The report found that there are no U.S. states where a single person can live comfortably with a salary under $80,000. According to the report, it takes a minimum salary of $124,467 for a single adult to live comfortably there. Here are the 10 most (and least) expensive states for a single adult with no children. ConnecticutIncome needed for a single adult, 2025: $105,164.80Least Expensive States for a Single Adult With No Kids to Live Comfortably1. MississippiIncome needed for a single adult, 2025: $86,320.00Click here for SmartAsset's full report.