Direct Taxes (e.g., income and wealth/capital taxes):

For direct taxes, Individuals are automatically registered upon establishing residency, while legal entities are registered upon entry into the commercial register. There is no separate requirement for registration. However, in cases where an individual or a company is subject to unlimited tax liability in Switzerland but does not have residency or a commercial register entry, they must initiate registration.

Withholding Tax:

Withholding tax does not require a formal registration.

Indirect Taxes (e.g., VAT, stamp duty)

Value Added Tax (VAT):

For indirect taxes, companies in Switzerland are required to register for VAT under several circumstances..

The process of VAT registration is independent of corporate income tax registration and requires businesses to file an application with the SFTA. Swiss companies commencing business activities or expanding  through an acquisition or a new line of business, are required to register for VAT if their worldwide turnover is expected to reach CHF 100,000 within one year. The CHF 250,000 threshold applies exclusively to non-profit-making, voluntarily managed sports or cultural associations and charitable institutions — not to non-profit-making organisations generally. Swiss companies that were previously exempt from VAT must register once their turnover exceeds the CHF 100,000 threshold at the end of the relevant financial year.

Foreign companies providing services in Switzerland are likewise subject to VAT registration if their worldwide turnover expect to meet the CHF 100,000 turnover threshold. Those already operating in Switzerland must register at the end of the financial year in which this threshold is first reached.

Foreign companies that do not perform services in Switzerland are not subject to Swiss VAT. However, domestic branches of foreign companies are liable for VAT registration if they meet the turnover requirement of CHF 100,000.

Voluntary VAT registration is available for companies that do not meet the CHF 100,000 threshold but wish to benefit from input tax refunds. This option is particularly useful for start-ups with high expenses and low turnover.

As of 1 January 2025, Switzerland introduced a platform taxation regime: operators of electronic platforms facilitating the sale of goods who generate annual turnover of at least CHF 100,000 from such facilitated sales are deemed to be the supplier vis-à-vis the buyer for VAT purposes. This may trigger a separate VAT registration obligation for platform operators not previously subject to Swiss VAT.

Stamp Duty — Securities Transfer Tax:

The securities transfer tax requires dealers in taxable securities to register with the SFTA and to file periodic returns on a self-assessment basis. For other stamp duties, no prior registration is required.

As a preliminary point, it is important to note that Switzerland operates a federal system in which direct taxes are assessed at the cantonal level by the cantonal tax authorities, while the Swiss Federal Tax Administration (SFTA) is responsible for federal-level indirect taxes and the federal withholding tax. This distinction is fundamental to understanding the Swiss tax assessment system.

In Switzerland, the assessment system varies depending on the type of tax involved:

Direct Taxes (e.g., income and wealth/capital taxes) and the Federal Withholding Tax:

In Switzerland, the assessment process for direct taxes, such as income tax and wealth/capital tax, consists of several steps, beginning with the submission of a tax return by the taxpayer. Taxpayers are required to complete and submit their return truthfully and Iin full to the relevant cantonal tax authority by the applicable deadline. An extension may be requested if required, but failure to submit the tax return on time – even after receiving a reminder – will ultimately lead to an ex officio assessment by the tax authority.

Once submitted, the tax authority reviews the return, determines the relevant tax factors and calculates the tax due based on the applicable rates. Where necessary, the tax authority may request additional documents to support the review of the tax return. For companies, initial assessments may be provisional, with final assessments issued following an audit or once the tax base has been determined by the authorities. This procedure ensures that taxpayers meet their obligations while providing mechanisms for correction and the accurate determination of tax liabilities.

Regarding withholding tax, the liable party, typically the company making the payment, deducts the tax at source and remits it directly to the SFTA. As an alternative to the standard deduction and remittance procedure, withholding tax may be settled by way of notification rather than payment. In an international context, this option requires prior approval by the SFTA, which is valid for five years and must be renewed thereafter.

Indirect Taxes (e.g., VAT, stamp duty):

Indirect taxes, such as VAT and stamp duty, operate under a self-assessment principle. Taxpayers calculate and declare their own tax liabilities and remit the amounts due directly to the Swiss Federal Tax Administration (SFTA), without prior review by the tax authority. The taxpayer’s own assessment stands unless the SFTA intervenes following an audit, resulting in a formal decision where required.

