Expat tax advisor in Vaud — Swiss taxes explained in English
Swiss tax is rarely difficult because of one form. It becomes difficult when permit, withholding tax, family situation, 3rd pillar, foreign income and Swiss company plans interact.
Robuste Fiduciaire supports English-speaking expats, international professionals, cross-border workers and foreign founders in Vaud. We explain the Swiss tax logic in English, prepare the French-language filings when relevant and coordinate accounting, VAT, payroll and annual tax obligations when your situation becomes entrepreneurial.
Three expat profiles — the same word “tax” does not mean the same obligation
Good advice starts by separating situations. A permit B employee, a permit C resident, a cross-border worker and a foreign founder do not have the same filing duties, deadlines or optimisation options.
Permit B or L, taxed at source
You receive a Swiss salary and withholding tax is deducted by the employer. The key question is not only “how much was withheld?”, but whether the scale is correct and whether TOU would help or hurt.
- Review of withholding tax scale and family status
- TOU simulation before request
- 3a and deductible items checked if ordinary taxation is relevant
Permit C or ordinary taxation
You file a full annual tax return. Income, wealth, foreign assets, family situation, real estate, debt interest and pension contributions must be treated coherently.
- Annual tax return preparation or review
- Swiss and foreign assets mapped carefully
- Tax planning for household and retirement decisions
Swiss company or self-employment
Your personal tax cannot be separated from accounting, salary, dividends, VAT and payroll. The wrong setup can create avoidable costs or unclear documentation.
- Salary, dividends and social contribution coordination
- VAT threshold and invoicing logic reviewed
- Accounting and annual closing aligned with tax filing
Permit B, C or G — what changes for taxes in Vaud?
The permit does not decide everything alone, but it usually determines the starting procedure: withholding tax, ordinary taxation, cross-border treatment or a combination of several rules.
| Situation | Typical tax mechanism | Main risk | Robuste check |
|---|---|---|---|
| Permit B employee resident in Vaud | Withholding tax deducted by employer; TOU may be mandatory or voluntary depending on income, assets and other income. | Wrong scale, missed 31 March deadline, TOU requested without simulation. | Scale + TOU review |
| Permit C resident | Ordinary annual tax return, generally including income and wealth. | Foreign assets, family situation or deductions declared inconsistently. | Annual return |
| Permit G / cross-border | Depends on residence country, Swiss work pattern, employer and applicable agreement. | Confusion between social security, tax residence and remote-work rules. | Cross-border mapping |
| Foreign founder / director | Personal tax plus Swiss company accounting, payroll, VAT and corporate tax. | Mixing private and company expenses; salary/dividends not documented. | Integrated review |
In Vaud, mandatory TOU can apply when gross income subject to withholding tax exceeds CHF 120,000, but also when the taxpayer has other non-withholding-taxed income or taxable assets. A voluntary TOU request must be filed within the deadline and cannot be treated like a simple “deduction request”.
Taxed at source does not always mean “nothing to do”
Withholding tax is deducted by the employer, but the rate depends on salary, family situation, residence, scale and sometimes the spouse’s income logic. Errors are common because HR receives partial information or because the situation changes during the year.
When a recalculation may be relevant
A recalculation is not a full deduction process. It is generally limited to specific situations such as wrong taxable salary calculation, wrong annual income used for the rate or an incorrect withholding tax scale.
When TOU may be relevant
Ordinary subsequent taxation may become relevant if you want to claim deductions, if it is mandatory due to your income/assets, or if a simulation shows a defensible advantage for your situation.
The result can be better or worse than the tax already deducted. A serious fiduciary should simulate the effect before filing a request, especially when 3a, childcare, debt interest, foreign income or wealth are involved.
What can be optimised — and what must first be checked
Tax optimisation for expats is not a list of generic deductions. It depends on whether you are taxed at source, whether TOU is available or mandatory, and whether your documents support the position.
3rd pillar 3a
For 2026, the ordinary employee limit is CHF 7,258 when affiliated with a pension fund. Self-employed persons without a pension fund may use 20% of net earned income, capped at CHF 36,288.
Children and childcare
Family situation affects tax scale and ordinary taxation. Childcare deductions must be supported by documents and depend on the applicable rules and the household situation.
Professional expenses
Transport, meals, professional costs and home-office situations must be reviewed carefully. Not every expense paid by an expat is deductible in the Swiss tax sense.
Foreign bank accounts and property
Foreign wealth can matter even when income is mainly Swiss. It may influence ordinary taxation, wealth tax and the global rate logic used in Switzerland.
