Bonus Payments and Variable Compensation: Tax Treatment in Switzerland

Bonuses, commissions and employee equity are central components of remuneration packages in many industries – particularly in the financial sector, management consulting and international corporations. Variable compensation, however, follows complex tax rules. Depending on the type of payment, the tax event, social security obligations and international allocation can differ considerably.

Important note: This article describes the tax treatment under current law (as of: tax period 2025). The rules for taxing employee equity compensation are set out in the Federal Act on the Taxation of Employee Shares (in force since 2013) and the SFTA Circular No. 37 (dated 30 October 2020).

What Counts as Variable Compensation?

Variable compensation falls into three main categories:

Wage-Linked Variable Pay

• Annual bonus / 13th month salary: One-off or periodic additional payment
• Target achievement bonus (MBO): Payment upon reaching defined objectives
• Profit sharing: Share in company profits
• Commissions: Revenue- or deal-dependent pay, typical in sales roles
• Loyalty bonuses / long-service awards: Payment after a defined period of employment

Genuine Employee Equity (Echte Mitarbeiterbeteiligungen)

Genuine employee equity gives the employee a stake in the company's share capital:

• Free employee shares: Direct transfer of shares, immediately freely available
• Blocked employee shares: Transfer with a lock-up restriction (vesting block), taxed at a reduced value
• Employee stock options (listed and freely tradeable): Right to purchase shares later at a fixed price
• Employee stock options (unlisted / blocked): Tied to a vesting period or condition
• Restricted Stock Units (RSUs): Entitlement to shares transferred upon satisfaction of vesting conditions

Notional Employee Equity (Unechte Mitarbeiterbeteiligungen)

Notional employee equity refers to contractual rights whose value mirrors a shareholding, but which convey no actual ownership:

• Phantom Shares: Fictitious shareholding; paid out in cash upon value appreciation
• Stock Appreciation Rights (SARs): Right to a cash payment reflecting share price appreciation
• Value appreciation rights / cash-settled bonus plans: Related instruments with analogous mechanics

Practical note: Notional equity is popular with SMEs and start-ups as it avoids diluting share capital. For tax purposes, these instruments are treated as employment income at the time of the cash payment.

Tax Treatment of Bonuses and Commissions

Income from Employment

Bonuses and commissions are income from employment (Art. 17 para. 1 DFTA). They are taxed together with the base salary – there is no tax privilege or special deduction compared to ordinary wages.

Tax Event: Cash Flow Principle (Zuflussprinzip)

The decisive factor is the date of actual receipt, not the period for which the compensation was earned:

• Example: A bonus is paid in January 2025 for performance in 2024 → it counts as 2025 taxable income
• Consequence: If the employee changes their residence canton or moves abroad between earning and receiving the bonus, the payment date determines the tax jurisdiction. Documenting the payment date is therefore important.

Declaration in the Tax Return

Bonuses are shown on the official salary certificate (Lohnausweis) and must be declared in the tax return as employment income.

Tax Treatment of Employee Equity Compensation

The rules are set by the Federal Act on the Taxation of Employee Shares and SFTA Circular No. 37 (30 October 2020). The key factors are the tax event and the type of equity instrument.

Genuine Employee Equity: Summary by Category

CategoryTax eventTaxable amountFree employee sharesGrant dateMarket value less acquisition priceBlocked employee sharesGrant dateMarket value less lock-up discount less acquisition priceListed, freely tradeable optionsGrant dateMarket value of option at grantUnlisted / blocked optionsExercise dateShare value at exercise less exercise priceRSUs (entitlements)Vesting dateStock exchange value of shares at vestingNotional equity (Phantom, SARs)Cash payment dateCash payment amount

Free Employee Shares

Free employee shares are taxed at the grant date. The taxable amount is the difference between the market value (listed price or formula value for unlisted companies) and the acquisition price paid by the employee. The shares must also be declared as wealth in the securities schedule.

Blocked Employee Shares: Lock-up Discount

For blocked employee shares, the economic discount arising from the transfer restriction is recognised through a discount of 6% per year of restriction. The discount is calculated cumulatively, with a maximum of 10 lock-up years:

Lock-up periodDiscount1 year5.660%2 years10.980%3 years15.968%4 years20.728%5 years25.274%10 years44.161%

Important: If the lock-up restriction lapses early, the employee realises additional taxable income at that point (retrospective taxation of the discount).

Stock Options: Listed vs. Unlisted

Listed and freely tradeable options are taxed at the grant date. The taxable amount is the market value of the option at grant (e.g. using Black-Scholes).

