Tax residence in Switzerland for Singapore taxpayers

Switzerland taxes you as a resident once you have a Wohnsitz there or stay 30 days while working (90 days without work); foreign employees with a B or L permit pay tax at source. Singapore decides residence for the calendar year by days, normal residence or the IRAS two- and three-year rules. A dual resident is assigned to one country by Art. 4(2) of the Singapore–Switzerland Agreement of 2011, and Swiss treaty relief may depend on bringing the income into Singapore (Art. 22).

Check your status: Singapore and Switzerland

Free, no sign-up, about 3 minutes. Conclusion under Singapore's Income Tax Act 1947, compared with the law of Switzerland and the tax treaty (DTA).

When Switzerland treats you as a tax resident

Switzerland treats you as resident if you have a tax domicile there (Wohnsitz: a home with the intention of staying, the centre of your life) or, already, if you stay 30 days while working or 90 days without working.

A home and family in Switzerland establish a tax domicile (Wohnsitz): you are a Swiss resident with unlimited tax liability (federal, cantonal and communal income taxes on worldwide income).
You stayed in Switzerland at least 30 days while working (or 90 days without working) — a tax stay (Aufenthalt): you are a Swiss resident from the first day of your stay.

When you are a non-resident

A stay solely for study or medical treatment does not create Swiss residence (Art. 3(4) DBG).
The 30/90-day thresholds are not met and you have no Wohnsitz — you are not a Swiss resident. Salary for work physically performed in Switzerland is taxed there if a Swiss employer or a Swiss permanent establishment pays it (tax at source). With a non-Swiss employer, Art. 15(2) of the Singapore–Switzerland Agreement applies (183 days in the calendar year concerned).

Where the rules of Switzerland clash with Singapore tax rules

Dual residence: Switzerland and Singapore both tax you as a resident. Switzerland taxes you on worldwide income once you have a Swiss Wohnsitz or a tax stay of 30 days with work (90 without). Singapore makes you resident with 183 days of presence or employment in the calendar year, as a citizen or permanent resident who normally resides in Singapore, or as a foreign employee under the IRAS two- or three-year rules. The tie-breaker in Art. 4(2) of the Singapore–Switzerland Agreement then decides treaty residence: permanent home → centre of vital interests → habitual abode (also where you have a permanent home in neither State) → nationality → mutual agreement.
Switzerland treats you as resident after 30 or 90 days. Switzerland needs only 30 days of presence while working (90 without), even with temporary interruptions. A hotel or temporary accommodation is not a permanent home for the treaty: if your only permanent home is in Singapore, Art. 4(2) of the Agreement makes you a Singapore resident, and Switzerland may then tax salary for your Swiss workdays only under Art. 15(2) — more than 183 days in the calendar year concerned, or a Swiss employer or Swiss permanent establishment bearing the pay.
Family in Switzerland. For Switzerland, married persons have their Wohnsitz where the joint family home is. If you have a permanent home in both countries, Art. 4(2)(a) of the Singapore–Switzerland Agreement looks to the centre of vital interests — and a family living in Switzerland pulls it there, even if Singapore treats you as resident under its own law.

