Terms like "rich" are relative to their surrounding society, so I look for statistical guidance. Let's say you divide the country into even quintiles by income: lower class, lower-middle, middle-middle, upper-middle, and upper. That would make the upper class the top 20%. If we further divided that into three even groups (lower-upper, middle-upper, and upper-upper), then the upper-upper class would be the top 7%, approximately. I'd use the label "rich" for members of the upper-upper class. Using that definition, you're rich if your household's annual income is in the ballpark of $170,000 or higher.