1. What is Lex Koller?
Lex Koller is the colloquial name for Switzerland's Federal Act on the Acquisition of Real Estate by Persons Abroad (German: Bundesgesetz über den Erwerb von Grundstücken durch Personen im Ausland, BewG). The current law has been in force since 1997 and replaced the earlier Lex Friedrich (1985-1997).
The law governs which foreigners may purchase real estate in Switzerland and under what conditions. It exists to balance Switzerland's interest in welcoming international wealth with the need to protect domestic property markets from speculative foreign capital.
"Lex Koller is not a barrier — it is a structured authorization framework. Properly navigated, it offers international HNWIs predictable access to Switzerland's premium property market, especially in resort communities."
Why Lex Koller matters for international buyers
For UK Brexit-refugees, US tax-optimization migrants, MENA wealth-preservation seekers, and Asian family-office relocators, Lex Koller is typically the second-most-important regulatory framework after lump-sum taxation. Together, they shape the entire migration roadmap.
What Lex Koller covers — and what it does not
- Covered: Direct ownership of land, buildings, condominiums by individuals or legal entities domiciled abroad
- Covered: Indirect ownership through Swiss companies if a foreign person controls them
- Not covered: Hotel acquisitions, commercial real estate (factories, offices) acquired for own business use
- Not covered: Real-estate funds and REITs (collective investment vehicles)
- Not covered: Inheritance to direct heirs (separate inheritance rules apply)
2. Historical context and current legal basis
Switzerland began regulating foreign real-estate purchases in 1961. The current Lex Koller framework consolidates rules around three core principles:
- Reciprocity: Swiss citizens should not face stricter rules abroad than foreigners face in Switzerland
- Domestic-market protection: Foreign capital should not destabilize local housing markets
- Strategic openness: Switzerland should remain attractive to international wealth (lump-sum taxation, banking, education)
Key statutory references
- Federal Act on Acquisition of Real Estate by Persons Abroad (BewG) — main law
- Ordinance on Acquisition of Real Estate by Persons Abroad (BewV) — implementing rules
- Cantonal implementing legislation — practice and quota administration
- Federal Office of Justice (Bundesamt für Justiz) — federal oversight
Recent developments
- 2014: Swiss voters rejected initiative to abolish lump-sum taxation (59.2% no) — confirming international-friendly regulatory stance
- 2020-2024: Resort canton quotas became increasingly tight. Verbier, Zermatt, St. Moritz quotas often exhausted within first 6 months of year
- 2025-2026: Brexit + UK Non-Dom abolition triggered surge in UK-citizen Lex Koller applications
- 2026 status: VS/GR/BE resort quotas at >90% utilization. Off-market mediation increasingly the norm.
3. Buyer categories: who needs what?
Lex Koller treatment depends on nationality, residence status, and purpose of acquisition. Three primary categories:
Category A: Swiss citizens or persons treated as such
No Lex Koller restrictions. Includes:
- Swiss nationals (including dual nationals)
- Foreigners with Swiss C permit (settled status, typically 5+ years residence)
- Foreigners with B permit AND Swiss residence using property as primary residence
Category B: EU/EFTA citizens with Swiss residence
Generally treated similarly to Swiss citizens for primary residence. Investment properties (e.g., Mehrfamilienhäuser, secondary homes outside resort areas) may still trigger Lex Koller review.
- EU/EFTA + B permit + primary residence: No Lex Koller authorization needed
- EU/EFTA + B permit + investment property: Authorization may be required depending on canton
- EU/EFTA without Swiss residence: Treated similarly to third-country nationals
Category C: Third-country nationals (UK, US, MENA, Asia)
Most restrictive category. Authorization typically required for any property purchase. Pathways:
C1: Third-country with Swiss B permit (financially independent)
Possible to purchase a primary residence without Lex Koller authorization, as long as actually used as primary residence. Often combined with lump-sum taxation arrangement.
C2: Third-country with C permit (settled status, 10+ years residence)
No Lex Koller restrictions. But achieving C permit takes ~10 years for third-country nationals.
