 More than a third of adults say that they have a side hustle. Silvana Anao has more. A new Bankrate survey finds they're earning more than they did last year, with the average side hustle bringing in $891 a month. More than a third of people use at least some of that income for discretionary spending or to pay for regular living expenses. About a third think they'll always need to have a side hustle to make ends meet.