Toronto police say they were called to the area of Dundas Street West and University Avenue on the evening of Sunday, Dec. 29, 2013.
Bieber, 19, attended a Toronto Maple Leafs game that evening at the Air Canada Centre.
At the time, police told The Canadian Press they were investigating an assault allegation but said it was unclear whether it was Bieber or a member of his entourage who was the subject of a complaint.
Police sources tell CBC News Bieber will arrive in Toronto today and will be officially charged at the 52 Division police station with a notice to appear at a later date.
The charge is the latest legal scrape for the heartthrob who was born in London, Ont., and raised in nearby Stratford.
Last week Bieber was arrested in Miami Beach, Fla., and charged with driving under the influence, resisting arrest without violence and driving with an expired licence after police said he had been stopped while drag racing down a street before dawn.
Bieber was accused of racing a rented, yellow Lamborghini alongside a red Ferrari driven by a friend identified as rhythm and blues singer Khalil.
Police said Bieber admitted to smoking marijuana, drinking and taking a prescription medication.
Bieber's blood-alcohol levels in the Miami incident weren't released. Under Florida law, people under the age of 21 are considered driving under the influence if they have a blood-alcohol content of 0.02 or more — a level the 5-foot-9, 140-pound star could reach with one drink.
A Miami-Dade County judge set a Feb. 14 arraignment date for the Miami incident. Bieber was released on $2,500 bail. In an arraignment, prosecutors formally file charges and a plea is entered, although a defendant's lawyer can enter the plea in writing. Bieber might not be required to attend.