What else to know

Year of arrival or departure: Switzerland taxes from the day you arrive, Singapore for the whole year. Swiss liability runs from the day you acquire Wohnsitz or Aufenthalt until you leave (pro rata), with the rate set on annualised income. Singapore has no split year: your status is decided for the whole calendar year and applies to the following Year of Assessment, so in the year you move both countries can treat you as resident for the same months.
Tax at source (Quellensteuer) for B- and L-permit holders. As a foreign national you will normally hold a B (residence) or L (short-term) permit rather than a C (settlement) permit, so a Swiss employer withholds income tax at source from your salary. With gross income of CHF 120,000 or more an ordinary assessment (tax return) is mandatory; below that you can request one by 31 March of the following year, irrevocably. If your employer has no seat or permanent establishment in Switzerland (e.g. a Singapore employer while you work remotely from Switzerland) and no Swiss establishment bears the salary, nothing is withheld and you are taxed by ordinary assessment. Keep Swiss withholding statements and assessments: you need them if you claim a foreign tax credit in Singapore.
Salary for work in Switzerland while Singapore is your state of residence. If Singapore is your treaty residence, Switzerland may tax salary for work physically performed in Switzerland only if you are present there more than 183 days in the calendar year concerned, or the employer is Swiss-resident, or a Swiss permanent establishment or fixed base bears the cost (Art. 15(2)). Singapore generally does not tax foreign-sourced income of a resident individual — income not brought into Singapore is outside the charge, and income received in Singapore is exempt (ss. 10(1), 13(7A) ITA 1947); where the pay is taxable in Singapore, the Swiss tax is credited (Art. 23(1)(a)).
Remittance clause: Swiss treaty relief may depend on bringing the income into Singapore. Under Art. 22 of the Singapore–Switzerland Agreement, Switzerland reduces its tax under the Agreement — for example its withholding tax on dividends, interest or royalties — only on the amount remitted to or received in Singapore, where Singapore taxes that income by reference to remittance; this does not apply where Singapore exempts the income under Art. 23(1)(b). Keep evidence of the transfer to Singapore when you claim a Swiss refund.
Swiss lump-sum taxation (Pauschalbesteuerung) and the Singapore–Switzerland Agreement. Non-Swiss nationals moving to Switzerland for the first time (or after 10 years away) who do not work in Switzerland can, in most cantons, be taxed on their living expenses instead of income and wealth (federal minimum base CHF 434,700 for 2025, or seven times annual rent if higher). Zurich, Basel-Stadt, Schaffhausen and Appenzell Ausserrhoden do not offer it. Whether the Singapore–Switzerland Agreement treats a lump-sum taxpayer as a Swiss resident was not verified — take advice before choosing it, especially if Singapore may still treat you as resident.
Which Singapore–Switzerland treaty text applies. The Agreement signed at Singapore on 24 February 2011 applies; it has been in force since 1 August 2012, replaced the 1975 Convention and has not been amended. It is not on the IRAS list of agreements modified by the MLI, and the ESTV country page lists no MLI document. The tie-breaker is Art. 4(2); employment is Art. 15 (183 days in the calendar year); relief is Art. 23, with a remittance clause in Art. 22.
Cantonal and communal tax dominate. Swiss residence is determined by the same criteria for federal, cantonal and communal tax, but most of the income tax burden is cantonal and communal, and rates differ widely between cantons and municipalities.

How dual residence is resolved

If both countries treat you as a resident, Art. 4(2) of the treaty applies: Agreement between the Republic of Singapore and the Swiss Confederation for the avoidance of double taxation with respect to taxes on income (signed at Singapore on 24 February 2011), with Protocol (SR 0.672.968.91). The tests are applied in order — permanent home, centre of vital interests, habitual abode, nationality, and finally mutual agreement between the tax authorities.

The treaty in detail: income, rates, the 183-day rule →

Terms you will come across in Switzerland

Wohnsitz: tax domicile — staying with the intention of settling permanently
Aufenthalt: tax stay — 30 days with gainful activity or 90 days without
Quellensteuer: income tax withheld at source from salaries of foreign workers without a C permit
Besteuerung nach dem Aufwand: lump-sum taxation on living expenses for non-Swiss nationals without gainful activity
Staats- und Gemeindesteuern: cantonal and communal taxes — the bulk of Swiss income tax
Ansässigkeitsbescheinigung: certificate of Swiss tax residence

Questions

Can 30 days of work in Switzerland make me a Swiss resident?

Yes: an Aufenthalt of 30 days with gainful activity creates unlimited Swiss tax liability. If your only permanent home is in Singapore, Art. 4(2) of the Singapore–Switzerland Agreement makes you a Singapore resident for the treaty.

When does Switzerland tax my salary if Singapore is my treaty residence?

Under Art. 15(2), if you are in Switzerland more than 183 days in the calendar year, or the employer is Swiss-resident, or a Swiss permanent establishment bears the salary.

What is the remittance clause in Art. 22?

Swiss treaty reductions for income that Singapore taxes only when remitted apply only to the amount remitted to or received in Singapore, unless Singapore exempts the income under Art. 23(1)(b).