Regarding stamp duty, the most common taxable events include the issuance of securities (issuance stamp), the transfer of securities (transfer stamp) and the conclusion of insurance contracts (insurance stamp).

Direct Taxes (e.g., income and wealth/capital taxes):

Taxpayers can generally amend their tax return as long as it has not been definitively assessed by the tax authority. There is typically no fixed statutory time limit for amendments before the final assessment.

The commercial balance sheet (balance sheet and profit and loss account) is the starting point and basis for determining the taxable profit of legal entities. Where incorrect values have been disclosed in a filed tax return, a balance sheet amendment or balance sheet corrections may be possible. In the case of balance sheet corrections, incorrect valuations (contrary to commercial law) are replaced by correct ones. Such corrections are permissible at any time prior to a legally binding assessment. Balance sheet corrections by the tax authority are only possible in post-assessment proceedings. Where the balance sheet is amended, incorrect balance sheet values are replaced by other, equally correct values.

Withholding Tax (WHT):

Withholding tax declarations may be amended prior to any formal intervention by the SFTA. Where an error is identified after submission, the liable party should file a corrective declaration with the SFTA as soon as possible. Voluntary correction prior to SFTA intervention is treated more favourably and may avoid or reduce penalties. There is no fixed statutory deadline for amendments, but corrections made after the SFTA has initiated an audit or proceedings will be subject to formal assessment. Where withholding tax is settled by payment, default interest accrues automatically upon late payment, without prior notice. Where withholding tax is settled by way of notification procedure, late filing may result in a fine rather than default interest.

VAT:

The deadline for the final submission of the correct VAT declaration for a financial year is 240 days after the end of the financial year in question, of which 180 days are the regular deadline, and a further 60 days available upon request. Within this period, the taxpayer is obliged to make a final decision on whether or not to make use of the option for certain transactions and to ensure that all formal requirements are met. Any additional tax identified as a result of a corrective return is subject to default interest from the original due date, irrespective of when the correction is made.

Stamp Duty:

Stamp duty declarations may likewise be amended prior to any formal intervention by the SFTA. Where an incorrect or incomplete declaration has been submitted, a corrective declaration should be filed promptly. As with withholding tax, voluntary correction prior to any SFTA intervention is treated more favourably. No fixed statutory deadline applies, but amendments made after the initiation of audit proceedings will be subject to formal assessment by the SFTA. In all cases, default interest accrues from the original due date without prior notice and remains due regardless of when the correction is filed.

From a Swiss perspective, the tax authority has several methods to challenge the amount of tax declared or paid by a taxpayer through initial assessment or self-assessment:

Tax Assessment Procedure: The tax authority conducts an initial assessment based on the taxpayer’s submitted tax return or self-assessment. This assessment involves reviewing the income, deductions and other relevant factors reported by the taxpayer. As part of the assessment procedure, provisional assessments are issued as a first stepto secure the tax and establish the tax authority’s potential tax claim. The provisional assessment will generally differ from the definitive assessment, as the tax authority works with data from previous years to determine the provisional tax burden.

Verification and Audit: The tax authority may conduct a verification or audit to ensure the accuracy and completeness of the tax return. This process involves examining supporting documents, such as bank statements, invoices and contracts, to verify the declared income and deductions.

Information Requests: The tax authority can request additional information or clarification from the taxpayer regarding specific values in the tax return. This may include inquiries relating to sources of income, expenses claimed or other relevant financial transactions. In addition, the taxpayer may be informed during the procedure that certain facts will be assessed to their disadvantage if the required information is not provided or proven. The duty to provide information arises from the duty to cooperate in the assessment procedure.

Adjustments and Corrections: Where discrepancies or errors are identified during the assessment or audit, the tax authority may propose adjustments to the declared income or deductions. Such adjustments aim to correct any inaccuracies and ensure compliance with tax laws.

Penalties and Interest: Where errors or omissions result in the underpayment of taxes, the tax authority may impose penalties and interest charges. These penalties are intended to deter non-compliance and ensure the recovery of the correct amount of tax due.

