Personal income tax constitutes the central pillar of the Swiss tax system. In Switzerland, it is levied simultaneously by the Confederation — in the form of direct federal tax (DFTA), governed by the Federal Act on Direct Federal Tax (DFTA) — and by each canton and municipality, within the framework set by the Federal Act on the Harmonisation of Direct Taxation of Cantons and Municipalities (TAHA). PBM Avocats, present in Geneva and Lausanne, advises individuals, self-employed persons and cross-border workers on all matters relating to income tax: optimisation of deductions, challenging an assessment decision, tax reassessment procedures and representation before tax authorities.
Income Tax Liability: Who Is Taxed in Switzerland?
Liability to direct federal tax is governed by art. 3 to 6 DFTA. Natural persons are liable by reason of personal nexus if they have their fiscal domicile or residence in Switzerland. Fiscal domicile is determined according to factual criteria: the place where the person resides with the intention of settling there permanently, taking account of all the circumstances (work, family, social ties). In the absence of a domicile, a stay of 30 days (for persons carrying on a gainful activity) or 90 days (without gainful activity) suffices to establish liability.
Unlimited liability covers the taxpayer's worldwide income (principle of worldwide income), with the exception of income from permanent establishments and properties situated abroad, attributed by double taxation treaties (DTTs) to the state of situation. Persons who are not domiciled in Switzerland but who realise certain income there (income from Swiss properties, income from an employed activity carried on in Switzerland, etc.) are liable in a limited manner, in accordance with art. 5 DFTA.
Cross-border workers residing in neighbouring France and working in the cantons of Geneva or Vaud are subject to specific rules arising from the Franco-Swiss convention of 9 September 1966 and the Franco-Genevan tax agreement. Their taxation was the subject of significant changes following the new agreement signed on 27 June 2023, applicable from 1 January 2026 for Franco-Genevan cross-border workers.
Schedules and Rates of Direct Federal Tax
The DFTA is a progressive income tax. The schedule applicable to single persons is distinct from that applicable to married couples and taxpayers with dependent children (art. 36 DFTA). Progressivity is achieved through brackets: the maximum marginal rate of 11.5% applies to the fraction of taxable income exceeding CHF 769,700 (schedule for single persons, 2025 status) or CHF 912,600 (schedule for couples and taxpayers with children). Below CHF 17,800 of taxable income, no DFTA is due.
Cantons and municipalities set their own schedules and rates, respecting the framework set by the TAHA but enjoying broad autonomy. In Geneva, cantonal and municipal income tax is calculated according to its own progressive schedule, with variable municipal coefficients. In Lausanne, the city applies a municipal coefficient that is added to the Vaud cantonal tax. The total tax burden (DFTA + cantonal + municipal) varies significantly depending on the place of domicile, which is lawfully exploitable within the framework of tax planning.
Certain particular forms of income benefit from distinct taxation rules. Capital benefits from occupational pension (second pillar) and third-pillar 3a are taxed separately, at a reduced rate (art. 38 DFTA). Liquidation profits on cessation of a self-employed activity (art. 37b DFTA) also benefit from preferential taxation under certain conditions.
Deductions and Optimisation of the Tax Burden
The DFTA and cantonal legislation provide for numerous deductions allowing taxable income to be lawfully reduced. The main general deductions (art. 33 DFTA) are as follows: professional expenses (commuting, meals, miscellaneous costs according to schedules set by the Federal Tax Administration), health and accident insurance premiums (deductible within flat-rate limits), third-pillar 3a payments (CHF 7,258 for employees and CHF 36,288 for self-employed without a second pillar in 2025) and second-pillar occupational pension fund repurchases (art. 33 para. 1 let. d DFTA), which often constitute the most effective planning tool for high-income taxpayers.
Property-related deductions (maintenance, administrative costs, insurance premiums) are also admissible as deductions from rental income. For the principal residence, the owner may choose between deducting actual costs or a flat-rate deduction (10% or 20% of the imputed rental value depending on the age of the property). Donations to recognised public benefit institutions (art. 33a DFTA) are deductible up to 20% of net income, provided they amount to at least CHF 100.