C3: Third-country without Swiss residence
Must obtain Lex Koller authorization. Possible categories:
- Vacation home in resort community (most common pathway) — requires available quota
- Family inheritance — separate inheritance rules
- Diplomatic exemption — for accredited diplomats
- Hotel acquisition — for hotel operators (Lex Koller exempt)
Categorization decision matrix
| Buyer profile | Primary residence | Resort vacation home | Investment property |
|---|---|---|---|
| Swiss / C permit | Free | Free | Free |
| EU/EFTA + B permit | Free (if used as primary) | Authorization typically needed | Authorization required |
| EU/EFTA without residence | Authorization required | Authorization required (resort quota) | Highly restricted |
| Third-country + B permit | Free (if used as primary) | Authorization needed | Highly restricted |
| Third-country without residence | Not possible without permit | Authorization required (resort quota only) | Generally not permitted |
4. Resort cantons and quota mechanics
Switzerland operates an annual quota system for foreign vacation-home purchases in designated resort communities. Total federal quota is approximately 1'500 units per year, distributed among cantons based on tourism criteria.
Top resort cantons and communities
Valais (VS) — Largest quota share
- Verbier (Bagnes): Premium ski resort, top international clientele (UK, NL, FR, US). 2026 quota largely exhausted by Q2.
- Crans-Montana: Plateau resort with international school (Le Régent), favored by UK families and forfait fiscale clientele.
- Zermatt: Iconic Matterhorn-facing car-free resort. High demand, very limited new-build quota.
- Saas-Fee: Glacier village, smaller but accessible quota.
Graubünden (GR) — Second-largest quota share
- St. Moritz: Engadin's most exclusive resort. Premium prices CHF 35-60k/m² in Suvretta micro-location. 2026 quota at ~85% utilization.
- Davos: WEF host, larger but still constrained quota.
- Klosters-Serneus: Adjacent to Davos, with a traditionally strong British clientele.
- Lenzerheide: Family-oriented alternative to St. Moritz, more accessible quota.
- Arosa: Smaller quota, exclusive character.
Bern (BE) — Saanenland
- Saanen/Gstaad: International family-office cluster. Le Rosey winter campus drives family demand. ~80% quota utilization 2026.
Vaud (VD), Lucerne (LU), Other cantons
Smaller resort quotas in Villars, Verbier-extended areas, and similar. Less utilized than VS/GR/BE top resorts.
Quota mechanics — how it actually works
The annual quota cycle
January
Federal Office of Justice releases annual quota allocation per canton based on previous year's utilization and tourism statistics.
February-April
Cantonal authorities receive applications. Premium resort applications (Verbier, Zermatt, St. Moritz, Gstaad) typically already constitute 60-70% of expected utilization in this window.
May-September
Top resort quotas reach ~80-90% utilization. Mid-tier cantons (Lenzerheide, Saas-Fee) still have availability. Off-market mediation becomes essential.
October-December
Top resort quotas exhausted. Applicants receive declines or wait-list status. Many push applications to following year.
Strategic implications for buyers
- Plan 12-24 months ahead: for premium resort purchases (Verbier, Zermatt, St. Moritz, Gstaad-area)
- Off-market is increasingly common: public listings rarely yield premium properties; a discreet search beyond public listings can help
- Consider mid-tier resorts: Lenzerheide, Crans-Montana, Saas-Fee offer more accessible quotas with still-excellent skiing and HNWI character
- Combine with lump-sum taxation: often simplifies the residence-permit pathway and the property purchase
5. Authorization process step-by-step
For third-country nationals seeking resort property, the typical authorization timeline is 6-18 months. Here's the structured process:
Lex Koller authorization process for third-country nationals
Pre-qualification (months 1-2)
Engage a Swiss real-estate advisor and tax/legal counsel. Identify target canton/community based on lifestyle preferences, lump-sum taxation strategy, and quota availability. Pre-qualification typically includes an NDA and verification of financial means.
Property identification (months 2-6)
Property search, also beyond public listings. Public listings considered as backup. Property visits arranged discreetly. Preliminary purchase agreement (subject to Lex Koller) negotiated.
Application preparation (months 4-7)
Swiss notary or attorney prepares formal Lex Koller application. Documents required: passport, proof of nationality, proof of financial means, property details, intended use declaration. Cantonal-specific requirements may apply.
Cantonal review (months 6-10)
Cantonal authority reviews application. Quota availability check is performed first; if exhausted, application is queued for next year. Substantive review covers buyer credentials, intended use, and compliance with cantonal residence rules.
Federal validation (months 8-12)
Federal Office of Justice may review cantonal decision (especially for borderline cases). Federal review can extend timeline by 3-6 months.
Authorization + Closing (months 10-18)
Once authorized, formal sales contract is signed with notary. Property registration (Grundbuch) typically completes within 30-60 days. Possession transfer follows.