Unlisted or blocked options / options with a vesting period are taxed at the exercise date. The taxable amount is the difference between the share value at exercise and the exercise price (Art. 17b para. 2 DFTA).

RSUs: Taxed at Vesting

Restricted Stock Units (RSUs) are classified under Swiss tax law as entitlements to employee shares (Art. 17a DFTA). During the vesting period they are neither taxable as income nor subject to wealth tax.

Tax event: RSUs are taxed at the point of vesting – when the employee acquires an irrevocable legal entitlement to the shares.

Taxable amount: The stock exchange value of the allocated shares on the vesting date, less any purchase price paid.

After vesting: Further appreciation in the value of the vested shares is a tax-free capital gain for private investors (exception: professional securities trading, see SFTA Circular No. 36).

Example: An employee receives a grant of 1,000 RSUs in 2022. The RSUs vest in 2025 (vesting date). The stock exchange value on the vesting date is CHF 50 per share → taxable income in 2025: CHF 50,000. If the price rises to CHF 70 before the shares are sold, the CHF 20,000 gain is a tax-free capital gain.

Notional Employee Equity (Phantom Shares, SARs)

Notional equity is taxed at the time of the cash payout as income from employment, applying the same cash flow principle as bonuses. No wealth tax arises during the term.

Social Insurance Aspects

AHV/IV/EO (Old-Age, Disability and Income-Replacement Insurance)

All variable pay – bonuses, commissions and benefits-in-kind from employee equity – is subject to AHV/IV/EO contributions as qualifying salary. Employer and employee each pay 5.3% (2025; total 10.6%).

At RSU vesting or option exercise, the employer must account for AHV on the taxable benefit-in-kind – even where no cash payment is made. This can create a cash flow problem for employees.

Unemployment Insurance (ALV)

ALV contributions are due on variable pay up to the maximum insured salary of CHF 148,200 per year (2025). Employer and employee each pay 1.1% (total 2.2%). Since 1 January 2023, salary components above CHF 148,200 no longer attract ALV contributions (the former solidarity levy was abolished).

Occupational Pension (BVG)

Whether variable pay is included in BVG-insurable salary depends on the pension fund's regulations. Contractually agreed and regularly paid bonuses are typically BVG-insurable salary. One-off extraordinary bonuses are treated differently depending on the rules. The maximum insurable annual salary under the BVG is CHF 90,720 (2025).

Withholding Tax for Foreign Employees

Employees without a settlement permit (C permit) resident in Switzerland, as well as cross-border commuters and weekly residents, are subject to withholding tax. The employer deducts the tax directly from gross pay.

Important: Specific calculation rules apply to benefits from employee equity (SFTA Circular No. 45). The taxable benefit is allocated to Switzerland proportionally based on Swiss working days during the vesting period.

Subsequent ordinary assessment (NOV): Employees subject to withholding tax with gross income exceeding CHF 120,000 per year are mandatorily subject to a subsequent ordinary assessment (Art. 89 DFTA). Below this threshold, employees may apply voluntarily to claim additional deductions.

Employer Reporting Obligations

Salary Certificate (Lohnausweis)

The employer is required to report all variable compensation on the official salary certificate:

• Item 3: Periodic bonuses, commissions, 13th month salary
• Item 7: Irregular, non-periodic payments
• Item 5 / Appendix: Employee equity (separately reportable)

Reporting for Employee Equity

Since the Federal Act on the Taxation of Employee Shares, there is an extended reporting obligation (Art. 129 para. 1 lit. d DFTA, Employee Equity Ordinance MBV): the employer must report every grant of employee equity – regardless of whether a taxable benefit arises at that point. For instruments taxed later (e.g. RSUs, unlisted options), the subsequently realised taxable amount must also be reported.

Employees should retain these certificates carefully – they are the basis for correct declaration in the tax return.

International Aspects: Pro-Rata Allocation

The Pro-Rata Principle

Where variable pay or employee equity was earned during a period in which an employee worked in multiple countries, the income must be allocated on a time-apportioned basis. For employee equity, the OECD Model Tax Convention Art. 15 applies: the taxable benefit is allocated to Switzerland in proportion to Swiss working days relative to the total vesting period.

Formula: Swiss share = Total benefit × (Working days in Switzerland during vesting period ÷ Total working days during vesting period)

Double Taxation Treaties (DTTs)

For employees who commute or relocate between Switzerland and another country, double taxation treaties may limit or divide taxing rights. Particularly relevant for:

• RSUs and options with multi-year vesting periods
• Bonuses paid after a change of residence
• Cross-border commuter arrangements (e.g. special treaties with Germany, France, Italy, Austria)

The competent cantonal tax authority or a tax adviser can provide a binding advance ruling on how such situations are treated.