Overall, the Swiss tax authority employs a structured assessment process, including verification, information requests, and adjustments, to verify the accuracy of tax payments made by taxpayers, whether through initial assessment or self-assessment regime. This ensures that tax liabilities are correctly determined and properly enforced in accordance with Swiss tax laws.

Public law claims of the state against citizens in Switzerland are subject to statutory limitations, which are considered ex officio. In tax law, there are two key limitation periods:

The limitation period for assessment determines how long taxes can be assessed after the tax period ends. It consists of a relative period of 5 years, which can generally be extended up to 15 years in cases of interruption or suspension. For VAT, however, there is an absolute limitation period of 10 years.

The limitation period for collection, on the other hand, governs how long taxes can be claimed after the assessment becomes final. It includes a relative period of 5 years and an absolute period of 10 years from the end of the tax year in which the tax was definitively assessed.

Enforcement actions resulting in a certificate of loss can extend the collection period to 20 years from the date of the certificate, with interruptions being allowed until the end of this period.

Interruptions of the statutory limitation period occur upon any official action aimed at establishing or asserting the tax claim, an explicit acknowledgment of the claim by the taxpayer or a jointly liable party, or the initiation of proceedings for tax fraud or criminal prosecution in connection with tax offenses.

Regarding legal consequences, tax assessments made beyond the limitation period are contestable but not void. They remain legally binding unless challenged by the taxpayer.

Swiss criminal law divides offenses into three categories based on the sanctions imposed:

• Contraventions: Offences punishable by a fine.
• Misdemeanors: Offences punishable by a custodial sentence of up to three years or by a monetary penalty.
• Felonies: Offences punishable by a custodial sentence of more than three years.

For direct tax offenses, there are only two categories: Contraventions and misdemeanors.

• Contraventions: These include procedural violations and tax evasion. The least serious breach of tax obligations is the failure to fulfill procedural duties, such as failing to submit the tax return. This is punished with a fine. Tax fraud, a more serious offense, involves any action or omission that leads to an insufficient assessment or non-assessment of the actual tax base (income, wealth). This is also punished with a fine. Penalties in this respect are determined in such cases by the same court that decides in tax matters.
• Misdemeanors: These include tax fraud and the misappropriation of withholding tax. Tax fraud occurs when an individual, with the intent to evade taxes, submits falsified, forged, or materially false documents. For withholding tax, a web of deliberate false statements suffices, without the need for forged documents. Penalties in this respect are determined in such cases by the criminal court.

Contraventions are investigated and adjudicated by the tax authorities themselves, whereas misdemeanours are prosecuted by the ordinary criminal prosecution authorities and adjudicated by the criminal courts (see question 6).

In addition to the criminal proceedings, the tax authorities may assess and collect any tax that has been evaded, together with interest, in separate supplementary tax proceedings.

It should be noted that the threshold for tax fraud differs between direct and indirect taxes. In the case of direct taxes, tax fraud requires the use of forged, falsified or materially false documents. By contrast, in the case of withholding tax, VAT and stamp duties, the concept is broader: fraudulent conduct may also consist of elaborate deceptive schemes or a web of false statements, without the need for a forged document.

The SFTA, Swiss Tax Conference (STC), EXPERTsuisse, and the IFF-HSG have collaborated to outline the principles and guidelines in the “Tax Code of Conduct 2021”. This document aims to ensure effective adherence to legal obligations and foster enduring trust between taxpayers, tax professionals, and tax authority. It serves as a recommendation for the tax administrations, tax professionals, and representatives of businesses engaged in tax-related activities. Additionally, the SFTA issues circulars directed at cantonal tax authority, trustees, and individuals and entities. These circulars provide detailed guidance on specific aspects of federal direct tax, withholding tax, and stamp duty.

In the present context, it should be noted that all government action requires a legal basis, which embodies the principle of legality of administration. Furthermore, the action must be in accordance with the public interest, reflecting the principle of the general good and the principle of proportionality. In addition, it must be ensured that state action upholds legal equality, which is the principle of legal equality, and does not violate the requirements of good faith, which is the principle of good faith.

