Football Season has officially ‘kicked off’ and millions of Americans participating in Fantasy Football are amped up!

Challenger Gray & Christmas says the imaginary leagues will cost the U.S. economy more than $13 billion dollars in lost productivity on the job in 2014.

The employment firm’s estimate of $13 billion in lost productivity is a measure of wages paid to unproductive workers, according to a statement.

It says, “if the company is paying someone $20 per hour, and one hour of his or her work time was spent researching players or shuffling rosters—then that is $20 in lost wages.”

In the end, when you multiply those lost wages by the number of people participating, and then multiply total by the typical 15-week Fantasy Football schedule— That’s where the firm gets $13.4 billion.

The outplacement firm acknowledges Fantasy Football isn’t the only distraction in the office.

There’s still the latest Justin Bieber incident, or Kim Kardashian fashion moment that’ll ultimately become watercooler banter. Online shopping and email are also time-killers at the office.

While many offices discourage Fantasy sports leagues, Challenger cites an Iposos survey from 2006 which says, 40% of respondents believe fantasy sports participation is a good thing in the workplace, since it increases camaraderie among employees.

One in five said their involvement enabled them to make a valuable business contact.

Whether you’re ‘for’ or ‘against’ it, the Fantasy Sports Trade Association, says there are over 41 million total people managing leagues (including other sports) in North America, as of 2014.

That’s up from 32 million in 2010.