Methodology

See how Impôt Suisse works out your tax estimates and which data sources it relies on.

  • Official data

  • 26 cantons

  • Updated every year

  • 2025 FTA tax scales

Why are our estimates reliable?

Our commitment rests on four principles.

Official data

All our data comes from the federal and cantonal tax authorities.

Verified sources

Transparent calculation

Our calculation method is documented and based on clear tax rules.

Methodology explained

Annual updates

Our tax scales and rates are updated each year based on official publications.

2025 tax scales

Indicative estimate

The results provided are estimates and do not replace an official tax decision.

For guidance only

How does our calculation work?

A simple five-step process.

How does our calculation work?

Estimate example

See how an estimate is calculated from a simplified tax profile.

1

Your information

Data entered in the simulator.

Canton

Geneva

Gross annual income

CHF 95'000

Situation

Married

Dependent children

2

Pillar 3a

Yes

Information used only for this simulation.

2

Rules applied

Our simulator applies automatically.

Official tax scales

Cantonal tax scales Geneva 2025

Federal direct tax (IFD)

Applicable deductions

Pillar 3a deductions

Child deductions

Social and professional deductions

Contributions

Official rates 2025

3

Your estimate

Annual estimate based on official 2025 data.

Taxes applied

Estimated ICC

CHF 8'420

Estimated IFD

CHF 1'150

Total tax burden

CHF 9'570

Effective rate

10.07%

The effective rate is the ratio between the total tax burden and gross income.

*This estimate is indicative and may differ from the amount officially due.

What does the calculation take into account?

The main elements used by our simulators to estimate your tax burden.

Income

All declared or estimated sources of income.

  • Salary

  • Self-employment income

  • Dividends

  • Wealth

Situation

Your personal and geographic situation.

  • Canton

  • Family situation

  • Dependent children

  • Cross-border workers

Deductions

The deductions applicable to your situation.

  • Pillar 3a

  • Professional expenses

  • Mortgage interest

  • Social deductions

Assets

Your assets taken into account in the calculation.

  • Real estate

  • Net wealth

Official sources

Our calculations rely solely on data published by the competent authorities.

Official sources

FTA

Federal Tax Administration - the primary source for the IFD and TVA.

Cantonal administrations

Tax data specific to each of Switzerland's 26 cantons for the ICC.

Official 2025 tax scales

Rates and income brackets in force for the 2025 tax year.

Swiss legislation

Federal and cantonal tax laws updated regularly.

Special cases

Certain situations can influence the result of your estimate.

Foreign income

Foreign income

Income from abroad may be subject to specific tax treaties between Switzerland and the source country. This can influence your overall tax rate.

What changes

  • Foreign income declaration

  • Applicable tax treaty

  • Possible tax credit

Medium

FTA • Tax treaty

What our calculation takes into account

Our estimates rely solely on the information you provide and on the official scales published by the tax authorities.

Taken into account

  • Tax simulation

    Estimate based on the official scales.

  • Intercantonal comparison

    Calculation based on the selected canton.

  • Standard deductions

    Application of the deductions provided for by law.

  • Official scales

    Updated according to FTA publications.

Out of scope

  • Official tax decision

    Only the tax administration is authoritative.

  • Personalised advice

    No individual tax recommendations.

  • Complex legal situations

    Some situations require expert advice.

  • Undocumented special cases

    Exceptional situations may change the result.

This estimate is provided for guidance only and does not replace an official tax decision.

Frequently asked questions

Answers to the most common questions.

No. The results are estimates based on the official data available.

Questions about our calculations?

Our team can help you make sense of the results.

Our Calculation Method & Data Sources | Impôt Suisse