More than half of employees, 53%, report feeling overworked, according to the inaugural Workplace Index conducted by Staples Advantage, the business-to-business division of Staples Inc. (NSDQ:SPLS).  However, 86% are still happy at work and motivated to rise in their organization.

 “With the rise of the mobile workforce and the resulting ‘always on’ work culture, it’s not a surprise that employees are feeling overworked and burnt out,” said Schawbel. “While many are still happy at work, we have to ask whether it’s because they’re truly inspired and motivated, or simply conditioned to the new reality? Either way, employers need to retain talent and optimize productivity, engagement and loyalty with employees.”

The survey found employees are working longer days, and about a quarter of them regularly work after the standard workday is done and about four out of 10 work on weekends at least once a month.

Almost four out of 10 employees surveyed acknowledged that burnout is a motivator for a new job search. Burnout is also eroding productivity, according to 66% of US employees. The biggest culprits cited in burnout include workload with 53%, personal pressures employees put on themselves to perform with 41% and time pressures with 40%.

About one in five employees expects to change jobs in the next twelve months, the survey found. This flight risk is slightly higher for millennials. With employees working longer days and on weekends, the biggest request for employers is to provide more flexibility.

In most cases, findings for the US and Canada were similar, however, a higher percentage of Canadians cited work-life balance and workplace flexibility as the most important workplace motivators. Following a similar pattern, more Canadian employees identified work-life balance as one of the most important considerations when looking for a new job and a higher number of Canadians reported they would actually leave their job if their telecommuting benefits were taken away.

The index examines workplace trends in the US and Canada. It was created in conjunction with Dan Schawbel, founder of WorkplaceTrends.com, a research and advisory membership service for HR professionals, and the managing partner of Millennial Branding, a Gen Y research and consulting firm.

The survey was conducted among 2,602 employees across a variety of companies, including 1,528 employees in the US and 1,074 employees in Canada. The interviews were conducted online by Redshift Research in May 2015.