• The principle of legality means that all administrative acts must have a sound legal basis; administrative acts that are not based on a legal norm are inadmissible.
• It should also be emphasised that all government action must serve the public interest. The State must both protect and actively promote the public interest.
• With regard to the principle of proportionality, it should be noted that the administrative measures taken, must be both appropriate and necessary to achieve a public interest objective. In addition, the objective pursued must be proportionate to the burdens imposed.
• The principle of equality before the law has two essential aspects: firstly, the right to equal treatment and, secondly, the prohibition of arbitrary action.
• The principle of good faith is expressed in administrative law in two main ways:
  • Protection of legitimate expectations: in the context of the protection of legitimate expectations, citizens are entitled to rely on official assurances and on the actions of the authorities that give rise to legitimate expectations .
  • Prohibition of inconsistent behaviour and abuse of rights: The principle of good faith prohibits both public authorities and private individuals from acting inconsistently or abusing the law. In particular, public authorities are prohibited from changing their position on a matter without objective justification.

Rulings, i.e. requests to the tax authority for a binding legal assessment of a specific matter, are the result of the protection of good faith and grant protection of the status quo, provided that the facts of the case have been presented specifically, correctly and completely. The information has been provided by the competent authority or that authority have been deemed competent in good faith.

The tax authority in Switzerland possesses the authority to compel the production of information from the taxpayer, including the ability to request emails and other relevant documents. Taxpayers are obligated to cooperate with these requests, providing the necessary information to assist in tax assessments.

In cases involving suspected tax offenses, such as tax fraud, the investigating authorities may take additional measures, including conducting house searches and accessing emails. These actions are conducted under specific legal provisions and procedural safeguards to ensure fairness and adherence to the rule of law.

In Switzerland, the extent to which tax authorities may compel third parties to provide information depends on the tax concerned.

For direct taxes, third parties are not subject to a general obligation to disclose information to the tax authorities. Their obligations are specifically defined by law and are generally limited to particular categories of information and persons. In some cases, the taxpayer must first be requested to obtain the relevant information before the tax authority may approach the third party directly. Certain third parties are, however, subject to direct information or reporting obligations. Public authorities are also subject to separate administrative assistance obligations.

The position is broader for certain indirect taxes. In particular, for VAT purposes, the tax authority may require third parties that have entered into transactions with a taxable person to provide information relevant to determining their tax liability and, in certain circumstances, to make relevant business records and documentation available. Specific third-party information obligations also apply in relation to withholding tax and stamp duties.

These powers are subject to statutory limits, including legally protected professional secrecy. A third party that disputes an obligation to provide information has access to judicial protection under the applicable procedural rules. The precise procedure depends on the tax concerned and the nature of the request, and not every informal request is necessarily independently appealable. Where the tax authority seeks formally to compel disclosure or to impose sanctions for non-compliance, the legality and scope of the information request may be subject to judicial review.

Bank client confidentiality remains relevant in ordinary domestic direct-tax proceedings. Although banks must provide certain information and documentation to their customers, the tax authorities cannot generally circumvent bank client confidentiality by obtaining protected customer information directly from the bank. This does not relieve the taxpayer of its own obligation to obtain and produce relevant banking information. Different rules may apply in tax investigations and other proceedings in which the authorities have broader statutory powers to obtain information.

Swiss tax law does not allow for formal settlement agreements to resolve tax disputes. If a taxpayer disagrees with the findings of a tax audit, the appropriate course of action is to follow the formal appeal process. This process may eventually involve litigation if the issue cannot be resolved during the earlier appeal stages.

However, the tax authority is usually open to discussing an amicable solution in complex cases.

Rulings can be used as a preventive measure (see question 8). It is important to ensure that the legal assessment set out in the ruling can be substantiated, i.e. that it is based on one of the possible interpretations of the law. In addition, an amicable solution may be reached with the tax authorities if the facts of the case are in a state of flux and there is a possible restructuring (particularly in the case of companies).

The taxpayer can directly communicate their concerns to the tax authority conducting the audit. Often, clear communication can help address misunderstandings or procedural delays.

