducts It
Ordinary audit (Ordentliche Revision)	Company meets at least 2 of 3 thresholds: > 250 FTE average, > CHF 40M turnover, > CHF 20M balance sheet total — OR is a listed company, or part of a group required to prepare consolidated accounts	Licensed audit firm (Revisionsexpertin / expert-réviseur agréé)
Limited audit (Eingeschränkte Revision)	Default for all other AG and GmbH not qualifying for audit opt-out	Licensed auditor (Revisorin / réviseur agréé) — a lower licence tier
Audit opt-out (Opting-out)	Company has fewer than 10 full-time employees AND all shareholders unanimously agree to waive the audit (Art. 727a para. 2 CO)	No audit required

Audit Thresholds at a Glance

Threshold	Value
Employees (FTE)	> 250
Annual turnover	> CHF 40,000,000
Balance sheet total	> CHF 20,000,000
Trigger rule	Meet 2 of 3 for two consecutive years

Ordinary audit is the most demanding: the auditors must issue an opinion confirming the accounts are true and fair and comply with Swiss law and the articles of association.

Limited audit is a lower-intensity review — auditors check whether anything has come to their attention suggesting the accounts are not properly prepared. It is not a full audit in the internationally understood sense.

Audit opt-out is by far the most common outcome for foreign-owned SMEs with a lean structure. If your Swiss GmbH has two shareholders, no local staff, and turnover under CHF 10M, you can opt out entirely. This must be documented in the articles of association or by a unanimous shareholder resolution — and it must be renewed if ownership changes.

If you are unsure which tier applies to your company, this is something Lawsupport determines during the initial accounting setup.

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Tax Accounting vs. Commercial Accounting in Switzerland

Swiss commercial accounting and Swiss tax accounting are closely related but not identical. The taxable profit reported to the cantonal tax authority starts with the commercial profit (net result per the annual accounts) and then applies statutory adjustments (Aufrechnungen / reprises fiscales).

Common adjustments include:

• Non-deductible expenses added back: excessive management fees to related parties, private portions of costs, voluntary provisions not recognised for tax
• Tax-privileged write-downs on participations or fixed assets (Art. 62 DBG / Art. 28 StHG)
• Intercompany pricing adjustments if the tax authority challenges transfer prices
• Loss carry-forward from prior years deducted from taxable profit (Art. 67 DBG — losses may be carried forward for up to seven years)

Switzerland uses a one-layer system for corporate tax — there is no separate tax balance sheet in most cantons. The commercial accounts are the starting point, and adjustments are made on the tax return. This is simpler than systems like the German HGB/tax-balance-sheet split, but it still requires your accountant to know both the commercial and tax rules.

For more detail on Swiss corporate income tax rates and the cantonal comparison, see our article on corporate tax in Switzerland and the cantonal tax comparison.

The Federal Tax Administration (ESTV) publishes the official corporate tax rates and guidance at estv.admin.ch.

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Common Challenges for Foreign-Owned Swiss Companies

1. IFRS / US GAAP to Swiss GAAP Conversion

If your parent company reports under IFRS or US GAAP, your Swiss subsidiary must still prepare its statutory accounts under Swiss CO accounting standards (Swiss GAAP FER is optional for larger groups; most SMEs simply follow CO rules). The differences matter: Swiss CO allows certain provisions and reserves that IFRS does not; leases are treated differently; deferred taxes are not required at the SME level. Your consolidation team needs a clear reconciliation.

2. Fiscal Year Alignment

If your group fiscal year ends June 30 and your Swiss company has a December 31 year-end, the parent’s consolidation team will need interim figures. Switching the Swiss fiscal year requires tax authority approval and triggers a short financial year, which has its own tax implications.

3. Intercompany Transactions

Switzerland has strict rules on related-party transactions. Management fees, royalties, and intragroup loans must be priced at arm’s length. The Swiss tax authorities (Eidgenössische Steuerverwaltung, ESTV / AFC) actively scrutinise thin capitalisation and will impute interest income if a Swiss entity lends to its parent at below-market rates. For specialist guidance on this area, see our article on tax advisory in Switzerland.

