Why the 4-day workweek might be closer than you think — and the 10 careers best suited to it

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How would you like a four-day workweek?

It may sound like a trick question, but it could become an increasingly common one as employers look for alternative ways to attract staff and boost productivity.

Research from job search site FlexJobs suggests that a wide range of industries, from finance to recruitment, are opening up to the idea of a shorter workweek.

Based on analysis of more than 50,000 U.S. companies' job postings, FlexJobs found that over the past year the following 10 industries were the most likely to hire for flexible positions, including those with four-day weeks:

  • Sales
  • Computer & IT
  • Medical & health
  • Customer service
  • Education & training
  • Account/project manager
  • Administrative
  • Accounting & finance
  • Marketing
  • HR & recruitment

Of course, the notion of a condensed workweek is nothing new. Fans of the four-day week have been espousing its benefits from a productivity and cost-cutting perspective since the 1970s. Indeed, in 1974, when the British government introduced a three-day workweek following an energy shortage, a national survey reported a 5 percent increase in productivity levels.

However, with job disruption on the up and employees demanding greater flexibility at work, its scope is growing. A lifestyle that was once limited to a select few now "fits with more industries and jobs than you might imagine," Jim Link, chief human resources officer (North America) at global recruitment agency Randstad, told CNBC Make It.

And it appears some employers are keen to make the shift.

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4-day weeks in action

Last month, a New Zealand-based trusts, wills and estates company made headlines after dubbing its two-month trial of a four-day week a resounding success. It now plans to make it a permanent fixture. Meanwhile, last week a school district in Colorado cut Mondays from its timetables in a bid to attract staff and cut costs.

Even billionaire businessman Richard Branson has weighed in on the debate, writing in a blog post earlier this year that it would "benefit everyone" to have a flexible schedule like that enjoyed by his staff at Virgin Management.

"Savvy employers are catching on to the fact that employees are increasingly demanding better work-life balance and the opportunity to get work done at non-traditional places and times," said Link. "The four-day workweek is a perfect example of that."

Lindsay Grenawalt is head of people at Cockroach Labs, a New York-based computer software company that has been running its version of the four-day week – "Free Fridays" – since it was launched by three former Google employees in 2015. Designed neither strictly for working nor strictly for downtime, Cockroach Labs' "Free Fridays" are intended as an opportunity for staff to "take back control," with many using them for study, long-term projects or family time.

As an HR manager, Grenawalt noted that she was "open-mouthed" when the founders first presented her with the idea. But, having seen it work in practice in her two years at the company, she said it has challenged her to "think outside the box" about new ways to stay competitive and motivate employees.

"It's very contrary to what American culture is, but I think if we're going to hold onto talent we have to get creative about how you're going to hire and retain talent," she said. According to the Bureau of Labor Statistics, the average American works 44 hours per week, or 8.8 hours per day.

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How viable is it?

While there's no cut and dried rule for how a four-day week would work, some suggest the most sensible option is to add an extra hour or two to each of the other workdays to compensate for lost time.

According to FlexJobs' Rachel Jay, a career writer, that could be a "boon" for workers' productivity, providing them with "longer stretches of uninterrupted time to work."

However, Adam Edwards, business director (Singapore) of global recruitment firm Hays, noted that "pressure on individuals to achieve the same output in four days as they have done previously in five could have a negative impact on