The taxpayer can file an administrative complaint if they believe they are being treated unfairly or if there are unreasonable delays.

For the code of conduct with tax authorities, see question 8.

In addition, taxpayers have a constitutional right to have proceedings dealt with within a reasonable time. Where a tax authority unlawfully fails to act or delays proceedings beyond what is reasonable in the circumstances, the taxpayer may seek relief for denial of justice or undue delay. The appropriate remedy and the competent review body depend on the tax concerned and on whether the proceedings are conducted by a federal or cantonal authority, but Swiss procedural law generally provides a mechanism to challenge unjustified inaction or excessive delay.

The tax procedure in Switzerland typically starts with the competent tax authority informing the taxpayer of their decision (e.g. tax assessment). Within 30 days of receiving this notice, the taxpayer may file a formal complaint with the tax authority. The tax authority is required to re-examine and, if necessary, modify the initial decision partially or in full, or reject the complaint entirely. It should be noted, that in general the same tax commissioners may be involved in the subsequent re-examination of the case, or a different department may handle it. In some cantons the taxpayer will be notified by the tax administration if the administration intends to deviate from the tax return. In these cases, the taxpayer may submit a statement before the final decision is taken.

If the taxpayer is dissatisfied with the outcome of the re-examination, an appeal may be lodged with the court.

For direct taxes (see question 13), if a taxpayer disagrees with the final tax assessment from the Canton (competent authority in direct tax matters), they must first initiate an administrative proceeding before being able to take their case to a court (appeal).. On the cantonal level , appeals are usually handled by a first and a second judicial instance. These are the cantonal appeal commission (first instance), followed by a final cantonal instance, usually a cantonal judicial administrative court. Direct appeals to these courts are generally not permitted. An exception is possible when the tax authority’s position has already been determined and the tax authority indicates that it does not wish to deviate from its predetermined decision, making the procedure a mere formality.

VAT can be used as an example to determine the right of appeal. The SFTA conducts audits that involve a comprehensive review of financial records and related documentation, often followed by discussions of the findings between the entity’s representative and the auditor of the SFTA. The company will subsequently receive a final assessment from the SFTA (usually within five business days; in complex cases, up to one year). Rectifications of any discrepancies typically may only be addressed through an objection. It is crucial to understand that any objections against this determination must normally be submitted within a period of 30 days to the SFTA. In the event of an appeal, taxpayers pay the tax owed under appeal in order to avoid negative interest charges. Additionally, following an objection, an appeal may be made to the Federal Administrative Court, which serves as the court of first instance (see also question 13).

Administrative proceedings and court proceedings regarding the different types of taxes are typically conducted in writing, without oral hearings or the presentation of evidence such as witness statements. In criminal tax proceedings, however, the accused is entitled to an oral hearing. In this case, hearings may be held in public at cantonal level (e.g. Canton of Zurich).

For direct taxes, assessments and proceedings before the tax authority may involve personal meetings but are generally neither held in public nor published. Court proceedings (first and second instance; see question 15) are also conducted in writing and, depending on the canton, are published or sometimes made available online (e.g. in Zurich from 2011 for the appeals commission and in Berne depending on the instance). The decisions are anonymised, but the parties to the dispute may be listed for a limited period of time in a physical list. Proceedings before the Federal Supreme Court are generally similar, with the rare possibility of public hearings in exceptional cases. The parties to federal court judgments are made public through listing for a certain period of time as well.

For indirect taxes, assessments and proceedings are also not public and generally do not involve oral hearings, although personal meetings may occur during assessment and objection proceedings before the SFTA. Proceedings at the Federal Administrative Court are conducted in writing and are published anonymously.

See question 15.

A distinction needs to be made between criminal tax law and the regulations regarding the audit of legal entities and individuals

In the area of criminal tax law, there are two conceivable cases in which the discovery of relevant documents can be of decisive importance for the presentation of evidence and for criminal investigations. A distinction must be made between the jurisdiction of the cantonal and federal authorities and between the types of tax. The first case concerns tax fraud offenses for which the tax authority refers the case to the cantonal prosecution authority. In these cases, the prosecutor can use enforcement measures, such as discovery processes, to obtain documents that can be used as evidence. The second situation concerns tax fraud offences i.e. when the criminal matters and investigations division of the SFTA becomes involved. The head of the Federal Department of Finance authorises the SFTA to conduct enforcement measures.

