Want to earn extra money through a side hustle? Here's why 1 in 3 Americans do it.

The gig economy is still big in the U.S. and growing.

More than a third (36%) of U.S. adults are working a side hustle – earning money in addition to their main source of income – according to a new Bankrate survey. They are earning more than they did last year, with the average side hustler making $891 a month, up from $810 last year.

Though the number of respondents who said they had a side hustle was down slightly from last year's 39%, it is way up from 2019 when Bankrate first started surveying respondents about their extra gigs, Ted Rossman, Bankrate senior industry analyst, told USA TODAY. By comparison, in 2019, 19% of respondents said they had a side hustle.

"More people are side hustling because of inflation and because of high interest rates," Rossman said. "Technology has made it easier as well. A lot of people are doing work from home and things online and via various mobile apps."

Updated numbers are not widely available, but in 2018, Marketdata estimated the gig and side hustle market at $2.58 trillion. That year, analysts thought 36% of the U.S. workforce of 160 million already had an extra gig job. That number was forecasted to grow by more than 50% by 2027 to 83 million Americans working a side hustle.

And then Covid happened.

More than a third of Americans, or 36%, are working a side hustle, such as dog walking, according to a new Bankrate survey.
More than a third of Americans, or 36%, are working a side hustle, such as dog walking, according to a new Bankrate survey.

The number of people who picked up a side hustle spiked during the pandemic, said Bryce Colburn, lead editor covering small businesses for USA TODAY/Blueprint, a personal finance content partner to USA TODAY.

Colburn, whose journalists have written several stories about side hustles, said that while he can't say the side hustle industry grew directly because of COVID-19, the spike in the number of people who had side hustles during and after the pandemic is pretty clear.

"Remote work has definitely been a huge factor in the growing of side hustles," Colburn said. "We now have technology to do remote work, which then means that now if you're home, you also can work on other things."

Who is doing side hustles?

All ages are taking on side hustles, but more millennials and Gen Zers seem to have side hustles, Colburn said.

Colburn's observation matches results from Bankrate's study: Gen Zers (ages 18-27) had the highest number of people with a side hustle (48%) compared with millennials (ages 28-43) with 44%. Among Gen Xers (ages 44-59), 33% had an extra job, while 23% of baby boomers (ages 60-78) said they had a side gig.

Parents of children under 18 are more likely to have a side hustle (45%) than adults without children (36%) or those with adult children (28%), according to the survey.