4. Thin Capitalisation Rules

Switzerland publishes annual safe-harbour debt-to-equity ratios by asset class. If a Swiss company is funded primarily through intercompany loans, the tax authority may reclassify a portion of the debt as hidden equity (verdecktes Eigenkapital), disallowing the interest deduction and potentially triggering withholding tax on the reclassified distribution. Withholding tax (Verrechnungssteuer) is levied at 35% on dividends and certain interest payments under Art. 4 VStG.

5. Accounting Catch-Up

Foreign entrepreneurs who incorporated a Swiss company but then did not prioritise local accounting often arrive at year three with three years of unreconciled transactions, missing bank statements, and no annual accounts approved by shareholders. This is fixable, but it requires a structured catch-up engagement — and the sooner it is addressed, the cheaper it is.

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Accounting Software Used in Switzerland

Switzerland has its own software ecosystem. The most common platforms are:

• Bexio — cloud-based, widely used by SMEs and startups, strong integration with Swiss banks and MWST reporting. Simple and cost-effective for companies under ~CHF 5M turnover.
• Abacus (AbaNinja for SMEs, Abacus ERP for larger companies) — the dominant professional-grade Swiss ERP. Highly customisable, used by most Swiss fiduciary firms.
• Sage 50 / Sage 200 — popular in the SME segment, well-integrated with Swiss payroll and HR modules.
• Banana Accounting — lightweight double-entry software, strong following among small NGOs, associations, and very small companies.

Lawsupport uses Abacus for client work. If a client already uses Bexio, we can work within that environment. We do not require clients to purchase or manage software themselves — our fee includes the bookkeeping environment.

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VAT Accounting and MWST Reporting

Swiss VAT (Mehrwertsteuer, MWST / TVA) is accounted for separately from income tax. If your company is registered for VAT — mandatory above CHF 100,000 annual turnover (Art. 10 MWSTG), optional below — you must file quarterly or semi-annual MWST returns with the Federal Tax Administration (ESTV).

The current Swiss VAT rates (as of 2024) are:

• Standard rate: 8.1%
• Reduced rate: 2.6% (food, books, medicines, newspapers)
• Special rate: 3.8% (accommodation services)

VAT accounting involves tracking input tax (Vorsteuer) and output tax (Umsatzsteuer) and reconciling these with the accounts. Common errors include:

• Failing to distinguish between taxable, exempt, and zero-rated supplies
• Not reclaiming input tax on business expenses
• Incorrect treatment of import VAT on goods
• Missing the partial-taxation rules for companies with mixed taxable and exempt activities

For a detailed explanation of Swiss VAT registration and reporting, see our dedicated article on VAT in Switzerland.

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Payroll and AHV / Social Insurance Administration

If your Swiss company employs staff — including directors domiciled in Switzerland — you are required to:

• Register as an employer with the cantonal AHV/AVS compensation office (Ausgleichskasse)
• Withhold and remit AHV/IV/EO contributions (currently 10.6% of gross salary, split equally between employer and employee)
• Enrol employees in a BVG/LPP occupational pension fund (second pillar) if they earn above the entry threshold (~CHF 22,680 per year)
• Handle source tax (Quellensteuer) for foreign employees without a Swiss C permit
• Submit annual salary statements (Lohnausweis) to the cantonal tax authority

Payroll in Switzerland is more administratively intensive than in many other jurisdictions. Lawsupport handles payroll administration as part of its full-service accounting package.

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What Lawsupport’s Accounting Services Include

Lawsupport (Morgan Hartley Consulting) provides end-to-end accounting support for Swiss AG and GmbH companies, with a particular focus on foreign-owned entities where the shareholders are not based in Switzerland.

Our standard accounting service covers:

• Monthly bookkeeping — recording all transactions, bank reconciliation, accounts payable/receivable tracking
• Quarterly VAT returns — preparation and electronic submission of MWST reports to the ESTV
• Annual accounts preparation — balance sheet, P&L, and notes in accordance with Swiss CO, ready for shareholder approval
• Corporate tax return — preparation of the cantonal and federal tax return (Steuererklärung), including calculation of capital tax
• Audit coordination — liaison with your statutory auditor for limited audit; selection and instruction of auditors if you do not already have one
• AHV/payroll administration — monthly salary processing, social insurance payments, annual Lohnausweis preparation
• Year-end closing — accruals, prepayments, depreciation schedules, provisions
• Director/shareholder reporting — quarterly management accounts in English on request

We do not outsource bookkeeping work offshore. All work is done by qualified staff based in Switzerland.

