Cross-border tax planning for expats in Switzerland
Once you are Swiss-resident, Switzerland taxes your worldwide income and wealth - foreign income is usually exempt with progression (counted only to set your Swiss rate) under the relevant double-tax treaty. Foreign property is taxed only where it sits, but added to the Swiss wealth-tax base for rate purposes.
Overview
Cross-border planning is about not paying twice and not missing a filing. Most expats keep some link to home (property, brokerage, pension, family). Each link needs a clear treaty answer and an annual reporting line in the Swiss return.
Coordinating Swiss and foreign tax
- 1
Map every cross-border item
Foreign property, bank/brokerage accounts, pensions, life insurance, employer stock, foreign rental income, royalties, alimony, trusts and foundations. List currency, country, value and income type for each.
- 2
Apply the right double-tax treaty
Switzerland has treaties with most countries. Common patterns: salary taxed where worked (some commuter exceptions), dividends with reduced withholding, real-estate income only in the property country, pensions usually only in the residence country.
- 3
Reclaim foreign withholding tax
Use treaty-rate forms (Form 5000/W-8BEN-E for US dividends, formulaires in EU countries) at the broker level; reclaim residual via the tax authority where the broker can't. The Swiss DA-1 form recovers excess withholding on foreign dividends.
- 4
Handle US citizenship separately
US persons are taxed by the IRS on worldwide income regardless of residence, must file 1040 + FBAR + FATCA forms annually, and face PFIC penalties on most non-US funds. Swiss planning that ignores this creates double tax.
- 5
Anticipate CRS information exchange
Switzerland exchanges account information with 100+ jurisdictions annually. Anything not declared is likely already known - voluntary disclosure programmes (Selbstanzeige) exist in many cantons for past omissions.
- 6
Plan succession across borders
Switzerland levies inheritance/gift tax at cantonal level (often 0% for spouses and children). Foreign assets follow the law of the asset's country - a will valid in one country may not work in another without a choice-of-law clause (PILA art. 90).
Frequently asked questions
Do I pay Swiss tax on foreign rental income?+
No, not directly - foreign real-estate income is taxed only in the country where the property sits under most treaties. It is, however, added to your Swiss income for rate-setting purposes (exemption with progression).
How does the DA-1 form work?+
DA-1 (Antrag auf pauschale Steueranrechnung) lets you credit foreign withholding tax on dividends and interest against your Swiss tax, up to the treaty rate. File it with your annual tax return.
Do I have to declare my foreign pension to Switzerland?+
Yes - foreign pension entitlements and lump-sum capital are reportable. Treatment depends on the treaty: many foreign pensions are taxed in Switzerland once you are resident, with treaty-defined exceptions for government pensions.
What if I keep my home-country brokerage?+
Generally fine, but: report it on the Swiss Wertschriftenverzeichnis, reclaim treaty-rate withholding, and check whether your broker will keep you as a non-resident client (some EU and US brokers close non-resident accounts).
Are inheritance taxes a worry?+
Switzerland is mostly mild (spouses and children often exempt), but cross-border estates can trigger tax in the foreign country and require a foreign probate. Plan a will with an explicit choice of law (PILA art. 90) to control which law applies.