Source: http://www.buzzfeed.com/johanabhuiyan/wh...

Mohrer wouldn’t give an exact number of how many drivers make $90,000 a year, arguing that he didn’t think it was a valuable figure. But in order to make $90,000 a year, a driver would have to make $7,500 a month or approximately $1,731 a week. If a driver typically works 12-hour days, 6 days a week — a figure that doesn’t appear typical at all — he or she would need to net $24.04 an hour. If a driver worked 12-hour days, four or five days a week, the driver would need to net $36.06 or $28.85 an hour respectively. For a driver that typically works 10-hour days — a more realistic figure — and drives four to six days a week, the driver would need to make between an average of $28.85 and $43.27 an hour.

Based on our sample set of drivers who made an average of $30.23 an hour and worked an average of about 24.45 hours per week, the drivers made a weekly average of $739.12, or $3,178.23 a month — assuming they work these exact hours and times. Continuing at that very specific rate, those drivers would make about $38,434.42 a year.