For states with expanded Medicaid, you can earn no more than 138% of the federal poverty level to qualify. For a single individual, that's about $20,120 in pretax income. The income limit for a family of four is $41,400. Other types of low income health insurance have different income limits. You might qualify for a premium subsidy if your income is at least at the federal poverty level. In 2023, that's $14,580 for a single person and $30,000 for a family of four.