6. Combination with lump-sum taxation
For most third-country HNWIs, the optimal strategy combines Lex Koller authorization + Swiss residence + lump-sum taxation. The three elements interact strategically:
The integrated migration roadmap
| Element | Purpose | Timing |
|---|---|---|
| Lump-sum taxation pre-ruling | Tax certainty for life in Switzerland | Months 1-3 before move |
| B permit (financial independence) | Right to reside in Switzerland | Months 3-6 before move |
| Lex Koller authorization | Right to purchase resort property | Months 6-18 before purchase |
| Property acquisition | Primary residence + lifestyle anchor | Months 12-18 before move |
| Actual relocation | Establish Swiss tax residence | Year 1 of new residence |
Cantonal preferences for combined strategy
- Valais (VS): Lump-sum + Lex Koller resort (Verbier, Crans-Montana, Zermatt). Highest combined attractiveness for UK/US clients.
- Graubünden (GR): Lump-sum + Lex Koller resort (St. Moritz, Davos, Klosters). Premium MENA + Asian clientele.
- Vaud (VD): Lump-sum + Lavaux/Vevey-Montreux for non-resort property. Historical home of lump-sum taxation since 1862.
- Bern (BE): Lump-sum + Saanen/Gstaad resort. International family-office cluster.
- Ticino (TI): Lump-sum + Lugano/Ascona/Locarno. Italian-language clientele.
7. Exceptions and special cases
Inheritance from Swiss owner
If a non-resident foreigner inherits Swiss real estate from a Swiss owner (or another foreign owner who held legitimate authorization), Lex Koller does not apply at the moment of inheritance. The heir may keep the property indefinitely. However, if the heir later wishes to sell, they cannot acquire similar property afterward without going through standard Lex Koller process.
Marriage to Swiss / EU resident
Spouse of a Swiss citizen or EU/EFTA-resident with B/C permit benefits from spouse's status. Acquiring property in Switzerland under spouse's name circumvents Lex Koller for primary residence.
Diplomatic and consular staff
Accredited diplomats, UN staff, and consular personnel benefit from special status. Property acquisitions for personal use during posting are typically exempt from Lex Koller. After end of posting, status changes to standard third-country rules.
Charitable foundations
Swiss-based charitable foundations may acquire real estate for charitable purposes (museums, cultural institutions) without standard Lex Koller restrictions, subject to registration and oversight.
Hotel and restaurant business operations
Foreigners operating Swiss hotels or restaurants may acquire associated real estate as part of business operations. Subject to operational use requirements; speculative acquisitions disallowed.
8. Illustrative example scenarios (fictitious)
Example scenario (fictitious): The following scenarios are invented and only illustrate typical questions. People, families, companies, properties, figures and timelines are made up – not a real client engagement or transaction. Whether an authorization can be obtained must always be clarified with the competent cantonal authority; amounts are illustrative, not tax or legal advice.
James M. (fictitious) — Crans-Montana purchase combined with lump-sum taxation
Background: Brexit and the UK Non-Dom changes motivate a relocation. Crans-Montana offers an international school, plateau lifestyle and lump-sum taxation in Valais.
Typical process in this scenario (typical time frame approx. 12–18 months, illustrative): an advance ruling on lump-sum taxation in Valais would be prepared by tax specialists; whether a Lex Koller authorization for a chalet in Plans-Mayens (illustrative order of magnitude CHF 12–16M) is possible would need to be clarified with the cantonal authority.
Possible outcome in this scenario (illustrative): the family could relocate to Switzerland. Any tax advantage over the UK depends on the individual ruling – simplified model, not tax advice.
Maria F. (fictitious) — Lugano-Castagnola purchase linked to a change of tax residence
Background: changes in Italian taxation prompt a change of tax residence. Ticino offers Italian-language services, proximity to Milan and lump-sum taxation.
Typical process in this scenario (typical time frame approx. 9–12 months, illustrative): as an EU/EFTA citizen with a B permit used as primary residence, the Lex Koller situation is usually simpler – this would still need to be confirmed in advance. Property search in Castagnola, also beyond public listings (illustrative order of magnitude CHF 10–12M).
Possible outcome in this scenario (illustrative): a smooth transition to Lugano. The lump-sum tax base in Ticino would be set by the tax authority – simplified model, not tax advice.
Karim A. (fictitious) — St. Moritz Suvretta purchase
Background: family safety and stability motivate a Swiss anchor. The Suvretta micro-location in St. Moritz is the target; resort quotas in Graubünden are tight.
