Methodology

Data pipeline

Visa and tax/cost data are loaded from versioned JSON artifacts generated on 2026-02-27 and 2026-02-27. Every country view exposes direct source URLs and retrieval dates.

Scoring formula

1. Hard constraints remove countries that violate mandatory questionnaire rules.
2. Each factor (Legal, Cost, Lifestyle, Tax, Mobility) is normalized to a 0-10 score.
3. Weighted factor score uses your slider distribution.
4. Disposable-income score is blended with weighted score, then adjusted by confidence.

Calculation assumptions

• Estimated net income = gross monthly income * (1 - (effective income tax + employee social contribution) / 100).
• Disposable income = estimated net income - monthly_cost_single_usd (or average tier fallback when available).
• Income requirements are only hard-checked when requirement currency is USD; non-USD requirements are flagged as uncertainty.
• No treaty effects, deductions, progressive brackets, employer contributions, or local special regimes are modeled.
• Missing tax, cost, or processing values reduce confidence and may use neutral scoring fallbacks.