The number of Americans working in the “on-demand economy” will grow to 7.7 million in 2020 from 3.9 million today, according to a new study released by Intuit Inc.

The survey also found that people use on-demand work to supplement existing income, fill near-term financial needs and build a sustainable future. It also found there is general satisfaction with on-demand work.

“We’re continuing to see how profoundly the on-demand economy and technology is reshaping the American workforce and overall economy,” said Dan Wernikoff, executive VP and general manager of Intuit TurboTax. “This new data demonstrates how more people are using on-demand work to improve their financial stability.”

Survey results include:

• On-demand work is used to supplement existing income: The average person working an on-demand job spends 11 hours per week and earns 24% of their household income via on-demand work. Forty-one percent also have a traditional full-or part-time job.
• On-demand work fills near-term financial needs: Sixty-six percent of people working on-demand report having variable monthly income. Forty-one percent say that a financial hardship — such as a job loss, medical problem or unexpected major expense — affected them during the prior year. By comparison, just 18% of all Americans in a recent US Federal Reserve survey reported encountering a financial emergency.
• On-demand work is used to build a sustainable future: Many people use on-demand economy work to either develop a new business or to supplement and expand an existing business. Thirty-seven percent already own a business, and 21% want to build a business.
• There is general satisfaction with on-demand work: Thirty-eight percent of people working in the on-demand economy feel they are better off, while only 14% believe they are worse off. Eighty-one percent plan to continue working an on-demand job over the next 12 months, and 67% of people are satisfied with their on-demand work.

The online survey included 6,247 people working via on-demand economy and online talent marketplaces. It was conducted between Sept. 20 and Nov. 18, 2016. Intuit said participating platforms include Lyft, Amazon Mechanical Turk, Upwork, TaskRabbit, Wonolo, MBO Partners, OnForce, Work Market, Catalant, Field Nation, Kelly Services and Avvo.