Sources

Legislation and official guidance

Art. 3 DBG (SR 642.11) — Unlimited tax liability applies to anyone with a Swiss tax domicile (Wohnsitz: staying with the intention of settling permanently) or tax stay (Aufenthalt): at least 30 days with gainful activity or 90 days without, regardless of temporary interruptions. A stay solely for study or medical treatment does not create residence.
Art. 3 StHG (SR 642.14) — Cantons and municipalities apply the same criteria (Wohnsitz; 30/90 days). Most of the income tax burden is cantonal and communal tax.
Art. 83, 89, 91 DBG — Foreign employees without a settlement permit (C permit) — e.g. holders of B or L permits — who have Wohnsitz or Aufenthalt in Switzerland pay tax withheld at source (Quellensteuer). With gross income of CHF 120,000 or more, or income not subject to withholding, an ordinary assessment follows.
Art. 15(2) of the Singapore–Switzerland Agreement — Remuneration of a resident of one State for employment exercised in the other State is taxable only in the first State if (a) the recipient is present in the other State for not more than 183 days in the calendar year concerned, (b) the remuneration is paid by, or on behalf of, an employer who is not a resident of the other State, and (c) it is not borne by a permanent establishment or fixed base which the employer has in the other State.
IRAS — «Working out my tax residency» (updated 12 May 2026) — A Singapore citizen or permanent resident who normally resides in Singapore, except for temporary absences, is a tax resident. A foreigner is resident for a year of assessment if, in the preceding calendar year, he or she stayed or worked in Singapore for at least 183 days, or stays or works in Singapore continuously for three consecutive years (then for all three years, even with fewer than 183 days in the first and third). A foreign employee whose employment spans two calendar years is resident for both years if the period of employment, together with the stay immediately before and after it, is a continuous period of at least 183 days (not for company directors, public entertainers and professionals). Days include weekends and public holidays, and temporary absences (leave abroad, business trips) connected with the employment in Singapore.
Art. 4(2) of the Singapore–Switzerland Agreement — Dual-resident individual: (a) resident of the State in which he has a permanent home available to him; if he has a permanent home in both States, of the State with which his personal and economic relations are closer (centre of vital interests); (b) if the centre of vital interests cannot be determined, or he has no permanent home in either State, of the State in which he has an habitual abode; (c) habitual abode in both States or in neither — the State of which he is a national; (d) in any other case, the competent authorities settle the question by mutual agreement.
Art. 8, 40 DBG — Liability begins on the day Wohnsitz or Aufenthalt is acquired and ends on departure; in a partial year only income for that period is taxed (pro rata).
ITA 1947, s. 2(1) («resident in Singapore»), 62(4)–(5), 73(1); IRAS — «Working out my tax residency» (updated 12 May 2026) — Status is set for the whole calendar year and applies to the following Year of Assessment. A foreigner arriving is resident for that year with 183 days of presence or employment, or under the two-year or three-year administrative rules; a holder of a work pass valid for at least one year is provisionally treated as resident, and the status is reviewed at tax clearance. A person chargeable to tax notifies IRAS within one month of arrival.
ESTV, Circular No. 45 (12.06.2019) — Tax at source is withheld only by a payer with its seat or a permanent establishment in Switzerland; where there is no such payer, nothing is withheld and the income is taxed by ordinary assessment (sections 2.2.1, 3.2.1).
Art. 4, 9, 10 QStV (SR 642.118.2) — Salary from an employer not resident in Switzerland is taxed by ordinary assessment, not at source, unless a Swiss permanent establishment bears it (Art. 4). Ordinary assessment is mandatory from CHF 120,000 of income (Art. 9); below that it can be requested by 31 March of the following year, irrevocably (Art. 10).
Art. 23 of the Singapore–Switzerland Agreement — Singapore (Art. 23(1)): (a) credit for Swiss tax against Singapore tax, subject to Singapore law; (b) exemption of income received from outside Singapore where the conditions of the Income Tax Act are met. Switzerland (Art. 23(2)): (a) income which may be taxed in Singapore is exempt, but may be taken into account for the rate on the remaining income; (b) for dividends, interest and royalties taxable in Singapore, relief on request — a credit limited to the Swiss tax, a lump-sum reduction of Swiss tax or a partial exemption.
s. 10(1) ITA 1947 — Income tax is payable on the income of any person accruing in or derived from Singapore or received in Singapore from outside Singapore — including gains or profits from any trade, business, profession or vocation, from any employment, dividends, interest, rents, royalties and pensions.
s. 13(7A) ITA 1947 — Exempt is income from sources outside Singapore received in Singapore: (a) by a non-resident individual; (b) from 1 January 2004 — by a resident individual, where the Comptroller is satisfied that the exemption is beneficial to him or her; the exemption does not cover such income received through a partnership in Singapore.
IRAS — «Claiming foreign tax credit» — Where foreign income is taxable in Singapore and foreign tax has been paid on it, a resident can claim a foreign tax credit in the return; the credit is the lower of the foreign tax paid and the Singapore tax payable on that income.
Art. 22 of the Singapore–Switzerland Agreement — Limitation of relief (remittance clause): reductions of Swiss tax under the Agreement for income that Singapore taxes by reference to the amount remitted to or received in Singapore apply only to the amount so remitted or received, unless Singapore exempts the income under Art. 23(1)(b).
Art. 14 DBG; ESTV Steuermäppchen 2025 «Besteuerung nach dem Aufwand» — Lump-sum taxation (taxation according to expenditure) is available only to persons who are not Swiss citizens, become subject to unlimited Swiss tax liability for the first time or after at least ten years' absence, and have no gainful activity in Switzerland (spouses must both qualify). Federal minimum base for 2025: CHF 434,700 or seven times the annual rent/rental value, whichever is higher; a control calculation applies. Zurich, Basel-Stadt, Schaffhausen and Appenzell Ausserrhoden do not offer it; Basel-Landschaft only transitionally. Where a treaty requires it, the base is extended to treaty-state income (Art. 14(5) DBG).
ESTV — country page Singapore (agreement, protocol, competent-authority agreement) — Double taxation agreement with Singapore signed on 24 February 2011, in force since 1 August 2012 (SR 0.672.968.91); competent-authority agreement of 29 May 2012 on the Protocol. No amending protocol and no MLI document are listed.
Art. 4(2)(a) of the Singapore–Switzerland Agreement — A dual-resident individual is deemed to be a resident only of the State in which he has a permanent home available to him; if he has a permanent home available in both States, of the State with which his personal and economic relations are closer (centre of vital interests).
SR 0.672.968.91 — Abkommen zwischen der Schweizerischen Eidgenossenschaft und der Republik Singapur zur Vermeidung der Doppelbesteuerung auf dem Gebiete der Steuern vom Einkommen — Swiss official publication of the Agreement (German text, equally authentic with English); ESTV lists it as signed 24.02.2011, in force 01.08.2012, without an amending protocol or MLI modification.
Art. 4(2)(b) of the Singapore–Switzerland Agreement — If the State of the centre of vital interests cannot be determined, or if he has no permanent home available in either State, he is deemed to be a resident only of the State in which he has an habitual abode.
Art. 4(2)(c), (d) of the Singapore–Switzerland Agreement — If he has an habitual abode in both States or in neither, he is deemed to be a resident only of the State of which he is a national (c); in any other case the competent authorities settle the question by mutual agreement (d).

