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	Montenegro Europe	Spain Europe	Poland Europe	Argentina Latin America
Overview	Montenegro is a non-EU European country with structured residency routes, EU candidate status, and a growing role as a base for founders and remote workers in the region. Bordercase coordinates with licensed Montenegrin partners.	Spain offers structured EU residency routes for individuals, families, and entrepreneurs, including the digital nomad visa introduced under the Startups Law. Bordercase coordinates with licensed Spanish partners for filings.	Poland is a large EU economy with structured routes for skilled workers, founders, and remote professionals - and a growing role as a regional hub for Eastern European operations. Bordercase coordinates with licensed Polish partners for filings.	Argentina is a major South American economy with structured residency routes and a competitive cost of living for international founders and families. Bordercase coordinates with licensed Argentine partners for filings.
Best for	Cost of living Coastal living Regional residency	Families Remote workers EU access Cost of living	Founders Skilled workers EU access Cost-effective hub	Latin America hub Cost of living Founders Families
Currency	EUR	EUR	PLN	ARS
Language	Montenegrin / Serbian	Spanish	Polish	Spanish
Time zone	UTC+1	UTC+1	UTC+1	UTC-3
EU member	No	Yes	Yes	No
Schengen	No	Yes	Yes	No
Residency	Montenegrin residency routes: Temporary residence via employment Business / self-employment Real-estate ownership Family reunification Permanent residence typically after 5 years.	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 EU citizen-derivative routes The Golden Visa has been phased out for real estate purchases.	Polish residency routes: Blue Card - high-skilled employees Temporary residence via employment Self-employment / entrepreneur routes Family reunification EU citizen-derivative routes Permanent residence typically after 5 years.	Argentine residency routes: Rentista visa - passive income / pension Investor visa - qualifying investment in an Argentine business Worker visa - employer-sponsored Family routes - spouse, children, parents MERCOSUR fast-track for nationals of member states
Company setup	DOO (limited liability) is the standard structure. Formation is well-documented and reasonably fast. Tax and VAT registration follow.	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.	Sp. z o.o. (limited liability) is the standard private entity. Online formation via S24 is possible; otherwise notary registration. Tax registration, VAT, and ZUS (social contributions) follow. CIT and the new estonian-style lump-sum CIT regime may apply.	SA (Sociedad Anónima) and SRL (Sociedad de Responsabilidad Limitada) are the standard structures. CUIT, IGJ registration, and AFIP tax registration follow.
Banking	Personal banking for residents is accessible. Corporate banking depends on activity. Bordercase coordinates introductions where useful.	Personal banking for residents is straightforward; corporate banking depends on activity and structure. Bordercase coordinates introductions for non-standard cases.	Personal and corporate banking for residents is widely accessible. Non-resident structures take longer; documentation must be tight. Bordercase coordinates introductions where useful.	Residency unlocks personal banking. Forex controls and currency volatility are part of the landscape; multi-jurisdiction structuring is common.
Family	Family inclusion on residency applications is supported. International schools are available in Podgorica and on the coast.	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.	Family reunification is supported on most residency routes. International schools (English, German, French) are concentrated in Warsaw, Kraków, and Wrocław.	Family reunification is supported on most routes. Schools (public, private, English, German, French) are widely available in Buenos Aires.
Risks	Risks Bordercase watches for in Montenegro: Tax residency triggers EU accession dynamics may change rules over time Processing variations between municipalities Schengen entry / exit considerations for travel planning	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	Risks Bordercase watches for in Poland: Long visa processing in some voivodeships CIT and ZUS planning often gets done late Centre-of-interests analysis for tax residency Estonian-style lump-sum CIT regime eligibility	Risks Bordercase watches for in Argentina: Currency / forex controls Tax residency triggers Document apostille + Spanish translation requirements
Documents	Typical Montenegrin residency documents: Passport Criminal record certificate Proof of accommodation Basis for residence Health insurance Family certificates Apostilled and translated.	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	Typical Polish residency documents: Passport Criminal record certificate Proof of address Employment contract or business plan Health insurance Marriage / birth certificates for family Apostilled and translated to Polish.	Typical Argentine documents: Passport Criminal record certificate (apostilled) Marriage / birth certificates for family Proof of income or investment Health insurance

Country pages stay the authoritative source. This view is a side-by-side; nothing here promises a particular outcome.