In the area of non-criminal tax law, the tax authorities are empowered to conduct on-site audits (e.g., regarding VAT declarations). In this context, taxpayers are obligated to provide the necessary information and documentation. Audits serve as an important tool for the tax authorities to clarify the relevant facts according to their broad investigative powers, which require taxpayers to collaborate. The principle of collaboration is therefore of the utmost importance. Refusing to provide requested information is unproductive, but it is important to have a clear understanding of what information must be disclosed, and what can remain confidential.

In general, witness statements are only used to clarify facts if no other evidence is available. Please note that in criminal tax proceedings, witness statements may play a different role than in other tax proceedings but are also uncommon.

The taxpayer generally has the burden of proof for facts that reduce or cancel their tax liability. On the other hand, the tax authority has the burden of proof for facts that justify an increasein tax liability.

If the assessment authority does not agree with the taxpayer’s position, the taxpayer may be given the opportunity to provide additional evidence during an audit. In this case, the taxpayer is required to provide necessary documents and information (see questions 4 and 11). If the taxpayer does not comply with this obligation, this may be interpreted to his disadvantage, which may ultimately lead to a reversal of the burden of proof. Both the principle of investigation and the taxpayer’s duty to cooperate therefore apply. In any subsequent appeal proceedings, it is up to the taxpayer to provide the necessary evidence or to convince the judge that the conclusion is incorrect based on of the available documents.

There is no reversal of the burden of proof in criminal tax proceedings, i.e., the prosecutor must prove the offence. The principle of the taxpayer is not obliged to collaborate and may even refuse to testify (“nemo tenetur”, i.e. the right not to incriminate oneself). These rights are further underpinned by the presumption of innocence, which applies in criminal tax proceedings and requires the prosecution to establish guilt beyond reasonable doubt. In criminal tax proceedings initiated by an indictment or a complaint, the judge must examine whether the prosecution or the tax authority has provided evidence of a criminal offence, whereby the principle of investigation also applies.

The timing of an appeal will vary depending on the complexity of the issues and is influenced by several factors. In general, simple matters such as filing tax returns or minor factual corrections can be resolved within a few weeks. However, more complex cases, raising substantive legal issues, can take several months or even years. This depends on various factors such as the complexity of the case, the number of instances involved, the availability of information and documents, and the workload of the tax authority or the court. Nevertheless, the authority must adhere to the prohibition of undue delay, which is a fundamental principle of Swiss procedural law. This principle helps prevent unnecessary delays and ensures that cases are resolved in a timely manner.

The taxpayers is generally required to pay any assessed additional tax, whether for direct or indirect taxes, even if he chooses to contest the assessment. This means that the obligation to pay the assessed taxes is neither suspended nor cancelled by lodging an appeal. However, in general, enforcement cannot take place before the assessment becomes legally binding, although late payment interest may accrue in the meantime. Nevertheless, by paying the tax under reservation of a refund, negative interest consequences can be avoided It should be noted that an appeal can be lodged regardless of payment.

Swiss law does not impose a general requirement to be represented by a registered attorney in tax appeal proceedings. Taxpayers may therefore be represented by other qualified persons, such as fiduciaries, tax advisers, or other authorized representatives, without holding a bar admission. However, distinctions apply depending on the type of proceeding.

In ordinary tax proceedings, representation is generally unrestricted as to professional qualification. Taxpayers may act themselves or appoint any authorized representative, including fiduciaries or tax consultants. This applies equally before cantonal tax authorities and cantonal courts. Notably, even before the Federal Supreme Court, there is no lawyers’ monopoly in tax matters, unlike in civil or criminal proceedings.

At cantonal level, the rules may vary. Certain cantons provide for a lawyers’ monopoly before their highest cantonal court, which may affect who may represent a taxpayer in the final cantonal instance before the matter is referred to the Federal Supreme Court.