Taxation on Departure from Switzerland

Where employee equity (particularly RSUs and options) vests or becomes exercisable after the employee has left Switzerland, the pro-rata OECD principle applies. The Swiss share is subject to withholding tax (flat rate of 11.5% for direct federal tax for non-residents; cantonal rates vary). The employer is required to withhold.

Practical Examples

Example 1: Bonus Payment (Cash Flow Principle)

An employee in Zurich receives a performance bonus of CHF 25,000 in March 2025 for the 2024 financial year. Payment date: 15 March 2025.

• Tax period: 2025 (not 2024)
• Income tax: CHF 25,000 added to 2025 taxable income
• AHV/ALV: Employer settles AHV (5.3% employee share) and ALV (1.1% employee share)
• Salary certificate: Shown under item 3 or 7

Example 2: RSU Vesting

An employee of a US corporation with its Swiss seat in Zurich receives a grant of 2,000 RSUs on 1 January 2022. These vest on 1 January 2025 (3-year vesting). Stock exchange value on vesting date: CHF 40 per share.

• Taxable income 2025: 2,000 × CHF 40 = CHF 80,000
• Withholding tax (if B permit): Employer settles withholding tax on CHF 80,000
• AHV liable: Yes, on CHF 80,000 (employee share 5.3% = CHF 4,240)
• RSUs before vesting: No wealth tax, no taxable income
• Sale of shares later for CHF 55: Gain of CHF 15 per share (CHF 30,000) = tax-free capital gain

Example 3: Stock Option (Unlisted)

An employee receives options on shares of an unlisted GmbH in 2021. Exercise price: CHF 100 per share. Vesting: 2023. Exercise: 2025. Formula value at exercise: CHF 250 per share.

• Tax event: 2025 (exercise) – not 2021 (grant) or 2023 (vesting)
• Taxable amount: CHF 250 − CHF 100 = CHF 150 per option × number of options

Example 4: Blocked Employee Shares

An employee receives shares in 2025 with a 5-year lock-up restriction. Formula value: CHF 200 per share. Acquisition price: CHF 0 (free allocation).

• Discount (5 years): 25.274%
• Taxable value: CHF 200 × (1 − 25.274%) = CHF 149.45 per share
• Tax event: 2025 (grant date)

Example 5: International Pro-Rata Allocation (RSUs)

An employee receives RSUs in 2022. Vesting in 2025 (3-year period = 780 working days total). He worked 520 days in Switzerland and 260 days abroad. Total benefit at vesting: CHF 60,000.

• Swiss share: CHF 60,000 × (520 ÷ 780) = CHF 40,000 → taxable in Switzerland
• Foreign share: CHF 20,000 → taxable abroad under relevant DTT

Common Mistakes and Tips

Common Mistakes

• Assuming bonuses are tax-privileged: Bonuses are taxed in full as employment income
• Wrong tax event for options: Unlisted options are taxed at exercise (not at grant); listed, freely tradeable options at grant
• Treating RSUs as immediately taxable: RSUs are only taxable at vesting, not at grant
• Declaring unvested RSUs as wealth: Unvested RSUs are not subject to wealth tax
• Forgetting AHV: Benefits-in-kind from employee equity are also AHV-liable salary – even where no cash is paid
• Discarding employer certificates: Without the employer's employee equity certificate, correct declaration cannot be substantiated
• No advance ruling in international situations: Multi-year vesting periods and changes of residence should be clarified with the tax authority early on

Tips

• Retain all documentation: Grant letters, vesting notices, exercise confirmations, employee equity certificates
• Know your withholding tax position: Those working without a C permit should apply for the subsequent ordinary assessment once gross income exceeds CHF 120,000
• Plan for liquidity at RSU vesting: AHV and tax obligations arise immediately at vesting – even if shares are not yet sold
• Document international work history: For multi-year vesting periods, keep a complete record of working days per country
• Request an advance ruling where uncertain: Cantonal tax authorities issue binding advance rulings on planned transactions
• Engage a tax adviser for complex packages: Particularly when combining bonuses, RSUs and options

Summary

Variable compensation is more tax-complex than often assumed. Bonuses and commissions are straightforwardly treated as employment income – the cash flow principle determines the tax year. Employee equity, by contrast, requires precise knowledge of the applicable tax event: listed options are taxed at grant; RSUs at vesting; unlisted options at exercise. Layered on top are social insurance obligations, employer reporting duties and international allocation rules.

Those who retain complete documentation, understand the cash flow principle and clarify international situations early will avoid surprises when the tax bill arrives.