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Typical Costs: Accounting Services for Swiss Companies

Accounting costs in Switzerland vary considerably by company size, transaction volume, and whether payroll is included. The following are indicative ranges for Lawsupport’s services:

Small Swiss company (GmbH or AG, 0–2 employees, up to ~CHF 2M turnover, up to ~150 bank transactions/month):

• Monthly bookkeeping + quarterly VAT + annual accounts + tax return: CHF 3,000–6,000 per year

Medium Swiss company (up to 10 employees, CHF 2M–15M turnover, 150–500 bank transactions/month):

• Full-service accounting including payroll: CHF 8,000–20,000 per year

Catch-up / back-year accounting (where prior years have not been done):

• Quoted separately based on the volume of work; typically CHF 1,500–4,000 per year requiring catch-up

All fees are quoted in Swiss francs and are subject to VAT at the standard rate of 8.1%.

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Real-World Scenario: Foreign-Owned GmbH Needing Accounting Catch-Up

A common situation we handle at Lawsupport: a UK-based entrepreneur incorporated a Swiss GmbH in Zug three years ago as part of a restructuring. The company holds a software licence and invoices a related UK entity. For the first two years, the entrepreneur assumed the Swiss accountant at the formation agent was handling the books. It turned out only bank reconciliations were being done — no annual accounts were prepared, no tax returns were filed, and VAT registration had lapsed.

By the time the client contacted Lawsupport, the company had:

• Three years of unfiled tax returns (late-filing penalties accumulate in most cantons)
• No approved annual accounts (meaning distributions or formal closure were blocked)
• An expired VAT registration, creating a retroactive registration obligation
• Intercompany invoices that had not been recorded correctly

We addressed this over a four-month engagement: reconstructed the books from bank statements and invoices, prepared three years of annual accounts, filed the outstanding tax returns, and re-registered for VAT. The total cost was approximately CHF 14,000 — significantly more than it would have cost to maintain proper accounts from the start.

The lesson: Swiss accounting is not complicated, but it requires consistent attention. Deferred maintenance is expensive.

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Get Your Swiss Accounting in Order

Whether you are setting up a new Swiss company, taking over accounting from a previous provider, or dealing with a backlog, Lawsupport can help. We work with foreign-owned Swiss companies across all industries and have been doing so for over 18 years, with more than 1,000 company formations completed for clients from 40+ countries.

Related services:

• Company formation in Switzerland
• GmbH formation in Switzerland
• Corporate tax in Switzerland
• VAT in Switzerland
• Cantonal tax comparison
• Tax advisory in Switzerland

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Frequently Asked Questions

Do I need an accountant for my Swiss GmbH if I have no activity?

Yes. Even a dormant Swiss GmbH must prepare annual accounts under Art. 958 CO, file a corporate tax return, and hold a shareholders’ meeting (or written resolution) to approve the accounts. The minimum annual cost for a dormant company with no transactions is typically CHF 1,500–2,500 per year. If the company remains inactive for an extended period, voluntary liquidation is worth considering.

Can I do the bookkeeping myself and only hire Lawsupport for the tax return?

In principle, yes — Swiss law does not require you to use a fiduciary for bookkeeping. However, the tax return is only as good as the underlying accounts. In practice, we find that self-prepared bookkeeping almost always requires significant correction before a tax return can be filed, which means the cost savings are often illusory. We recommend a professional review of the books at least quarterly.

What is the deadline for filing the Swiss corporate tax return?

Deadlines vary by canton. In Zug — the most common canton for foreign-owned companies — the tax return is due within six months of the end of the financial year. Extensions can be requested and are routinely granted for companies represented by a fiduciary, often to 31 December of the following year. Filing late without an approved extension triggers penalty interest and, eventually, a discretionary assessment.

My Swiss company has shareholders and directors in multiple countries. Does that affect the accounting?

Structurally, no — Swiss accounting obligations under Art. 957 CO apply regardless of where the shareholders or directors are resident. Practically, yes: intercompany transactions, management fees, and loan arrangements between the Swiss company and its foreign shareholders or parent will be scrutinised by the Swiss tax authority. Transfer pricing documentation is advisable for any significant related-party flows.

