The charity reported a 29% year-on-year rise in calls from 2,256 and 2,910 in 2016 from 752 individual callers. It compared a sample of calls from 1 January to 31 November to the same period last year.
The charity called out "stress and anxiety, workplace pressure and calls from victims of domestic abuse" in particular. It also financially supported 243 people this year.
The rise in the calls may actually be a positive sign of employee attitudes changing. According to Nabs’ head of support, Lorraine Jennings, more people are willing to speak out when it comes to their "personal well-being".
She said: "In 2016 employees are no longer putting up with undue stress and workplace pressure as the status quo – millenials are much more vocal about how they want to live their work lives and increasingly they are looking for balance.
"Those employers who don’t take employee wellbeing seriously risk a talent exodus."