Compare jurisdictions, side by side.

UK residency routes:

• Skilled Worker visa - employer-sponsored
• Innovator Founder visa - for endorsed founders
• Global Talent visa - for endorsed experts
• Self-Sponsorship via own company (with substance)
• Family routes - spouse / partner / dependents
• Ancestry visa for eligible Commonwealth nationals

Mexican residency routes:

• Temporary resident visa - via investment, employment, or qualifying income
• Permanent resident visa - via qualifying assets, retirement income, or after 4 years of temporary residency
• Family unity routes - for spouse and dependents of permanent residents / citizens
• Student visa

Permanent residency unlocks indefinite stay with work authorisation.

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.

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.

UK Limited companies are widely used internationally. HMRC corporation tax, VAT thresholds, and PSC (people with significant control) reporting apply. Substance expectations have tightened.

SA de CV (Sociedad Anónima) and S de RL de CV are the standard private entity types. Formation involves a notary, RFC (tax registration), and IMSS where staff are involved. Mexican tax residency is triggered by primary home and centre of economic interests.

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.

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.

Resident banking is mature but onboarding is slow for non-residents. Many international founders use UK EMIs (Revolut, Monzo Business, etc.) alongside high-street accounts. Bordercase coordinates introductions for cross-border cases.

Resident personal banking is broadly accessible; corporate banking depends on activity and structure. Source of funds and ownership clarity are central. Bordercase coordinates introductions for cross-border cases.

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 broadly accessible. Source-of-funds documentation matters for non-standard cases. Bordercase coordinates banking introductions.

Family reunification is supported. Schools (state, private, international) are widely available; competition for top schools is real.

Family reunification is supported on most residency routes. International schools (English, German, French, Japanese) are widely available in major cities; bilingual public and private schools are common.

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

Risks Bordercase watches for in the UK:

• Tax residency triggers (Statutory Residence Test)
• Sole-rep / Innovator endorsement standards have tightened
• Brexit-era operational variation between UK and EU services
• Sponsorship Compliance for licensed sponsors

Risks Bordercase watches for in Mexico:

• Centre-of-economic-interests test for tax residency
• Real-estate restrictions in the "restricted zone" (50 km from coast, 100 km from borders) - fideicomiso or Mexican company structure needed
• Income thresholds for temporary / permanent routes change with minimum wage indexation
• Late-stage RFC and CURP registrations

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 Bulgaria:

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

Typical UK documents:

• Passport
• Certificate of Sponsorship (for sponsored routes)
• TB test (for certain nationalities)
• Maintenance funds evidence
• Apostilled / certified documents for family routes

Typical Mexican documents:

• Passport
• Apostilled foreign documents (birth, marriage, criminal record)
• Proof of income or qualifying assets
• Photographs to specification
• Mexican consular application abroad for most routes

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 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.