What happens if I miss the annual accounts deadline?

Missing the deadline to prepare and approve annual accounts (six months after financial year-end) does not trigger an automatic penalty under Swiss company law, but it creates downstream problems: you cannot make formal distributions, you cannot apply for bank financing, and you may trigger concerns if you are audited or change directors. Persistent non-compliance can — in extreme cases — lead to the company being struck from the Commercial Register.

What is the corporate income tax rate in Switzerland?

Switzerland’s effective corporate income tax rate varies by canton. At the federal level, the rate is a flat 8.5% on profit after tax (effective rate: approximately 7.83%). Combined with cantonal and communal taxes, the effective combined rate ranges from approximately 11.9% in Zug to around 20–21% in Geneva. Most cantons hover between 12% and 17%. For a full breakdown, see our cantonal tax comparison.

What is the VAT registration threshold in Switzerland?

A Swiss company must register for VAT (MWST) when its worldwide taxable turnover exceeds CHF 100,000 per year (Art. 10 para. 1 MWSTG). Voluntary registration is possible below this threshold, which allows the company to reclaim input tax on its expenses. Companies providing only VAT-exempt services (e.g. certain financial services, medical services) are not required to register regardless of turnover.

Are there different VAT rates in Switzerland?

Yes. Switzerland has three VAT rates: the standard rate of 8.1% applies to most goods and services. A reduced rate of 2.6% applies to basic necessities including food, non-alcoholic drinks, books, newspapers, and medicines. A special rate of 3.8% applies to accommodation services (hotels, short-term lets). These rates have been in place since 1 January 2024 following a voter-approved AHV reform.

What is withholding tax in Switzerland and does it affect my company?

Swiss withholding tax (Verrechnungssteuer) is levied at 35% on dividends paid by Swiss companies and on certain interest payments (Art. 4 VStG). For shareholders resident in Switzerland, the withholding tax is fully refundable via their personal or corporate tax return. For foreign shareholders, the rate may be reduced under a double tax treaty — Switzerland has over 100 DTTs in force. The net withholding tax after treaty reduction varies from 0% to 35% depending on the treaty country and the shareholding percentage. This is a critical consideration for foreign-owned Swiss holding structures.

What are the transfer pricing rules for Swiss companies?

Switzerland does not have a specific transfer pricing statute, but the arm’s length principle applies through the general prohibition on hidden profit distributions (verdeckte Gewinnausschüttungen) under Art. 58 DBG and via the ESTV’s administrative practice. The Swiss tax authority benchmarks intercompany transactions — including management fees, royalties, loans, and service agreements — against market prices. If a Swiss company pays above-market prices to a related party, the excess is treated as a non-deductible hidden distribution and may attract withholding tax. Swiss companies in international groups are expected to maintain transfer pricing documentation aligned with OECD guidelines, particularly where transactions exceed CHF 1–2M annually.

Can a Swiss company carry forward tax losses?

Yes. Under Art. 67 DBG, Swiss companies can carry forward tax losses for up to seven years. There is no carry-back of losses to prior years. Losses may only be deducted in the order in which they arose (oldest losses first). Loss carry-forwards are taken into account before applying the participation exemption or other deductions. Cantonal rules broadly mirror the federal position, though a few cantons have historically applied stricter limits.

What accounting standard applies to Swiss companies — IFRS or Swiss GAAP?

Most Swiss SMEs prepare their statutory accounts under the Swiss Code of Obligations (CO) accounting rules, which are the default standard for all Swiss legal entities. These are relatively flexible — they allow significant hidden reserves and do not require fair value accounting or full deferred tax recognition. Swiss GAAP FER is an optional, more structured standard used mainly by non-listed companies that want recognised accounting principles without the full burden of IFRS. IFRS is required for companies listed on the SIX Swiss Exchange and optional for others. For statutory purposes, foreign subsidiaries operating in Switzerland must still file CO-compliant accounts regardless of what standard the parent uses.

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Sources: Swiss Code of Obligations (OR/CO), Art. 620–964; Federal Act on Direct Federal Tax (DBG); Federal Act on Withholding Tax (VStG); Federal Act on VAT (MWSTG). Full texts at fedlex.admin.ch. ESTV guidance at estv.admin.ch. Swiss confederation general information at admin.ch.