International tax treaties of Switzerland: how to avoid double taxation in 2026

Last reviewed: November 2026 · Reviewed by Stéphane Gombauld, tax expert, technologist and digital nomad

You live in Switzerland but earn from abroad, or the reverse, and two tax offices want the same income. This guide explains how Swiss double tax agreements work in 2026, how to use them for salary, dividends and pensions, and where the rules with neighbouring countries differ.

Switzerland international tax treaties in 2026: the key figures

Is this guide for you?

Read on if you…

• live in Switzerland and receive a salary, dividends or a pension from another country;
• live abroad and earn Swiss salary, Swiss dividends or run a Swiss company;
• split your year between Switzerland and another country and are not sure which one taxes you.

Probably not your case if you…

• live and earn entirely within Switzerland with no foreign income or assets;
• are a multinational tax director working on Pillar Two allocation (this guide covers individuals and small companies).

How do Swiss double tax agreements work?

A double tax agreement (DTA) is a treaty between two countries that allocates taxing rights so the same income is not fully taxed twice. Switzerland's treaties follow the OECD Model Convention, which makes them predictable: the same article numbers appear in almost every treaty.

The main articles you will meet:

• Article 4 – Residence: who counts as resident and how to break a tie.
• Articles 5 and 7 – Permanent establishment and business profits.
• Articles 10 to 12 – Dividends, interest, royalties: the maximum withholding tax the source country may keep.
• Article 15 – Employment income: where salary is taxed, including the 183-day rule.
• Article 23 – Method: how your residence country removes the double tax.

Here's the catch. A treaty never creates tax; it only limits what each country's domestic law can take. You first check Swiss law, then the other country's law, then the treaty. Switzerland's domestic residence rules are in our guide to obtaining Swiss tax residency.

Switzerland also signed the OECD Multilateral Instrument (MLI), in force for Switzerland since 1 December 2019, so most Swiss treaties now include a principal purpose test against treaty shopping.

Which country taxes me if both claim me as resident?

Switzerland treats you as resident after 30 consecutive days with gainful activity, 90 days without, or when your centre of vital interests is here. Your old country may still consider you resident too. Article 4 of the treaty breaks the tie in strict order:

1. Permanent home. Where you have a home permanently available. If you have one in both countries, go to step 2.
2. Centre of vital interests. Where your personal and economic ties are closer: partner, children, main job, where your money is managed.
3. Habitual abode. Where you spend more time.
4. Nationality. If still tied, the authorities settle it by mutual agreement.

The winner taxes your worldwide income. The loser can tax only what the treaty allows it as a source state. For a remote worker keeping a flat in Berlin and renting in Zurich, step 2 usually decides. Our guide to ceasing Swiss tax residency covers the same test from the other direction.

For companies, the tie-breaker is the place of effective management, or mutual agreement under the MLI version. A company you incorporate abroad but run from Switzerland loses the tie-break to Switzerland. See corporate income taxes in Switzerland.

How is my salary taxed when I work across borders?

The 183-day rule

Under Article 15, salary is taxed where the work is physically performed. The exception has three cumulative conditions. You spend fewer than 183 days in the work state in the relevant period. Your employer is not resident there. And your salary is not borne by a permanent establishment there. Miss any one condition and the work state taxes the days worked there from day one.

For a Swiss resident on a three-month project in Spain for a Swiss employer, Spain gets nothing. Hired by a Spanish company instead, Spain taxes those three months and Switzerland exempts them with progression.

Cross-border commuters

Switzerland's treaties with its neighbours include special commuter (Grenzgänger, frontalier) rules that override the normal article:

• Germany: commuters who return home daily are taxed in their residence state; the work state may withhold 4.5% of gross salary. Staying away more than 60 nights a year for work ends commuter status. Since 2023, home-office days count as work days without breaking the regime.
• France: for most cantons (Vaud, Valais, Neuchâtel, Jura, Bern, Basel-Stadt, Basel-Landschaft, Solothurn), commuters are taxed in France, which pays a compensation to Switzerland. Geneva taxes commuters at source and compensates French municipalities. Since 2023 up to 40% of working time can be teleworked from France without changing the allocation.
• Italy: the agreement in force since 2024 taxes new commuters in both states with a credit, at up to 80% of ordinary tax in Switzerland; commuters recognised before July 2023 remain taxed in Switzerland only. Remote work of up to 25% is allowed.

How do treaties reduce withholding tax on dividends and interest?

Switzerland levies a 35% withholding tax on dividends from Swiss companies and on interest from Swiss bonds and bank accounts. Swiss residents get a full refund by declaring the income. Non-residents rely on treaties.