Typical process in this scenario (typical time frame approx. 18–24 months, illustrative): search for a private chalet in Suvretta, also beyond public listings (illustrative order of magnitude CHF 30–40M). A possible Liechtenstein foundation structure and the Lex Koller requirements would need to be assessed by a law firm and clarified with the cantonal authority.
Possible outcome in this scenario (illustrative): if the authority approved the application, the family could acquire the property via an approved structure and prepare lump-sum taxation in parallel.
9. Common mistakes to avoid
Mistake 1: Underestimating timeline
Many international buyers approach Switzerland expecting weeks or months. Reality: 12-24 months for premium resort purchases by third-country nationals. Plan well ahead.
Mistake 2: Signing binding agreement before Lex Koller authorization
Always insert "subject to Lex Koller authorization" clauses in preliminary agreements. Binding signature without confirmed authorization risks contract nullity.
Mistake 3: Misrepresenting intended use
Stating "primary residence" when actual use is investment-only is a serious offense. Cantonal authorities verify usage post-purchase. Always declare actual use accurately.
Mistake 4: Ignoring quota seasonality
Applying for VS or GR resort property in Q4 is typically too late. Plan applications for Q1-Q2 of target year.
Mistake 5: Trying to circumvent through Swiss company
Establishing a Swiss company controlled by foreign persons does not avoid Lex Koller. Indirect foreign control triggers same authorization requirements.
Mistake 6: Generic legal counsel
Lex Koller is highly specialized. Generic Swiss attorneys may miss nuances. Always engage law firms with proven Lex Koller expertise.
Mistake 7: Assuming previous EU residence transfers
EU residence (e.g., German B permit, French B permit) does NOT confer Swiss residence rights. Swiss B permit must be obtained separately.
10. Frequently asked questions
- Can a US citizen buy a primary residence in Switzerland?
- Yes, with appropriate B residence permit (often based on financial independence). Lump-sum taxation arrangement frequently accompanies. Resort vacation homes possible only via Lex Koller authorization with available quota.
- What does a typical advisory engagement look like?
- Typically three components: (1) Pre-qualification + Lex Koller pathway analysis, (2) Property search, also beyond public listings, (3) Closing coordination with notary, lawyer, tax counsel. Typical time frame 6-18 months.
- Can Brexit-affected UK citizens benefit?
- Yes, increasingly so. UK Non-Dom abolition (2025) drove surge in UK-citizen Lex Koller applications. Combined with Swiss lump-sum taxation, total tax burden often substantially below UK exposure.
- What is the cost of Lex Koller authorization?
- Cantonal fees typically CHF 1'000-5'000. Legal counsel CHF 15-50k for simple cases, higher for complex structuring. Notary fees additional.
- How does Lex Koller affect inheritance planning?
- Inheritance from current Swiss owner does not trigger Lex Koller. Beneficiaries inherit existing authorization status. However, if they later wish to acquire additional property, standard rules apply.
- Can I rent out my Lex Koller-authorized property?
- Permitted with authorization conditions. Typically required: actual personal use during defined periods (e.g., 4-6 weeks/year). Pure investment rentals to third parties may breach use conditions.
- What if my application is denied?
- Cantonal denials can be appealed to federal authorities. Common reasons for denial: quota exhausted (try next year), documentation incomplete, intended use unclear. Appeals are handled by specialized legal counsel.
- How does Lex Koller compare to other countries' rules?
- Switzerland is restrictive vs. Spain, France, Italy (no general restrictions). More open than e.g., Norway, Denmark for non-EU residents. UK had no such law historically. Lex Koller is moderate in international context.
11. 2027 Outlook
Beherzig's assessment of Lex Koller dynamics in 2027 (not a forecast based on official data):
- Continued UK migration: the impact of the UK Non-Dom changes could peak in 2026-2028, with additional UK applications mainly in VS/GR resort cantons.
- US tax-reform pressure: Potential US estate-tax reforms could trigger US-citizen migration. Watch 2027 election cycle.
- Quota exhaustion accelerates: VS and GR resort quotas will likely fully exhaust within first 9 months of 2027. Off-market mediation will increasingly dominate.
- Mid-tier resort emergence: Lenzerheide, Saas-Fee, smaller Saanenland communities will gain international attention as primary resort quotas exhaust.
- Tokenization considerations: Blockchain-based fractional real-estate ownership remains restricted under current Lex Koller. Regulatory clarification expected 2027-2028.
- Swiss banking + Lex Koller integration: Swiss private banks increasingly offer integrated migration services combining banking + property + permit + tax counsel.