Countries

Europe

Europe

Europe

Latin America

Overview

Montenegro is a non-EU European country with structured residency routes, EU candidate status, and a growing role as a base for founders and remote workers in the region. Bordercase coordinates with licensed Montenegrin partners.

Spain offers structured EU residency routes for individuals, families, and entrepreneurs, including the digital nomad visa introduced under the Startups Law. Bordercase coordinates with licensed Spanish partners for filings.

Poland is a large EU economy with structured routes for skilled workers, founders, and remote professionals - and a growing role as a regional hub for Eastern European operations. Bordercase coordinates with licensed Polish partners for filings.

Argentina is a major South American economy with structured residency routes and a competitive cost of living for international founders and families. Bordercase coordinates with licensed Argentine partners for filings.

Best for

Cost of living
Coastal living
Regional residency

Families
Remote workers
EU access
Cost of living

Founders
Skilled workers
EU access
Cost-effective hub

Latin America hub
Cost of living
Founders
Families

Currency

EUR

PLN

ARS

Language

Montenegrin / Serbian

Spanish

Polish

Spanish

Time zone

UTC+1

UTC-3

EU member

Yes

Schengen

Yes

Residency

Montenegrin residency routes:

Temporary residence via employment
Business / self-employment
Real-estate ownership
Family reunification

Permanent residence typically after 5 years.

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
EU citizen-derivative routes

The Golden Visa has been phased out for real estate purchases.

Polish residency routes:

Blue Card - high-skilled employees
Temporary residence via employment
Self-employment / entrepreneur routes
Family reunification
EU citizen-derivative routes

Permanent residence typically after 5 years.

Argentine residency routes:

Rentista visa - passive income / pension
Investor visa - qualifying investment in an Argentine business
Worker visa - employer-sponsored
Family routes - spouse, children, parents
MERCOSUR fast-track for nationals of member states

Company setup

DOO (limited liability) is the standard structure. Formation is well-documented and reasonably fast. Tax and VAT registration follow.

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.

Sp. z o.o. (limited liability) is the standard private entity. Online formation via S24 is possible; otherwise notary registration. Tax registration, VAT, and ZUS (social contributions) follow. CIT and the new estonian-style lump-sum CIT regime may apply.

SA (Sociedad Anónima) and SRL (Sociedad de Responsabilidad Limitada) are the standard structures. CUIT, IGJ registration, and AFIP tax registration follow.

Banking

Personal banking for residents is accessible. Corporate banking depends on activity. Bordercase coordinates introductions where useful.

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

Personal and corporate banking for residents is widely accessible. Non-resident structures take longer; documentation must be tight. Bordercase coordinates introductions where useful.

Residency unlocks personal banking. Forex controls and currency volatility are part of the landscape; multi-jurisdiction structuring is common.

Family

Family inclusion on residency applications is supported. International schools are available in Podgorica and on the coast.

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.

Family reunification is supported on most residency routes. International schools (English, German, French) are concentrated in Warsaw, Kraków, and Wrocław.

Family reunification is supported on most routes. Schools (public, private, English, German, French) are widely available in Buenos Aires.

Risks

Risks Bordercase watches for in Montenegro:

Tax residency triggers
EU accession dynamics may change rules over time
Processing variations between municipalities
Schengen entry / exit considerations for travel planning

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

Risks Bordercase watches for in Poland:

Long visa processing in some voivodeships
CIT and ZUS planning often gets done late
Centre-of-interests analysis for tax residency
Estonian-style lump-sum CIT regime eligibility

Risks Bordercase watches for in Argentina:

Currency / forex controls
Tax residency triggers
Document apostille + Spanish translation requirements

Documents

Typical Montenegrin residency documents:

Passport
Criminal record certificate
Proof of accommodation
Basis for residence
Health insurance
Family certificates

Apostilled and translated.

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

Typical Polish residency documents:

Passport
Criminal record certificate
Proof of address
Employment contract or business plan
Health insurance
Marriage / birth certificates for family

Apostilled and translated to Polish.

Typical Argentine documents:

Passport
Criminal record certificate (apostilled)
Marriage / birth certificates for family
Proof of income or investment
Health insurance