Case law

Federal Supreme Court of Switzerland (Bundesgericht), 2C_480/2019, 12/02/2020 — Tax domicile (Wohnsitz) is where a person stays with the intention of remaining permanently and which has become the centre of their life interests; a flat abroad without evidence of actual living there and a postal address do not prove a move of that centre; Wohnsitz normally requires a horizon of at least one year.
Federal Supreme Court of Switzerland (Bundesgericht), 9C_496/2023 (BGE 150 II 244), 29/02/2024 — A transfer of Wohnsitz is recognised if, overall, the ties to the new place are more important, even if a Swiss home is kept. Wohnsitz normally requires an intended stay of at least one year, and an intention to move on later does not exclude it. In international cases the family's place of residence does not automatically prevail.
Federal Supreme Court of Switzerland (Bundesgericht), 9C_702/2024, 13/01/2026 — Tax domicile follows the objective centre of life interests, not registration: a room without a signed lease, rent paid in cash and no evidence of moving while the former home is kept point to a fictitious residence; refusal to produce documents may be held against the taxpayer. (Inter-cantonal dispute; same criteria as Art. 3 DBG.)
Federal Supreme Court of Switzerland (Bundesgericht), 2C_398/2021, 23/12/2021 — Married taxpayers normally have their Wohnsitz at the place of the joint family home (Familienort).
Federal Supreme Court of Switzerland (Bundesgericht), 2C_186/2020, 28/12/2020 — The tax stay (Aufenthalt) ended on departure, so liability applied pro rata for part of the year, not for the whole year.

Updated 10/11/2026. The result is for information only and is not tax or legal advice. IRAS, other tax authorities and courts may interpret the rules differently, including because of circumstances not covered here, and the law can change with each annual Budget. Consult a qualified adviser before making decisions.

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