Compare jurisdictions, side by side.

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.

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.

Common Portuguese residency routes:

• D7 - passive income / pension
• D8 - digital nomad / remote work
• D2 - entrepreneur / self-employed
• D3 - highly qualified workers
• Tech Visa - eligible tech roles via accredited companies
• Golden Visa - restricted in scope after recent reforms
• Family reunification on most permits

Each has different income, residency-day, and renewal requirements.

Spanish residency routes:

• Non-Lucrative Visa - passive income, no employment in Spain
• Digital Nomad Visa - remote workers and self-employed (Startups Law)
• Self-Employed Visa
• Entrepreneur Visa

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.

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.

Portugal supports Lda (private limited) and SA (public limited) structures. Tax registration, social security registration, and a Portuguese tax representative are typically required. Substance, accounting, and reporting obligations are real.

SL (Sociedad Limitada) is the standard private company. Registration involves NIE / NIF, notary, mercantile registry, and tax registration. Spanish tax residency triggers worldwide income reporting; the Beckham Law (special tax regime) may apply to eligible relocated workers.

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.

Personal accounts are accessible to residents and many non-residents; documentation is structured and predictable. Corporate banking depends on company structure and intended activity; Bordercase coordinates with banking partners for introductions.

Personal banking for residents is straightforward; corporate banking depends on activity and structure. Bordercase coordinates introductions for non-standard cases.

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. International schools (English, French, Russian) are available in Belgrade.

Family reunification is supported on most residency routes. Schools (public, private, and international) are widely available; the public system is generally accessible to legal residents.

Family reunification is supported on most residency routes after a qualifying period. Schools (public, private, international) are widely available; the public system is generally accessible to legal residents.

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 Serbia:

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

Risks Bordercase watches for in Portuguese cases:

• AIMA processing delays (formerly SEF)
• Misalignment between visa type and actual activity
• Tax residence triggered by accident - NHR window timing matters
• Past EU Schengen overstays must be disclosed
• Real estate vs investment routes have changed materially

Risks Bordercase watches for in Spain:

• Tax residency triggers - 183 days + centre of interests
• Beckham Law (special regime) eligibility
• Autonomous-community tax variation
• Hacienda audits when planning is unclear
• Past Schengen overstays must be disclosed

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 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.

Typical document pack for Portuguese residency:

• Passport
• NIF (Portuguese tax number)
• Proof of accommodation (lease, deed, or invitation)
• Proof of income or assets (varies by route)
• Criminal record certificate with apostille
• Health insurance valid in Portugal
• Marriage / birth certificates for family routes
• Certified translations where required

Typical Spanish residency documents:

• Passport
• NIE (foreigner identification number)
• Criminal record certificate with apostille
• Proof of income / assets
• Health insurance with full cover in Spain
• Accommodation evidence
• Marriage / birth certificates for family routes