In criminal tax proceedings, a further distinction must be drawn. Where the proceedings are conducted by the tax authorities (see questions 6 and 7), no lawyers’ monopoly applies unless cantonal law provides otherwise, and fiduciaries or tax advisers may therefore represent the taxpayer. Where the proceedings are conducted by the criminal prosecution authorities (see questions 6 and 7), the Swiss Code of Criminal Procedure and the lawyers’ monopoly apply. In that case, only registered attorneys admitted to the bar may act as defence counsel.

In proceedings conducted by the Federal Tax Administration’s Criminal Investigation Unit (ASU), which investigates serious tax offences (direct taxes, withholding tax and stamps), the lawyers’ monopoly equally applies, as these proceedings are governed by the Swiss Code of Criminal Procedure.

A distinction must be made between procedural costs and party costs. Procedural costs are generally not charged in assessment and objection proceedings, and no party cost are awarded in these proceedings. The procedural costs in administrative appeal proceedings consist of the court fee, the costs of notification and, where applicable, cash expenses (e.g., expert costs). The court fee is generally based on the amount in dispute. In cases where the amount in dispute cannot be determined, and in criminal tax cases, the court fee is estimated or set within a certain range. With regard to court fees, it should be noted that, despite the competences described above, in the area of direct taxes, i.e. federal income and profit tax on the one hand, and cantonal and municipal income and profit tax on the other, two separate proceedings may be consolidated into a single judgment. A separate court fee may therefore be charged for each appeal.

The award of reasonable party costs (which need not cover the full costs incurred) will only be considered if the appellant has been substantially successful or has only narrowly failed and the complexity of the factual and legal issues justified legal representation.

As a rule, the losing appellant must pay the fees. If the objection or appeal is partially granted, the costs will be shared proportionally. Even a successful appellant will be ordered to pay all or part of the costs if they would have prevailed in the proceedings before the tax authorities if they had acted in accordance with their obligations, or if they have deliberately made the investigation in the proceedings before the court more difficult.

In Swiss tax law, there are no alternative forms of dispute resolution for domestic tax disputes between authorities and taxpayers. The closest procedure is the mutual agreement process (MAP) under double taxation treaties, it takes place between states and does not directly involve the taxpayer. The MAP aims to resolve or prevent double taxation.

Yes, as explained in question 15, depending on the type of tax, there are one or two further instances of appeal up to the Federal Supreme Court. Both the tax assessment authorities and the appeal instances have full power of review, on questions of law and of fact. In principle, the Federal Supreme Court does not re-examine the facts. It may only challenge the facts if the lower court has established them in a manifestly erroneous manner or on the basis of a violation of the law.

A distinction must be made between ordinary and criminal tax proceedings, and within criminal tax proceedings, further distinctions apply depending on the type of tax. In ordinary proceedings, no additional penalties are imposed. At most, interest on arrears may be charged, or, in the case of withholding tax, the reimbursement of withholding tax may be refused.

In the area of direct taxes (income, wealth, profit, and capital taxes), a fine of up to three times the amount of the tax or a prison sentence of up to three years may be imposed. In addition, the right to a withholding tax refund may be forfeited. For VAT purposes, the minimum penalty is CHF 20,000 (for negligent false declaration without reference to ambiguities) up to CHF 800,000 (e.g., tax fraud in connection with import VAT) or imprisonment for up to two years. Where the provisions on tax fraud (imprisonment for up to three years or a fine) do not apply, fraud of stamp duty or withholding tax is punishable by a fine of up to CHF 30,000 or whichever is higher, up to three times the amount of the evaded duty or the unlawful advantage.

There is no formal mitigation mechanism for penalties as such. The mitigation of penalties is confined to the realm of criminal tax law. The degree of culpability plays a crucial role in determining the penalty. Generally, in cases of negligence, the penalty imposed will be lower than that for intentional misconduct. Furthermore, a voluntary disclosure may be submitted to avoid a fine. However, for this disclosure to be valid, it must be complete and truthful, meaning all relevant information must be disclosed.. It is imperative that the voluntary disclosure occurs before the tax authorities become aware of any irregularities and must not be prompted by external pressure or coercion . Additionally, the disclosure must effectively remedy the tax shortfall. The taxpayer must also be prepared to pay both the tax arrears and any associated interest.

