Compare jurisdictions, side by side.

Swiss residency routes:

• Work permit - employer-sponsored, quota-controlled for non-EU
• Lump-sum taxation (forfait fiscal) - HNW individuals in eligible cantons
• Business / investor routes
• EU / EFTA routes - under FMP
• Family reunification

Serbian residency routes:

• Temporary residence via employment
• Self-employment / business
• Real-estate ownership
• Family reunification
• IT-focused residency framework

Permanent residence typically after 3 years of continuous temporary residence.

Estonian residency routes:

• Start-up visa - for founders of qualifying start-ups
• Digital nomad visa - for eligible remote workers
• Work permit - employer-sponsored
• Family routes - spouse / dependants

Note: e-Residency is NOT a residence permit - it is a digital identity for managing an Estonian company remotely.

Bulgarian residency routes:

• Employment-based residence
• Business / self-employment routes
• Retirement / pensioner residency
• Family reunification
• EU citizen-derivative routes

Permanent residence typically after 5 years.

GmbH and AG are the standard structures. Cantonal variation in tax, registration, and substance treatment is real. Federal and cantonal compliance is precise.

DOO (limited liability) is the standard structure. Formation is well-documented, with online steps available. Tax registration (PIB) and APR (Business Registers Agency) registration follow.

OÜ (private limited) is the standard structure, formed online via e-Residency or in person. Reporting obligations are real but proportionate; accounting partners are widely available.

OOD (LLC) and EOOD (single-shareholder LLC) are common structures. Formation is well-documented. Corporate tax is at a flat rate; VAT registration depends on activity.

Swiss banking has tightened materially since the 2010s. Personal accounts require residency or strong nexus; corporate banking requires substance and clear source of funds. Bordercase coordinates introductions through current partners.

Personal and corporate banking for residents is broadly accessible. Source-of-funds documentation matters for non-standard cases. Bordercase coordinates banking introductions.

Estonian banks have tightened KYC for non-resident e-residents; many international founders rely on EMIs (Wise, Revolut Business, Payoneer, etc.) for day-to-day banking. Local bank accounts typically require strong substance evidence.

Personal and corporate banking for residents is broadly accessible. Source-of-funds documentation matters for non-standard cases. Bordercase coordinates banking introductions.

Family reunification is supported on most permits. Schools (public, private, and international) are widely available; international schools are well-established but selective.

Family reunification is supported. International schools (English, French, Russian) are available in Belgrade.

Family relocation is supported on the work and start-up visa routes; schooling and healthcare access follow the main applicant's residency.

Family reunification is supported. Schools (public, private, English, German, French) are concentrated in Sofia, Plovdiv, and Varna.

Risks Bordercase watches for in Switzerland:

• Quotas for non-EU work permits
• Lump-sum taxation eligibility and cantonal variation
• Banking gatekeeping for non-residents
• Substance and arm's-length pricing audits

Risks Bordercase watches for in Serbia:

• Tax residency triggers
• VAT registration timing
• Processing variations between MUP offices
• EU Schengen access requires planning for cross-border travel

Common pitfalls Bordercase watches for:

• Confusing e-Residency with physical residency
• Banking-only setups without substance - likely flagged
• Crypto, gambling, and other regulated industries face additional friction
• Tax residence triggered by 183 days even without a residence permit

Risks Bordercase watches for in Bulgaria:

• Tax residency triggers
• VAT classification on cross-border services
• Processing variations between regions
• Euro adoption is in progress - operational planning needed

Typical Swiss residency documents:

• Passport
• Employment contract or business plan
• Criminal record certificate
• Proof of accommodation
• Health insurance valid in Switzerland
• Financial evidence

Apostilled and translated where required.

Typical Serbian residency documents:

• Passport
• Criminal record certificate
• Proof of address
• Basis for residence (employment, business, etc.)
• Health insurance
• Family certificates

Apostilled and translated to Serbian.

For e-Residency:

• Passport
• Application form
• Biometric collection at the chosen Estonian embassy or pickup point

For physical residency:

• Passport
• Criminal record certificate
• Proof of income
• Accommodation evidence
• Health insurance
• Business plan (start-up visa)

Typical Bulgarian residency documents:

• Passport
• Criminal record certificate
• Proof of address
• Basis for residence (employment, business, etc.)
• Health insurance
• Family certificates

Apostilled and translated to Bulgarian.