Under most treaties the Swiss rate falls to 15% on portfolio dividends and to 0% or 5% on dividends paid to a parent company holding 10% to 25% or more. Interest is usually reduced to 0%. You claim the refund from the Federal Tax Administration within three years after the end of the calendar year the payment fell due, using the treaty-specific form and a certificate of residence from your home tax office.

Going the other way, a Swiss resident receiving foreign dividends pays Swiss income tax on the gross amount. The foreign withholding tax the treaty allows (typically 15%) is credited against Swiss tax through the foreign tax credit procedure in your return. Any excess withheld above the treaty rate must be reclaimed from the foreign country, not from Switzerland. Capital gains on those shares stay tax-free in Switzerland; see capital gains tax in Switzerland.

What about information exchange and treaty abuse?

Treaties come with teeth. Switzerland exchanges financial account data automatically with more than 100 partner jurisdictions under the OECD Common Reporting Standard. Crypto-asset reporting follows from 2026 with first exchanges in 2027. Undeclared foreign income is tax evasion; our guide to tax fraud regulations of Switzerland explains the fines and the one-off voluntary disclosure.

A holding company set up in a treaty country only to reclaim Swiss withholding tax will be refused under the principal purpose test.

Common mistakes (and what they cost)

• Counting 183 days as the only test → if your employer is in the work state or bears your cost, that state taxes you from day one, and you face a late assessment with interest.
• Not filing the Swiss withholding tax reclaim within three years → the 35% is lost for good; on CHF 50,000 of dividends that is CHF 17,500.
• Keeping a "permanent home" in your old country → the tie-breaker may hand your worldwide income to a higher-tax country.
• Assuming the treaty exempts foreign rental income entirely → Switzerland exempts it but applies progression, so your Swiss rate on other income rises.

Frequently asked questions

How many double tax treaties does Switzerland have?

Switzerland has comprehensive double tax agreements on income taxes with more than 100 countries, covering every EU member state, the United Kingdom, the United States, China, India, Japan and most of Asia and Latin America. Many also cover wealth or capital taxes. The State Secretariat for International Finance publishes the full list with the current text of each agreement and protocol.

What is the 183-day rule in Swiss tax treaties?

If you work temporarily in a treaty country, your salary stays taxable only in your residence country when you spend fewer than 183 days there in the relevant period, your employer is not resident in that country, and your salary is not charged to a permanent establishment there. All three conditions must hold. Otherwise the work country taxes the days worked on its territory.

Can I reclaim Swiss withholding tax as a non-resident?

Yes, if your country has a treaty with Switzerland. You pay 35% at source and reclaim the difference above the treaty rate, usually 15% on portfolio dividends and 0% on interest, from the Federal Tax Administration. File the treaty-specific form with a residence certificate within three years of the end of the year the payment fell due.

Which country taxes me if I live in Switzerland and work remotely for a foreign company?

Switzerland, as your residence state, taxes your salary for days worked in Switzerland. Days physically worked in the employer's country may be taxed there if you exceed the 183-day limits or if the employer is resident there. Switzerland then exempts those days with progression. Cross-border commuter rules with Germany, France, Italy and Austria modify this for people who return home daily.

How does Switzerland avoid double taxation on foreign income?

For most foreign income, Switzerland uses exemption with progression: the foreign income is not taxed but is counted to set the rate on your remaining income. For foreign dividends, interest and royalties that suffered treaty-allowed withholding tax, Switzerland grants a credit against Swiss tax through the foreign tax credit procedure declared in your tax return.

Does Switzerland tax my foreign pension?

Usually yes, if you live in Switzerland. Most treaties give the residence state the right to tax private pensions and annuities, so a German or UK private pension is taxed in Switzerland at ordinary rates, and the paying country must exempt it. Public-service pensions are generally taxed only by the paying state. US Social Security follows the specific rule in the US–Swiss treaty.

Related guides

• How to obtain tax residency in Switzerland
• How to cease tax residency in Switzerland
• Capital gains tax in Switzerland
• Corporate income taxes in Switzerland
• Tax fraud regulations of Switzerland
• Switzerland tax landscape overview
• International tax treaties of Austria
• International tax treaties of France
• All country tax guides

Sources

• State Secretariat for International Finance (SIF) – double taxation agreements
• Swiss Federal Tax Administration (FTA) – withholding tax and international matters
• Federal Act on Direct Federal Taxation (DBG, SR 642.11) – Fedlex
• OECD Model Tax Convention and Multilateral Instrument
• OECD – Automatic exchange of information

This guide is general information, not personalised tax advice. See how we research and review.