Accounting Services Switzerland: Tax & Audit Guide

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.

Five Accounting Mistakes That Cost Swiss Companies Money

Based on Goldblum und Partner AG’s experience managing accounts for 300+ Swiss companies, these are the errors that generate the most unnecessary expense:

1. Treating dormant as obligation-free. A dormant GmbH registered in the Commercial Register still requires annual financial statements and a corporate tax return. Annual cost to maintain properly: CHF 1’400. Cost of catching up after three skipped years: CHF 8’000-12’000 in reconstruction fees, plus tax interest at 3% per annum.

2. Missing the VAT registration trigger. The CHF 100’000 threshold applies to worldwide taxable turnover — not just Swiss revenue. A company billing EUR 70’000 to German clients and CHF 40’000 to one Swiss client is already over the line. Retroactive registration means owing VAT on all past taxable supplies, plus ESTV interest.

3. No company bank account. Without a dedicated Swiss bank account, regulators question the company’s operational independence. Banks require current annual accounts to open accounts — creating a deadlock that can only be broken by bringing the books up to date first.

4. Intercompany pricing without documentation. Management fees and intragroup loans priced outside market rates are reclassified as hidden profit distributions. The consequence: 35% withholding tax on the reclassified amount, with no refund available if the structure fails the safe harbour test.

5. Accumulating an accounting backlog. Each unfiled year makes the next harder. The opening balance for 2025 depends on the closing balance of 2024 — skip a year and the reconstruction cost compounds. Standard hourly rates for catch-up work: CHF 150/hour (routine) to CHF 180/hour (complex).

From practice: A dormant holding company’s founder assumed zero-turnover meant zero filings. The cantonal tax office disagreed — CHF 2’000 in penalties plus CHF 1’200 in accrued interest. Total bill: CHF 7’400. Annual maintenance would have cost CHF 1’400 per year.

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.

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.

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.

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.

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 Thresholds at a Glance

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.

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.

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.

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. Pricing ranges from CHF 35 to CHF 83 per month depending on the plan (Starter, Standard, Professional). 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.

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.

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.

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.

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:

Dormant company (zero turnover, no transactions):

• Annual statements + tax filing: approximately CHF 1’400 per year. This is the irreducible minimum for maintaining a Swiss company in good standing.

Small Swiss company (GmbH or AG, 0–2 employees, up to ~CHF 2M turnover, up to ~100 bank transactions/year):

• Fixed package up to 100 transactions: approximately CHF 3’800 per year (overage billed hourly)
• Monthly bookkeeping + quarterly VAT + annual accounts + tax return: CHF 3’000–6,000 per year for more active companies

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

Standard hourly rates for Swiss accounting firms: CHF 150/hour for routine bookkeeping work, CHF 180/hour for complex matters (multi-currency, intercompany, restructuring). These rates exclude VAT. All fees are quoted in Swiss francs and are subject to VAT at the standard rate of 8.1%.

One point that surprises many founders: most Swiss fiduciaries do not offer fixed annual packages for startups. Transaction volumes are too unpredictable in the first one to two years, so hourly billing is the norm until the business stabilises and a meaningful annual estimate can be made.

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.

In Zug, where the company was registered, corporate tax runs at approximately 11.85% — among the lowest in Switzerland. But no tax rate helps if you have not filed. 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.

In-House vs Outsourced: The Real Cost Breakdown

Break-even point: roughly 500-800 transactions per year. Below that, outsourcing is cheaper. Above that, in-house starts making sense — provided you can find and retain qualified Swiss accounting staff in a market with 2% unemployment.

What outsourcing includes that in-house does not: year-end accounts preparation, tax return filing, VAT returns, and all correspondence with the cantonal tax authority. An in-house bookkeeper records transactions; the compliance layer still requires either a qualified accountant or a fiduciary.

The Friction Points Foreign Founders Miss

The VAT Threshold Trap

The CHF 100’000 registration threshold captures worldwide taxable turnover, not just Swiss revenue. A UK consultancy billing GBP 70’000 to London clients and CHF 40’000 to one Swiss client already exceeds the threshold. Registration must happen before the threshold is crossed — not after.

Filing Deadlines That Compound

Corporate tax returns are due within six months of financial year-end. Extensions are routinely granted with professional representation. But missing the deadline without an extension triggers an estimated assessment — almost always unfavourable — plus interest from the original due date.

The Bank Account Requirement

A Swiss company without its own bank account is viewed with suspicion. Banks require current annual accounts to open or maintain accounts. Without a bank account, the company cannot demonstrate operational independence — which feeds into cantonal tax authority assessments of substance and residency.

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

Frequently Asked Questions

“We have a dormant company — do we really need to pay for accounting?”

Yes. Art. 957 OR does not exempt dormant companies. A company registered in the Commercial Register must prepare annual financial statements and file a corporate tax return every year, even with zero revenue. The minimum cost is approximately CHF 1’400/year. Skip it, and the cantonal authority issues estimated assessments with 3% annual interest. The company cannot be liquidated until every open year is filed and settled.

“Can we do the bookkeeping ourselves?”

Swiss law does not require a fiduciary. But self-prepared books almost always require significant correction before a tax return can be filed. The cost of reviewing and correcting DIY bookkeeping frequently exceeds the cost of professional maintenance. If you do handle it yourself, use Bexio (CHF 35-83/month) and ensure VAT coding is correct.

“How much does outsourced accounting actually cost?”

Dormant company: CHF 1’400/year. Dormant company in formation package: from CHF 1’800/year. Active company up to 100 transactions: CHF 3’800/year. Standard hourly rate: CHF 150/hour. Complex work: CHF 180/hour. All rates exclude VAT at 8.1%.

“What happens if we ignore the accounting obligations?”

The cantonal tax authority issues estimated assessments — typically 200-400% above actual liability — with interest at approximately 3% per annum. The company cannot be liquidated, cannot obtain bank financing, and cannot demonstrate substance. Directors face personal liability under Art. 725 OR.

“We crossed CHF 100’000 revenue but did not register for VAT — what now?”

Register immediately. The ESTV can impose retroactive VAT liability from the date the threshold was exceeded. Voluntary late registration is treated more favourably than discovery during an audit.

“Our company has no Swiss bank account. Is that a problem?”

Significant problem. Without a dedicated company bank account, cantonal tax authorities may question substance and residency. Banks require current annual accounts to open accounts. If payments route through a personal account or foreign parent, regulators view operations as questionable.

“What is the corporate income tax rate in Switzerland?”

The effective combined rate varies by canton: approximately 11.85% in Zug, 14% in Geneva, 13% in Basel-Stadt, up to approximately 20% in Zurich. The federal component is a flat 8.5% on profit after tax.

“What is withholding tax and does it affect my company?”

Swiss withholding tax (Verrechnungssteuer) is 35% on dividends and certain interest payments. For Swiss-resident shareholders, it is fully refundable. For foreign shareholders, the rate may be reduced under a double tax treaty. This is critical for foreign-owned holding structures.

“Can Swiss companies carry forward tax losses?”

Yes. Under Art. 67 DBG, losses can be carried forward for up to seven years. There is no carry-back. Losses are deducted in the order they arose (oldest first).

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.