The tax authorities will be increasingly critical with regard to the corporate tax residence of legal entities. The Federal Supreme Court has materially clarified this framework through three recent landmark decisions. In BGE 151 II 466 issued on February 26, 2025, the Court confirmed that a company with its registered seat in a low-tax canton but whose sole director conducted all business from his home address in another canton had established a mere letterbox domicile, requiring the seat canton to set aside assessments for multiple open years. Critically, the Court clarified that the director’s place of residence does not in itself constitute a connecting factor for tax liability. If the geographical focus of management cannot be established with predominant likelihood, the seat canton retains jurisdiction by default. This principle was reinforced in 9C_547/2023 issued on April 8, 2025, where the Court held that any canton claiming the place of effective management must bear the full burden of proof. Most recently, 9C_652/2025 issued on June 9, 2026, addressed the procedural dimension. Challenges to assessments of multiple cantons in intercantonal double taxation proceedings must be specifically and explicitly formulated, as implied or imprecise challenges are inadmissible and may result in the company being taxed in two cantons simultaneously, even where the taxpayer succeeds on the merits.

Transfer pricing remains a major area of heightened scrutiny. Switzerland has no codified transfer pricing law and the arm’s length principle is applied through the SFTA’s practice and case law, with the OECD Transfer Pricing Guidelines serving as the primary albeit non-binding interpretative tool. Audits have become more structured and data-driven, targeting in particular intercompany financing, intangible arrangements, and principal-distributor structures. A distinctive feature of the Swiss system is that every transfer pricing adjustment qualifying as a hidden profit distribution automatically triggers withholding tax at 35%, regardless of how the underlying income tax dispute is resolved. Although Switzerland imposes no formal documentation obligations beyond country-by-country reporting, the practical burden of proof rests with the taxpayer, and the absence of contemporaneous documentation significantly increases audit risk. Authorities are furthermore increasingly willing to challenge the integrity of submitted transfer pricing studies where reported values are inconsistent with observable market indicators such as share purchase prices and show a growing interest in the personal accountability of directors and advisers for transfer pricing inaccuracies.

As a structural backdrop, the OECD Pillar Two global minimum tax continues to reshape the Swiss landscape for in-scope groups. Switzerland introduced the domestic top-up tax in 2024 and the Income Inclusion Rule in 2025. The tax rate advantage of low-tax cantons is effectively neutralised for affected groups, as the shortfall to the 15% floor is collected in Switzerland rather than abroad. Compliance obligations are channeled through a single filing entity whose cantonal competence is determined by its fiscal domicile at the start of the tax year, directly linking Pillar Two to questions about domicile discussed above. The first GloBE Information Return deadline fell on June 30, 2026.

As noted in question 28, a significant increase in disputes around corporate tax domicile and transfer pricing could be expected. On the domicile side, companies with lean structures such as holding companies, IP vehicles and single-director entities face real difficulty in producing sufficient evidence that key decisions are genuinely taken at the registered seat, particularly where management activities were not documented contemporaneously. The consequences are severe, with reassessment by a higher-tax canton for multiple open years and the risk underlined by the recent decision of the Federal supreme Court that procedural missteps in appellate proceedings result in the company being taxed in two cantons simultaneously, even where the taxpayer ultimately succeeds on the merits.

In the area of transfer pricing, the absence of codified rules creates structural uncertainty that is difficult to navigate under audit. The potential withholding tax consequences of an adjustment, which are assessed by the SFTA separately from the cantonal profit tax proceedings require careful coordination across parallel proceedings and significantly complicate dispute resolution. The lack of a formal documentation obligation is a double-edged sword, as it reduces costs in the ordinary course but leaves taxpayers poorly positioned when challenged without contemporaneous studies. Company directors and advisers should also be mindful of the growing trend towards personal accountability, as where transfer pricing positions are found to be materially unreliable or where critical information was not disclosed, individual liability is increasingly explored by the authorities.

Regarding Pillar Two, now that the first GloBE Information Return has been filed, attention will shift to how the Swiss tax authorities review and challenge those returns.