Mortgage and interest
Debt interest, real estate and foreign property require a coherent declaration. The issue is often less the amount itself than correct allocation and documentation.
Special expatriate costs
Some temporary executives or specialists may have specific expatriate deductions, but this is not automatic. The status, assignment and employer documentation must be checked.
Your first-year tax checklist in Vaud
The first year is where many problems start: late registration, unclear withholding tax scale, no 3a planning, foreign assets forgotten, or company plans started without VAT and payroll coordination.
Register with your commune
Foreign residents taking residence in Vaud must announce themselves to the commune’s residents control office within the applicable short deadline, generally eight days.
Check your tax scale
Verify that your employer uses the correct withholding tax scale based on family situation, residence and available documents.
Open 3a early if relevant
3a contributions can be powerful, but only within the legal limits and if the conditions match your situation.
Map foreign elements
Bank accounts, property, securities, debt and foreign income should be mapped before the annual tax period closes.
Review before 31 March
TOU requests and some withholding tax corrections are deadline-sensitive. Late reactions can remove options.
Running a Swiss company as an expat: tax, accounting, VAT and payroll must work together
For foreign founders, the most expensive mistake is to treat each topic separately. A company setup affects personal taxation, salary, dividends, social contributions, bookkeeping, annual closing and VAT registration.
| Topic | What must be decided | Related Robuste service |
|---|---|---|
| Company formation | Legal form, shareholder/director structure, bank and administrative steps. | Company formation in Switzerland |
| Accounting | Chart of accounts, document workflow, bank reconciliation and annual closing readiness. | Accounting in Vaud |
| VAT | CHF 100,000 threshold, taxable supplies, rates, method and registration timing. | Swiss VAT support |
| Payroll | Director salary, employee payroll, social contributions and salary certificates. | Payroll services in Vaud |
| Annual closing | Financial statements, tax return basis and consistency between accounts and fiscal data. | Annual closing |
A structured fiduciary response — not generic expat advice
Swiss tax advice is useful only when it is connected to documents, deadlines and your exact situation.
Situation summary
You describe your permit, residence, work, family and company situation in English.
Document list
We ask only for documents that are necessary for a reliable first assessment.
Risk and options review
We identify deadlines, possible TOU, deductions, tax scale issues and business implications.
Quote and scope
The scope is clarified before work starts: consultation, tax return, company support or ongoing fiduciary mandate.
Filing or implementation
When the mandate is accepted, we prepare or coordinate the relevant tax, accounting or fiduciary work.
Fees depend on the real scope: simple review, full annual tax return, cross-border analysis, foreign assets, Swiss company, VAT, payroll or accounting. The quote is established after the situation is described.
Common expat tax questions in Vaud
Short answers first. The final decision should always be checked against your documents and the current cantonal instructions.
It depends. Many permit B employees are taxed at source. In Vaud, ordinary subsequent taxation may become mandatory if the gross annual income subject to withholding tax exceeds CHF 120,000, or if there are other non-source-taxed income or taxable assets. A voluntary request is possible under conditions and should be simulated first.
A permit C generally means ordinary taxation instead of ongoing withholding tax. You file an annual tax return, including income, wealth and deductions. The transition should be checked with the canton’s rules and your employer’s payroll treatment.
A simple withholding tax recalculation is limited. Additional deductions are generally considered through ordinary subsequent taxation if the conditions are met. That is why the first step is to check whether TOU is available, mandatory or financially sensible.
Often yes, but not automatically. The 3a deduction depends on income subject to Swiss social security and the applicable limit. For 2026, the employee limit with a pension fund is CHF 7,258. The tax impact depends on your canton, commune, income and taxation procedure.
Some non-resident taxpayers can request ordinary subsequent taxation when quasi-resident conditions are met, notably when at least 90% of worldwide gross income is taxable in Switzerland. This must be checked annually and should not be confused with social security rules.
Not always from day one. Swiss VAT liability generally depends on taxable turnover and the type/place of supplies. For ordinary businesses, the relevant threshold is generally CHF 100,000 per year for taxable supplies, but foreign businesses and specific sectors need a careful review.
Describe your situation in English
Permit, salary, family situation, cross-border work, Swiss company, VAT, 3rd pillar or annual return — send the facts you already know. A structured response or quote is usually provided within 24 working hours.
By submitting the form, you agree to be contacted by Robuste Fiduciaire regarding your request. Data is used only to process your inquiry and prepare a possible mandate or quote.
Swiss tax should not remain a black box because the forms are in French.
Get a clear English explanation, a careful tax position and a fiduciary process aligned with Swiss rules, Vaud practice and your real situation.