Unifor, the largest private-sector union, says some 3,700 frontline store employees walked off the job just after midnight.
It says members of Local 414 rejected a tentative labour deal reached last week, but provided few other details.
Picket lines at some of the 27 affected locations formed at 8 a.m., and Unifor is set to hold a news conference at one east-Toronto store later this morning.
“The settlement provided significant increases for employees in all four years of the agreement, as well as pension and benefits improvements for all employees, including part-time employees.”
Unifor national president Lana Payne said in a statement that the tentative agreement was brought to members because it contained “considerable gains” but they have made it clear that it isn’t enough.
“This decision to go on strike comes after years of these workers being nickelled and dimed while facing increased precarity and eroded job quality,” Payne said.
“It comes after having pandemic pay stripped away. It comes at a time of record profits and soaring CEO compensation. It comes at a time when life has become simply unaffordable for so many of these workers who risked their health and safety during the pandemic.”
Gord Currie, president of Unifor Local 414, said in the same statement that front-line grocery workers deserve respect.
“You know the system is broken when front-line workers can’t afford food, rent or gas,” he said.