HUD structures most income-based programs for people whose income is 50 percent or less of the median income in the area, but this figure is adjusted based on family size. For example, the median income in San Francisco is $115,300. Eligibility for very low-income housing starts at $46,100 for a single person. This number increases to $52,650 for two people and to $65,800 for a family of four. There are also extremely low-income programs that prioritize the needs of those with a median income of $27,650 for an individual and up to $39,500 for a family of four. Because of the high cost of living in the area, San Francisco also offers subsidies for those meeting the low-income standard of $73,750 for an individual and $105,350 for a family of four, which is 80 percent of the median income.