 Speaking of work, many Americans are working side jobs these days. And WTOP business reporter Jeff Claybaugh says the extra income can really add up. Working just 10 hours a week on a side hustle earns an average of $14,000 a year. That's according to state and national wage data. The highest paying side hustles are graphic designers, web developers, writers and bloggers. Housekeepers and babysitters are the worst.