Purchasing Power

How It Works

Purchasing power is the true measure of what a salary is worth. It's calculated by dividing the nominal salary by the local cost of living index and multiplying by 100. For example: $120,000 in San Francisco (COL 180) has purchasing power equivalent to $66,667 in an average-cost city (120,000 ÷ 180 × 100). The same $120,000 in Houston (COL 93) has purchasing power equivalent to $129,032 — nearly double. This concept is critical when evaluating remote work opportunities and relocation decisions. Remote workers earning a Silicon Valley salary while living in a low-cost city can have extraordinary purchasing power. However, some companies are adjusting remote salaries to reflect local cost of living, reducing this arbitrage. Federal government employees receive locality pay adjustments that attempt to equalize purchasing power across different duty stations — GS employees in San Francisco receive about 42% more base pay than those in the lowest-cost areas. Understanding purchasing power transforms salary comparison from a nominal exercise into a practical one: the question isn't "how much do I earn?" but "how much can I buy?"

Related Terms

• Cost of Living Index (COL Index) — A measure of how expensive it is to live in a given city compared to the national average (100) — accounting for housing, food, transportation, healthcare, and other essentials.
• Geographic Pay Differential — The difference in salary for the same job in different cities — reflecting local cost of living, labor supply and demand, state taxes, and industry concentration.