Detroit, MI: $42,772

Income needed: $42,772

50 percent for necessities: $21,386

30 percent for discretionary spending: $12,832

20 percent for savings: $8,554

Detroit has the lowest median income of the 50 cities on this list at $26,095, which results in a gap of $16,677 between actual income and the amount needed to live well in this city.