Cost of living varies dramatically between cities — a salary of $80,000 in Austin, Texas provides roughly the same purchasing power as $120,000 in San Francisco or $95,000 in London. The primary cost drivers are housing (typically 25-40% of expenses), followed by groceries, transportation, healthcare, and utilities. Cost of living indices compare cities against a baseline (usually New York City = 100) across multiple spending categories.
How are cost of living indices calculated?
The comparison uses a weighted index system with New York City as the reference point (index = 100). Each category — general costs, rent, groceries, restaurants, transport — is indexed separately, then combined with weights reflecting typical household spending. Rent is weighted at 30% because housing is usually the single largest variable cost when relocating abroad.
What factors affect cost of living beyond the index?
Raw indices don't tell the whole story. Exchange rates fluctuate daily and can shift effective costs by 10-20% in a year. Lifestyle differences matter — eating out in Tokyo is surprisingly affordable while groceries are expensive. Healthcare costs vary enormously but aren't captured in simple price indices. Your actual experience depends on specific spending patterns, not averages.
Planning a move abroad? Check our Currency Exchange Calculator to compare transfer costs, and the Tax Residency Checker to understand your tax obligations.