PBM Avocats analyses your overall tax situation to identify the deductions to which you are entitled and structure your income optimally, in strict compliance with the law.
Tax Procedures: Objection, Tax Reassessment and Evasion
When a tax assessment decision appears erroneous, the taxpayer has a right of objection (art. 132 DFTA) within 30 days of notification. This deadline is mandatory and its compliance is essential. PBM Avocats examines the decision received, identifies factual or legal errors and drafts the reasoned objection. If this first step does not succeed, an appeal before the competent cantonal instance, then before the Federal Supreme Court, may be considered.
In the event of omissions in past returns, the tax reassessment procedure (art. 151 ff DFTA) may be opened by the tax authority up to ten years back. If these omissions constitute tax evasion (art. 175 DFTA), administrative sanctions are added to the reassessment. A voluntary disclosure without penalty (art. 175 para. 3 DFTA) may allow fines to be avoided if the statutory conditions are met.
Frequently Asked Questions on Income Tax
What income is taxable under direct federal tax in Switzerland?
Art. 16 DFTA establishes a general principle of taxation: all income from any source is taxable, except for express statutory exceptions. Taxable items include in particular employment income (salaries, bonuses, gratuities, monetary benefits), income from self-employment, income from movable assets (dividends, interest) and real estate assets (rents, imputed rental value of owner-occupied dwellings), pensions and annuities (AVS/AHV, OPA/BVG, life annuities), as well as replacement income (unemployment, illness and accident benefits). Capital gains on private movable assets (sale of shares, bonds) are, however, exempt for natural persons who do not carry on professional securities trading.
What are the main deductions admissible under direct federal tax?
The DFTA provides for several categories of deductions. General deductions (art. 33 DFTA) include private passive interest (deductible up to the net asset yield increased by CHF 50,000), health and accident insurance premiums (deductible on a flat-rate basis), third-party childcare costs, payments to third-pillar 3a (art. 33 para. 1 let. e DFTA, within annually set limits), occupational pension fund repurchases (art. 33 para. 1 let. d DFTA) and donations to public benefit institutions (art. 33a DFTA, from CHF 100, up to 20% of net income). Professional expenses (art. 26 DFTA) include commuting costs, off-premises meals and professional training and development costs (art. 33 para. 1 let. j DFTA, up to CHF 12,900 per year).
How does the taxation of married couples work in Switzerland?
Spouses living in a common household are taxed jointly (art. 9 DFTA), their incomes being added together. This joint taxation system may result in higher tax progression than for two single persons with the same incomes — this is the so-called 'marriage penalty' problem. To mitigate this effect, the law provides for a dual-income couple deduction (art. 33 para. 2 DFTA) equal to 50% of the lower professional income, but at a minimum of CHF 8,500 and a maximum of CHF 13,900 (for 2025). Registered partners are treated as spouses. Cohabitants, however, are taxed separately, which may be an advantage or disadvantage depending on the situation.
What is the difference between a tax reassessment and tax evasion?
A tax reassessment (art. 151 DFTA) is an administrative procedure that allows the taxation authority to correct an insufficient assessment over the past ten years when taxable elements have been omitted. It gives rise to payment of the unpaid taxes, together with default interest, but is not in itself a sanction. Tax evasion (art. 175 DFTA) is a tax offence committed intentionally or through negligence: the taxpayer has, for example, failed to declare income or assets. It is penalised by a fine of up to three times the evaded tax. Tax fraud (art. 186 DFTA), a more serious offence committed through the use of forged documents, may result in a custodial sentence. PBM Avocats assists you in all such proceedings.
Can a tax assessment decision be challenged in Switzerland?
Yes. The challenge procedure comprises several stages. First, the taxpayer may file an objection (art. 132 DFTA) with the taxation authority within 30 days of notification of the assessment decision. If the objection is rejected, an appeal may be lodged before the competent cantonal objection commission or administrative court, then before the Federal Supreme Court (public law appeal, art. 82 ff BGG/LTF). At cantonal level, deadlines and instances vary. PBM Avocats advises you on the advisability of a challenge and represents you at each stage of the procedure.